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WO2014003382A1 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
WO2014003382A1
WO2014003382A1 PCT/KR2013/005532 KR2013005532W WO2014003382A1 WO 2014003382 A1 WO2014003382 A1 WO 2014003382A1 KR 2013005532 W KR2013005532 W KR 2013005532W WO 2014003382 A1 WO2014003382 A1 WO 2014003382A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
battery pack
battery
frame
cell frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2013/005532
Other languages
French (fr)
Korean (ko)
Inventor
김덕수
임동훈
황재일
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SK Innovation Co Ltd
Original Assignee
SK Innovation Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SK Innovation Co Ltd filed Critical SK Innovation Co Ltd
Publication of WO2014003382A1 publication Critical patent/WO2014003382A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0486—Frames for plates or membranes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0468—Compression means for stacks of electrodes and separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
    • H01M50/276—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack, and more particularly, a cell frame is provided between a pair of battery cells to be supported from the lower side of the battery cell, and a rigid reinforcement part of a steel material is inserted into the lower side of the cell frame to provide a battery cell.
  • the present invention relates to a battery pack in which a mounting rigid structure is reinforced.
  • a small mobile device one or two or four battery cells are used per device, whereas in a medium and large device such as an automobile, a large and medium battery pack using a plurality of battery cells electrically connected as a unit cell is used due to the necessity of high output capacity.
  • medium and large battery packs are preferably manufactured in a small size and weight
  • square batteries, pouch-type batteries, etc. which can be stacked with high integration and have a small weight to capacity, are mainly used as battery cells of medium and large battery packs.
  • a pouch-type battery having a small weight, a small possibility of leakage of an electrolyte solution, and a low manufacturing cost attracts much attention.
  • the battery pack having a unit cell having a form in which the electrode tab protrudes on both sides is formed in a vertical stack, the space is spaced between the unit cells to allow air to pass through the left and right directions are formed.
  • the disadvantage is that air flowing in the up and down directions is difficult to pass.
  • the battery pack of the top and bottom stack type is easy to be filled with moisture in the unit cell located on the bottom surface, the cooling is not made well because of the swelling phenomenon there is a disadvantage that may cause a safety problem such as short circuit phenomenon.
  • the present invention has been made to solve the problems described above, the object of the present invention is to configure the battery cells of the type in which the electrode tabs are formed on both sides to be stacked in the horizontal direction to facilitate the air-cooled cooling, It is to provide a battery pack that can reinforce the mounting rigid structure of the battery cell.
  • a cell space is formed therein, a cell frame formed of a polygonal frame, a first battery cell stacked on one side of the cell frame, and a second battery stacked on the other side of the cell frame.
  • At least one unit cell comprising a cell;
  • a partition formed of a plurality of frames and sandwiched between a plurality of unit cells when the unit cells are stacked.
  • a rigid reinforcement part of a steel material is inserted into the lower side of the cell frame to support the first battery cell and the second battery cell.
  • the negative electrode tab protrudes on one side in the longitudinal direction
  • the positive electrode tab may protrude on the other side
  • the battery pack according to an embodiment of the present invention is a first case coupled to surround the negative electrode tab on one side in the longitudinal direction of the sub-battery module formed by stacking a plurality of unit cells and partitions, both tabs on the other side It may be formed including a second case that is coupled to surround.
  • the battery pack according to an embodiment of the present invention may be provided with aluminum covers on both sides in the width direction of the sub-battery module.
  • the cell frame according to an embodiment of the present invention is manufactured through an injection process made of plastic material, the rigid reinforcement of the steel material is inserted into the lower side can be manufactured by insert injection.
  • the battery pack according to an embodiment of the present invention may be formed in the recess recess recessed in the form corresponding to the rigid reinforcement portion to be inserted into the rigid reinforcement portion on the lower side of the cell frame.
  • the battery pack according to an embodiment of the present invention may be coupled to both ends of the rigid reinforcing portion may include a fastening means for fixing the rigid reinforcement to the cell frame.
  • the rigid reinforcing portion may be formed to include a plurality of reinforcing ribs are formed extending in the longitudinal direction of the cell frame, spaced apart a predetermined distance in the width direction.
  • a battery pack of the present invention a battery pack of a type in which electrode tabs are formed at both sides in a horizontal direction is stacked to form a battery pack, thereby preventing moisture from getting on the lower side, and arranged in parallel with a direction in which air flows, thereby cooling the air.
  • the battery pack of the present invention when laminated in a horizontal direction to configure the battery pack, in order to prevent the mounting rigid structure from weakening because the support structure of the lower end of the battery cell is conventionally dependent only on the thickness of the battery cell.
  • the mounting rigid structure can be reinforced by inserting a rigid reinforcement part made of steel to the lower end of the cell frame provided between the pair of battery cells.
  • the battery pack of the present invention has the advantage that the performance and safety of the secondary battery can be improved by improving the cooling efficiency and reinforcing the rigid structure.
  • 1 is a battery cell plan view.
  • FIG 3 is a perspective view of a battery pack according to the present invention.
  • Figure 4 is an exploded perspective view of a battery pack according to the present invention.
  • FIG. 5 is an exploded perspective view of a sub battery module included in a battery pack according to the present invention.
  • FIG. 6 is a perspective view of a cell frame included in a battery pack according to the present invention.
  • FIG. 7 is an exploded perspective view of a cell frame included in a battery pack according to the present invention.
  • FIG. 8 is a cross-sectional view along aa 'in FIG. 6; FIG.
  • FIG. 1 is a plan view of a battery cell
  • Figure 2 is a schematic diagram of a battery cell stack
  • Figure 3 is a perspective view of a battery pack according to the present invention
  • Figure 4 is an exploded perspective view of a battery pack according to the present invention
  • Figure 5 is a battery according to the present invention 6 is an exploded perspective view of a sub-battery module included in a pack
  • FIG. 6 is a perspective view of a cell frame included in a battery pack according to the present invention
  • FIG. 7 is an exploded perspective view of a cell frame included in a battery pack according to the present invention.
  • 8 is aa 'direction sectional drawing in FIG.
  • the battery pack 1 is largely formed by including a unit cell 100, a partition 200, a first case 20, a second case 30, and an aluminum cover 400. do.
  • the unit cell 100 is formed to include a cell frame 130, a first battery cell 110, and a second battery cell 120.
  • the first battery cell 110 and the second battery cell 120 are formed to include the battery unit 140, the pouch 150, the positive electrode tab 142, and the negative electrode tab 141.
  • the battery unit 140 may be disposed in the order of the positive electrode plate 144, the separator and the negative electrode plate 143 to be wound in one direction, or may be formed by stacking a plurality of the positive electrode plate 144, the separator and the negative electrode plate 143, and the positive electrode plate 144. Is electrically connected to the positive electrode tab 142 to protrude to one side, and the negative electrode plate 143 is electrically connected to the negative electrode tab 141 to protrude to the other side.
  • the positive electrode tab 142 and the negative electrode tab 141 are shown to protrude to both sides of the pouch 150 in the longitudinal direction, respectively, but the positive electrode tab 142 and the negative electrode tab 141 protrude from one side.
