KR101281811B1 - Battery Pack Having Improved Structure Stability - Google Patents

Abstract

The present invention relates to a cell module laminate having a structure in which a plurality of cell modules having a structure in which a battery cell is mounted on a cartridge are stacked one above the other, a lower plate supporting a lower end of the cell module laminate, A battery module including a top plate for fixing the uppermost cartridge of the stack, and a voltage detection assembly for detecting a voltage of the battery cells; A box-shaped pack case to which the battery module is mounted; A pack cover coupled to the pack case; And a reinforcing member coupled to the pack case while surrounding the upper portion of the battery module so that the battery module can be stably mounted on the pack case. It provides a battery pack comprising a.

Description

Battery Pack Having Improved Structure Stability}

The present invention relates to a battery pack having improved structural stability, and specifically, a cell module stack having a structure in which a plurality of cell modules having a structure in which a battery cell is mounted on a cartridge, and stacked up and down, A battery module including a bottom plate supporting a bottom, a top plate fixing a top cartridge of a cell module stack positioned on the bottom plate, and a voltage detection assembly for detecting a voltage of the battery cells; A box-shaped pack case to which the battery module is mounted; A pack cover coupled to the pack case; And a reinforcing member coupled to the pack case while surrounding the upper portion of the battery module so that the battery module can be stably mounted on the pack case.

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been widely used as energy sources for wireless mobile devices. In addition, the secondary battery is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle that has been proposed as a solution for air pollution of existing gasoline and diesel vehicles using fossil fuel. It is also drawing attention as a power source of (Plug-In HEV) or a power source of a power storage device.

In a small mobile device, one or a few battery cells are used per device, while a large and medium-sized device such as an automobile uses a battery module in which a plurality of battery cells are electrically connected to each other due to the necessity of a high output large capacity.

Since the battery module is preferably manufactured in a small size and a weight as much as possible, a prismatic battery, a pouch-shaped battery, and the like, which can be charged with a high degree of integration and have a small weight to capacity ratio, are mainly used as battery cells of a middle- or large-sized battery module. Particularly, a pouch-shaped battery using an aluminum laminate sheet or the like as an exterior member has recently attracted a great deal of attention due to its advantages such as low weight and low manufacturing cost.

On the other hand, since the battery module has a structure in which a plurality of battery cells are combined, when some battery cells are overvoltage, overcurrent, or overheating, a large amount of gas is generated due to decomposition of the electrolyte and a so-called swelling phenomenon in which the case swells appears. This swelling phenomenon causes high pressure inside the sealed case, and further promotes decomposition of the electrolyte and may cause an explosion. In addition, due to the gas generated, the center portion of the battery case swells, causing deformation of the battery, and thus there is a problem in that a short circuit occurs.

In this case, there is a need for a structure for preventing the overall size of the battery pack from increasing when swelling occurs. In addition, as the battery pack is used as a power source for automobiles due to the expansion of the application range of the secondary battery, structural stability is required even when a strong shock or vibration is applied to the battery pack.

In addition, in the case of configuring a battery module using a plurality of battery cells or a battery module using a plurality of cell modules consisting of a predetermined number of battery cells, in general, many members for mechanical fastening and electrical connection thereof Since there is a need for space for joining, welding, and the like, there is a problem in that the overall size of the battery system is increased.

Therefore, there is a high need for a battery pack that solves the above problems and improves structural stability without increasing the overall volume.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the prior art and the technical problems required from the past.

Specifically, an object of the present invention by using a fixing member for stably fixing the battery module in the pack case, even if the swelling of the battery cells to suppress the increase in the overall volume of the battery pack to improve the battery pack structural stability To provide.

Still another object of the present invention is to provide a battery pack capable of assembling the fixing member and the control unit and maintaining the overall size constant by a simple assembly method without using a plurality of fastening members.

According to an aspect of the present invention, there is provided a battery pack comprising:

A cell module laminate having a structure in which a plurality of cell modules having a structure in which a battery cell is mounted on a cartridge are stacked on top and bottom, a lower plate supporting a lower end of the cell module laminate, A battery module including a top plate for fixing the top cartridge, and a voltage detection assembly for detecting a voltage of the battery cells;

A box-shaped pack case to which the battery module is mounted;

A pack cover coupled to the pack case; And

A reinforcing member coupled to the pack case while surrounding the upper portion of the battery module so that the battery module can be stably mounted on the pack case;

As shown in FIG.

