Title of Invention

A SECONDARY BATTERY MODULE

Abstract The invention discloses a secondary battery module. The secondary battery module includes at least two cells (5) stacked to a predetermined height; a lead member (6) at least partially bent to connect adjacent cells and form a single series circuit through electrode terminals (5a) of the cells (5) and having a safety device (11) for cell protection provided on at least one portion thereof and safety device peripherals (11a) bent at a predetermined angle with respect to the axial line of the lead member (6); insulating mediators (7) having a hole (7a) to guide bent portion of the lead member (6) and cylindrical bosses (7c) to prevent a short circuit; and at least two fasteners (10) to penetrate corresponding cylindrical bosses (7c) of the insulating mediators (7) in order to combine all components in a single body. The secondary battery module of the invention, makes it possible to easily and rapidly fabricate battery modules that meet various power demands for industrial instrument or an electric car by connecting a predetermined number of cells in series using detachable lead members.
Full Text A SECONDARY BATTERY MODULE
Technical Field
The present invention relates generally to a lead
member and a secondary battery module having the same, and
more particularly to a secondary battery module having a
plurality of cells stacked to a predetermined height and lead
members diagonally inserted into insulating mediators to
connect the cells in series and thereby output a desired
battery power for industrial instrument or an electric car.
Background Art
A single unit cell has a limited output and a small
power storing capacity. Therefore, a battery module
comprising a plurality of cells is generally used in an
electric car ti^ secure sufficient power and driving hours.
As shown in FIG. I, a conventional battery module 1
includes: a plurality of cells 2 disposed side by side; two
electrodes 2a provided respectively on two outmost cells 2;
two end plates 3 fastened to the outer sides of the two
outmost cells; and a plurality of steel bands 4 surrounding
the end plates 3 and the cells 2 as a whole.
In the prior art, however, leads 2b used to connect
adjacent cells in series are welded to the electrode
terminals of the cells, which makes it difficult to fabricate
battery modules that meet various power demands for
industrial instrument and electric cars.
Since the leads connecting the electrode terminals of
adjacent cells in series are exposed, an accidental short
circuit may occur in the cells due to an unintended drop of a
metal conductor onto the leads, which eventually results in
damage of the entire battery module.
Moreover, neither a ceil protection circuit nor a
safety device is used to protect the battery module against
damage caused by abnormar overcurrent, overcharge or
overdischarge conditions of the cells.
Brief Description of the Drawings
FIG. 1 is a schematic perspective view of a
conventional battery module for an electric car;
FIG. 2 is a schematic exploded perspective view of a
secondary battery module according to the present invention;
FIG. 3 is a schematic perspective view showing the
sequential assembly of a secondary battery module according
to the present invention; and
FIG. .4 is a schematic perspective view showing the
completely assembled state of a secondary battery module
according to the present invention.
Disclosure of the Invention
The present invention has been made to solve the above-
mentioned problems occurring in the prior art, and an object
of the present invention is to provide a detachable lead
member for easily and rapidly fabricating a battery module,
comprising a predetermined number of cells to meet various,
power demands fOr industrial instrument or electric cars by
connecting ERe cells in series using the detachable lead
member.
Another object of the present invention is to provide a
battery module having exposed lead members and electrode
terminals of cells covered with insulating supports and
fastened by fasteners to effectively prevent a short circuit
that may occur in the cells due to an unintended drop of a
conductor onto the battery module.
still another object of the present invention is to
provide a battery module having a cell protection circuit
provided on each cell or a safety device provided on each
lead member to protect cells or the battery module against
overcurrent, overcharge or overdischarge conditions.
In order to accomplish the above objects of the present
invention, lead members for a secondary battery module are at
least partially bent to connect adjacent cells and form a
single series circuit through electrode terminals of the