  • Various modifications can be made.
  • the pouch 150 is unlike a cylindrical or rectangular can structure formed of a thick metal material, and the intermediate layer is a metal foil, and the pouch 150 type case is formed of an insulating film with an inner film and an outer layer attached to both sides of the metal foil. to be.
  • the cell frame 130 corresponds to the battery unit 140 so that the battery unit 140 protruding in the width direction of the first battery cell 110 and the second battery cell 120 may be accommodated. It is hollow and formed into a polygonal frame.
  • the cell frame 130 has a hollow hollow inside to correspond thereto.
  • the portion 132 may be formed to have a ' ⁇ ' shape.
  • the cell frame 130 may be made of a flexible ethylene propylene (M-class rubber) material to facilitate tolerance management when the first battery cell 110 and the second battery cell 120 are stacked.
  • M-class rubber flexible ethylene propylene
  • the unit cell is formed by stacking the first battery cell 110 on one side of the cell frame 130 and stacking of the second battery cell 120 on the other side of the unit frame, and the battery unit of the first battery cell 110 ( 140 and the battery unit 140 of the second battery cell 120 is inserted into the hollow portion 132 of the cell frame 130 to be supported and fixed.
  • the battery pack 1 of the present invention is inserted into the rigid reinforcement portion 300 of the steel material in the lower side of the cell frame 130 to the lower side of the first battery cell 110 and the second battery cell 120. Will be supported.
  • the cell frame 130 is provided with a mounting recess 131 recessed in a shape corresponding to the rigid reinforcement 300 so that the rigid reinforcement 300 may be inserted into the lower side.
  • the steel part 300 may be formed to be detachable as necessary.
  • the cell frame 130 may be formed to include a fastening means 500 is coupled to both ends of the rigid reinforcement portion 300 to the rigid reinforcement portion 300 is fixed.
  • the cell frame 130 is formed with first insertion holes 530 which are formed to penetrate up and down in the height direction at both end portions of the lower surface, and correspond to the first insertion holes 530.
  • Second insertion holes 540 may be formed at both sides of the rigid reinforcement part 300 at the position.
  • the rigid reinforcement part 300 is inserted at a lower side thereof, and then the bolt 510 is inserted into the second insertion hole 540 inserted into the first insertion hole 530, and is opposite to the inserted surface.
  • the nut 520 may be coupled to and fixed to an end of the bolt 510 on the other side.
  • the second insertion hole 540 is tapped in a shape corresponding to the head of the bolt 510 in the region located at the inlet where the bolt 510 is inserted, so that the bolt 510 does not protrude out of the rigid reinforcement part 300. It is desirable to be able to be inserted therein and combined.
  • the rigid reinforcement unit 300 is inserted into the cell frame 130 may be fixed by applying an adhesive to the area in contact with, the method of combining the cell frame 130 and the rigid reinforcement unit 300 is variously modified. It is possible.
  • the cell frame 130 is manufactured through an injection process made of plastic, and the rigid reinforcement 300 of steel material is inserted into the lower side to be integrally formed by insert injection.
  • the cell frame 130 has an advantage that the assembly can be simplified because there is no need to separately process the rigid reinforcement unit 300.
  • the rigid reinforcing portion 300 is formed extending in the longitudinal direction of the cell frame 130, it may be formed including a plurality of reinforcing ribs 310 formed to be spaced apart a predetermined distance in the width direction.
  • the cross-sectional view taken along the line aa ′ in FIG. 6 has a shape in which a reinforcing rib 310 spaced a predetermined distance in the width direction is located inside the cell frame 130 formed along the outer circumferential surface thereof.
  • the rigid reinforcement portion 300 may be formed to extend in the longitudinal direction as shown in Figures 6 and 7, it is formed short and a plurality of the plurality is inserted spaced apart in the longitudinal direction on the lower side of the cell frame 130 It may also be in the form.
  • the partition 200 is formed of a polygonal frame, and when the unit cells 100 are stacked, the partitions 200 are sandwiched between the plurality of unit cells 100, and are formed in a rectangular frame like the cell frame 130, and reinforce the strength.
  • the reinforcing frame may be formed to be spaced apart a plurality of predetermined distance in the height direction.
  • a plurality of unit cells 100 and partitions 200 may be stacked to form a sub-battery module 10.
  • the first battery cell 110 may be formed.
  • Cell stack 130-second battery cell 120-partition 200-first battery cell 110-cell frame 130-second battery cell 120 Can be.
  • the sub battery module 10 is provided with an aluminum cover 400 on the surface located at both ends in the width direction can protect the sub battery module 10 from external impact.
  • the battery pack 1 of the present invention includes a first case 20 coupled to surround the negative electrode tab 141 on one side in the longitudinal direction of the sub battery module 10, and a positive electrode tab 142 on the other side. It is formed to include a second case 30.
  • the first case 20 and the second case 30 may be formed to accommodate only the region where the negative electrode tab 141 and the positive electrode tab 142 are formed, and the negative electrode tab 141 and the positive electrode in the sub battery module 10.
  • the tab 142 may be formed to surround both sides of the formed surface.
  • the battery pack 1 of the present invention in addition to the first case 20 and the second case 30, the lower case is formed to surround the other side except the upper side, and is coupled to the upper side
  • the upper case may be formed separately, and may be changed into various forms such as a lower case formed in a 'c' shape to surround both side surfaces and a lower side in the longitudinal direction, and an upper case coupled to the upper side.
  • the battery pack 1 of the present invention includes a first case 20, a second case 30, a sub battery module 10, and an aluminum cover 400.
  • the sub battery module 10 is formed by stacking a plurality of unit cells 100 and partitions 200 alternately, and an aluminum cover 400 is coupled to both sides in a width direction of the sub battery module 10. At this time, the negative electrode tab 141 and the positive electrode tab 142 are protruded on both sides in the longitudinal direction of the sub battery module 10.
  • the cathode bus bar 40 is electrically connected to an area where the positive electrode tab 142 protrudes, and the anode bus bar 50 is electrically connected to an area where the negative electrode tab 141 is protruded, thereby adjoining the unit cell 100. ) May be connected to one battery pack 1 is formed.
  • the plurality of unit cells 100 and the partitions 200 are inserted at both ends of the cell frames 130 and the partitions 200 in the longitudinal direction or the height direction of the plurality of unit cells 100 and the partitions 200. And may be combined with the neighboring unit cell 100 and the partition 200.
  • first case 20 and the second case 30 are respectively coupled to accommodate the negative electrode tab 141 and the positive electrode tab 142 formed on both sides in the longitudinal direction of the sub battery module 10.
  • the battery pack is formed by stacking battery cells of the type in which electrode tabs are formed at both sides in a horizontal direction, thereby preventing moisture from getting on the lower side and paralleling the air flow direction.
  • Arrangement has the advantage that can greatly improve the air-cooled cooling efficiency.
  • the battery pack of the present invention when laminated in a horizontal direction to configure the battery pack, in order to prevent the mounting rigid structure from weakening because the support structure of the lower end of the battery cell is conventionally dependent only on the thickness of the battery cell.
  • the rigidity reinforcing portion of the steel material may be inserted into the lower end of the cell frame provided between the pair of battery cells to reinforce the mounting rigidity structure.
  • the battery pack of the present invention has the advantage that the performance and safety of the secondary battery can be improved by improving the cooling efficiency and reinforcing the rigid structure.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Mounting, Suspending (AREA)