Accordingly, the battery pack according to the present invention can prevent the battery module from being separated from the pack case even when a strong shock or vibration is applied to the battery pack from the outside due to the specific structure as described above.

In addition, since the reinforcing member is coupled to the pack case while surrounding the upper portion of the battery module, the battery module can be stably fixed to the pack case and the deformation of the battery module due to the volume expansion of the battery cell can be suppressed.

The number or mounting positions of the reinforcing members is not particularly limited as long as the battery module can be stably fixed to the pack case. For example, one reinforcing member may have a structure surrounding the upper part or the whole of the battery module. In addition, one reinforcing member may be configured to surround the center of the upper portion of the battery module, or two or more reinforcing members to surround both sides of the battery module.

This reinforcing member is preferably made of a metal band ("strap") shaped plate material corresponding to the structure of the upper surface of the battery module, it is connected to the pack case by a simple assembly without a separate connection equipment to securely fix the battery module You can.

The reinforcing member is not particularly limited as long as it has a predetermined mechanical rigidity. For example, the reinforcing member may be made of a metal material, a polymer resin material, or a polymer composite material.

In particular, when the reinforcing member is made of a flexible metallic material with shrinkage expansion against heat, it is preferable because the reinforcing member is not broken due to thermal expansion, or the fixing force of the reinforcing member is not reduced due to thermal contraction.

The top plate and the bottom plate is made of a rectangular hollow planar structure, for example, may be a metal plate.

Since the heat insulating member is mounted on the top of the hollow structure in the structure, the heat insulating member blocks direct contact between the pack case and the battery module to prevent heat generated from the outside of the battery pack, such as external radiant heat, from being transferred to the battery module. Can be.

For reference, the heat insulating member is not particularly limited as long as it is a material having excellent heat insulating property, and preferably may be made of a porous polymer resin, for example, styrofoam.

In addition, the shape of the upper plate and the lower plate is not limited to the rectangle and may be variously modified according to the shape of the battery module.

In one preferred example, the four corners of the upper plate and the lower plate are formed with through holes into which fastening members for fixing the cell module stack are inserted, so that even when a strong shock or vibration is applied from the outside, the cell module is stacked. As the sieve is separated from the upper plate and the lower plate to prevent breakage, it is possible to further improve the structural stability of the battery module.

As the fastening member fastened to the through hole in the structure, for example, a bolt and a nut may be used.

A control unit is located between the top plate and the pack cover, and the control unit may be a battery management system (BMS).

In the above structure, the battery pack according to the present invention has a structure in which a reinforcing member passes between the control unit and the upper plate, so that the battery module pressurizes the control unit even if the battery cells of the battery module expand due to abnormal operation or long-term use. This can prevent malfunction or shutdown.

In some cases, the fastening groove of the nut or bolt is formed on the upper portion of the reinforcing member, it is possible to stably fix the electrical equipment such as BMS to the reinforcing member.

The battery cell may be a pouch type battery cell in which an electrode assembly is built in a case of a laminate sheet including a resin layer and a metal layer.

The battery module according to the present invention has a compact structure as a whole and can achieve structurally stable mechanical fastening and electrical connection without using a large number of members. In addition, by configuring a battery module with predetermined units, for example, four, six, eight, ten battery cells or cell modules, the battery module can be effectively mounted in a limited space as necessary. Can be.

The voltage detection assembly,

(a) a block case made of an electrically insulating material and mounted on a front surface or a back surface of a battery module corresponding to an electrode terminal connection portion of the battery cells;

(b) conductive sensing units respectively connected to the voltage detecting terminals located at one end of the bus bar electrically connected to the electrode terminal connecting parts of the battery cells; And

(c) a connector for transmitting the detection voltage of the conductive sensing units to the control unit;

As shown in FIG.

The block case includes mounting grooves having a structure that is open in the front direction to mount the conductive sensing portions at positions corresponding to the voltage detecting terminals of the bus bar, and the conductive sensing portions are disposed in the mounting grooves of the block case. It is structured to be connected to the voltage detecting terminal of the bus bar in the attached state.

Therefore, the voltage detecting assembly according to the present invention has a structure in which the conductive sensing parts are connected to the voltage detecting terminal of the bus bar in a state in which the conductive sensing parts are mounted in the mounting grooves of the block case. It has a structure that can detect voltage.

