KR102441019B1 - Battery module with short-circuit protection structure - Google Patents

Abstract

The present invention discloses a battery module. A battery module according to the present invention includes a cell assembly including secondary batteries stacked in one direction; a sensing assembly mounted on at least one of a front surface and a rear surface of the cell assembly to which the electrode leads of the secondary batteries are exposed, and including a plurality of bus bars electrically connected to the electrode leads on the front surface; and a positive terminal and a negative terminal disposed on one side of the sensing assembly to be separated from the plurality of bus bars and electrically disconnected from the bus bars.

Description

Battery module with short-circuit protection structure

The present invention relates to a battery module, and more particularly, to a battery module capable of preventing an abnormal overcurrent from flowing due to an external short circuit before assembling in a distribution process or a battery pack unit.

A secondary battery refers to a battery that can be charged and discharged, unlike a primary battery that cannot be charged. In addition, secondary batteries are also in the spotlight as a power source for electric vehicles (EVs), hybrid electric vehicles (HEVs), etc., which are proposed as a solution to air pollution such as gasoline and diesel vehicles using fossil fuels. .

A plurality of secondary batteries may be electrically connected to increase capacity and output. The battery module may be referred to as an aggregate composed of a plurality of secondary batteries connected in series and/or in parallel as described above.

In particular, due to the need for high output and large capacity in medium and large devices such as electric vehicles, a battery pack implemented by electrically connecting a plurality of battery modules with the battery module as a basic unit is sometimes used.

Since these battery modules and battery packs are preferably manufactured as small as possible in size and weight, prismatic batteries, pouch-type batteries, etc. that can be stacked at high density and have a small weight to capacity are mainly used as unit cells of the battery module.

Meanwhile, a battery module or a battery pack has various issues related to safety. For example, the battery module has a risk of rapid performance degradation and explosion due to overcharging or overdischarging during operation, voltage imbalance per each secondary battery cell, swelling caused by an increase in withstand voltage during charging and discharging, and overcurrent. Therefore, a battery module or battery pack includes a battery protection circuit such as a PCM (Protection Circuit Module) or BMS (Battery Management System) with a cell balancing function as one component to prevent overdischarge, overcharge, and overcurrent as a way to secure stability. have.

Nevertheless, there is still the possibility that the battery module will have safety problems due to an external short circuit until it is assembled into an external device or battery pack.

In general, secondary batteries constituting the battery module are packaged inside the module housing and are not exposed to the outside, but the positive and negative terminals are exposed outside the module housing. For this reason, there is a risk that a metal object may contact the positive and negative terminals of the battery module and cause an external short circuit in the process of distributing the battery module or assembling the battery pack using the battery module. As such, when the positive and negative terminals are short-circuited by a metal object, an overcurrent may instantaneously flow in the battery module, thereby damaging or overheating the secondary batteries, which may cause a fire or explosion. Therefore, there is a need for a method for preventing an external short circuit in the process of distributing unit battery modules or assembling a battery pack using the unit battery modules.

Republic of Korea Patent Publication No. 10-2017-0078365 (2017.07.07) HL Green Power Co., Ltd.

The present invention was devised to solve the above problems, and it is to provide a battery module capable of preventing abnormal overcurrent from flowing due to an external short circuit before assembling in a distribution process or a battery pack unit.

According to an aspect of the present invention, there is provided a cell assembly comprising: a cell assembly including secondary batteries stacked and arranged in one direction; a sensing assembly mounted on at least one of a front surface and a rear surface of the cell assembly to which the electrode leads of the secondary batteries are exposed, and including a plurality of bus bars electrically connected to the electrode leads on the front surface; and a positive terminal and a negative terminal separated from the plurality of bus bars and electrically disconnected from the bus bars on one side of the sensing assembly.

A protective cover mounted on the sensing assembly to integrally cover the plurality of bus bars may be further included.

Each of the two bus bars selected from among the plurality of bus bars may further include an extension for terminal connection formed by extending one end to a predetermined position toward the positive terminal or the negative terminal.

The protective cover includes a main cover integrally covering the plurality of bus bars except for the terminal connection extension portion, and a temporary cover covering the terminal connection extension portion, wherein the temporary cover is detachable from the main cover. can be arranged for

Each of the positive terminal and the negative terminal is disposed on the upper end of the front portion of the sensing assembly and includes a terminal plate portion formed in a plate-like shape, and a bolt portion protruding vertically from the terminal plate portion, the terminal One surface of the connection extension part may be disposed on the same virtual plane as one surface of the terminal plate part.