cells stacked to a predetermined height.
Also, a secondary battery module according to the
present invention uses lead members that are at least
partially bent to connect adjacent ceils and form a single
The invention provides a secondary battery module, which
comprises :
at least two cells stacked to a predetermined height;
a lead member at least partially bent to connect adjacent cells and form a single
series circuit through electrode terminals of the cells and having a safety device
for cell protection provided on at least one portion thereof and safety device
peripherals bent at a predetermined angle with respect to the axial line of the lead
member;
insulating mediators having a hole to guide bent portion of the lead member and
cylindrical bosses to prevent a short circuit; and
at least two fasteners to penetrate corresponding cylindrical bosses of the
insulating mediators in order to combine all components in a single body.
The foregoing and other objects, features and
advantages of the present invention will become more apparent
from the following detailed description when taken in
conjunction with the accompanying drawings.
Mode for Invention
Reference will now be made in detail to the preferred
embodiments of the present invention as shown in FIGs. 2 to -1 .
FIG. 2 is an exploded perspective view showing the
secondary battery module according to the present invention.
FIG. 3 shows the sequential assembly of the secondary battery
module according to the present invention.
Referring to FIG. 2, cells 5 of the secondary battery
module are stacked up to a predetermined height to connect
adjacent cells by means of lead members 5. Each lead member
6 is at least partially bent to connect adjacent cells and
form a single series circuit through corresponding electrode
terminals 5a.
The lead members 6 may comprise a safety device 11 such
as a fuse, bimetal breaker or PTC device to protect the, cells
5 from overcurrent, overcharge arid overdischarge. The safety
device 11 rapidly cuts charging or discharging current to the
cells 5 in the case of excessive temperature rise and
restarts the flow of current when the cells are cooled again
to a normal range of temperature. It is preferable to use a
PTC device to fabricate the battery module in a compact size.
Preferably, the lead members 6 are made of at least one material selected from a group consisting of,.copper, aluminum,
nickel-copper and copper-aluminuna.
As shown in FIGs. 2 to 4, the secondary battery module
according to the present invention has the cells 5 stacked to
a predetermined height to connect adjacent cells by means of
the lead members 6. The lead members 6 are used to form a single series, circuit by connecting the electrode terminals 5a of every two adjacent cells.
The secondary battery module may further include
insulating mediators 7 each having a hole 7a to guide the
bent portion of each lead member 6.
The secondary battery module may further include two
auxiliary terminals 8 disposed respectively on one electrode
terminal 5a of the top cell and on the electrode terminal 5a
of the bottom cell to be connected to corresponding electrode
terminals 5a of the two outmost cells (top and bottom cells).
The secondary battery module may further include two
insulating supports 9 for covering corresponding electrode
terminals 5a of the two outmost cells of the cells 5 stacked
and having a shape that partially expose corresponding
auxiliary terminals 8.
In addition, the secondary battery module may further
include a pair of fasteners 10 that coaxially penetrate holes
formed on both sides of the insulating supports9, lead
members 6 and insulating mediators 7 and those formed on the
electrode terminals 5a and auxiliary terminals 8 to
insulatedly combine the insulating supports 9, lead members 6,
insulating mediators 7, electrode terminals 5a and auxiliary
terminals 8 into a single body.
Each lead member 7 has two safety device peripheries
11a bent at a predetermined ang1 angle with respect to the axial
line of the lead member 7. Since each safety device
periphery lla bent at a predetermined angle with respect to
the axial line of the lead member 7, the hole 7a formed on
the corresponding insulating mediator 7 preferably has a
sloping surface 7b forming a predetermined angle with respect
to the axial line of the insulating mediator 7.
To prevent a short circuit of the cells 5 that may be
caused by the lead members 6 and the fasteners 10, each
insulating mediator 7 preferably has cylindrical bosses 7c at
positions where the fasteners 10 penetrate.
Preferably, at least one of the cylindrical bosses 7c
has a plurality of ribs 7cc formed in an outward radial,
direction so that heat transferred through the electrode