In addition, since the member for detecting the voltage of the battery cells is composed of one modular assembly structure, the voltage detection assembly can be easily mounted on the front or rear of the battery module.

Since the conductive sensing units are fixed to the block case in the same row, the voltage detecting assembly according to the present invention can be easily expanded according to the use environment of the battery module such as voltage and current. The control unit may be, for example, BMS, but is not limited thereto.

In one preferred embodiment, the conductive sensing portion is made of a receptacle type structure that is fitted to the terminal for detecting the voltage of the bus bar from the front surface, so that the conductive sensing portion and the voltage detecting element can be easily assembled even when an external impact is applied. The terminal can maintain a stable electrical connection.

The bus bar may include, for example, a plate-shaped body electrically connected to an electrode terminal coupling portion of a battery cell, and a voltage detecting terminal formed at one end of the plate-shaped body. Further, the bus bar has a shape protruding from the front surface, so that coupling with the block case is easily achieved.

The cartridge,

A rectangular structure corresponding to the battery cell so that the battery cell can be mounted thereon, and a through hole for radiating heat is formed at the central portion thereof;

Fasteners into which fastening members for fixing the cell module stacks are inserted are formed at four corners;

In the front surface of the cartridge, the coupling portion of the structure that can be fastened in an assembly manner to the mounting insulation member for mounting the voltage detection assembly and the bus bar, so that the voltage detection assembly can be stably connected to the bus bar It may be made of.

For example, the bus bar may be a structure that is heat-sealed to the injection molding of the mounting insulating member.

The mounting insulating member has a rectangular parallelepiped structure having a size corresponding to the front surface of the cell module stack, and a rear surface of the cartridge is formed with a cartridge coupling groove into which the front end portion of the cartridge can be inserted and coupled. It may be a structure in which the electrode terminal through grooves are formed on both sides so that the electrode terminal connecting portion is introduced from the rear side and exposed.

On the front surface of the mounting insulating member, mounting portions for external input / output terminal connecting portions for stably mounting the external input / output terminal connecting portions of the bus bars are formed at both ends, and a mounting portion for voltage detecting assembly for stably mounting the voltage detecting assembly. It may be a structure formed in the central portion.

On the other hand, the four corners of the upper plate may be a structure that is mounted 'b' shaped frame member for coupling with the pack cover and the pack case.

In detail, the frame member may be provided with first through holes formed at portions of both sides of the pack cover, and fasteners for engaging with second through holes of the pack case formed at portions corresponding to the first through holes.

Medium and large battery packs according to the present invention can be manufactured by combining the battery modules according to the desired output and capacity, considering the mounting efficiency, structural stability, and the like as described above, electric vehicles, hybrid electric vehicles, plug-in hybrid It can be used suitably as a power supply of an electric vehicle or an electric power storage device.

Particularly, the battery pack of the above structure can be used as an uninterruptible power supply (UPS) that is mounted on a communication company repeater and supplies power in case of emergency, because the battery cells are stacked vertically and the whole size is compact.

As described above, the battery pack according to the present invention is composed of an assembly structure in which the reinforcing member is coupled to the pack case while surrounding the upper portion of the battery module, even when a strong shock or vibration is applied to the battery pack from the outside. By preventing the module from being separated from the pack case, it is possible to greatly improve the structural stability of the battery pack.

In addition, the battery pack according to the present invention can be fixed to the electrical components mounted inside the battery pack, such as a control unit in addition to the battery module using a reinforcing member.

Furthermore, the battery pack according to the present invention may not increase the total volume of the battery pack even when swelling of the battery cells occurs.

1 is a perspective view of a battery cell mounted to a battery module;
Fig. 2 is an exploded schematic view of Fig. 1; Fig.
3 is a perspective view of a voltage detection assembly according to one embodiment of the present invention;
4 is a perspective view of the conductive sensing unit of FIG. 3;
5 is a perspective view of a mounting insulating member to which the voltage detection assembly of FIG. 3 is mounted;
FIG. 6 is a perspective view of bus bars mounted to the mounting insulating member of FIG. 5; FIG.
7 is a perspective view of a battery module according to an embodiment of the present invention;
8 is a perspective view illustrating a structure in which the battery module of FIG. 7 excludes a cell module stack and a controller;
9 is a perspective view illustrating a stacked structure of cartridges in the battery module of FIG. 7;
10 is an exploded perspective view of a battery pack according to an embodiment of the present invention;
11 is a vertical sectional schematic diagram showing a mounting state of a reinforcing member according to one embodiment of the present invention;
12 is a perspective view showing a mounting state of the reinforcing member according to another embodiment of the present invention;
FIG. 13 is a perspective view illustrating that the reinforcing member and the controller are mounted to the structure of FIG. 12; FIG.
FIG. 14 is a perspective view of a battery pack showing that the pack case and the pack cover of FIG. 13 are combined.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

1 is a perspective view of an exemplary battery cell mounted on a unit module of the present invention, and FIG. 2 is an exploded schematic view of FIG.

