KR20120054807A - Battery pack having novel structure - Google Patents

Abstract

PURPOSE: A battery pack is provided to be stably mounted to a base plate stably, to maintain the arranged structure of battery module assemblies stably, while remarkably increasing the structural stability against the load and external force. CONSTITUTION: A battery pack comprises two or more battery module assemblies mounted on a base plate(100). The two or more battery module assemblies comprise battery modules. Unit modules consisting of two or more battery cells are electrically connected each other, thereby forming battery modules. An uneven part(110) is formed between parts, in which battery module assemblies are mounted, in order to increase structural stability against load of the battery module assemblies. The length of the uneven part is 50-90 % on the basis of the width of the base plate, and the height of the uneven part is 1-10 % on the basis of the height of the battery module assembly.

Description

Battery Pack Having Novel Structure {Battery Pack Having Novel Structure}

The present invention relates to a battery pack having a novel structure, and more particularly, to a structure in which two or more battery module assemblies including battery modules electrically connected to unit modules including two or more battery cells are mounted on a base plate. As a battery pack, the base plate relates to a battery pack consisting of a structure in which the uneven portion is formed between the mounting portion of the battery module assemblies to stably mount the battery module assemblies and increase the structural stability with respect to the load of the battery module assemblies.

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been widely used as energy sources for wireless mobile devices. Secondary batteries are also attracting attention as a power source for electric vehicles (EVs) and hybrid electric vehicles (HEVs), which are proposed as a way to solve air pollution in conventional gasoline and diesel vehicles that use fossil fuels. .

Small or mobile devices use one or two or four battery cells per device, whereas medium and large devices such as automobiles are used in medium and large battery packs electrically connected to a plurality of battery cells due to the necessity of high output capacity.

Since medium and large battery packs are preferably manufactured in small sizes and weights, square batteries, pouch-type batteries, etc., which can be charged with high integration and have a small weight to capacity, are mainly used as battery cells of medium and large battery packs. In particular, a pouch-type battery using an aluminum laminate sheet or the like as an exterior member has attracted much attention in recent years due to its advantages such as low weight, low manufacturing cost, and easy deformation.

In addition, in order for the medium-large battery pack to provide the output and capacity required in a predetermined device or device, a plurality of battery cells must be electrically connected in series and be able to maintain a stable structure against external force.

On the other hand, in general, the battery pack is fixed to the base plate (base plate) to improve the vibration characteristics of the battery module, the end plate (support plate), such as a member for the appropriate number of battery modules (support bar) It is prepared using.

However, the battery pack having the above structure has a lot of space constraints in mounting the battery modules, and when a large number of battery modules are configured together, there is a problem in that structural stability of the overall battery pack is weakened.

In addition, in the conventional battery pack, in order to secure the dynamic stability of the battery modules to the base plate by bolts or nuts to prevent movement in the vertical direction, it is configured in the form of fixing the longitudinal direction through the end plate and the support beam.

However, since the battery pack of the structure is mounted on the support plate using a bolt or nut, it is difficult to install and detach the battery modules in the event of a failure of the battery pack is difficult to maintain, and in the horizontal direction (X direction) There is a problem that the vibration characteristics of the fall.

Therefore, there is a need for a battery pack having a novel structure that can solve the above problems.

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.

An object of the present invention is to provide a battery pack including a base plate of a specific structure so that the battery module in a battery pack of a structure in which a plurality of battery modules are mounted on the base plate can be mounted stably.

Another object of the present invention is to provide a battery pack having excellent structural stability against load and external force of the battery modules while maintaining the arrangement structure of the battery modules in a stable manner.

Still another object of the present invention is to provide a battery pack including a battery module assembly which is compact in overall and has excellent structural stability and easy assembly process.

Battery pack according to the present invention for achieving this object,

A battery pack having a structure in which two or more battery module assemblies including battery modules electrically connected to unit modules composed of two or more battery cells are mounted on a base plate.

The base plate has a structure in which the uneven portion is formed between the mounting portions of the battery module assemblies to stably mount the battery module assemblies and to increase structural stability with respect to the load of the battery module assemblies.