Description

전지팩Battery pack

본 발명은 전지팩에 관한 것으로, 더욱 상세하게 한 쌍의 배터리 셀 사이에 셀 프레임이 구비되어 배터리 셀의 하측에서 지지되되, 셀 프레임의 하측면 내부에 스틸 재질의 강성보강부가 삽입되어 배터리 셀의 마운팅 강성 구조가 보강되는 전지팩에 관한 것이다.The present invention relates to a battery pack, and more particularly, a cell frame is provided between a pair of battery cells to be supported from the lower side of the battery cell, and a rigid reinforcement part of a steel material is inserted into the lower side of the cell frame to provide a battery cell. The present invention relates to a battery pack in which a mounting rigid structure is reinforced.

최근, 충방전이 가능한 이차전지는 와이어리스 모바일 기기의 에너지원으로 광범위하게 사용되고 있다.Recently, secondary batteries capable of charging and discharging have been widely used as energy sources of wireless mobile devices.

또한, 이차전지는 화석 연료를 사용하는 기존의 가솔린 차량, 디젤 차량 등의 대기오염 등을 해결하기 위한 방안으로 제시되고 있는 전기자동차(EV), 하이브리드 전기자동차(HEV) 등의 동력원으로서도 주목받고 있다.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. .

소형 모바일 기기에서는 디바이스 1 대당 하나 또는 두서너 개의 배터리 셀들이 사용됨에 반하여, 자동차 등과 같은 중대형 디바이스에서는 고출력 대용량의 필요성으로 인해, 단위전지로서 다수의 배터리 셀을 전기적으로 연결한 중대형 전지팩이 사용된다.In a small mobile device, one or two or four battery cells are used per device, whereas in a medium and large device such as an automobile, a large and medium battery pack using a plurality of battery cells electrically connected as a unit cell is used due to the necessity of high output capacity.

중대형 전지팩은 가능하면 작은 크기와 중량으로 제조되는 것이 바람직하므로, 높은 집적도로 적층될 수 있고 용량 대비 중량이 작은 각형 전지, 파우치형 전지 등이 중대형 전지팩의 배터리 셀로서 주로 사용되고 있다. 그 중에서도, 중량이 작고 전해액의 누액 가능성이 적으며 제조비가 저렴한 파우치형 전지가 특히 많은 관심을 모으고 있다.Since medium and large battery packs are preferably manufactured in a small size and weight, square batteries, pouch-type batteries, etc., which can be stacked with high integration and have a small weight to capacity, are mainly used as battery cells of medium and large battery packs. Among them, a pouch-type battery having a small weight, a small possibility of leakage of an electrolyte solution, and a low manufacturing cost attracts much attention.

한편, 양측으로 전극 탭이 돌출된 형태를 갖는 단위전지를 갖는 전지팩은 상·하 적층식으로 구성될 경우, 단위전지 사이에 이격되어 공기가 통과할 수 있는 공간이 좌·우 방향으로 형성되어, 상·하 방향으로 유동되는 공기가 통과하기 어렵다는 단점이 있다.On the other hand, the battery pack having a unit cell having a form in which the electrode tab protrudes on both sides is formed in a vertical stack, the space is spaced between the unit cells to allow air to pass through the left and right directions are formed The disadvantage is that air flowing in the up and down directions is difficult to pass.

또한, 상·하 적층식의 전지팩은 바닥면에 위치한 단위전지에 습기가 차기 쉽고, 냉각이 잘 이루어지지 않아 스웰링 현상이라 단락현상 등 안전성에 문제가 발생될 수 있다는 단점이 있다.In addition, the battery pack of the top and bottom stack type is easy to be filled with moisture in the unit cell located on the bottom surface, the cooling is not made well because of the swelling phenomenon there is a disadvantage that may cause a safety problem such as short circuit phenomenon.

미국공개특허 제2012-0094166호(공개일2012.04.19, 명칭 : BATTERY MODULE HAVING HEAT DISSIPATION MEMBER OF NOVEL STRUCTURE AND BATTERY PACK EMPLOYED WITH THE SAME)에는 전지의 방열을 촉진하기 위해 방열부재가 전지셀 계면들에 개재되어 있고, 높은 열전도율의 방열부재와 일체로 연결된 열교환 부재가 전지셀 적층체의 일측에 부가된 구조로 이루어진 중대형 전지팩이 개시된 바 있다.US Patent Publication No. 2012-0094166 (published Apr. 19, 2012, NAME: BATTERY MODULE HAVING HEAT DISSIPATION MEMBER OF NOVEL STRUCTURE AND BATTERY PACK EMPLOYED WITH THE SAME) A medium-large battery pack has been disclosed, which is interposed and has a structure in which a heat exchange member connected integrally with a heat radiation member having a high thermal conductivity is added to one side of a battery cell stack.

하지만, 여전히 더 컴팩트하고, 강성을 보강될 수 있으며, 방열성능이 개선된 전지팩의 개발이 필요한 실정이다.However, there is still a need for the development of a battery pack that is more compact, can be reinforced with rigidity, and has improved heat dissipation performance.

본 발명은 상술한 바와 같은 문제점을 해결하기 위해 안출된 것으로서, 본 발명의 목적은 양측으로 전극 탭이 형성되는 타입의 배터리 셀이 수평방향으로 적층되도록 구성하여 공냉식 냉각이 원활하게 이루어지도록 하는 동시에, 배터리 셀의 마운팅 강성 구조를 보강할 수 있는 전지팩을 제공하는 것이다.The present invention has been made to solve the problems described above, the object of the present invention is to configure the battery cells of the type in which the electrode tabs are formed on both sides to be stacked in the horizontal direction to facilitate the air-cooled cooling, It is to provide a battery pack that can reinforce the mounting rigid structure of the battery cell.

