WO2014182122A1 - Battery module and battery pack having same - Google Patents

Battery module and battery pack having same Download PDF

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Publication number
WO2014182122A1
WO2014182122A1 PCT/KR2014/004154 KR2014004154W WO2014182122A1 WO 2014182122 A1 WO2014182122 A1 WO 2014182122A1 KR 2014004154 W KR2014004154 W KR 2014004154W WO 2014182122 A1 WO2014182122 A1 WO 2014182122A1
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Prior art keywords
battery
battery module
present
battery pack
bent portion
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PCT/KR2014/004154
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French (fr)
Korean (ko)
Inventor
홍영진
이영재
김재규
이재훈
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주식회사 오렌지파워
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Publication of WO2014182122A1 publication Critical patent/WO2014182122A1/en

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    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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 module, and a battery pack having the same, and more particularly, a plurality of unit cells are interconnected by sharing one outer circumferential surface, wherein the shared outer circumferential surface includes a bent portion, And it relates to a battery pack having the same.
  • a secondary battery which is a kind of energy storage device capable of charging and discharging, has been widely used as an energy source of wireless mobile devices.
  • EVs electric vehicles
  • HEV hybrid electric vehicles
  • a solution for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuel is proposed.
  • Small and mobile devices use one or two or four battery units 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 units due to the need for high output and large capacity.
  • the medium-large battery pack is usually composed of a plurality of battery units connected in series.
  • the secondary battery is manufactured in various shapes such as a cylindrical shape and a square shape.
  • Each of the battery units is electrically connected to a current collector of a positive electrode plate and a negative electrode plate provided with an electrode assembly in which a positive electrode and a negative electrode are disposed with a separator interposed therebetween, a case including a receiving unit in which the electrode assembly is embedded, and the positive and negative electrode plates of the electrode assembly.
  • each battery unit cross-aligns the unit cells such that the protruding positive electrode terminal and the negative electrode terminal are alternated with the positive electrode terminal and the negative electrode terminal of the neighboring battery unit, and a nut is provided between the screwed negative electrode terminal and the positive electrode terminal.
  • the battery pack is constructed by connecting and installing conductors.
  • the battery pack forms a single battery pack by connecting several to many dozen battery units.
  • Korean Patent Laid-Open Publication No. 10-2010-0026612 provides a battery pack for connecting a plurality of battery units in series, but the increase in volume of such a battery pack causes an increase in the volume of an external device to which the battery pack is applied. Will be generated.
  • the battery pack is applied as a high-capacity secondary battery for driving a motor of an electric vacuum cleaner, an electric scooter, or an automobile (electric vehicle or a hybrid vehicle)
  • it is necessary to minimize the volume of the battery pack because the installation space of the battery pack is narrow. There is this.
  • An object of the present invention is to provide a battery module having a new structure in which a plurality of unit cells are interconnected in a new manner in order to solve the above problems.
  • Another object of the present invention is to provide a battery pack comprising the battery module according to the present invention.
  • the present invention provides a battery module, characterized in that a plurality of unit cells are interconnected by sharing one outer peripheral surface of the case, the shared outer peripheral surface includes a bent portion in order to solve the above problems.
  • the width S x of the bent portion satisfies the relationship between the height B y of the unit cell and B y ⁇ S x ⁇ 3B y .
  • the bent portion is characterized in that it comprises a bending line, punching line or groove.
  • the bent portion may further include a voltage sensing unit.
  • the shared outer peripheral surface further comprises a terminal connection portion.
  • the battery module is characterized in that it comprises two electrodes per unit cell.
  • the battery module is characterized in that it comprises zero or one electrode per unit cell.
  • the present invention also provides a battery pack comprising the battery module according to the present invention.
  • the battery pack of the present invention it is characterized in that a plurality of battery modules bent the bent portion is stacked.
  • a plurality of unit cells may be interconnected in a new manner to exhibit high voltage and high output capacity, and the plurality of battery modules may be compactly stacked by the above structure, so that the battery module may be compact, lightweight, and high in volume efficiency. It may be prepared as a battery pack having.
  • FIG. 1 is a schematic view of a battery module according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a battery pack accommodated in a battery case according to another embodiment of the present invention, two battery units are connected in series.
  • 3 and 4 show how the battery pack according to the invention is stacked.
  • FIG. 5 is a schematic diagram illustrating a battery pack accommodated in a battery case according to another embodiment of the present invention and a battery pack connected to a battery unit in series, and measuring a voltage thereof.
  • 1 and 2 show a schematic view of the battery module according to the present invention.
  • a plurality of unit cells 300a and 300b are connected to each other while sharing one outer circumferential surface 210a and 210b of the case, and the shared outer circumferential surface is It characterized in that it comprises a bent portion (220).
  • the bent portion 220 is formed on the outer circumferential surface shared by the plurality of batteries, the plurality of pouches 210 are connected to each other by sharing one outer circumferential surface including the bent portion. ) May be bent in a zigzag form with respect to one outer circumferential surface including the bent portion, and may be stacked in a bent state.