In the battery pack of the present invention, since the uneven portion serves as a mounting guide of the battery module assemblies, the battery module assemblies may be stably mounted on the base plate. In addition, since the battery module assemblies do not need to be coupled to the base plate using a separate fastening member such as a bolt or a nut as in the conventional battery pack, the assembly can be easily performed.

Furthermore, the uneven portion improves the mechanical rigidity of the base plate against external force and at the same time prevents the battery module assemblies from moving in the lateral direction (X direction), thereby improving the structural stability to the load of the battery module assemblies without additional components. In addition, when the battery module assembly is additionally mounted on the base plate in order to increase the capacity of the battery pack, only the size of the base plate needs to be changed, thereby improving expandability and maintainability compared to the conventional battery pack structure.

The length of the uneven portion is not particularly limited as long as it can be easily mounted on the battery module assemblies to the base plate, for example, may be a structure formed in a size of 50% to 90% based on the width of the base plate. .

Specifically, when the length of the uneven portion is less than 50% based on the width of the base plate, the possibility that the battery module assemblies mounted on the base plate may be out of position may be increased. This is undesirable because it increases.

The height of the uneven portion is not particularly limited as long as the height of the battery module assemblies can be easily mounted on the base plate, for example, may be a structure formed in the size of 1% to 10% based on the height of the battery module assembly. .

Specifically, if the height of the concave-convex portion is less than 1% based on the height of the battery module assembly, it may be difficult to exert effects due to the formation of the concave-convex portion. .

As a preferred example, the lower end of the battery module assembly has a shape corresponding to the uneven portion of the base plate such that the contact portion of the battery module assembly and the base plate is coincident with the battery module assembly mounted on the base plate. It may be made of a structure.

As another example, the base plate is made of a single plate, it is possible to ensure the mechanical rigidity of the base plate compared to the structure consisting of a number of plates.

At one end of the base plate may be made of a structure in which the electric member is mounted, the electric member is, for example, a direct current generated in the battery module assembly during discharge of the battery cell for use as an AC power source for operating the motor of the vehicle Inverter that converts electricity to AC electricity, and Low voltage DC to DC converter that converts high voltage electricity of battery module assembly generated when battery cell is discharged to low voltage DC electricity to operate electric equipment of vehicle ) May be included.

On the other hand, the battery module assembly,

(a) a structure in which unit modules composed of two or more battery cells are arranged in close or close contact with each other in a state in which two or more battery modules having a structure in which the module is connected to the cartridge in series and / or parallel are electrically connected to each other. Battery module assembly;

(b) a pair of front and rear support members surrounding the front and rear of the outermost battery modules in the battery module assembly;

(c) an upper connecting member connecting the front support member and the rear support member at an upper end of the battery module assembly to support an upper portion of the battery module assembly; And

(d) a pair of lower end connecting members connecting the front support member and the rear support member at a lower end of the battery module assembly to support the lower part of the battery module assembly;

It may be a structure including a.

The battery module assembly of the above structure is mounted on the battery module assembly by a pair of front support members and rear support members, an upper connection member, and a pair of lower connection members, so that the battery module assembly may be caused by external force or vibration. Damage can be effectively prevented and overall structural stability can be ensured.

In addition, since the pair of lower connection members connect the front support member and the rear support member at the bottom of the battery module assembly to support the lower part of the battery module assembly, the weight of the battery module assembly can be easily supported. have.

An indentation portion is formed at both sides of the lower end of the cartridge to mount the lower connecting member, so that the lower connecting member can be easily mounted on the lower end of the cartridge, and the lower connecting member does not protrude to the outside of the battery module assembly. The assembly can be made compact in its entirety.

The lower connection member is preferably a rod structure, and may have a structure in which a fastening screw thread is formed on inner peripheral surfaces of both ends of the rod.

At the upper end of the front support member and the rear support member, preferably, a through hole for the upper connection member is formed through which the upper connection member is inserted and coupled, such that the upper connection member penetrates through the upper connection member of the front support member and the rear support member. By inserting into the sphere, the connection between the upper connecting member and the front support member and the rear support member can be easily achieved.

