Source: http://www.patentsencyclopedia.com/app/20080226972
Timestamp: 2017-05-26 13:25:13
Document Index: 628423907

Matched Legal Cases: ['§119', 'art 210', 'art 220', 'art 210', 'art 220', 'art 210', 'art 220', 'art 220', 'art 220', 'art 220', 'art 220', 'art 200', 'art 220', 'art 220', 'art 220', 'art 220', 'art 220', 'art 600', 'art 600', 'art 600', 'art 250', 'art 250', 'art 250', 'art 250', 'art 250', 'art 250', 'art 310', 'art 310', 'arts 310', 'art\n310', 'art 410', 'art\n220', 'art 660']

Nohyun Kwag (Yongin-Si, KR)
Youngcheol Jang (Yongin-Si, KR)
Patent application number: 20080226972
Secondary battery - Patent application - capable of assembling a bare cell and a protective circuit module in a manner of mechanical connection without performing a molding
Nohyun Kwag
Youngcheol Jang
A secondary battery capable of assembling a bare cell and a protective
circuit module (PCM) in a manner of mechanical connection without
performing a molding is provided. The secondary battery includes a bare
cell whose top surface is provided with an electrode terminal having a
polarity, a first case covering the top surface of the bare cell, a
second case covering a first side surface of the bare cell, a first lead
tab coupling the electrode terminal to the PCM, and a second lead tab
coupling a surface of the bare cell having another polarity to the
protective circuit module. Both of the first and the second lead tabs are
covered by the first case.Claims:
1. A secondary battery comprising:a bare cell for producing electricity,
the bare cell including a top surface and a first side surface, the top
surface being provided with an electrode terminal having a polarity;a
first case covering the top surface;a second case covering the first side
surface, the second case including a protective circuit module;a first
lead tab coupling the electrode terminal to the protective circuit
module; anda second lead tab coupling a surface of the bare cell having
another polarity to the protective circuit module, both of the first and
the second lead tabs being covered by the first case.
2. The secondary battery as claimed in claim 1, wherein the bare cell
includes a bottom surface that faces the top surface, a second side
surface that faces the first side surface, a front surface, and a back
surface that faces the front surface, and the electrode terminal is
electrically insulated from the top surface, each of the front and the
back surfaces being wider than any of the top, bottom, first side, and
second side surfaces.
3. The secondary battery as claimed in claim 2, wherein the second case
comprises:a first case part covering the first side surface; anda second
case part covering the bottom surface of the bare cell.
4. The secondary battery as claimed in claim 3, wherein the second case
part comprises:a base part that is substantially parallel to the bottom
surface; anda side wall part that is substantially parallel to the front
surface, the side wall part of the second case part covering an edge
portion of the front surface.
5. The secondary battery as claimed in claim 2, wherein the first case
comprises:a base part that is substantially parallel to the top surface;
anda side wall part that is substantially parallel to the front surface,
the side wall part of the first case covering an edge portion of the
6. The secondary battery as claimed in claim 2, wherein each of the first
and second lead tabs extends substantially parallel to the top surface.
7. The secondary battery as claimed in claim 6, wherein the first lead tab
includes an insulating layer for preventing short circuit between the
first and the second lead tabs.
8. The secondary battery as claimed in claim 7, wherein the insulating
layer is formed to enclose the first lead tab.
9. The secondary battery as claimed in claim 6, wherein an insulating
layer is formed to enclose both of the first and the second lead tabs,
the insulating layer separating the first lead tab from the second lead
10. The secondary battery as claimed in claim 6, wherein one of the first
and second lead tabs includes a bending section that shifts the one of
the first and second lead tabs away from another of the first and second
lead tabs.
11. The secondary battery as claimed in claim 3, further comprising a
label that covers the front and the back surface of the bare cell.
12. The secondary battery as claimed in claim 11, wherein the label covers
a portion of the first case and a portion of the second case.