본 발명의 전지팩은 내부에 셀 공간이 형성되며, 다각의 프레임으로 형성되는 셀 프레임과, 상기 셀 프레임의 일측면에 적층되는 제1배터리 셀, 상기 셀 프레임의 타측면에 적층되는 제2배터리 셀을 포함하는 적어도 하나 이상의 단위 셀; 및, 다각의 프레임으로 형성되어 상기 단위 셀 적층 시 복수의 단위 셀 사이에 끼워지는 파티션; 을 포함하여 형성되며, 상기 셀 프레임의 하측면 내부에는 스틸 재질의 강성보강부가 삽입되어 상기 제1배터리 셀 및 제2배터리 셀을 지지한다.In the battery pack of the present invention, a cell space is formed therein, a cell frame formed of a polygonal frame, a first battery cell stacked on one side of the cell frame, and a second battery stacked on the other side of the cell frame. At least one unit cell comprising a cell; And a partition formed of a plurality of frames and sandwiched between a plurality of unit cells when the unit cells are stacked. And a rigid reinforcement part of a steel material is inserted into the lower side of the cell frame to support the first battery cell and the second battery cell.

또한, 본 발명의 일실시예에 따른 상기 제1배터리 셀 및 제2배터리 셀은 길이방향으로 일측면에 음극 탭이 돌출형성되고, 타측면에 양극 탭이 돌출형성될 수 있다.In addition, the first battery cell and the second battery cell according to an embodiment of the present invention, the negative electrode tab protrudes on one side in the longitudinal direction, the positive electrode tab may protrude on the other side.

또한, 본 발명의 일실시예에 따른 전지팩은 상기 단위 셀 및 파티션이 복수개 적층되어 형성되는 서브 전지모듈의 길이방향으로 일측면에서 음극 탭을 감싸며 결합되는 제1케이스와, 타측면에서 양측 탭을 감싸며 결합되는 제2케이스를 포함하여 형성될 수 있다.In addition, the battery pack according to an embodiment of the present invention is a first case coupled to surround the negative electrode tab on one side in the longitudinal direction of the sub-battery module formed by stacking a plurality of unit cells and partitions, both tabs on the other side It may be formed including a second case that is coupled to surround.

또한, 본 발명의 일실시예에 따른 상기 전지팩은 상기 서브 전지모듈의 폭방향으로 양측면에 알루미늄 커버가 구비될 수 있다.In addition, the battery pack according to an embodiment of the present invention may be provided with aluminum covers on both sides in the width direction of the sub-battery module.

또한, 본 발명의 일실시예에 따른 상기 셀 프레임은 플라스틱 재질로 사출공정을 통해 제조되되, 하측면 내부에 스틸 재질의 강성보강부가 삽입되어 인서트사출을 통해 제조될 수 있다.In addition, the cell frame according to an embodiment of the present invention is manufactured through an injection process made of plastic material, the rigid reinforcement of the steel material is inserted into the lower side can be manufactured by insert injection.

또한, 본 발명의 일실시예에 따른 상기 전지팩은 상기 셀 프레임의 하측면에 상기 강성보강부가 삽입될 수 있도록 상기 강성보강부에 대응되는 형태로 함몰되는 안착홈이 형성될 수 있다.In addition, the battery pack according to an embodiment of the present invention may be formed in the recess recess recessed in the form corresponding to the rigid reinforcement portion to be inserted into the rigid reinforcement portion on the lower side of the cell frame.

또한, 본 발명의 일실시예에 따른 상기 전지팩은 상기 강성보강부의 양측 단부에 결합되어 상기 셀 프레임에 상기 강성보강부를 고정하는 체결수단을 포함하여 형성될 수 있다.In addition, the battery pack according to an embodiment of the present invention may be coupled to both ends of the rigid reinforcing portion may include a fastening means for fixing the rigid reinforcement to the cell frame.

또한, 본 발명의 일실시예에 따른 상기 강성보강부는 상기 셀 프레임의 길이방향으로 연장형성되며, 폭방향으로 일정거리 이격되어 형성되는 복수개의 보강리브를 포함하여 형성될 수 있다.In addition, the rigid reinforcing portion according to an embodiment of the present invention may be formed to include a plurality of reinforcing ribs are formed extending in the longitudinal direction of the cell frame, spaced apart a predetermined distance in the width direction.

본 발명의 전지팩은 양측으로 전극 탭이 형성되는 타입의 배터리 셀을 수평방향으로 적층하여 전지팩을 구성함으로써, 하측면에 습기가 차는 것을 방지하고, 공기가 유동되는 방향과 나란하게 배치하여 공냉식 냉각효율을 크게 향상시킬 수 있다는 장점이 있다.In the battery pack of the present invention, a battery pack of a type in which electrode tabs are formed at both sides in a horizontal direction is stacked to form a battery pack, thereby preventing moisture from getting on the lower side, and arranged in parallel with a direction in which air flows, thereby cooling the air. There is an advantage that can greatly improve the cooling efficiency.

이 때, 본 발명의 전지팩은 수평방향으로 적층하여 전지팩을 구성할 때, 배터리 셀의 하단부의 지지구조가 종래에 배터리 셀의 두께에만 의존되어 마운팅 강성구조가 약해지는 것을 방지하기 위해, 한 쌍의 배터리 셀 사이에 구비되는 셀 프레임의 하단부에 스틸 재질의 강성보강부를 삽입하여 마운팅 강성구조를 보강할 수 있다는 장점이 있다.In this case, when the battery pack of the present invention is laminated in a horizontal direction to configure the battery pack, in order to prevent the mounting rigid structure from weakening because the support structure of the lower end of the battery cell is conventionally dependent only on the thickness of the battery cell. There is an advantage that the mounting rigid structure can be reinforced by inserting a rigid reinforcement part made of steel to the lower end of the cell frame provided between the pair of battery cells.

또한, 본 발명의 전지팩은 냉각효율 향상 및 강성구조 보강을 통해, 이차전지의 성능 및 안전성을 향상시킬 수 있다는 장점이 있다.In addition, the battery pack of the present invention has the advantage that the performance and safety of the secondary battery can be improved by improving the cooling efficiency and reinforcing the rigid structure.

도 1은 배터리 셀 평면도.1 is a battery cell plan view.

도 2는 배터리 셀 적층 개념도.2 is a conceptual diagram of battery cell stacking;

도 3은 본 발명에 따른 전지팩 사시도.3 is a perspective view of a battery pack according to the present invention.