In one preferred example, a pair of lower connection members through-holes are formed at the lower ends of the front support member and the rear support member so that the lower connection member is inserted and coupled, such that the lower connection member is formed of the front support member and the rear support member. By inserting into the through hole for the lower connecting member it is possible to easily achieve the connection of the lower connecting member and the front support member and the rear support member.

The cartridge is preferably a rectangular structure corresponding to the unit module so that the unit module can be mounted, the heat dissipation opening for heat dissipation is formed in the central portion, and the fastening member for the unit module for fixing the unit modules is provided. The fastener for the unit module to be inserted may be formed in four corners.

The electrode terminals of the unit modules are electrically connected to each other by a bus bar, so as to secure a desired output by serial and / or parallel connection as necessary.

Meanwhile, a bus bar assembly for electrically connecting the battery modules in series may be mounted on the top of the battery module assembly.

In the structure, the bus bar assembly,

(a) a cover plate made of an electrically insulating material and mounted on top of the battery modules;

(b) two or more conductive connections electrically connected to external input / output terminals of the battery modules mounted on the cover plate; And

(c) bus bars for at least two battery modules mounted on top of the cover plate in a direction perpendicular to the arrangement direction of the battery modules for electrically connecting conductive connections of the battery modules;

It may be a structure containing.

Preferably, the sensing member for measuring the voltage of the battery modules may be a structure that is further mounted on the top of the cover plate to be electrically connected to the conductive connection.

The conductive connection parts may include a first conductive connection part electrically connected to an external input / output terminal and a sensing member of the battery module, and a second conductive connection part electrically connected to one end of the bus bar.

In the above structure, the fastening groove into which the external input / output terminals can be inserted and coupled to the first conductive connection portion is drilled, thereby achieving electrical connection of the external input / output terminal and the conductive connection portion.

The sensing member has a structure including a terminal connecting portion coupled to an upper end of the first conductive connecting portion for sensing a voltage, a connector for transmitting a detection voltage of the terminal connecting portion to a controller, and a wire connecting the terminal connecting portion to the connector. It may be made of.

The present invention also provides a battery module having a novel structure.

Specifically, the battery module,

A unit module stack in which two or more unit modules having a structure in which battery cells are mounted in a cartridge form a close or adjacent stack structure;

A lower plate supporting a lower end of the unit module stack; And

An upper plate fixing the uppermost cartridge of the unit module stack positioned on the lower plate;

It may be a structure that includes.

Through-holes are formed in the cartridge, the upper plate and the lower plate to communicate with each other,

The through holes may have a fixing member having a hollow structure for determining a fastening height, and a coupling member may be inserted into the fixing member to fasten the cartridge, the upper plate, and the lower plate to each other.

The fixing member is preferably a hollow structure having a polygonal or circular shape on a horizontal cross section, the inner surface shape of the through holes is made to match the outer surface shape of the fixing member, so that the fixing member is easily attached to the through hole. Can be inserted.

The height of the fixing member may be formed in a structure corresponding to the coupling height of the cartridge, the top plate and the bottom plate, the fixing member may be made of a metal material, for example.

The upper end of the coupling member may be fixed to the upper plate by the outer peripheral portion larger than the upper end of the fixing member, the lower end of the coupling member may be a structure for fixing the lower plate by the outer peripheral portion larger than the lower end of the fixing member.

The coupling member is not particularly limited as long as it can be easily coupled with the fixing member, but may be, for example, a fastening bolt.

In the above structure, the coupling member may further include a fastening nut coupled to the bottom of the fastening bolt, the top plate and the bottom plate may each be a metal material.

The upper plate and the lower plate may include a heat insulating material for preventing the inflow of the radiant heat into the unit module in the center.

On the other hand, the unit modules may be made of a structure that is connected in parallel by a bus bar.

The bus bar is preferably,

(a) at least two unit module terminal connections including a vertical bending surface in contact with one surface of an electrode terminal of each unit module; And

(b) an external input / output terminal connection unit in which the unit module connection units are integrally connected;

It may be a structure including a.