At least a portion of the terminal connection extension portion may be provided to correspond to a width of the terminal plate portion.

The terminal connection extension portion may include a first section extending straight toward the terminal plate portion, a second section intersecting the first section and extending to correspond to at least a width of the terminal plate portion, and crossing the second section and crossing the terminal It may include a third section extending away from the plate portion.

The cell assembly further includes frames for stacking that accommodate at least one secondary battery inside in a rectangular frame shape, and are respectively erected and stacked in a horizontal direction, each of the stacking frames having a different lower end It may be provided with a support portion that protrudes further in the longitudinal direction, and a fastening member is inserted into a hole formed in the center region of the support portion of the frames for stacking so as to be integrally fixedly coupled.

The cell assembly further includes an end plate provided in the form of a plate-shaped body bent to surround the upper and both sides of the stacking frames, wherein the end plate has a lower end of a portion surrounding the both sides disposed on the outermost side It may be fixedly coupled to the support part of the frame for lamination.

The sensing assembly may further include a sensing board that provides a place where the plurality of bus bars, the positive terminal, and the negative terminal can be mounted, is supported by the support unit, and is detachably provided to the cell assembly. have.

In the sensing assembly, the plurality of bus bars, the positive terminal and the negative terminal may be disposed on a front surface of the sensing board, and a printed circuit board may be attached to a rear surface of the sensing board.

According to another aspect of the present invention, a battery pack including at least one or more of the above-described battery modules may be provided.

According to one aspect of the present invention, it is possible to prevent an abnormal overcurrent from flowing due to an external short circuit before assembling in a logistics distribution process or a battery pack unit, thereby providing a battery module with improved safety.

The battery module according to the present invention is provided in a structure separated from the secondary batteries so that the electrode terminals are deactivated except when necessary, so that it is possible to prevent a safety accident due to an external short circuit without an increase in space and cost or excessive design change compared to the prior art.

Other objects and advantages of the present invention may be understood by the following description, and will become more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the appended claims.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so the present invention is described in such drawings should not be construed as being limited only to
1 is a partially exploded perspective view of a battery module according to an embodiment of the present invention.
FIG. 2 is a front view of the sensing assembly of FIG. 1 ;
FIG. 3 is a rear view of the sensing assembly of FIG. 2 .
4 is a front view of the battery module before mounting the protective cover according to an embodiment of the present invention.
5 is a perspective view of the battery module before the protective cover of FIG. 4 is mounted.
6 is a perspective view of the battery module after mounting the protective cover according to an embodiment of the present invention.
7 is a front view of the battery module after the protective cover of FIG. 6 is mounted.
8 is a perspective view illustrating a front part of a battery module with a temporary cover removed according to an embodiment of the present invention.
9 and 10 are views illustrating a state before/after assembling a battery pack using battery modules according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Accordingly, the configuration shown in the embodiments and drawings described in the present specification is merely the most preferred embodiment of the present invention and does not represent all of the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.

1 is a partially exploded perspective view of a battery module according to an embodiment of the present invention.

Referring to FIG. 1 , the battery module 10 according to an embodiment of the present invention includes a cell assembly 100 , a sensing assembly 200 , a positive terminal 300a and a negative terminal 300b functioning as external terminals, and and a protective cover 400 .

First, looking at the cell assembly 100 constituting the battery module 10 of the present invention, the cell assembly 100 includes secondary batteries, stacking frames 120 , and an end plate 130 . .

As a secondary battery constituting the cell assembly 100 , pouch-type battery cells may be employed. The pouch-type battery cells may be stacked in one direction, for example, in a horizontal direction with a wide surface erected.

The stacking frame 120 is a component used for stacking pouch-type secondary batteries, and is configured to hold pouch-type secondary batteries lacking in mechanical rigidity to prevent their flow and to be stacked with each other to guide the assembly of secondary batteries. do

The stacking frame 120 may be replaced with various other terms such as a cartridge, and may be configured in the form of a square frame with an empty central portion. These stacking frames 120 may accommodate at least one pouch-type battery cell and may be respectively erected and stacked in a horizontal direction. In this case, the frames 120 for stacking may be coupled by a snap-fit method or the like.