13. The secondary battery as claimed in claim 1, wherein the protective
circuit module is mounted in an inner side of the second case through an
14. The secondary battery as claimed in claim 1, wherein the second case
is coupled to the bare cell by a double-sided tape.
15. The secondary battery as claimed in claim 1, wherein the first case is
coupled to the bare cell by a double-sided tape.
16. The secondary battery as claimed in claim 1, wherein the second case
is connected to the first case.
17. The secondary battery as claimed in claim 16, wherein the second case
comprises a coupling part formed at one end of the second case, the
coupling part having a coupling groove, the depth of the coupling groove
is substantially the same as a thickness of one end of the first case,
the second case being connected to the first case in a manner that the
one end of the first case fits into the coupling groove of the second
case.Description:
[0001]This application makes reference to, incorporates the same herein,
and claims all benefits accruing under 35 U.S.C §119 from an
the 16th of Mar. 2007 and there duly assigned Serial No.
10-2007-0026127.
[0003]The present invention relates to a secondary battery, and more
particularly to an inner pack type of a secondary battery capable of
assembling a bare cell and a protective circuit module (PCM) in manner of
a mechanical connection without performing a molding so that the assembly
of the bare cell and the protective circuit module (PCM) can easily be
performed as well as, if necessary, the disassembly and reassembly of the
bare cell and the protective circuit module (PCM) can be performed, and
at the same time their works can easily be performed.
[0005]Generally, a secondary battery is capable of being charged and
discharged unlike a primary battery that is not capable of being charged.
The secondary battery has widely been used in small advanced electronic
equipments such as a cellular phone, a PDA, a notebook computer, etc. In
particular, since a lithium secondary battery has operating voltage of
3.6V that is 3 times higher than a nickel-cadmium battery or a
nickel-hydrogen battery largely used as a power supply for electronic
equipment and has high energy density per unit weight, the use of the
battery rapidly increases.
[0006]Such a lithium secondary battery mainly uses lithium-based oxide as
a positive electrode active material and carbon material as a negative
electrode active material. And, the lithium secondary battery is
manufactured in various types. As representative types, there may be a
cylindrical type, a prismatic type, and a pouch type.
[0007]The configuration of the lithium secondary battery will briefly be
described based on the prismatic type. The prismatic type of secondary
battery includes a jelly-roll type of electrode assembly, which is formed
by stacking and winding a positive electrode plate and a negative
electrode plate with a separator interposed therebetween, a can having
one side open to receive the electrode assembly, and a cap assembly
sealing the open side of the can. Herein, the structure, which includes
the electrode assembly, the can, and the cap assembly, is usually
referred to as a bare cell. Such a bare cell may be considered one
independent secondary battery.
[0008]The structure in which protective circuit module (PCM) is assembled
into the bare cell is usually referred to as a core pack. Also, the
secondary battery used for small electronic equipments, such as a
cellular phone, a PDA, a digital camera, etc. is usually used in a form
of a battery pack. Such a battery pack is made by packing the core pack
including protective circuit module (PCM) and the bare cell through a
molding and then wrapping them with a label, or is made by inserting the
core pack in an outer case, which is usually referred to as a hard case.
[0009]Recently, a compatible built-in batter pack (hereinafter referred to
as an inner pack), which is designed in a relatively simple form, is
widely used for various kinds of small electronic equipments.
[0010]A general form of the inner pack is formed by disposing a PCM on a
relatively long side of the bare cell and connecting the bare cell and
the PCM through electrical connection member, and then molding the bare
cell and the PCM with molding resin.
[0011]A process of molding the bare cell and the PCM by means of an insert
injection molding will briefly be explained below. The process includes
disposing the core pack, in which the bare cell and the PCM are
electrically connected, in a molding space of a mold formed of an upper
metallic mold and a lower metallic mold, and then injecting molding resin
through an inlet of the upper metallic mold. Then, the injected molding
resin is solidified to form a molding part.