The main body of the unit module terminal connection unit and the external input / output terminal connection unit may be formed in a plate-like structure to be mounted on one surface of the unit module stack.

The external input / output terminal connection part is perforated with a fastening hole through which the external input / output terminal can be inserted and coupled, so that the external input / output terminal can be easily inserted into the external input / output terminal connection part.

The unit module stack may have a structure in which the positive terminal and the negative terminal of the unit modules are stacked in a structure located at one end of the stack.

In the above structure, the unit module stack is equipped with a positive electrode bus bar for connecting the positive terminals of the unit modules in parallel, a negative electrode bus bar for connecting the negative terminals of the unit modules in parallel, the bus bars are spaced apart from each other Furnace structure may be mounted on an electrically insulating member ("insulating mounting member").

The bus bars preferably have a structure in which the vertical bending surface of the unit module terminal connection part and the external input / output terminal connection part are integrally mounted to the insulating mounting member by insert injection molding so that the bus bars are integrally formed. It is preferable because no separate assembly process is required in the coupling between the insulating mounting member and the insulating mounting member.

The insulating mounting member may have a structure in which a mounting groove for mounting the upper connecting member is formed between the negative electrode bus bar and the positive electrode bus bar.

The battery cell may be 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, and preferably, a pouch type lithium secondary battery.

The battery pack 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 the battery pack with predetermined units, for example, battery module assemblies of four, six, eight, ten, etc., the battery pack can be effectively mounted in a limited space as necessary.

The battery pack according to the present invention may be manufactured by combining the battery module assemblies according to the desired output and capacity, and considering the mounting efficiency, structural stability, and the like as described above, electric vehicles, hybrid electric vehicles, plug-in hybrid Although it can be preferably used as a power source for electric vehicles, electric power storage devices, etc., the application range is not limited to these.

As described above, in the battery pack according to the present invention, since the uneven part is formed in the base plate, the battery module assemblies can be stably mounted to the base plate by the uneven part serving as a guide.

In addition, while maintaining the arrangement structure of the battery module assemblies by the concave-convex portion, it is possible to manufacture a battery pack with significantly improved structural stability against the load and external force of the battery module assemblies.

Moreover, the battery module assembly constituting the battery pack according to the present invention provides various advantages such as compactness, excellent structural stability, and easy assembly process.

1 is a perspective view of a base plate according to one embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a portion A of FIG. 1; FIG.
3 is a partial schematic view showing the internal cross section of the battery pack according to another embodiment of the present invention;
FIG. 4 is an enlarged schematic view of a portion B of FIG. 3; FIG.
5 is a perspective view of a battery pack according to another embodiment of the present invention;
6 is an exploded perspective view of a battery module assembly mounted to the battery pack of FIG. 5;
7 and 8 are perspective views illustrating a process in which the battery modules are mounted on the lower connection member of FIG. 6;
9 is a coupling diagram of the battery module assembly of Figure 6;
10 is a schematic cross-sectional view showing a structure in which a unit module is mounted on a cartridge;
FIG. 11 is a perspective view illustrating a structure in which a bus bar assembly is mounted on the top of the battery module assembly of FIG. 9; FIG.
12 is an enlarged perspective view of the bus bar assembly of FIG. 11;
FIG. 13 is a schematic plan view of the battery module of FIG. 9; FIG.
14 is a perspective view illustrating a fastening process between a fixing member and a coupling member used in manufacturing the battery module of FIG. 13;
15 is a partially enlarged perspective view of FIG. 14;
16 is a perspective view of a bus bar according to another embodiment of the present invention;
17 and 18 are a plan view and a perspective view showing a coupling state of the bus bar and the insulating mounting member;
19 is a perspective view of the battery module of FIG. 9.

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 schematically showing a base plate according to one embodiment of the present invention, Figure 2 is a schematic diagram showing an enlarged portion A of FIG.

3 is a partial schematic diagram showing an internal cross section of a battery pack according to still another embodiment of the present invention, FIG. 4 is a schematic diagram showing an enlarged portion B of FIG. 3, and FIG. A perspective view of a battery pack according to still another embodiment of is schematically illustrated.

