Electrode assembly, battery cell, manufacturing method of electrode assembly, and manufacturing method of battery cell
The present invention relates to a method of manufacturing an electrode assembly, the method including: preparing an electrode laminate including at least one negative electrode, at least one positive electrode, and at least one separation film; generating a separation film assembly by bonding remaining portions of the separation film positioned in regions not corresponding to shapes of the negative electrode and the positive electrode; and cutting the separation film assembly so as to correspond to the shapes of the negative electrode and the positive electrode, and an electrode assembly manufactured by the method.
1. A method of manufacturing an electrode assembly, the method comprising:
preparing an electrode laminate including at least one negative electrode, at least one positive electrode, and at least one separation film;
generating a separation film assembly by bonding remaining portions of the separation film positioned in regions not corresponding to shapes of the negative electrode and the positive electrode; and
cutting the separation film assembly inwardly of a bonding line generated due to the bonding so as to correspond to the shapes of the negative electrode and the positive electrode.
2. The method of claim 1 , wherein the electrode laminate includes the at least one negative electrode, the at least one positive electrode, and a plurality of first separation films interposed between the negative electrode and the positive electrode, and
the first separation films have shapes different from those of the negative electrode and the positive electrode.
3. The method of claim 1 , wherein the electrode laminate includes:
a plurality of unit cells respectively including the at least one negative electrode, the at least one positive electrode, and at least one first separation film interposed between the negative electrode and the positive electrode; and
at least one second separation film disposed on an interface between the unit cells, and
at least one of the first separation film and the second separation film has a shape different from those of the negative electrode and the positive electrode.
4. The method of claim 1 , wherein the electrode laminate includes:
a plurality of unit cells respectively including the at least one negative electrode, the at least one positive electrode, and at least one first separation film interposed between the negative electrode and the positive electrode; and
a long sheet-type second separation film covering the unit cells, and
at least one of the first separation film and the second separation film has a shape different from those of the negative electrode and the positive electrode.
5. The method of claim 1 , wherein the electrode laminate includes the at least one negative electrode, the at least one positive electrode, and a long sheet-type first separation film covering the negative electrode and the positive electrode.
6. The method of claim 1 , wherein the generating of the separation film assembly is performed by fusing the remaining portions of the separation film.
7. The method of claim 1 , wherein the generating of the separation film assembly is performed at a temperature of (Tg−20)° C. to (Tg+20)° C., where Tg is a glass transition temperature of the separation film, defined by the inherent temperature at which a polymer material of the separation film changes from a rubbery state to a glassy state.
8. The method of claim 1 , wherein the cutting of the separation film assembly is performed using a cutting blade, a die, scissors, or a laser beam.