[0012]However, as the conventional inner pack described above is molded
with the molding resin for connecting the bare cell with the PCM, it
should be subject to a troublesome working process of mounting the core
pack in the metallic mold, injecting the molding resin in the molding
space of the metallic mold, and separating the inner pack in which the
molding part is formed from the metallic mold by means of the
solidification of the molding resin.
[0013]Herein, since the molding resin once injected in the molding space
can not be recovered again, the high accuracy of the process of injecting
the molding resin is required, thereby causing difficulty in processing.
And, even though high accuracy of the injection of the molding resin
could be maintained, non-uniform injection cannot be prevented due to the
characteristics of the molding resin, which is amorphous. Therefore, due
to the defect of the molding part, the defective rate of the inner pack
increases. Further, since the molding part in a viscous state is
integrally formed with the core pack when the molding part is defectively
molded, it is very difficult to perform a reworking.
[0014]Since the molding resin is injected in the molding space of the
metallic mold at relatively high pressure, the high pressure to the
molding resin is transferred to the core pack so that the arrangement of
the bare cell and the PCM is disturbed, causing defect and misalignment.
[0015]Also, the molding resin shrinks in a solidification process.
Therefore, if the molding resin is not uniformly injected in the molding
space, the shrinkage of the molding resin is greater at a specific
portion than other portions. This non-uniform shrinkage causes problems
that the surface of the molding part becomes irregular and the specific
portion collapses. Thereby, this problem causes the appearance defect of
the inner pack as well as frequent contact defect while the completed
inner pack contacts the electronic equipment.
[0016]The present invention suggests a solution for above mentioned
problems. It is an aspect of the present invention to provide a secondary
battery capable of achieving an assembly structure including an
electrical connection of a bare cell with a protective circuit module
(PCM) through manner of a mechanical assembly so that the assembly of the
bare cell and the PCM can easily be performed as well as if necessary,
the disassembly and reassembly of the bare cell and the PCM can be
performed, and at the same time their works can easily be performed.
[0017]It is another aspect of the present invention to provide a secondary
battery capable of achieving an assembly structure of a bare cell and a
PCM in manner of a mechanical assembly through a separately manufactured
case so that defect rate after completion can considerably decrease.
[0018]It is still another aspect of the present invention to provide a
secondary battery capable of improving structural integrity of a pack,
since a bare cell and a PCM including a protective circuit board does not
deform from the initial arrangement during a pack process.
[0019]In order to achieve the aspects, there is provided a secondary
battery including a bare cell having a top surface and a first side
surface where the top surface is provided with an electrode terminal
having a polarity, a first case covering the top surface, a second case
covering the first side surface and including a protective circuit
module, a first lead tab coupling the electrode terminal to the
protective circuit module, and a second lead tab coupling a surface of
the bare cell having another polarity to the protective circuit module,
both of the first and the second lead tabs being covered by the first
[0020]The bare cell may have a bottom surface that faces the top surface,
a second side surface that faces the first side surface, a front surface,
and a back surface that faces the front surface. The electrode terminal
may be electrically insulated from the top surface. Each of the front and
the back surfaces may be wider than any of the top, bottom, first side,
and second side surfaces.
[0021]The second case may include a first case part covering the first
side surface, and a second case part covering the bottom surface of the
bare cell. The second case part may include a base part that is
substantially parallel to the bottom surface, and a side wall part that
is substantially parallel to the front surface. The side wall part of the
second case part covers an edge portion of the front surface. The first
case may include a base part that is substantially parallel to the top
surface, and a side wall part that is substantially parallel to the front
surface. The side wall part of the first case covers an edge portion of
the front surface.
[0022]Each of the first and second lead tabs may extend substantially
parallel to the top surface. The first lead tab may include an insulating
layer for preventing short circuit between the first and the second lead
tabs. The insulating layer may be formed to enclose the first lead tab.
An insulating layer may be formed to enclose both of the first and the
second lead tabs. The insulating layer, however, separates the first lead
tab from the second lead tab.
[0023]One of the first and second lead tabs may include a bending section
that shifts the one of the first and second lead tabs away from another
of the first and second lead tabs.