Referring to these drawings, the battery pack 600 mounts the battery module assemblies 300 on the upper part of the base plate 100, and the base plate 100 has an uneven portion 110, the battery module assemblies 300 It is formed between the mounting portion of), to stably mount the battery module assemblies 300 and to increase the structural stability to the load of the battery module assemblies (300).

The length l of the uneven portion 110 is 80% based on the width W of the base plate 100, and the height h of the uneven portion 110 is the height of the battery module assembly 300. It is formed in the size of 2% based on H).

In addition, the lower end 120 of the battery module assembly 300 has a shape corresponding to the uneven portion 110 of the base plate 100, so that the battery module assembly 300 is mounted on the base plate 100 The contact area between the battery module assembly 300 and the base plate 100 is coincident.

The base plate 100 is formed of one plate material, and the electrical component 610 is mounted at one end of the base plate 100.

6 is an exploded perspective view schematically showing a battery module assembly mounted to the battery pack of FIG. 5, and FIGS. 7 and 8 are perspective views illustrating a process of mounting the battery modules to the lower connection member of FIG. 6. Is shown.

In addition, FIG. 9 is a schematic view showing a coupling of the battery module assembly of FIG. 6, and FIG. 10 is a cross-sectional schematic diagram showing a structure in which a unit module is mounted in a cartridge.

Referring to these drawings, the battery module assembly 300, the battery module array 220, a pair of front support member 310 and rear support member 320, the top connecting member 330, and a pair of The lower connection member 340 is configured.

The battery module array 220 is a unit module consisting of three battery cells are connected in series and / or in parallel in a state in which the four battery modules 230 of the structure mounted on the cartridge 350 is electrically interconnected, It is arranged side by side to be in close contact with each other.

The front support member 310 and the rear support member 320 surround the front and rear of the outermost battery modules in the battery module array 220, the upper connection member 330 is the upper end of the battery module array 220 The front support member 310 and the rear support member 320 are connected to each other to support the upper portion of the battery module array 220.

In addition, the lower connection member 340 is connected to the front support member 310 and the rear support member 320 at the lower end of the battery module array 220, in order to support the lower portion of the battery module array 220. .

Through holes 352 are formed at both lower ends of the cartridge 350 so that the lower connection member 340 is inserted into the through hole 352, and the lower connection member 340 has a rod structure and is fastened to the inner peripheral surfaces of both ends of the rod. Dragon thread (not shown) is formed.

At the upper end of the front support member 310 and the rear support member 320 is formed a through hole 312 for the upper connection member is inserted into the upper connection member 330, the front support member 310 and the rear support member A pair of lower end connecting members through holes 314 to which the lower connection members 340 are inserted and coupled are formed at both lower ends of the 320.

In addition, the cartridge 350 has a rectangular structure corresponding to the unit module 240 so that the unit module 240 composed of three battery cells can be mounted therein, and a heat dissipation opening for radiating heat is formed at the central portion, and the unit module The fastener 242 for the unit module into which the fastening member (not shown) for unit module for fixing the field 240 is inserted is formed at four corners.

FIG. 11 is a perspective view schematically illustrating a structure in which a bus bar assembly is mounted on an upper end of the battery module assembly of FIG. 9, and an enlarged perspective view of the bus bar assembly of FIG. 11 is schematically illustrated in FIG. 12. .

Referring to these drawings, the bus bar assembly 410 for electrically connecting the battery modules 230 in series is mounted on the top of the battery module array 220.

The bus bar assembly 410 is made of an electrically insulating material and is mounted on the top of the battery module assembly 220, a cover plate 412, six conductive connections 414, and three battery module buses. It consists of bars 416.

In addition, the conductive connectors 414 are electrically connected to the external input / output terminals 402 of the battery modules 230 while being mounted on the cover plate 412, and the bus bars 416 for the battery module are connected to the battery module. In order to electrically connect the conductive connecting portions 414 of the field 230, the upper side of the cover plate 412 is mounted in a direction perpendicular to the arrangement direction of the battery modules 230.