Referring to these figures, the pouch-shaped battery cell 200 includes an electrode assembly including an anode, a cathode, and a separator disposed between the anode and cathode taps 220 and 230 And two electrode terminals 222 and 232, which are electrically connected to each other, are sealed to be exposed to the outside.

The battery case 100 includes a case body 140 including a concave shaped storage portion 142 on which the electrode assembly 210 can be seated and a lid 150 integrally connected to the body 140 have.

The electrode assembly 210 having the stacked or stacked / folded structure has a plurality of anode tabs 220 and a plurality of anode tabs 230 welded to each other and coupled to the electrode terminals 222 and 232. It is also possible to prevent short-circuiting between the heat sealer and the electrode terminals 222 and 232 when the ingress 144 of the case body 140 and the cover 150 are thermally fused by the heat sealer, The insulating film 240 is attached to the upper and lower surfaces of the electrode terminals 222 and 232 so as to secure the sealing property between the battery case 100 and the battery case 100. [

The case body 140 and the cover 150 are constituted by the outer resin layer 110, the barrier metal layer 120 and the inner resin layer 130. The inner resin layer 130 is formed on the outer surface of the case body 140 And heat and pressure from a heat sealer (not shown) applied to the outer surface of the cover 150.

A sealing portion is formed by thermally fusing the contact portion of the cover 144 with the residue 144 of the case body 140 while the electrode assembly 210 impregnated with the electrolyte is seated in the housing portion 142.

FIG. 3 is a perspective view of a voltage detection assembly according to an embodiment of the present invention, and FIG. 4 is a perspective view of the conductive sensing unit of FIG. 3.

6 and 7, the voltage detection assembly 300 includes a block case 10 mounted on a front surface of a battery module 400 corresponding to an electrode terminal connection portion of battery cells; Conductive sensing portions 20 connected to a voltage detecting terminal 44 located at one end of a bus bar 40a electrically connected to an electrode terminal connecting portion (not shown) of the battery cells; And a connector 30 for transmitting the detection voltage of the conductive sensing units 20 to the control unit.

The block case 10 includes mounting grooves 12 having a structure opened in the front direction so that the conductive sensing portions 20 are formed at positions corresponding to the voltage detecting terminals 44 of the bus bar 40a And the conductive sensing portions 20 are connected to the voltage detecting terminal 44 of the bus bar 40a in a state where the conductive sensing portions 20 are mounted on the mounting grooves 12 of the block case 10.

The mounting recesses 12 of the block case 10 are formed independently for each conductive sensing unit 20. The conductive sensing units 20 are connected to the voltage detection terminal 44 of the bus bar 40a from the front side, Like structure which is fitted in the receptacle-type structure.

More specifically, the conductive sensing portion 20 includes a receptacle portion 22 and a power supply wire 24 which are fitted to the voltage detecting terminal 44 of the bus bar 40a. And forms a perpendicular connection structure to the dedicated wire (24).

Each of the conductive sensing parts 20 is connected to a connector by a wire 24 and the wires 24 are wrapped with an insulating tape 32 for insulation from the outside.

In the front of the block case 10, clamp-like fasteners 14 protrude in the front direction to stably fix the wires 24.

At both ends of the block case 10, fastening protrusions 16 for engaging with the slits of the mounting insulating member 50 protrude laterally, and on the upper portion of the fastening protrusions 16, And a sliding protrusion 18 which slides on the inner surface of the seating portion 54 for voltage detection assembly and protrudes laterally.

FIG. 5 schematically shows a perspective view of a mounting insulation member to which the voltage detection assembly of FIG. 3 is mounted, and FIG. 6 schematically shows a perspective view of a bus bar mounted to the mounting insulation member of FIG. 5. have.