In particular, each of the frames for stacking 120 according to the present embodiment includes a support portion 121 provided by having one of the four corners longer. 1 , when the stacking frames 120 are erected and stacked, the lower end may be more protruded in the longitudinal direction than other portions to form a step. Due to the step difference, the sensing assembly 200 to be described later may be placed and supported on the support part 121 .

In addition, a hole may be provided in the central region of the support part 121 . In the stacking frames 120 , the holes of the support parts 121 may be stacked to match left and right, for example, a fastening member such as a shoulder bolt B is inserted into the holes of the support parts 121 to be integrally formed. can be fixed. In this case, since the frames for stacking 120 are connected to one body by a snap-fit fastening as well as a shoulder bolt (B), fixability may be further improved.

The end plate 130 is a component serving to provide mechanical support for the stacking frames 120 and to protect them from external impacts and the like. The end plate 130 may be made of a metal material such as steel to ensure rigidity.

The end plate 130 according to the present embodiment has a bent plate shape, and includes an upper plate 131 and left and right side plates 132 extending in a vertical downward direction from both edges of the upper plate 131 . The frames for stacking 120 may be surrounded by the end plate 130 on the top and both sides.

For example, the end plate 130 and the frame for stacking 120 may be assembled in such a way that the end plate 130 is overlaid on the frames for stacking 120 . In this way, when the end plate 130 is overlaid on the stacking frame 120 , a fastening location between the end plate 130 and the stacking frame 120 can be reduced. That is, in the present embodiment, the lower ends of the left and right side plates 132 of the end plate 130, that is, the four lower corners 132a of the left and right side plates are the supporting parts 121 of the stacking frames 120 located at the outermost sides. ) can be fixedly coupled by bolting them. According to such a configuration, a spring-back phenomenon in which the left and right side plates 132 are opened in the end plate 130 can be prevented, and the end plate 130 and the stacking frame 120 are stably connected to each other. can be combined.

As shown in FIG. 1 , in this cell assembly 100 , the electrode leads 111 of the secondary batteries pass through a slit provided in the stacking frame 120 to be exposed to the front and rear surfaces of the stacking frames 120 . can

For reference, according to the shape of the pouch-type battery cell, the positive lead and the negative lead extending in opposite directions may be used as in the present embodiment, and in some cases, those extending in the same direction may be used.

The sensing assembly 200 is basically configured to be electrically connected to the electrode lead 111 , and may be mounted on at least one of the front and rear surfaces of the cell assembly 100 according to a position where the electrode lead 111 is exposed. Accordingly, in the present embodiment, the sensing assembly 200 may be mounted one at a time on the front and rear surfaces of the cell assembly 100 .

2 is a front view of the sensing assembly 200 of FIG. 1 , FIG. 3 is a rear view of the sensing assembly 200 of FIG. 2 , and FIG. 4 is a battery module before mounting the protective cover 400 according to an embodiment of the present invention. It is a front view of (10).

Referring to these drawings, the sensing assembly 200 may include a plurality of bus bars 210 , a sensing board 220 , and a printed circuit board 230 .

The bus bar 210 is a metal plate having the same conductivity as copper (CU), and electrode leads 111 are attached to the surface thereof by ultrasonic welding or the like. For example, the positive lead of any one secondary battery and the negative lead of the other may be attached to one bus bar 210 . By attaching the electrode leads 111 of the secondary batteries to each bus bar 210 in this pattern, the secondary batteries may be connected in series. These bus bars 210 may be mounted at a predetermined position on the sensing board 220 .

In particular, extension parts 211 for terminal connection may be further formed on the two bus bars 210 selected from among the bus bars 210 according to the present invention. In the present embodiment, the two bus bars 210 are the outermost bus bars 210 in the arrangement order, and include a positive bus bar 210a to which a positive lead is attached and a negative bus bar 210b to which a negative lead is attached. corresponds to this. The terminal connection extension 211 means a portion extending from the body of the positive bus bar 210a and the negative bus bar 210b to a position spaced apart from the electrode terminals 300a and 300b by a predetermined distance G. do.

Since the battery module 10 according to the present invention is provided in a state in which the bus bars 210 and the electrode terminals are separated in this way, in order to use the battery module 10, the bus bars 210, that is, the secondary batteries and the It is necessary to electrically connect the electrode terminals. A more detailed description thereof will be given later for convenience.

The sensing board 220 may be provided to be mounted on the front or rear surface of the cell assembly 100 and includes the plurality of bus bars 210 and components such as the positive terminal 300a and the negative terminal 300b. A component that provides a place for mounting.