terminals 5a of the cells 5 can be smoothly released out.
To stack up and fix the plurality of cells 5 to a
predetermined height, each of the insulating mediators 7 has
two cut portions 7d and two alignment projections 7e at one
end, while having two interfitting recesses 7f and two
interfitting projections 7g at the other end, respectively on
the bottom and top portions thereof.
Each insulating support 9 has two cylindrical bosses 9a
at positions where the two fasteners 10 penetrate in order to
prevent an accidental short circuit of the cells 5 that may
be caused by the electrode terminals 5a, auxiliary terminals
8 and fasteners 10. Also, each insulating support 9
preferably has an opening 9b cut in a longitudinal direction
at least one end thereof.
The fasteners 10 consist of pairs of bolts 10a and nuts
10b or pairs of locking pins and locking rings (not shown).
Bolts 10a and nuts 10b are more preferable to tightly fasten
the plurality of cells 5 together to form a single battery
module 12.
Each insulating mediator 7 and the insulating support 9
are preferably made of at least one material selected from .i
group consisting of PBT (polybutylene terephthalate), ABL
(acrylonitrile-butadiene-styrene) and PC (polycarbonate)
resin. Also, it is preferable for each cell 5 to provide a'
cell protection Circuit not sEowh'T" "for protecting the cells
5 from overcurrent, overcharge or overdischarge conditions.
Hereinafter, the assembling process and operation of
the above-described secondary battery module according to the
present invention will be explained in detail.
A predetermined number of cells 5 are prepared and a
lower insulating support 9 is placed on a worktable (not
shown) . One of two auxiliary terminals 8 is fixed on the
insulating support 9 by fitting one of two cylindrical bosses
9a formed on the insulating support 9 into a through hole
formed on the auxiliary terminal 8.
In this case, since the auxiliary terminal 8 is
partially exposed through an opening 9b of the insulating
support 9, it can be electrically connected to an external
device (not shown).
Next, two electrode terminals 5a of a first cell 5 are
arrayed on the two cylindrical bosses 9a of the insulating
support 9. At this time, the two cylindrical bosses 9a of
the insulating support 9 also fit into through holes formed
on the two electrode terminals 5a.
Next, a lead member 6 that is bent stepwise is
diagonally inserted into an insulating mediator 7 through a
sloped hole 7a. The insulating mediator 7 coupled with the
lead member 6 is placed on the electrode terminals 5a of the
first cell 5.
In this case, one end of the lead member 6 contacts the
sides of a plurality of ribs 7cc formed around one of two
cylindrical bosses 7c of the insulating mediator 7 so that
the heat generated from the cell 5 can be smoothly released
out. Also, a safety device 11 provided at the center of the
lead member 6 rapidly blocks the flow of current when the
cell 5 is overheated, thereby protecting the cell.
Next, two electrode terminals 5a of a second cell 5
are arrayed on the two cylindrical bosses 7c of the
insulating mediator 7. At this time, the two cylindrical
bosses 7c of the insulating mediator 7 also fit into through
holes formed on the two electrode terminals 5a.
In this case, the first and second cells 5 are
connected in series by the lead member 6 diagonally inserted
into the insulating mediator 7 through the sloped hole 7a.
Next, another lead member 6 is diagonally inserted into
another insulating mediator 7 through a corresponding sloped
hole 7a. The insulating mediator 7 coupled with the lead
member 6 is placed on the electrode terminals 5a of the
second cell 5.
In this case, each of the insulating mediators 7 has
two cut portions 7d and two alignment projections 7e at one
end thereof, while having two interfitting recesses 7f and
two 'interfitting projections 7g at the other end thereof,
thereby stacking up and fix the plurality of cells 5 to a
predetermined height.
Next, after a desired number of the cells 5 are stacked
up, the other auxiliary terminal 8 is placed under one of the
electrode terminals 5a of the last topmost cell 5. An upper
insulating support 9 is then placed under one of the
electrode terminals 5a of the top cell 5. The upper
insulating support 9, electrode terminals 5a of the cells 5,
insulating mediators 7, auxiliary terminals 8 and the lower
insulating support 9 are all tightly fastened together by
means of the fasteners 10. More specifically, two bolts 10a
are inserted through the coaxial holes formed on the above
elements and then corresponding nuts 10b are screwed tightly
onto the bottom ends of the bolts 10a.
In accordance with the present invention, it is