Referring to these drawings together with FIG. 7, the bus bar 40a includes a plate-shaped body 42 electrically connected to an electrode terminal coupling portion of a battery cell, and a voltage detecting terminal formed at one end of the plate-shaped body 42. It consists of (44).

The bus bar 40b connected to the positive external input / output terminal of the bus bars is connected to the first external input / output terminal connection portion 40b formed at the opposite end of the voltage detection terminal 44 and bent to protrude from the side surface of the main body 42. [ (46).

A narrow section of indentation 48 having a vertical cross-sectional area of 40% of the vertical cross-sectional area of the main body 42 is provided between the main body 42 and the first external input / output terminal connection portion 46 to induce a short- Respectively.

The bus bar 40c connected to the negative external input / output terminal of the bus bars is formed at the opposite end of the voltage detection terminal 44 and has a side surface of the main body 42 and a second external input / And a terminal connection portion 43.

The first external input / output terminal connecting portion 46 and the second external input / output terminal connecting portion 43 are formed with fastening grooves 45 which can be coupled with external input / output terminals.

The mounting insulating member 50 has a rectangular parallelepiped structure having a size corresponding to the front surface of the cell module laminate body 70 and a cartridge engaging groove 51 into which a front end of the cartridge is inserted can be formed at the rear side And electrode terminal through grooves 52 are formed on both sides of the front surface so that the electrode terminal connection portion of the battery cell is introduced from the rear and exposed.

In addition, a mounting portion 53 for external input / output terminal connection portions is formed at both ends of the front surface of the insulating member 50 for mounting, thereby stably mounting the external input / output terminal connection portions 44 of the bus bars 40a 40b and 40c. The mounting part 54 for voltage detection assembly is formed in the center part, and the voltage detection assembly 300 is mounted stably.

The electrode terminal connection portion (not shown) of the battery cell exposed to the front face through the electrode terminal through-hole 52 is provided with an electrode terminal through-hole 52 And is electrically connected to the upper end surface of the bus bar 40a mounted on the bus bar 40a.

FIG. 7 is a perspective view schematically showing a battery module according to an embodiment of the present invention, and FIG. 8 is a perspective view schematically showing a structure excluding a cell module stack and a controller in the battery module of FIG. 7. It is. 9 is a perspective view schematically showing the stacked structure of the cartridges in the battery module of FIG.

Referring to these drawings together with FIG. 6, the battery module 400 includes a voltage detection assembly 300; A cell module stack 70 having a structure in which a plurality of cell modules having a structure in which a battery cell is mounted in a cartridge is stacked up and down; A bottom plate 80 supporting the bottom of the cell module stack 70; And a top plate 90 that secures the top cartridge 82 of the cell module stack 70 located on the bottom plate 80.

The cartridge 82 has a rectangular structure corresponding to the battery cell so that the battery cell can be mounted, and a through hole 84 for radiating heat is formed at a central portion thereof, and the four corners of the cell module stack 70 are fixed. Through holes 86 through which fastening members (not shown) are inserted are formed at four corners.

On the front surface of the cartridge 82 is a coupling portion 88 having a structure in which the mounting insulation member 50 for mounting the voltage detection assembly 300 and the bus bars 40a, 40b, and 40c can be fastened in an assembled manner. The voltage detecting assembly 300 is stably connected to the voltage detecting terminals 44 of the bus bars 40a, 40b, and 40c.

In addition, the battery module 400 mounts the battery cell in the cartridge 82 of the cell module, and stacks a plurality of such cartridges 82 on the bottom plate 80, and then the top of the top cartridge 82 It consists of a structure for coupling the plate (90).

Referring to FIG. 8, the upper plate 90 and the lower plate 80 are formed in a rectangular shape having a planar hollow structure, and a heat insulating member 92 is mounted at an upper end of the hollow structure.

Through holes 81 and 91 are formed at four corners of the upper plate 90 and the lower plate 80, and fastening members (not shown) are coupled to the through holes 81 and 91.

FIG. 10 is a perspective view schematically illustrating an exploded battery pack according to one embodiment of the present invention, and FIG. 11 is a vertical cross-sectional view showing a mounting state of a reinforcing member according to an embodiment of the present invention. It is.

Referring to these drawings together with FIG. 8, the battery pack 900 may include a battery module 400, a box type pack case 500b in which the battery module 400 is mounted, and a pack cover 500a coupled to the pack case 500b. ) And a reinforcing member 600.