The sensing board 220 may be injection-molded as an insulating material such as plastic. In this embodiment, the sensing board 220 has slits through which the electrode leads 111 can pass back and forth around the position where the bus bars 210 are to be mounted, and the support part 121 of the stacking frame 120 . Except for the stacking frame 120 may be manufactured in a size corresponding to the front or rear surfaces. In addition, the sensing board 220 may be attached to and detached from the cell assembly 100 in a snap-fit manner by providing a hook around the rim, and the lower end thereof may be supported by the support portions 121 of the stacking frames 120 . have.

The printed circuit board 230 may be a component including a processor chip for detecting electrical characteristics of secondary batteries, for example, a voltage of each secondary battery cell and controlling charging and discharging of the secondary battery cells. One end of the plurality of bus bars 210 may be connected to the printed circuit board 230 .

The printed circuit board 230 may be mounted on the rear surface of the sensing board 220 as shown in FIG. 3 . By disposing the printed circuit board 230 on the rear surface of the sensing board 220 as described above, it is possible to protect the printed circuit board 230 as well as connectivity with the bus bars 210 and the space of the sensing board 220 . The degree of freedom can be increased.

Meanwhile, the positive terminal 300a and the negative terminal 300b according to the present invention may be disposed on the front portion of the sensing assembly 200 , that is, on the sensing board 220 .

For example, as shown in FIGS. 4 and 5 , the positive terminal 300a and the negative terminal 300b may be mounted on both upper corners of the sensing board 220 , respectively. The positive terminal 300a and the negative terminal 300b have the same structure, a terminal plate portion 310 formed in a substantially rectangular plate shape, and a bolt portion 320 protruding vertically with respect to the terminal plate portion 310 . ) may be included.

In particular, the positive terminal 300a and the negative terminal 300b according to the present embodiment are located above the positive and negative bus bars 210a and 210b, but are separated from the bus bars 210 to form the bus bars 210 . and electrically disconnected.

Accordingly, the positive terminal 300a and the negative terminal 300b separated from the bus bars 210 in this way can be said to be in a state in which the function as an external electrode terminal of the battery module 10 is inactivated. The positive terminal 300a and the negative terminal 300b are only electrically connected to the positive bus bar 210a and the negative bus bar 210b by a separate electrical medium, respectively, as an external electrode terminal of the battery module 10. can function.

The protective cover 400 is a component that serves to protect the battery module 10 from the risk of an external short circuit by covering the plurality of bus bars 210 and the electrode leads 111 so as not to be exposed to the outside. The protective cover 400 may be provided so that it can be mounted one by one on the front and rear surfaces of the sensing assembly 200 in which the bus bars 210 are located.

5 and 6 and 7 are compared, it can be seen that all the bus bars 210 positioned under the positive terminal 300a and the negative terminal 300b are covered by the protective cover 400 . Therefore, in the battery module 10 according to the present invention, all areas of the battery module 10 that can conduct electricity are insulated by the protective cover 400 , and the positive terminal 300a and the negative terminal 300b exposed to the outside are the bus bars 210 . ) and the function as an external terminal is inactive, so even if a metal object comes into contact with it, no current flows.

Since the battery module 10 according to the present invention is provided in the form shown in FIG. 6 until assembling in the transportation process or the battery pack unit, abnormal overcurrent due to an external short circuit can be prevented from flowing, so that a safety accident may occur This is very low.

Meanwhile, the protective cover 400 according to an embodiment of the present invention may include a main cover 410 and a temporary cover 420 as shown in FIGS. 7 to 8 .

The main cover 410 is a part integrally covering the bus bars 210 except for the extension part 211 for terminal connection, and is always attached to the sensing assembly 200 except during maintenance of the battery module 10 . exist in the state

The temporary cover 420 is a part that covers the extension part 211 for terminal connection, and there are two, one each on the positive terminal 300a and the negative terminal 300b side, and may be configured to be detachable from the main cover 410 . .

As shown in FIG. 8 , when the temporary cover 420 is removed from the main cover 410 , the terminal connection extension 211 may be exposed to the outside. This temporary cover 420 may be removed from the main cover 410 immediately before connecting the unit battery module 10 to an external device or immediately before assembling the unit battery module 10 as a battery pack unit by connecting several unit battery modules 10 . have.

