TECHNICAL FIELD
[0002] The present invention relates to a method for
manufacturing a secondary battery and a secondary battery.
15 BACKGROUND ART
[0003] Secondary batteries are rechargeable unlike primarily
batteries, and also, the possibility of compact size and high
capacity is high. Thus, recently, many studies on secondary
batteries are being carried out. As technology development
20 and demands for mobile devices increase, the demands for
secondary batteries as energy sources are rapidly increasing.
[0004] Rechargeable batteries are classified into coin type
batteries, cylindrical type batteries, prismatic type
batteries, and pouch type batteries according to a shape of a
25 battery case. In such a secondary battery, an electrode
2
assembly mounted in a battery case is a chargeable and
dischargeable power generating device having a structure in
which an electrode and a separator are stacked.
[0005] Also, the electrode assembly may be approximately
5 classified into a jelly-roll type electrode assembly in which
a separator is interposed between a positive electrode and a
negative electrode, each of which is provided as the form of
a sheet coated with an active material, and then, the positive
electrode, the separator, and the negative electrode are wound,
10 a stacked type electrode assembly in which a plurality of
positive and negative electrodes with a separator therebetween
are sequentially stacked, and a stack/folding type electrode
assembly in which stacked type unit cells are wound together
with a separation film having a long length.
15 [0006] Recently, the pouch-type battery in which a
stack/folding type electrode assembly is built in a pouch-type
battery case provided as an aluminum lamination sheet is
attracting much attention due to its low manufacturing cost,
light weight, easy shape deformation, and the like, and thus,
20 its usage is gradually increasing.

CLAIMS
1. A method for manufacturing a secondary battery, the
method comprising:
5 a folded cell formation process of seating unit cells,
each of which comprises at least one electrode and at least
one separator, on one surface of a separation film to
sequentially fold the unit cells, thereby forming a folded
cell;
10 a tape attachment process of attaching a pressing tape
to an end of the folded cell;
an accommodation process of accommodating the folded cell,
to which the pressing tape is attached, and an electrolyte in
a battery case; and
15 a pressing process of pressing an outer surface of the
battery case to press the folded cell.
2. The method of claim 1, wherein the unit cell further
comprises an electrode tab provided on an upper portion of the
20 electrode, and
in the tape attachment process, the pressing tape is
attached to the upper portion, at which the electrode tab is
disposed in the folded cell.
25 3. The method of claim 2, wherein, in the tape
31
attachment process, the pressing tape is further attached to
a lower portion of the folded cell.
4. The method of claim 2, wherein, in the tape
5 attachment process, the pressing tape is attached to the
outermost surface of the separation film.
5. The method of claim 4, wherein, in the tape
attachment process, when the cell to be folded is folded, the
10 pressing tape is attached to one or more surfaces of a front
or rear surface of the folded cell in a direction perpendicular
to a folding axis.