[0024]The secondary battery may further include a label that covers the
front and the back surface of the bare cell. The label may cover a
portion of the first case and a portion of the second case.
[0025]The protective circuit module may be mounted in an inner side of the
second case through an insert injection molding.
[0026]The second case may be coupled to the bare cell by a double sided
tape. The first case may be coupled to the bare cell by a double sided
[0027]The second case may be connected to the first case. The second case
may include a coupling part formed at one end of the second case. The
coupling part may have a coupling groove. The depth of the coupling
groove is substantially the same as a thickness of one end of the first
case. The second case is connected to the first case in a manner that the
[0028]A more complete appreciation of the invention, and many of the
[0029]FIG. 1 is an exploded perspective view showing one exemplary
embodiment of a secondary battery according to the present invention;
[0030]FIG. 2 is another perspective view of main parts of FIG. 1;
[0031]FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
[0032]FIG. 4 is a cross-sectional view showing other exemplary embodiment
of an insulating layer for a lead tab of the secondary battery according
[0033]FIGS. 5 to 8 are perspective views showing an assembly process of
the secondary battery in sequence according to the exemplary embodiment
[0034]Hereinafter, the embodiment of the present invention will be
described in more detail with reference to the accompanying drawings.
[0035]FIG. 1 is an exploded perspective view showing one exemplary
embodiment of a secondary battery of the present invention, FIG. 2 is
another perspective view of main parts of FIG. 1, FIG. 3 is a
cross-sectional view taken along line A-A of FIG. 1, and FIG. 4 is a
cross-sectional view showing other exemplary embodiment of an insulating
layer for a lead tab of the secondary battery of the present invention.
And, FIGS. 5 to 8 are perspective views sequentially showing an assembly
process of the secondary battery shown in the exemplary embodiment of
[0036]Referring to FIGS. 1 through 4, a secondary battery of the present
invention includes a bare cell 100, a second case 200, a first case 600,
a first lead tab 300, and a second lead tab 400. The bare cell 100 is
able to be charged and discharged. The bare cell 100 may have a shape
having four narrow sides and two wide surfaces facing each other, but the
shape of the bare cell 100 of the present invention is not limited
thereto. Any one of the four narrow sides of the bare cell 100 can be
coupled with an electrode terminal 110. Specifically, the bare cell 100
includes a front surface, a back surface that faces the front surface, a
top surface, a bottom surface that faces the top surface, and two side
surfaces (a first and a second side surfaces) that face each other. The
front and back surfaces are relatively wider than the top, bottom, and
two side surfaces. The electrode terminal 110 is formed on the top
surface. At this time, the electrode terminal 110 is coupled to the bare
cell 110 being insulted from the surfaces of the bare cell 100. The
electrode terminal 110 is formed on the top surface of the bare cell 100
in a manner that an insulating gasket 120 is interposed on the
circumference of the electrode terminal 110, and the electrical
insulation between the electrode terminal 110 and the surfaces of the
bare cell 100 is achieved by means of the insulation gasket 120. The
configuration of the bare cell 100 has been applied to a general
secondary battery. Therefore, detailed descriptions of configuration
thereof will be omitted, and brief descriptions for the configuration
thereof will be given below.
[0037]The bare cell 100 includes an electrode assembly, which is formed by
stacking a positive electrode plate and a negative electrode plate with a
separator interposed therebetween, a can having one open side to receive
the electrode assembly through the open side, and a cap assembly sealing
the open side of the can. The cap assembly includes a cap plate so that
the cap plate seals the open side of the can. The cap plate is provided
with an electrode terminal that is electrically insulated from other part
by means of an insulation gasket. Herein, the can and the cap plate form
an outer case of the bare cell.