possible to easily and rapidly fabricate battery modules that
meet various power demands for industrial instrument or an
electric car by connecting a predetermined number of cells in
series using detachable lead members.
Since the exposed lead members and electrode terminals
of the cells are covered with the insulating supports and
tightly fastened using the fasteners, a short circuit that
may occur in the cells due to an unintended drop of a
conductor onto the battery module can be effectively
prevented.
In addition, a cell protection circuit provided on each
cell or a safety device provided on each lead member can
protect the cells or the battery module against damage caused
by overcurrent, overcharge or overdischarge conditions.
We claim:
1. A secondary battery module, which comprises:
at least two cells 5 stacked to a predetermined height;
a lead member 6 at least partially bent to connect adjacent cells and form a single
series circuit through electrode terminals 5a of the cells 5 and having a safety
device 11 for cell protection provided on at least one portion thereof and safety
device peripherals 11a bent at a predetermined angle with respect to the axial line
of the lead member 6;
insulating mediators 7 having a hole 7a to guide bent portion of the lead member
6 and cylindrical bosses 7c to prevent a short circuit; and
at least two fasteners 10 to penetrate corresponding cylindrical bosses 7c of the
insulating mediators 7 in order to combine all components in a single body.
2. The secondary battery module as claimed in claim 1, optionally comprising two
auxiliary terminals 8 disposed respectively on one electrode terminal 5a of a top cell and
on one electrode terminal of a bottom cell to be connected to corresponding electrode
terminals 5a of the two outmost cells.
3. The secondary battery module as claimed in claim 2, optionally comprising two
insulating supports 9 for covering corresponding electrode terminals 5a of the two
outmost cells of the cells 5 and having a shape that partially exposes corresponding
auxiliary terminals 8.
4. The secondary battery module as claimed in claim 1, wherein the two fasteners
10 insulatedly fastening the insulating supports 9, lead members 6, insulating mediators
7, electrode terminals 5a and auxiliary terminals 8 together.
5. The secondary battery module as claimed in claim 1, wherein the hole 7a formed
on the corresponding insulating mediator 7 has a sloping surface 7b forming a
predetermined angle with respect to the axial line of the insulating mediator 7.
6. The secondary battery module as claimed in claim 1, wherein the cylindrical
bosses 7c of the insulating mediator 7 are formed at positions where the fasteners 10
penetrate in order to prevent a short circuit caused by the lead members 6 and the
fasteners 10.
7. The secondary battery module as claimed in claim 6, wherein at least one of the
cylindrical bosses 7c has a plurality of ribs 7cc formed in an outward radial direction so
that heat transferred through the electrode terminals 5a of the cells 5 can be smoothly
released out.
8. The secondary battery module as claimed in claim 1, wherein each insulating
mediator 7 has cut portions 7d and alignment projections 7e at one end, while having
interfitting recesses 7f and interfitting projections 7g at the other end, respectively on the
bottom and top portions thereof in order to stack up and fix the plurality of cells 5 to a
predetermined height.
9. The secondary battery module as claimed in claim 3, wherein each insulating
support 9 has cylindrical bosses 9a at positions where the fasteners 10 penetrate in order
to prevent an accidental short circuit caused by the electrode terminals 5a, auxiliary
terminals 8 and fasteners 10.
10. The secondary battery module as claimed in claim 3, wherein each insulating
support 9 has an opening cut 9b in a longitudinal direction at least one end thereof.
11. The secondary battery module as claimed in claim 1 or 4, wherein said fasteners
10 consist of pairs of bolts 10a and nuts 10b.
12. The secondary battery module as claimed in claim 1, wherein said insulating
mediators 7 are made of at least one material selected from a group consisting of PBT
(polybutylene terephthalate), ABS (acrylonitrile-butadiene-styrene) and PC
(polycarbonate) resin.
13. The secondary battery module as claimed in claim 3, wherein said insulating
supports 9 are made of at least one material selected from a group consisting of PBT
(polybutylene terephthalate), ABS (acrylonitrile-butadiene-styrene) and PC
(polycarbonate) resin.
14. The secondary battery module as claimed in claim 1, wherein each cell 5 includes
a cell protection circuit for electrical protection from overcurrent, overcharge or
overdischarge conditions.