The sensing member 418 is mounted on the top of the cover plate 412 such that the sensing member 418 is electrically connected to the conductive connectors 414 to measure the voltage of the battery modules 230, and the conductive connectors 414 are the battery modules. First conductive connection portion 411 electrically connected to the external input / output terminal 402 and the sensing member 418 of the 230, and second conductive connection portion electrically connected to one end of the bus bar 416 for the battery module (not shown) Not).

In addition, a fastening groove 415 into which the external input / output terminal 402 of the battery module 230 is inserted and coupled may be drilled in the first conductive connection part 411.

The sensing member 418 includes a terminal connecting portion 413 coupled to an upper end of the first conductive connecting portion 411 and a connector for transmitting a detected voltage of the terminal connecting portion 413 to a controller (not shown) to sense a voltage. 417 and a wire 419 connecting the terminal connecting portion 413 to the connector 417.

FIG. 13 is a schematic cross-sectional view of a battery module constituting the battery module assembly of FIG. 6, and FIG. 14 is a perspective view schematically illustrating a fastening process between a fixing member and a coupling member used in manufacturing the battery module of FIG. 13. It is.

15 is a schematic partially enlarged perspective view of FIG. 14.

Referring to these drawings, the battery module 230 is composed of a unit module stack 232, a lower plate 236, and an upper plate 234.

The unit module stack 232 has a stacked structure in which three unit modules are in close contact with each other, and the lower plate 236 supports the lower end of the unit module stack 232.

In addition, the top plate 234 fixes the top cartridge (not shown) of the unit module stack 232 located on the bottom plate 236.

The through holes 470 are formed at four corners in the cartridge (not shown), the top plate 234 and the bottom plate 236 so as to communicate with each other, and the through holes 470 are hollow to determine the fastening height. The fixing member 480 of the structure is inserted, and the coupling member 490 is inserted into the fixing member 480 to fasten the cartridge, the upper plate 234 and the lower plate 236 to each other.

The fixing member 480 has a circular hollow structure on a horizontal cross section, and the inner surface of the through holes 470 has a structure that matches the outer surface of the fixing member 480.

In addition, the height of the fixing member 480 substantially coincides with the coupling height of the cartridge, the top plate 234 and the bottom plate 236, the fixing member 480 is made of a metal material.

The upper end of the coupling member 490, which is a fastening bolt, fixes the upper plate 234 by an outer circumference larger than the upper end of the fixing member 480, and the lower end of the coupling member 490 is smaller than the lower end of the fixing member 480. The position of the lower plate 236 is fixed by the large outer periphery.

In addition, the coupling member 490 includes a fastening nut (not shown) coupled to the lower end of the fastening bolt, and the upper plate 234 and the lower plate 236 are each made of a metal material.

The upper plate 234 and the lower plate 236 include a heat insulating material 238 to prevent the radiant heat from entering the cell at the center, and the unit modules 430 are electrically connected in parallel by the bus bar 432. have.

16 is a perspective view schematically showing a bus bar according to another embodiment of the present invention, Figures 17 and 18 are a plan view and a perspective view schematically showing a coupling state of the bus bar and the insulating mounting member. .

19 is a perspective view schematically illustrating the battery module of FIG. 9.

Referring to these drawings in conjunction with FIG. 14, the bus bar 432 may include three unit module terminal connection parts 433 including a vertical bending surface in contact with one surface of an electrode terminal of each unit module 430, and a unit module. The connection parts 433 are formed of an external input / output terminal connection part 436 connected integrally.

The main body of the unit module terminal connection part 433 and the external input / output terminal connection part 436 have a plate-like structure, and are mounted on one surface of the unit module stack 232, and the fastening through holes 437 are provided in the external input / output terminal connection part 436. ), The external input / output terminals 451 and 452 are inserted into the fastening through hole 437.

The unit module stack 232 is stacked in a structure in which the positive electrode terminal 453 and the negative electrode terminal 455 of the unit modules 430 are located at one end of the laminate, respectively.