도 4는 본 발명에 따른 전지팩 분해사시도.Figure 4 is an exploded perspective view of a battery pack according to the present invention.

도 5는 본 발명에 따른 전지팩에 포함되는 서브 전지모듈의 분해사시도.5 is an exploded perspective view of a sub battery module included in a battery pack according to the present invention;

도 6은 본 발명에 따른 전지팩에 포함되는 셀 프레임의 사시도.6 is a perspective view of a cell frame included in a battery pack according to the present invention.

도 7은 본 발명에 따른 전지팩에 포함되는 셀 프레임의 분해사시도.7 is an exploded perspective view of a cell frame included in a battery pack according to the present invention.

도 8은 도 6에서의 aa’방향 단면도.FIG. 8 is a cross-sectional view along aa 'in FIG. 6; FIG.

이하, 상술한 바와 같은 특징을 가지는 본 발명에 따른 전지팩을 첨부된 도면을 참조로 상세히 설명한다.Hereinafter, a battery pack according to the present invention having the features as described above will be described in detail with reference to the accompanying drawings.

도 1은 배터리 셀 평면도이며, 도 2는 배터리 셀 적층 개념도이고, 도 3은 본 발명에 따른 전지팩 사시도이며, 도 4는 본 발명에 따른 전지팩 분해사시도이고, 도 5는 본 발명에 따른 전지팩에 포함되는 서브 전지모듈의 분해사시도이며, 도 6은 본 발명에 따른 전지팩에 포함되는 셀 프레임의 사시도이고, 도 7은 본 발명에 따른 전지팩에 포함되는 셀 프레임의 분해사시도이며, 도 8은 도 6에서의 aa’방향 단면도이다.1 is a plan view of a battery cell, Figure 2 is a schematic diagram of a battery cell stack, Figure 3 is a perspective view of a battery pack according to the present invention, Figure 4 is an exploded perspective view of a battery pack according to the present invention, Figure 5 is a battery according to the present invention 6 is an exploded perspective view of a sub-battery module included in a pack, FIG. 6 is a perspective view of a cell frame included in a battery pack according to the present invention, and FIG. 7 is an exploded perspective view of a cell frame included in a battery pack according to the present invention. 8 is aa 'direction sectional drawing in FIG.

본 발명의 일실시예에 따른 전지팩(1)은 크게, 단위 셀(100), 파티션(200), 제1케이스(20) 및 제2케이스(30) 및 알루미늄 커버(400)를 포함하여 형성된다.The battery pack 1 according to an embodiment of the present invention is largely formed by including a unit cell 100, a partition 200, a first case 20, a second case 30, and an aluminum cover 400. do.

단위 셀(100)은 셀 프레임(130), 제1배터리 셀(110) 및 제2배터리 셀(120)을 포함하여 형성된다. 제1배터리 셀(110) 및 제2배터리 셀(120)은 전지부(140), 파우치(150), 양극 탭(142) 및 음극 탭(141)을 포함하여 형성된다.The unit cell 100 is formed to include a cell frame 130, a first battery cell 110, and a second battery cell 120. The first battery cell 110 and the second battery cell 120 are formed to include the battery unit 140, the pouch 150, the positive electrode tab 142, and the negative electrode tab 141.

전지부(140)는 양극판(144), 분리막, 음극판(143) 순으로 배치되어 일방향으로 와인딩되거나, 양극판(144), 분리막, 음극판(143)이 복수개 적층되어 형성될 수 있으며, 양극판(144)은 양극 탭(142)과 전기적으로 연결되어 일측으로 돌출형성되고, 음극판(143)은 음극 탭(141)과 전기적으로 연결되어 타측으로 돌출형성된다.The battery unit 140 may be disposed in the order of the positive electrode plate 144, the separator and the negative electrode plate 143 to be wound in one direction, or may be formed by stacking a plurality of the positive electrode plate 144, the separator and the negative electrode plate 143, and the positive electrode plate 144. Is electrically connected to the positive electrode tab 142 to protrude to one side, and the negative electrode plate 143 is electrically connected to the negative electrode tab 141 to protrude to the other side.

이 때, 양극 탭(142) 및 음극 탭(141)은 파우치(150)의 길이방향 양측으로 각각 돌출형성되는 것으로 도시되어 있으나, 일측에 양극 탭(142) 및 음극 탭(141)이 돌출된 형태 등, 다양하게 변경실시 가능하다.In this case, the positive electrode tab 142 and the negative electrode tab 141 are shown to protrude to both sides of the pouch 150 in the longitudinal direction, respectively, but the positive electrode tab 142 and the negative electrode tab 141 protrude from one side. Various modifications can be made.

파우치(150)는 후막의 금속재로 성형된 원통형이나 각형으로 된 캔 구조와는 달리, 중간층이 금속 호일이고, 금속 호일의 양면에 부착되는 내피층 및 외피층이 절연성 필름으로 이루어진 파우치(150)형 케이스이다.The pouch 150 is unlike a cylindrical or rectangular can structure formed of a thick metal material, and the intermediate layer is a metal foil, and the pouch 150 type case is formed of an insulating film with an inner film and an outer layer attached to both sides of the metal foil. to be.

셀 프레임(130)은 제1배터리 셀(110) 및 제2배터리 셀(120)의 폭방향으로 돌출되는 전지부(140)가 수용될 수 있도록 전지부(140)에 대응되는 형태로 내부 일정영역이 중공되어 다각의 프레임으로 형성된다.The cell frame 130 corresponds to the battery unit 140 so that the battery unit 140 protruding in the width direction of the first battery cell 110 and the second battery cell 120 may be accommodated. It is hollow and formed into a polygonal frame.

도 5에 도시된 바와 같이, 셀 프레임(130)은 제1배터리 셀(110) 및 제2배터리 셀(120)과 전지부(140)가 사각형으로 형성될 때, 이에 대응되도록 내부에 사각형의 중공부(132)가 형성되어 ‘ㅁ’자 형태로 형성될 수 있다.As shown in FIG. 5, when the first battery cell 110, the second battery cell 120, and the battery unit 140 are formed in a quadrangular shape, the cell frame 130 has a hollow hollow inside to correspond thereto. The portion 132 may be formed to have a 'ㅁ' shape.

셀 프레임(130)은 제1배터리 셀(110) 및 제2배터리 셀(120) 적층 시, 공차관리가 용이해지도록 유연한 이중합성고무(Ethylene Propylene Diene M-class rubber)재질로 이루어질 수 있다.The cell frame 130 may be made of a flexible ethylene propylene (M-class rubber) material to facilitate tolerance management when the first battery cell 110 and the second battery cell 120 are stacked.