[0038]The first case 600 covers a surface of the bare cell 100 coupled
with the electrode terminal of the bare cell. In the present embodiment,
the first case 600 is coupled to the top surface of the bare cell 100 on
which the electrode terminal 110 is formed. The second case 200 covers at
least a surface of the bare cell 100 that is not coupled with the
electrode terminal 110 of the bare cell 100. In the present embodiment,
the second case 200 covers the bottom surface and one of the side
surfaces of the bare cell 100, both of which are not coupled to the
electrode terminal 110. Accordingly, the three surfaces of the bare cell
100 are covered by means of the first case 600 and the second case 200.
Preferably, the first case 600 and the second case 200 are manufactured
with an injection molding using the same material so that they are
harmonized well in their appearance or other different aspects.
[0039]The configuration of the second case 200 will be described in more
detail. The second case 200 includes a first case part 210 and a second
case part 220. A first case part 210 is vertically connected to a second
case part 220. Therefore, the second case 200 is overall formed in a
L-shape. The first case part 210 covers a side surface of the bare cell
100, and the second case part 220 covers the bottom surface of the bare
cell 100 that faces the top surface that is coupled to the electrode
terminal 110 of the bare cell 110. A protective circuit module (PCM) 230
including a protective circuit for the bare cell 100 is mounted on an
inner side of the second case part 220. The PCM 230 includes a printed
circuit board on which several electronic elements is mounted.
[0040]The mount of the PCM 230 in the second case 200 can be achieved by
means of an insert injection molding. In other words, while the PCM is
disposed in a molding space of a mold, molding resin is injected into the
molding space of the mold to mold the second case, so that the second
case and the PCM are integrally formed. Herein, the insert injection
molding is performed in a manner that an external terminal 240 of the PCM
230 can be exposed to outside through the second case 200.
[0041]The coupling of the first case 600 and the second case 200 to the
bare cell 100 is performed by means of double-sided tapes 510 and 520.
However, the present invention is not limited to the use of the
double-sided tapes. Therefore, the coupling thereof may be achieved by
means of other coupling means other than the double-sided tapes.
[0042]The inner sides of the first case 600 and the second case 200 may be
formed to receive the surfaces of the bare cell 100. Describing the
second case part 220 of the second case 200 as an example, the second
case part 220 includes a base part 220a corresponding to the bottom
surface of the bare cell 100 and a side wall part 200b protruded from an
edge of the base part 220a towards the bare cell 100. Therefore, a
receiving space having one side closed by the base part 220a is formed
inside the side wall part 220b. Therefore, the second case part 220 is
coupled to the bare cell 100 in a manner that the bottom surface of the
bare cell 100 is received in the receiving space inside the side wall
part 220b. The first case 600 is also formed to include a base part 600a
and a side wall part 600b so that it is coupled to the bare cell 100 in a
manner that the top surface of the bare cell 100 is received in the
receiving space inside the side wall part 600b of the first case 600.
[0043]One end of the second case 200 is provided with a door shape
coupling part 250 for connecting the first case 600, wherein the inner
side of the coupling part 250 is provided with a coupling groove 250a.
The coupling groove 250a is formed on a surface of the coupling part 250
that is substantially parallel to the first case 600 or to the top
surface of the bare cell 100. A depth of the coupling groove 250a is a
distance from the surface to the bottom of the groove. It is preferable
that the first case 600 is connected to one end of the second case 200 in
a manner that one end of the first case 600 is inserted into the coupling
groove 250a of the coupling part 250 of the second case 200. In other
words, one end of the first case 600 is supported by the inner surface
(or bottom) of the coupling groove 250a of the coupling part 250.
Therefore, the coupling of the second case 200 and the first case 600 may
be accomplished more sturdily. The depth of the coupling groove 250a is
substantially the same as the thickness of the one end of the first case
600 inserted thereinto. Therefore, the one end of the first case 600 fits
into the coupling groove 250a, and the surface of the first case, which
is parallel to the top surface of the bare cell, is smoothly matched to
the surface of the coupling part 250 on which the coupling groove 250a is
formed, so that a projected portion is not generated at the coupling
portion between the first case 600 and the second case 200. As a result,
the first case 600 and the second case 200 can be smoothly coupled.