In addition, the unit module stack 232 has a positive electrode bus bar 461 for connecting the positive terminals 453 of the unit modules in parallel, and a negative electrode bus bar for connecting the negative terminals 455 of the unit modules in parallel. 462 is mounted, and the bus bars 461 and 462 are mounted to the insulating mounting member 458 in a state where they are spaced apart from each other.

The bus bars 461 and 462 are integrally mounted to the insulating mounting member 458 by insert injection molding in such a manner that the vertical bending surface of the unit module terminal connection part 433 and the external input / output terminal connection part 436 are exposed to the top. In the insulating mounting member 458, a mounting groove 459 for mounting the upper connecting member is formed between the negative electrode bus bar 462 and the positive electrode bus bar 461.

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 (37)

A battery pack having a structure in which two or more battery module assemblies including battery modules electrically connected to unit modules composed of two or more battery cells are mounted on a base plate.
The base plate is a battery pack, characterized in that the uneven portion is formed between the mounting portion of the battery module assemblies to reliably mount the battery module assemblies and increase the structural stability with respect to the load of the battery module assemblies. The method of claim 1, wherein the length of the uneven portion is a battery pack, characterized in that formed in the size of 50% to 90% based on the width of the base plate. The method of claim 1, wherein the height of the uneven portion is a battery pack, characterized in that formed in the size of 1% to 10% based on the height of the battery module assembly. According to claim 1, wherein the lower end of the battery module assembly, the battery module assembly is formed in a shape corresponding to the concave-convex portion of the base plate so that the contact portion of the battery module assembly and the base plate coincides with the base plate is mounted. A battery pack, characterized in that. The battery pack as claimed in claim 1, wherein the base plate is made of one plate. The battery pack as claimed in claim 1, wherein an electric component is mounted at one end of the base plate. The method of claim 1, wherein the battery module assembly,
(a) a structure in which unit modules composed of two or more battery cells are connected in series and / or parallel and arranged side by side to be in close contact with or adjacent to each other in a state where two or more battery modules are electrically connected to each other. A battery module assembly;
(b) a pair of front and rear support members surrounding the front and rear of the outermost battery modules in the battery module assembly;
(c) an upper connecting member connecting the front support member and the rear support member at an upper end of the battery module assembly to support an upper portion of the battery module assembly; And
(d) a pair of lower end connecting members connecting the front support member and the rear support member at a lower end of the battery module assembly to support the lower part of the battery module assembly;
Battery pack, characterized in that consisting of. 8. The battery pack as claimed in claim 7, wherein indentations are formed at both lower ends of the cartridge to mount the lower connection members. The battery pack according to claim 7, wherein the lower connection member has a rod structure, and fastening threads are formed on inner peripheral surfaces of both ends of the rod. 8. The battery pack as claimed in claim 7, wherein upper ends of the front support members and the rear support members are formed with through holes for upper connection members inserted into and coupled with upper connection members. The battery pack as claimed in claim 7, wherein a pair of lower end connection members through-holes are formed at lower ends of the front support member and the rear support member to insert and engage a lower connection member. The method of claim 7, wherein the cartridge,
A rectangular structure corresponding to the unit module so that the unit module can be mounted therein, and an opening for radiating heat is formed at the central portion thereof;
Battery pack, characterized in that the fasteners for the unit module is inserted into the four corners is inserted into the fastening member for the unit module for fixing the unit modules. The battery pack as claimed in claim 7, wherein the electrode terminals of the unit modules are electrically connected to each other by a bus bar. 8. The battery pack as claimed in claim 7, wherein a bus bar assembly for electrically connecting the battery modules in series is mounted on an upper end of the battery module assembly. The method of claim 14, wherein the bus bar assembly,
(a) a cover plate made of an electrically insulating material and mounted on top of the battery modules;
(b) two or more conductive connections electrically connected to external input / output terminals of the battery modules mounted on the cover plate; And
(c) bus bars for at least two battery modules mounted on top of the cover plate in a direction perpendicular to the arrangement direction of the battery modules for electrically connecting conductive connections of the battery modules;