단위셀은 셀프레임(130)의 일측면에 제1배터리 셀(110)이 적층되고, 타측면에 제2배터리 셀(120)이 적층되어 형성되며, 제1배터리 셀(110)의 전지부(140)와 제2배터리 셀(120)의 전지부(140)가 셀 프레임(130)의 중공부(132)에 삽입되어 지지 및 고정된다.The unit cell is formed by stacking the first battery cell 110 on one side of the cell frame 130 and stacking of the second battery cell 120 on the other side of the unit frame, and the battery unit of the first battery cell 110 ( 140 and the battery unit 140 of the second battery cell 120 is inserted into the hollow portion 132 of the cell frame 130 to be supported and fixed.

특히 본 발명의 전지팩(1)은 셀 프레임(130)의 하측면 내부에 스틸 재질의 강성보강부(300)가 삽입되어 제1배터리 셀(110) 및 제2배터리 셀(120)의 하측면을 지지하게 된다.In particular, the battery pack 1 of the present invention is inserted into the rigid reinforcement portion 300 of the steel material in the lower side of the cell frame 130 to the lower side of the first battery cell 110 and the second battery cell 120. Will be supported.

도 7에 도시된 바와 같이, 셀 프레임(130)에는 하측면에 강성보강부(300)가 삽입결합될 수 있도록 강성보강부(300)에 대응되는 형태로 함몰되는 안착홈(131)이 형성되고, 강성보강부(300)가 필요에 따라 탈착가능하도록 형성될 수도 있다.As illustrated in FIG. 7, the cell frame 130 is provided with a mounting recess 131 recessed in a shape corresponding to the rigid reinforcement 300 so that the rigid reinforcement 300 may be inserted into the lower side. The steel part 300 may be formed to be detachable as necessary.

이 때, 셀 프레임(130)은 강성보강부(300)의 양측 단부에 결합되어 강성보강부(300)가 고정되도록 하는 체결수단(500)을 포함하여 형성될 수 있다.At this time, the cell frame 130 may be formed to include a fastening means 500 is coupled to both ends of the rigid reinforcement portion 300 to the rigid reinforcement portion 300 is fixed.

도 7에 도시된 바와 같이, 셀 프레임(130)은 하측면의 양측단부에 높이방향으로 상ㆍ하 관통형성되는 제1삽입홀(530)이 형성되고, 제1삽입홀(530)에 대응되는 위치의 강성보강부(300) 양측에 제2삽입홀(540)이 형성될 수 있다.As shown in FIG. 7, the cell frame 130 is formed with first insertion holes 530 which are formed to penetrate up and down in the height direction at both end portions of the lower surface, and correspond to the first insertion holes 530. Second insertion holes 540 may be formed at both sides of the rigid reinforcement part 300 at the position.

셀 프레임(130)은 하측에 강성보강부(300)가 삽입된 다음, 제1삽입홀(530) 내에 삽입된 제2삽입홀(540)에 볼트(510)가 삽입되고, 삽입된 면과 반대되는 타측면에서 볼트(510)의 단부에 너트(520)가 결합되어 고정될 수 있다.In the cell frame 130, the rigid reinforcement part 300 is inserted at a lower side thereof, and then the bolt 510 is inserted into the second insertion hole 540 inserted into the first insertion hole 530, and is opposite to the inserted surface. The nut 520 may be coupled to and fixed to an end of the bolt 510 on the other side.

제2삽입홀(540)은 볼트(510)가 삽입되는 입구에 위치된 영역에 볼트(510) 머리에 대응되는 형태로 탭 가공되어 볼트(510)가 강성보강부(300)의 외측으로 튀어나오지 않고 내부에 삽입되어 결합될 수있도록 하는 것이 바람직하다.The second insertion hole 540 is tapped in a shape corresponding to the head of the bolt 510 in the region located at the inlet where the bolt 510 is inserted, so that the bolt 510 does not protrude out of the rigid reinforcement part 300. It is desirable to be able to be inserted therein and combined.

이 외에도, 강성보강부(300)는 셀 프레임(130)에 삽입되어 접촉되는 면적에 접착제가 도포되어 고정될 수도 있으며, 셀 프레임(130) 및 강성보강부(300)가 결합되는 방법은 다양하게 변경실시 가능하다.In addition, the rigid reinforcement unit 300 is inserted into the cell frame 130 may be fixed by applying an adhesive to the area in contact with, the method of combining the cell frame 130 and the rigid reinforcement unit 300 is variously modified. It is possible.

또 다른 실시예로, 셀 프레임(130)은 플라스틱 재질로 사출공정을 통해 제조되되, 하측면 내부에 스틸 재질의 강성보강부(300)가 삽입되어 인서트 사출을 통해 일체로 형성될 수도 있다.In another embodiment, the cell frame 130 is manufactured through an injection process made of plastic, and the rigid reinforcement 300 of steel material is inserted into the lower side to be integrally formed by insert injection.

이 경우, 셀 프레임(130)은 강성보강부(300)를 별도로 결합하는 과정이 필요없어 조립이 간편해질 수 있다는 장점이 있다.In this case, the cell frame 130 has an advantage that the assembly can be simplified because there is no need to separately process the rigid reinforcement unit 300.

한편, 강성보강부(300)는 셀 프레임(130)의 길이방향으로 연장형성되며, 폭방향으로 일정거리 이격되어 형성되는 복수개의 보강리브(310)를 포함하여 형성될 수 있다.On the other hand, the rigid reinforcing portion 300 is formed extending in the longitudinal direction of the cell frame 130, it may be formed including a plurality of reinforcing ribs 310 formed to be spaced apart a predetermined distance in the width direction.

도 8에 도시된 바와 같이, 도 6에서 aa’ 방향으로의 단면도는 외주면을 따라 형성된 셀 프레임(130) 내부에 폭방향으로 일정거리 이격되는 보강리브(310)가 내부에 위치되는 형태를 갖는다.As illustrated in FIG. 8, the cross-sectional view taken along the line aa ′ in FIG. 6 has a shape in which a reinforcing rib 310 spaced a predetermined distance in the width direction is located inside the cell frame 130 formed along the outer circumferential surface thereof.

강성보강부(300)는 도6 및 도 7에 도시된 것처럼 길이방향으로 길게 연장형성되는 형태일 수도 있으며, 짧게 형성되어 복수개가 셀 프레임(130)의 하측면에 길이방향으로 일정거리 이격되어 삽입되는 형태일 수도 있다.The rigid reinforcement portion 300 may be formed to extend in the longitudinal direction as shown in Figures 6 and 7, it is formed short and a plurality of the plurality is inserted spaced apart in the longitudinal direction on the lower side of the cell frame 130 It may also be in the form.