Since the reinforcing member 600 is coupled to the pack case 500b while surrounding the upper portion of the battery module 400, the reinforcing member 600 is stably mounted to the pack case 500b.

In addition, the reinforcing member 600 is made of a strip-shaped plate material corresponding to the upper surface structure of the battery module 400, it is made of a structure that passes between the control unit 700 and the top plate 90.

The reinforcing member 600 may be coupled to the pack case 500b in various ways. For example, fastening grooves are formed in the reinforcing member 600 and the pack case 500b, respectively, and the fastening member is provided therein. The fastening groove is formed in the reinforcement member 600 or the pack case 500b, and the fastener is formed in the pack case 500b or the reinforcement member 600. This may be done, or the reinforcing member 600 and the pack case 500b may be combined by an adhesive.

Meanwhile, 'a' shaped frame members 95 for coupling with the pack cover 500a and the pack case 500b are mounted at four corners of the top plate 90.

In addition, the first through holes 510a formed at portions of both sides of the pack cover 500a and the second through holes 510b of the pack case 500b formed at portions corresponding to the first through holes 510a. Fasteners 96 are formed in the frame member 95.

12 is a perspective view schematically showing the mounting state of the reinforcing member according to another embodiment of the present invention, Figure 13 is a perspective view showing that the reinforcing member and the control unit is mounted on the structure of FIG. 14 is a perspective view of a battery pack showing that the pack case and the pack cover are combined in FIG.

Referring to these drawings, the top plate 90a is coupled to the battery module 400 mounted on the box-shaped pack case 500d, and the reinforcing members 600a, 600b, and 600c are formed on the top plate 90a. It wraps around both ends and a center part, and is bonded by welding with the pack case 500d.

In addition, the pack cover 500c has a box-shaped structure for accommodating the battery module 400a therein, and a space in which the controller 700 is mounted is formed between the pack cover 500c and the top plate 90a. do.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Claims (23)