The invention discloses a secondary battery module. The secondary battery module includes at least two cells (5) stacked to a predetermined height; a lead member (6) at least partially bent to connect adjacent cells and form a single series circuit through electrode terminals (5a) of the cells (5) and having a safety device (11) for cell protection provided on at least one portion thereof and safety device peripherals (11a) bent at a predetermined angle with respect to the axial line of the lead member (6); insulating mediators (7) having a hole (7a) to guide bent portion of the lead member (6) and
cylindrical bosses (7c) to prevent a short circuit; and at least two fasteners (10) to
penetrate corresponding cylindrical bosses (7c) of the insulating mediators (7) in order to
combine all components in a single body. The secondary battery module of the invention, makes it possible to easily and rapidly fabricate battery modules that meet various power demands for industrial instrument or an electric car by connecting a predetermined number of cells in series using detachable lead members.

Documents:

00222-kolnp-2006-abstract.pdf

00222-kolnp-2006-claims.pdf

00222-kolnp-2006-description complete.pdf

00222-kolnp-2006-drawings.pdf

00222-kolnp-2006-form 1.pdf

00222-kolnp-2006-form 3.pdf

00222-kolnp-2006-form 5.pdf

00222-kolnp-2006-international publication.pdf

00222-kolnp-2006-international search authority.pdf

00222-kolnp-2006-pct forms.pdf

00222-kolnp-2006-priority document.pdf

222-KOLNP-2006-FORM 27.pdf

222-KOLNP-2006-FORM-27.pdf

222-kolnp-2006-granted-abstract.pdf

222-kolnp-2006-granted-assignment.pdf

222-kolnp-2006-granted-claims.pdf

222-kolnp-2006-granted-correspondence.pdf

222-kolnp-2006-granted-description (complete).pdf

222-kolnp-2006-granted-drawings.pdf

222-kolnp-2006-granted-examination report.pdf

222-kolnp-2006-granted-form 1.pdf

222-kolnp-2006-granted-form 18.pdf

222-kolnp-2006-granted-form 3.pdf

222-kolnp-2006-granted-form 5.pdf

222-kolnp-2006-granted-gpa.pdf

222-kolnp-2006-granted-priority document.pdf

222-kolnp-2006-granted-reply to examination report.pdf

222-kolnp-2006-granted-specification.pdf

abstract-00222-kolnp-2006.jpg


Patent Number 238087
Indian Patent Application Number 222/KOLNP/2006
PG Journal Number 04/2010
Publication Date 22-Jan-2010
Grant Date 21-Jan-2010
Date of Filing 30-Jan-2006
Name of Patentee LG CHEM, LTD.
Applicant Address LG TWIN TOWER 20, YOIDO-DONG, YOUNGDUNGPO-GU, SEOUL
Inventors:
# Inventor's Name Inventor's Address
1 KIM JEE-HO 210-1305 JUNGO APARTMENT, WOLPYEONG-DONG, SEO-GU, DAEJEON 302-280
2 KIM HYUNG-CHAN 1-710 SEONGWONON APPERTMENT, YANGPYEONG-DONG 4-GA, YEONGDEUNGPO-GU, SEOUL 150-966
PCT International Classification Number H01M 2/10
PCT International Application Number PCT/KR2004/003276
PCT International Filing date 2004-12-14
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10-2003-0091736 2003-12-16 Republic of Korea