With reference again to FIGS. 2 to 5, the above-described extension part 211 for terminal connection according to an embodiment of the present invention will be described with reinforcement.

In this embodiment, the secondary batteries are connected in series, so that in the arrangement order of the secondary batteries, the rightmost bus bar 210 is connected to the negative lead, and the leftmost bus bar 210 is connected to the positive lead. . As such, an extension 211 for terminal connection is further provided on the two bus bars 210 located at the outermost sides. In order for the positive terminal 300a and the negative terminal 300b to be activated as external terminals, for example, as shown in FIG. 10 , they must be electrically connected to the extension part 211 for connecting these terminals by a separate conductor such as the inter-bus bar 20 . do.

At least a portion of the terminal connection extension 211 according to the present embodiment corresponds to the width of the terminal plate portion 310 , and the thickness thereof may be manufactured to substantially match the thickness of the terminal plate portion 310 . In this case, the extension part 211 for terminal connection and the terminal plate part 310 have the same degree of protrusion with respect to the sensing board 220 , so that one surface of the extension part 211 for terminal connection and one surface of the terminal plate part 310 are the same. These can be side by side with each other. That is, one surface of the extension part 211 for terminal connection and one surface of the terminal plate part 310 may be placed on the same virtual plane.

As described above, since there is almost no difference in height and width between the terminal connection extension 211 and the terminal plate 310, it is possible to secure contact reliability when electrically connecting them by covering them with the inter-bus bar 20 later.

In addition, the terminal connection extension 211 according to the present embodiment includes a first section 211a extending straight toward the terminal plate section 310 , crossing the first section 211a and at least the terminal plate section It may include a second section 211b extending to correspond to the width of the 310 , and a third section 211c crossing the second section 211b and extending away from the terminal plate part 310 . .

The first section 211a is a portion extending from the body of the positive bus bar 210 and the negative bus bar 210 to a position spaced apart from the terminal plate part 310 by a predetermined distance G. The second section 211b is a portion extending in a direction crossing the first section 211a, that is, in a direction corresponding to the width of the terminal plate. Since the terminal connection extension 211 has such a second section 211b, contact with the inter-bus bar 20 may be improved later.

In addition, as in the present embodiment, in the structure in which the printed circuit board 230 is manufactured to have a size smaller than the arrangement area of the bus bars 210 and is attached to the upper central upper region of the rear surface of the sensing board 220, the second section ( 211b) may be a bypass path through which the positive and negative bus bars 210 can be connected to the printed circuit board 230 . And the third section 211c extends downward from the terminal plate part 310 and the end part 211d is bent toward the rear surface of the sensing board 220 to be connected to the printed circuit board 230. can be

9 and 10 are views illustrating a state before/after assembling a battery pack using the battery modules 10 according to an embodiment of the present invention.

Next, an assembly process for electrically connecting the above-described battery modules 10 will be briefly described with reference to FIGS. 9 and 10 .

Since the unit battery module 10 is initially provided in a state in which the positive terminal 300a and the negative terminal 300b are inactivated as external terminals, as shown in FIG. 6 , to configure the battery pack, the positive terminal 300a and It is necessary to activate the negative terminal 300b to function as an external terminal of each battery module 10 .

To this end, first, the unit battery modules 10 are brought into close contact with each other, and then the temporary cover 420 is removed from the unit battery module 10 . At this time, when the temporary cover 420 is removed as shown in FIG. 8 , the bus bars 210 for terminal connection may be exposed under the positive terminal 300a and the negative terminal 300b.

Then, the negative terminal 300b of the left side battery module 10 and the positive terminal 300a of the right side battery module 10 are electrically connected using the inter-bus bar 20 . Here, the inter-bus bar 20 may be a metal rod-type conductor capable of passing a high current.

In particular, the inter-bus bar 20 includes a negative terminal 300b of the left side battery module 10a, a positive terminal 300a of the right side battery module 10b, and the negative terminal 300b and the positive terminal 300a. ) may be installed so as to be in contact with all of the terminal connection extensions 211 adjacent to each other. Accordingly, the portion that is disconnected from each battery module 10 by the inter-bus bar 20 and the positive terminal 300a and the negative terminal 300b of the two battery modules 10 may be electrically energized.

The positive terminal 300a and the terminal connection extension 211 of the left battery module 10a, and the negative terminal 300b and the terminal connection extension 211 of the right battery module 10b are inter-bus bars It may be connected by a bus bar 30 for terminals having a structure similar to that of (20).