[0044]The first lead tab 300 electrically connects the electrode terminal
110 of the bare cell 100 to the PCM 230. In other words, one and another
ends of the first lead tab 300 are electrically connected to the
electrode terminal 110 of the bare cell 100 and the PCM 230,
[0045]The second lead tab 400 electrically connects the outer surface of
the bare cell 100 to the PCM 230. In other words, one and another ends of
the second lead tab 400 are electrically connected to the outer case of
the bare cell 100 and the PCM 230, respectively.
[0046]In the present embodiment, it illustrates, by way of example, the
case where the electrode terminal 110 of the bare cell 100 is a negative
electrode and the outer surface of the bare cell 100 is a positive
electrode, but the present invention is not limited thereto.
[0047]The insert injection molding may be performed on the second case 200
and the PCM 230 in the state that ends of the first and second lead tabs
300 and 400 are connected to the PCM 230. Also, it is possible that the
first and second lead tabs 300 and 400 may be connected to the PCM 230 in
the state that the second case 200 and the PCM 230 is integrally formed
by the insert injection molding.
[0048]The first lead tab 300 and the second lead tab 400 are extended in
parallel along the top surface of the bare cell 100 from the PCM 230. The
extended first and second lead tabs 300 and 400 may be formed to be
connected to the electrode terminal 110 and the top surface of the bare
cell 100, respectively. At this time, the first and second lead tabs 300
and 400 have different polarities, so that the first and second lead tabs
300 and 400 are provided with an insulating layer for preventing short
circuit. As shown in FIG. 3, the insulating layer 320 may be formed by
applying an insulation material to the first lead tab 300. An insulating
layer can be formed on the second lead tab 400 in the same manner as the
first lead tab 300. Also, as another configuration of the insulating
layer, as shown in FIG. 4, an insulating layer 420 may be formed by
integrally wrapping the first and second lead tabs 300 and 400 but
separating the first lead tab 300 from the second lead tab 400.
[0049]The connection portion of the first lead tab 300 or the second lead
tab 400 to terminal part 310 or 410 is formed with a bending section to
better prevent the short circuit therebetween. Each one end of the first
lead tab 300 and the second lead tab 400 which are coupled to the
electrode terminal 110 of the bare cell 100 or on the surface of the bare
cell is connected to an enlarged width of terminal part 310 or 410.
Because the terminal parts 310 and 410 have widths larger than those of
the first and second lead tabs 300 and 400, the chance of the contact
therebetween is high. Therefore, one of the first and second lead tabs
300 and 400 is provided with a bending section so that the terminal part
310 of the first lead tab 300 and the terminal part 410 of the second
lead tab 400 are more far spaced away by means of the bending section,
making it possible to prevent the contact therebeween. The present
exemplary embodiment illustrates, by way of example, the structure that
the bending section 405 is formed in the second lead tab 400.
[0050]While the three surfaces of the bare cell 100 are covered by the
second case 200 and the first case 600, a label 700 (shown in FIG. 8) is
attached to wrap the remaining surfaces of the bare cell 100. With the
label 700, the outer surface of the bare cell 100 is insulated and the
outer surface of the bare cell 100, which is formed of metallic material,
is not directly exposed so that an appearance of the secondary battery 1
becomes more attractive. Also, the label 700 covers the side wall part
220b of the second case 200 and the side wall part 660b of the second
case 200, which are partly overlapped with the two wide front and back
surfaces of the bare cell so that the second case 200 and the first case
600 are supported by the adhesive strength of the label 700, and the
coupling force between the bare cell 100 and the two cases 200 and 600 is
[0051]The present exemplary embodiment describes, by way of example, that
the bare cell 100 is formed in a rectangular parallelepiped shape or a
shape similar thereto. That is, the bare cell 100 of this exemplary
embodiment has four narrow surfaces (top, bottom, and two side surfaces),
and two wide surfaces (front and back surfaces), and the electrode
terminal 110 is formed on the top surface. The first case 600 covers the
top surface that is provided with the electrode terminal 110, and the
second case 200 covers the bottom surface that faces the top surface, and
also covers one of the side surfaces, and any one of the long sides. The
shape of the bare cell 100 of the present invention is an example of a
general form of a built-in battery pack called the inner pack, but the
present invention is not limited thereto.