파티션(200)은 다각의 프레임으로 형성되어 단위 셀(100)이 적층될 때, 복수의 단위 셀(100) 사이에 끼워지며, 셀 프레임(130)과 마찬가지로 사각의 프레임으로 형성되고, 강도 보강을 위한 보강 프레임이 높이방향으로 복수개 일정거리 이격되어 형성될 수 있다.The partition 200 is formed of a polygonal frame, and when the unit cells 100 are stacked, the partitions 200 are sandwiched between the plurality of unit cells 100, and are formed in a rectangular frame like the cell frame 130, and reinforce the strength. The reinforcing frame may be formed to be spaced apart a plurality of predetermined distance in the height direction.

본 발명의 전지팩(1)은 단위 셀(100) 및 파티션(200)이 복수개 적층되어 서브 전지모듈(10)이 형성될 수 있는데, 도 5에 도시된 바와 같이, ‘제1배터리 셀(110)- 셀 프레임(130)-제2배터리 셀(120)-파티션(200)-제1배터리 셀(110)-셀 프레임(130)-제2배터리 셀(120)’의 순서로 반복 적층형성될 수 있다.In the battery pack 1 of the present invention, a plurality of unit cells 100 and partitions 200 may be stacked to form a sub-battery module 10. As shown in FIG. 5, the first battery cell 110 may be formed. Cell stack 130-second battery cell 120-partition 200-first battery cell 110-cell frame 130-second battery cell 120 Can be.

이 때, 서브 전지모듈(10)은 폭방향으로 양측 단부에 위치한 면에 알루미늄 커버(400)가 구비되어 외부 충격으로부터 서브 전지모듈(10)을 보호할 수 있다.At this time, the sub battery module 10 is provided with an aluminum cover 400 on the surface located at both ends in the width direction can protect the sub battery module 10 from external impact.

본 발명의 전지팩(1)은 서브 전지모듈(10)의 길이방향으로 일측면에서 음극 탭(141)을 감싸며 결합되는 제1케이스(20)와, 타측면에서 양극 탭(142)을 감싸며 결합되는 제2케이스(30)를 포함하여 형성된다.The battery pack 1 of the present invention includes a first case 20 coupled to surround the negative electrode tab 141 on one side in the longitudinal direction of the sub battery module 10, and a positive electrode tab 142 on the other side. It is formed to include a second case 30.

제1케이스(20) 및 제2케이스(30)는 음극 탭(141) 및 양극 탭(142)이 형성된 영역만 수용되도록 형성될 수도 있으며, 서브 전지모듈(10)에서 음극 탭(141) 및 양극 탭(142)이 형성된 양측 면을 모두 감싸도록 형성될 수도 있다.The first case 20 and the second case 30 may be formed to accommodate only the region where the negative electrode tab 141 and the positive electrode tab 142 are formed, and the negative electrode tab 141 and the positive electrode in the sub battery module 10. The tab 142 may be formed to surround both sides of the formed surface.

또한, 본 발명의 전지팩(1)은 제1케이스(20) 및 제2케이스(30)로 분리된 형태 외에도, 상측면을 제외한 나머지 면을 감싸도록 형성되는 하부케이스와, 상측면에 결합되는 상부케이스가 별도로 형성된 형태일 수도 있으며, 길이방향으로 양측면 및 하측면을 감싸도록 ‘ㄷ’자 형태로 형성된 하부케이스와, 상측면에 결합되는 상부케이스로 이루어진 형태 등 다양한 형태로 변경실시 가능하다.In addition, the battery pack 1 of the present invention, in addition to the first case 20 and the second case 30, the lower case is formed to surround the other side except the upper side, and is coupled to the upper side The upper case may be formed separately, and may be changed into various forms such as a lower case formed in a 'c' shape to surround both side surfaces and a lower side in the longitudinal direction, and an upper case coupled to the upper side.

도 4를 참고로 본 발명의 전지팩(1)을 설명하면,Referring to Figure 4 battery pack 1 of the present invention,

본 발명의 전지팩(1)은 제1케이스(20), 제2케이스(30), 서브 전지모듈(10), 알루미늄 커버(400)를 포함하여 형성된다.The battery pack 1 of the present invention includes a first case 20, a second case 30, a sub battery module 10, and an aluminum cover 400.

서브 전지모듈(10)은 복수개의 단위 셀(100)과 파티션(200)이 교번되어 적층 형성되고, 서브 전지모듈(10)의 폭 방향으로 양측면에는 알루미늄 커버(400)가 결합된다. 이 때, 서브 전지모듈(10)의 길이방향으로 양측면에 음극 탭(141) 및 양극 탭(142)이 돌출형성된다.The sub battery module 10 is formed by stacking a plurality of unit cells 100 and partitions 200 alternately, and an aluminum cover 400 is coupled to both sides in a width direction of the sub battery module 10. At this time, the negative electrode tab 141 and the positive electrode tab 142 are protruded on both sides in the longitudinal direction of the sub battery module 10.

양극 탭(142)이 돌출된 영역에는 캐소드 버스바(40)가 전기적으로 연결되며, 및 음극 탭(141)이 돌출된 영역에는 애노드 버스바(50)가 전기적으로 연결되어 이웃한 단위 셀(100)과 연결되어 하나의 전지팩(1)이 형성되도록 할 수 있다.The cathode bus bar 40 is electrically connected to an area where the positive electrode tab 142 protrudes, and the anode bus bar 50 is electrically connected to an area where the negative electrode tab 141 is protruded, thereby adjoining the unit cell 100. ) May be connected to one battery pack 1 is formed.

이 때, 복수개의 단위 셀(100) 및 파티션(200)은 셀 프레임(130) 및 파티션(200)의 길이방향 또는 높이방향으로 양단에 형성된 (133) 롱볼트(60)(long bolt)가 삽입되어 이웃한 단위 셀(100) 및 파티션(200)과 결합될 수있다.In this case, the plurality of unit cells 100 and the partitions 200 are inserted at both ends of the cell frames 130 and the partitions 200 in the longitudinal direction or the height direction of the plurality of unit cells 100 and the partitions 200. And may be combined with the neighboring unit cell 100 and the partition 200.

마지막으로, 서브 전지모듈(10)의 길이방향으로 양측면에 형성된 음극 탭(141) 및 양극 탭(142)이 수용되도록 제1케이스(20) 및 제2케이스(30)가 각각 결합된다.Finally, the first case 20 and the second case 30 are respectively coupled to accommodate the negative electrode tab 141 and the positive electrode tab 142 formed on both sides in the longitudinal direction of the sub battery module 10.