In this embodiment, an example in which two unit battery modules 10 are connected is disclosed, but the battery pack according to the present invention uses the above-described inter-bus bar 20 to connect as many unit battery modules 10 as necessary. It will be obvious that it can be configured by connecting.

On the other hand, the battery pack according to the present invention, in addition to these battery modules 10, a pack case for accommodating these battery modules 10, various devices for controlling the charging and discharging of the battery modules 10, such as BMS, current A sensor, a fuse, etc. may be further included.

Of course, the battery pack according to the present invention may be applied to a vehicle such as an electric vehicle or a hybrid vehicle or an ESS.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

On the other hand, when terms indicating directions such as up, down, left, right, front, and back are used in the present specification, these terms are only for convenience of explanation, and depending on the location of the object or the position of the observer, etc. It will be apparent to those skilled in the art that this may vary.

10: battery module 100: cell assembly
111: electrode lead 120: frame for lamination
121: support 130: end plate
200: sensing assembly 210: busbar
211: extension for terminal connection 220: sensing board
230: printed circuit board 300a, 300b: positive terminal, negative terminal
310: terminal plate portion 320: bolt portion
400: protective cover 410: main cover
420: temporary cover

Claims (12)

a cell assembly including secondary batteries stacked in one direction;
a sensing assembly mounted on at least one of a front surface and a rear surface of the cell assembly to which the electrode leads of the secondary batteries are exposed, and including a plurality of bus bars electrically connected to the electrode leads on the front surface; and
a positive terminal and a negative terminal separated from the plurality of bus bars on one side of the sensing assembly and spaced apart from the bus bars to be electrically disconnected from the bus bars;
Two bus bars selected from among the plurality of bus bars each have an extension part for terminal connection that has one end extending to a position adjacent to the positive terminal or the negative terminal at a predetermined distance,
The battery module, characterized in that the terminal connection extension portion is configured to be non-contact with the corresponding positive terminal or the negative terminal . According to claim 1,
The battery module further comprising a protective cover mounted on the sensing assembly to cover the plurality of bus bars integrally. delete 3. The method of claim 2,
The protective cover is
and a main cover integrally covering the plurality of bus bars except for the extension for terminal connection, and a temporary cover for covering the extension for terminal connection,
The temporary cover is a battery module, characterized in that provided detachably from the main cover. 3. The method of claim 2,
The positive terminal and the negative terminal are each
It is disposed on the upper end of the front part of the sensing assembly and includes a terminal plate part formed in a plate shape, and a bolt part protruding vertically with respect to the terminal plate part,
The battery module, characterized in that one surface of the terminal connection extension part is disposed on the same virtual plane as one surface of the terminal plate part. 6. The method of claim 5,
The terminal connection extension portion, at least a portion of the battery module, characterized in that provided to correspond to the width of the terminal plate portion. 7. The method of claim 6,
The extension part for connecting the terminal,
A first section extending straight toward the terminal plate portion, a second section intersecting the first section and extending to correspond to at least a width of the terminal plate section, crossing the second section and extending away from the terminal plate section A battery module comprising a third section. The method of claim 1,
The cell assembly is
At least one secondary battery is accommodated inside in the form of a square frame, and further comprising frames for stacking which are respectively erected and stacked in a horizontal direction,
Each of the frames for lamination has a support portion provided with a lower end protruding more in the longitudinal direction than other portions, and a fastening member is inserted into a hole formed in the center region of the support portion of the frames for stacking to be integrally fixedly coupled A battery module, characterized in that. 9. The method of claim 8,
The cell assembly is
Further comprising an end plate provided in the form of a plate-shaped body bent so as to surround the upper and both sides of the frames for lamination,
The end plate is a battery module, characterized in that the lower end of the portion surrounding the both sides is fixedly coupled to the support portion of the stacking frame disposed on the outermost side. 9. The method of claim 8,
The sensing assembly,
The battery module further comprising: a sensing board that provides a place for the plurality of bus bars, the positive terminal, and the negative terminal to be mounted, is supported by the support part, and is detachably provided in the cell assembly . 11. The method of claim 10,
The sensing assembly,
The plurality of bus bars, the positive terminal and the negative terminal are disposed on the front surface of the sensing board, and a printed circuit board is attached to the rear surface of the sensing board. 12. A battery pack comprising at least one battery module according to any one of claims 1, 2, and 4 to 11.

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