[0052]Hereinafter, an assembly process of the secondary battery configured
as above will be described with reference to FIGS. 5 to 8. The assembly
process described below is only one example and the present is not
limited thereto. The configuration of the secondary battery according to
the present invention may be made by several modified assembly processes.
[0053]FIG. 1 shows a secondary battery of the present invention before the
bare cell is coupled to the second case and the first case. FIG. 2 shows
the second case integrally formed with the protective circuit module
(PCM) through the insert injection molding. Herein, the PCM 230 may be
integrally formed with the second case 200 after the first and the second
lead tabs 300 and 400 are connected to the PCM 230. Alternatively, after
performing the insert injection molding on the PCM 230 and the second
case 200, the PCM 230 integrally formed with the second case 200 can be
connected to the first and second lead tabs 300 and 400.
[0054]The second case 200 integrally formed with the PCM 230 is coupled to
the bare cell 100. At this time, the coupling of the bare cell 100 and
the second case 200 is made by means of the double-sided tape 510 that is
attached on the bottom surface of the bare cell 100. FIG. 5 shows a state
in which the second case 200 is coupled to the bare cell 100. In order to
couple the first case 600 to the bare cell 100, the top surface provided
with the electrode terminal 110 of the bare cell 100 is attached with the
double-sided tape 520 as shown in FIG. 6. The first case 600 is coupled
to the bare cell 100 by means of the adhesive strength of the
double-sided tape 520, as shown in FIG. 7. At this time, one end of the
first case 600 is inserted into the coupling groove 250a formed in the
connection portion 250 of the second case 200 so that the connection
portion of the first case 600 and the second case 200 does not have any
projected portion. As a result, the connected side of the first case and
the second case, which are substantially parallel to the top surface, is
evenly connected forming a plane.
[0055]Finally, the label 700 is attached to wrap the two wide front and
back surfaces of the bare cell 100 and the another side surface that is
not covered by the cases 200 and 600 so that the completed secondary
battery is formed as shown in FIG. 8.
[0056]As described above, in the secondary battery 1 of the present
invention, the coupling of the protective circuit module (PCM) including
the protective circuit board and the bare cell is accomplished in a
mechanical manner. Therefore, even when the assembly of the bare cell and
the PCM is defective, they can easily be disassembled and then
reassembled. And, since the bare cell and the PCM can be well arranged
and then connected at a first try or at a second try if necessary, an
external shape is smooth, and the connection of the bare cell and the PCM
is stable. The stable connection can be achieved through a rework, if
[0057]As can be appreciated from the embodiments, with the secondary
battery according to the present invention, the coupling structure
including the electrical connection of the bare cell and the PCM is made
through the assembly manner so that the assembly work of the secondary
battery is easily made as well as if necessary, the disassembly and
reassembly work of the bare cell and the PCM can easily be made.
[0058]The bare cell and the PCM are made in the assembly manner through
the separately manufactured cases so that the defect rate after
completion may be considerably reduced.
[0059]And, since the arrangement between the PCM including the protective
circuit board and the bare cell is not deformed in the packing process
through which the PCM and the bare cell are coupled, the structural
integrity of the secondary battery is improved and the secondary battery
with the improved structural integrity reduces risk factors such as
deformation while being used so that the risk of the occurrence of the
internal short circuit or other abnormal malfunction reduces, making it
possible to improve the structural stability.
[0060]The above description is only one embodiment for implementing the
liquid crystal display according to the present invention, and thus the
present invention is not limited thereto. Accordingly, it would be
appreciated by those skilled in the art that changes might be made in
this embodiment without departing from the principles and spirit of the
invention, the scope of which is defined in the claims and their
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