이에 따라, 본 발명의 전지팩은 양측으로 전극 탭이 형성되는 타입의 배터리 셀을 수평방향으로 적층하여 전지팩을 구성함으로써, 하측면에 습기가 차는 것을 방지하고, 공기가 유동되는 방향과 나란하게 배치하여 공냉식 냉각효율을 크게 향상시킬 수 있다는 장점이 있다.Accordingly, in the battery pack of the present invention, the battery pack is formed by stacking battery cells of the type in which electrode tabs are formed at both sides in a horizontal direction, thereby preventing moisture from getting on the lower side and paralleling the air flow direction. Arrangement has the advantage that can greatly improve the air-cooled cooling efficiency.

이 때, 본 발명의 전지팩은 수평방향으로 적층하여 전지팩을 구성할 때, 배터리 셀의 하단부의 지지구조가 종래에 배터리 셀의 두께에만 의존되어 마운팅 강성구조가 약해지는 것을 방지하기 위해, 한 쌍의 배터리 셀 사이에 구비되는 셀 프레임의 하단부에 스틸 재질의 강성보강부를 삽입하여 마운팅 강성구조를 보강할 수 있다.In this case, when the battery pack of the present invention is laminated in a horizontal direction to configure the battery pack, in order to prevent the mounting rigid structure from weakening because the support structure of the lower end of the battery cell is conventionally dependent only on the thickness of the battery cell. The rigidity reinforcing portion of the steel material may be inserted into the lower end of the cell frame provided between the pair of battery cells to reinforce the mounting rigidity structure.

또한, 본 발명의 전지팩은 냉각효율 향상 및 강성구조 보강을 통해, 이차전지의 성능 및 안전성을 향상시킬 수 있다는 장점이 있다.In addition, the battery pack of the present invention has the advantage that the performance and safety of the secondary battery can be improved by improving the cooling efficiency and reinforcing the rigid structure.

본 발명은 상기한 실시 예에 한정되지 아니하며, 적용범위가 다양함은 물론이고, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이다.The present invention is not limited to the above-described embodiments, and the scope of application of the present invention is not limited to those of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made.

Claims (8)

전지팩에 있어서,In the battery pack, 내부에 셀 공간이 형성되며, 다각의 프레임으로 형성되는 셀 프레임과, 상기 셀 프레임의 일측면에 적층되는 제1배터리 셀, 상기 셀 프레임의 타측면에 적층되는 제2배터리 셀을 포함하는 적어도 하나 이상의 단위 셀; 및At least one comprising a cell space formed therein, a cell frame formed of a polygonal frame, a first battery cell stacked on one side of the cell frame, and a second battery cell stacked on the other side of the cell frame. More than one unit cell; And 다각의 프레임으로 형성되어 상기 단위 셀 적층 시 복수의 단위 셀 사이에 끼워지는 파티션; 을 포함하여 형성되며, A partition formed of a plurality of frames and sandwiched between a plurality of unit cells when the unit cells are stacked; It is formed to include, 상기 셀 프레임의 하측면 내부에는 스틸 재질의 강성보강부가 삽입되어 상기 제1배터리 셀 및 제2배터리 셀을 지지하는 것을 특징으로 하는 전지팩.The battery pack, characterized in that the rigid reinforcing portion of the steel material is inserted into the lower side of the cell frame to support the first battery cell and the second battery cell. 제 1항에 있어서,상기 제1배터리 셀 및 제2배터리 셀은The method of claim 1, wherein the first battery cell and the second battery cell 길이방향으로 일측면에 음극 탭이 돌출형성되고, 타측면에 양극 탭이 돌출형성되는 것을 특징으로 하는 전지팩.The battery pack, characterized in that the negative electrode tab protrudes on one side in the longitudinal direction, the positive electrode tab protrudes on the other side. 제 2항에 있어서,The method of claim 2, 상기 전지팩은The battery pack is 상기 단위 셀 및 파티션이 복수개 적층되어 형성되는 서브 전지모듈의 길이방향으로 일측면에서 음극 탭을 감싸며 결합되는 제1케이스와, 타측면에서 양극 탭을 감싸며 결합되는 제2케이스를 포함하여 형성되는 것을 특징으로 하는 전지팩.And a first case coupled to surround the negative electrode tab in one side of the sub battery module formed by stacking a plurality of unit cells and partitions, and a second case coupled to surround the positive electrode tab in the other side thereof. A battery pack characterized by the above. 제 3항에 있어서,The method of claim 3, wherein 상기 전지팩은The battery pack is 상기 서브 전지모듈의 폭방향으로 양측면에 알루미늄 커버가 구비되는 것을 특징으로 하는 전지팩.The battery pack, characterized in that the aluminum cover is provided on both sides in the width direction of the sub-battery module. 제 1항에 있어서,The method of claim 1, 상기 셀 프레임은The cell frame is 플라스틱 재질로 사출공정을 통해 제조되되,Manufactured by plastic injection molding process, 하측면 내부에 스틸 재질의 강성보강부가 삽입되어 인서트사출을 통해 제조되는 것을 특징으로 하는 전지팩.The battery pack, characterized in that the rigid reinforcement of the steel material is inserted into the lower side is manufactured by insert injection. 제 1항에 있어서,The method of claim 1, 상기 전지팩은The battery pack is 상기 셀 프레임의 하측면에 상기 강성보강부가 삽입될 수 있도록The rigid reinforcement part may be inserted into the lower side of the cell frame. 상기 강성보강부에 대응되는 형태로 함몰되는 안착홈이 형성되는 것을 특징으로 하는 전지팩.The battery pack, characterized in that the recessed groove is formed in a form corresponding to the rigid reinforcing portion. 제 6항에 있어서,The method of claim 6, 상기 전지팩은The battery pack is 상기 강성보강부의 양측 단부에 결합되어 상기 셀프레임에 상기 강성보강부를 고정하는 체결수단을 포함하여 형성되는 것을 특징으로 하는 전지팩.Battery pack, characterized in that it is coupled to both ends of the rigid reinforcement portion including a fastening means for fixing the rigid reinforcement to the cell frame. 제 1항에 있어서,The method of claim 1, 상기 강성보강부는The rigid reinforcing part 상기 셀 프레임의 길이방향으로 연장형성되며, 폭방향으로 일정거리 이격되어 형성되는 복수개의 보강리브를 포함하여 형성되는 것을 특징으로 하는 전지팩.The battery pack is formed extending in the longitudinal direction of the cell frame, including a plurality of reinforcing ribs formed to be spaced apart a predetermined distance in the width direction.
PCT/KR2013/005532 2012-06-25 2013-06-24 Battery pack Ceased WO2014003382A1 (en)

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