A battery pack comprising a. The battery pack as claimed in claim 15, wherein a sensing member for measuring the voltage of the battery modules is further mounted on the top of the cover plate so as to be electrically connected to the conductive connectors. 17. The battery of claim 16, wherein the conductive connection parts comprise a first conductive connection part electrically connected to an external input / output terminal of the battery module and the sensing member, and a second conductive connection part electrically connected to one end of the bus bar. pack. 18. The battery pack as claimed in claim 17, wherein the first conductive connection portion is provided with a fastening groove for inserting and coupling an external input / output terminal. 18. The method of claim 17, wherein the sensing member is connected to an upper end of the first conductive connecting portion for sensing a voltage, a connector for sending a detection voltage of the terminal connecting portion to the control unit, and connecting the terminal connecting portion to the connector A battery pack comprising a wire. The method of claim 1, wherein the battery module,
A unit module stack in which two or more unit modules having a structure in which battery cells are mounted in a cartridge form a close or adjacent stack structure;
A lower plate supporting a lower end of the unit module stack; And
An upper plate fixing the uppermost cartridge of the unit module stack positioned on the lower plate;
A battery pack comprising a. The method of claim 20, wherein the through hole is formed in the cartridge, the top plate and the bottom plate in communication with each other,
The through hole is a battery pack, characterized in that the fixing member of the hollow structure to determine the fastening height is inserted, the coupling member is inserted into the fixing member to fasten the cartridge, the top plate and the bottom plate to each other. 22. The battery pack as claimed in claim 21, wherein the fixing member is a hollow structure having a polygonal or circular shape in a horizontal cross section, and the inner surface of the through holes coincides with the outer surface of the fixing member. 22. The battery pack as claimed in claim 21, wherein the height of the fixing member corresponds to a coupling height of the cartridge, the top plate, and the bottom plate. 22. The method of claim 21, wherein the upper end of the coupling member is fixed to the upper plate by the outer peripheral portion larger than the upper end of the fixing member, the lower end of the coupling member is fixed to the lower plate by the outer peripheral portion larger than the lower end of the fixing member Battery pack made with. 22. The battery pack as claimed in claim 21, wherein the coupling member is a fastening bolt. 26. The battery module of claim 25, wherein the coupling member further comprises a fastening nut coupled to a lower end of the fastening bolt. 21. The battery pack as claimed in claim 20, wherein the upper plate and the lower plate include a heat insulating material for preventing inflow of radiant heat into the cell at the center portion. The battery pack as claimed in claim 20, wherein the unit modules are connected in parallel by bus bars. The method of claim 28, wherein the bus bar,
(a) at least two unit module terminal connections including a vertical bending surface in contact with one surface of an electrode terminal of each unit module; And
(b) an external input / output terminal connection unit in which the unit module connection units are integrally connected;
A battery pack comprising a structure comprising a. The battery pack as claimed in claim 29, wherein the main body of the unit module terminal connection unit and the external input / output terminal connection unit have a plate-like structure to be mounted on one surface of the unit module stack. 30. The battery pack as claimed in claim 29, wherein the external input / output terminal connection part is provided with a through hole for fastening through which an external input / output terminal can be inserted and coupled thereto. The battery pack according to claim 20, wherein the unit module stack is stacked in a structure in which the positive terminal and the negative terminal of the unit module are positioned at one end of the stack. 33. The method of claim 32, wherein the unit module stack is equipped with a positive electrode bus bar for connecting the positive terminals of the unit modules in parallel, a negative electrode bus bar for connecting the negative terminals of the unit modules in parallel, the bus bars are mutually A battery pack, which is mounted to an electrically insulating member ("insulating mounting member") in a spaced apart state. 34. The battery pack as claimed in claim 33, wherein the bus bars are integrally mounted to the insulating mounting member by insert injection molding in such a manner that the vertical bending surface of the unit module terminal connection part and the external input / output terminal connection part are exposed upward. . 34. The battery pack as claimed in claim 33, wherein a mounting groove for mounting the upper connecting member is formed between the negative electrode bus bar and the positive electrode bus bar in the insulating mounting member. The battery pack according to claim 1, wherein the battery cell is 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 pack according to claim 36, 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.

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