A cell module laminate having a structure in which a plurality of cell modules having a structure in which a battery cell is mounted on a cartridge are stacked on top and bottom, a lower plate supporting a lower end of the cell module laminate, A battery module including a top plate for fixing the top cartridge, and a voltage detection assembly for detecting a voltage of the battery cells;
A box-shaped pack case to which the battery module is mounted;
A pack cover coupled to the pack case; And
A reinforcing member which is coupled to the pack case while surrounding the upper portion of the battery module so that the battery module can be stably mounted on the pack case and is a strip-shaped plate material corresponding to the top surface structure of the battery module;
Battery pack comprising a. The battery pack according to claim 1, wherein the upper plate and the lower plate are rectangular in plan view. The battery pack according to claim 2, wherein a heat insulating member is mounted on an upper end of the hollow structure. The battery pack according to claim 1, wherein through holes are formed in four corners of the upper plate and the lower plate, respectively, through which fastening members for fixing the cell module laminate are inserted. The battery pack according to claim 1, wherein a control unit is disposed between the upper plate and the pack cover. The battery pack as claimed in claim 5, wherein a reinforcing member passes between the controller and the upper plate. delete The battery pack as claimed in claim 1, wherein the reinforcing member is made of a metal material, a polymer resin material, or a polymer composite material. The battery pack according to claim 1, wherein the battery cell is a pouch-type battery cell in which an electrode assembly is embedded in a case of a laminate sheet including a resin layer and a metal layer. The method of claim 1, wherein the voltage detection assembly,
(a) a block case made of an electrically insulating material and mounted on a front surface or a back surface of a battery module corresponding to an electrode terminal connection portion of the battery cells;
(b) conductive sensing units respectively connected to the voltage detecting terminals located at one end of the bus bar electrically connected to the electrode terminal connecting parts of the battery cells; And
(c) a connector for transmitting the detection voltage of the conductive sensing units to the control unit;
A battery pack comprising a. The block case of claim 10, wherein the block case includes mounting grooves having a structure that is open in the front direction to mount the conductive sensing units at positions corresponding to the voltage detecting terminals of the bus bar, respectively. A battery pack, characterized in that connected to the terminal for detecting the voltage of the bus bar in a state in which the mounting grooves of the case. The battery pack as claimed in claim 10, wherein the conductive sensing units have a receptacle type structure fitted to a terminal for detecting a voltage of a bus bar from a front surface thereof. The battery pack according to claim 10, wherein the bus bar comprises a plate-shaped body electrically connected to an electrode terminal coupling portion of a battery cell, and a voltage detecting terminal formed at one end of the plate-shaped body. The method of claim 1, wherein the cartridge,
A rectangular structure corresponding to the battery cell so that the battery cell can be mounted thereon, and a through hole for radiating heat is formed at the central portion thereof;
Fasteners into which fastening members for fixing the cell module stacks are inserted are formed at four corners;
In front of the cartridge, a coupling portion having a structure in which a mounting insulation member for mounting the voltage detection assembly and the bus bar can be fastened in an assembly manner so that the voltage detection assembly can be stably connected to the bus bar. A battery pack characterized by the above. 15. The method of claim 14, wherein the mounting insulating member has a rectangular parallelepiped structure having a size corresponding to the front surface of the cell module stack, the rear surface is formed with a cartridge coupling groove that can be inserted into the front end of the cartridge is coupled The front surface of the battery pack, characterized in that the electrode terminal through grooves are formed on both sides so that the electrode terminal connecting portion of the battery cell is introduced from the rear to be exposed. 15. The method of claim 14, wherein a mounting portion for external input / output terminals for stably mounting the external input / output terminals of the bus bar is formed at both ends on the front surface of the mounting insulating member, and voltage detection for stably mounting the voltage detection assembly is carried out. The battery pack, characterized in that the mounting portion for the assembly is formed in the central portion. The battery pack according to claim 1, wherein four corners of the top plate are mounted with a '-' frame member for coupling with the pack cover and the pack case. 18. The method of claim 17, wherein the frame member is formed with first through holes formed on both side portions of the pack cover, and fasteners for engaging with the second through holes of the pack case formed in a portion corresponding to the first through holes are formed The battery pack which is characterized by. The battery pack of claim 1, wherein the battery pack is used as a power source for an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a power storage device. A cell module laminate having a structure in which a plurality of cell modules having a structure in which a battery cell is mounted on a cartridge are stacked on top and bottom, a lower plate supporting a lower end of the cell module laminate, A battery module including a top plate for fixing the top cartridge, and a voltage detection assembly for detecting a voltage of the battery cells;
A box-shaped pack case to which the battery module is mounted;
A pack cover coupled to the pack case; And
A reinforcing member coupled to the pack case while surrounding the upper portion of the battery module so that the battery module can be stably mounted to the pack case;
The top plate and the bottom plate is a battery pack, characterized in that consisting of a rectangular hollow hollow structure. A cell module laminate having a structure in which a plurality of cell modules having a structure in which a battery cell is mounted on a cartridge are stacked on top and bottom, a lower plate supporting a lower end of the cell module laminate, A battery module including a top plate for fixing the top cartridge, and a voltage detection assembly for detecting a voltage of the battery cells;
A box-shaped pack case to which the battery module is mounted;
A pack cover coupled to the pack case; And
A reinforcing member coupled to the pack case while surrounding the upper portion of the battery module so that the battery module can be stably mounted to the pack case;
Battery packs, characterized in that through-holes for inserting fastening members for fixing the cell module stacks are formed at four corners of the upper plate and the lower plate, respectively. A cell module laminate having a structure in which a plurality of cell modules having a structure in which a battery cell is mounted on a cartridge are stacked on top and bottom, a lower plate supporting a lower end of the cell module laminate, A battery module including a top plate for fixing the top cartridge, and a voltage detection assembly for detecting a voltage of the battery cells;
A box-shaped pack case to which the battery module is mounted;
A pack cover coupled to the pack case; And
A reinforcing member coupled to the pack case while surrounding the upper portion of the battery module so that the battery module can be stably mounted to the pack case;
The battery pack, characterized in that the control unit is located between the top plate and the pack cover. A cell module laminate having a structure in which a plurality of cell modules having a structure in which a battery cell is mounted on a cartridge are stacked on top and bottom, a lower plate supporting a lower end of the cell module laminate, A battery module including a top plate for fixing the top cartridge, and a voltage detection assembly for detecting a voltage of the battery cells;
A box-shaped pack case to which the battery module is mounted;
A pack cover coupled to the pack case; And
A reinforcing member coupled to the pack case while surrounding the upper portion of the battery module so that the battery module can be stably mounted to the pack case;
Four corners of the top plate is a battery pack, characterized in that the 'b' shaped frame member for coupling with the pack cover and the pack case is mounted.

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