  • the plurality of unit cells 300a and 300b when the plurality of unit cells 300a and 300b are bent by the bent portion 220, the plurality of unit cells 300a and 300b connected to each other have a structure in which the plurality of unit cells 300a and 300b are closely connected to each other. It is preferable in terms of reducing the volume. Therefore, the width S x of the bent portion 220 is too wide. The height B y and B y of the unit cell 300 are too wide. ⁇ S x ⁇ 3B y relationship.
  • the bent portion 220 is characterized in that it comprises a bending line, punching line or groove to facilitate the bending of the unit cells that are adjacent to each other.
  • the bent portion when the plurality of unit cells 300a and 300b are bent and stacked, the bent portion includes the bent line, the punching line, or the recess, and the like. On the basis of the bending it is possible not to apply stress to the periphery.
  • the connection part 240 may be prevented from being exposed to the outside and the insulation of the outer circumferential surface of the pouch 210 may be secured.
  • the shape of the bending line, punching line or groove portion can be all round, elliptical, wedge or polygonal, the shape is not limited.
  • the battery module according to the present invention may include two electrodes per unit cell constituting the battery module.
  • 1 illustrates a case where a plurality of unit cells 300a and 300b are connected in parallel including two electrodes 410a, 420a, 410a, and 410b including separate positive and negative electrodes.
  • the outer circumferential surface of the case shared by the plurality of unit cells further includes a terminal connection part 240.
  • a plurality of unit cells included in the battery module may be connected to each other by the terminal connecting unit 240 to form a single battery as a whole.
  • the connection between the unit cells through the terminal connection means that the negative electrode / anode terminal included in the unit cell is directly connected to the positive electrode / negative electrode terminal of the neighboring unit pouch.
  • the series connection between the unit cells through the terminal connection unit forms a direct connection between the negative terminal of the unit cell 300a and the terminal connection unit 240 to form the positive terminal of the neighboring unit cell 300b. it means.
  • the connection between the unit cells through the terminal connecting portion may be formed by heat-sealing the bent portion 220 together with the terminal connecting portion 240 in a state in which the electrode assembly is accommodated in a plurality of unit pouches, This is not restrictive.
  • the unit cells 300a and 300b may be interconnected by the terminal connection part 240 included in the shared outer circumferential surface, and as shown in FIG.
  • the entire battery module includes two electrodes including one electrode 410a and 410b per unit cell to be configured, or as shown in FIG. 3, the unit cell connected to the middle part includes an electrode that protrudes to the outside. Or zero electrodes.
  • the present invention also provides a battery pack comprising the battery module according to the present invention.
  • the battery pack according to the present invention is characterized in that a plurality of battery modules bent the bent portion is stacked.
  • the bent portion may be bent, and a plurality of the battery modules may be stacked to form a battery pack.
  • 3 and 4 illustrate a method in which battery modules according to the present invention are stacked.
  • the battery according to the present invention can exhibit high voltage and high output large capacity, and is manufactured as a battery pack 100 having a high efficiency for volume by having a compact structure.
  • one unit cell 300 is a lithium secondary battery generating an electromotive force of about 3.6 V
  • the battery module 100 includes four unit cells and the unit cells are connected in series, approximately 14.4
  • An electromotive force of V produces excellent performance in HEVs or EVs where high operating voltages are required.
  • the pouches 210 each serve as a diaphragm for physically separating the plurality of unit cells 300 from each other, the assembling process is very simple and easy, and thus, the process efficiency is excellent.
  • the bent portion 220 may further include a voltage sensing unit 230.
  • the meter reading means 510 having a probe part is brought into contact with the terminal connection part 240 through a voltage sensing unit 230 including the bent part, and another probe having a probe part is provided.
  • the electrical characteristic value between the meter reading means 510 can be measured.
  • the electrical characteristic value may be a voltage, a current, or a resistance, and typically measures the voltage across the plurality of battery units 300 connected in series.
  • the unit cell 300 includes all devices that undergo an electrochemical reaction, and may be a primary cell, a secondary cell, a fuel cell, a solar cell, or a capacitor, and the like.
  • the secondary battery may be a lithium secondary battery, for example, a lithium metal secondary battery, a lithium ion secondary battery, or a lithium polymer secondary battery.
  • Pouch 210 bend 220, voltage sensing 230, terminal connection 240,
  • Terminal 400 Positive Terminal 410
  • Negative Terminal 420
  • a plurality of unit cells may be interconnected in a new manner to exhibit high voltage and high output capacity, and the plurality of battery modules may be compactly stacked by the above structure so that the battery module may be compact, lightweight, and have high volumetric efficiency. It may be prepared as a battery pack having.

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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)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The present invention relates to a battery module and a battery pack having the same and, more specifically, to a battery module in which a plurality of unit cells are connected to each other by sharing one outer circumferential surface wherein the shared outer circumferential surface includes a curved section, and a battery pack having the same. The battery module, according to the present invention, can exhibit high voltage, high power, and high capacity by connecting the plurality of unit cells to each other in a novel way, and can be manufactured as a battery pack which is small, lightweight, and has high efficiency compared to the volume thereof since a plurality of battery modules can be compactly stacked according to the aforementioned structure.

Description

전지 모듈, 및 이를 구비하는 전지팩Battery module, and battery pack having same
본 발명은 전지 모듈, 및 이를 구비하는 전지팩에 관한 것으로서, 더욱 상세하게는 복수개의 단위 전지가 일 외주면을 공유하여 상호 연결되고, 상기 공유하는 외주면이 절곡부를 포함하는 것을 특징으로 하는 전지 모듈, 및 이를 구비하는 전지팩에 관한 것이다. The present invention relates to a battery module, and a battery pack having the same, and more particularly, a plurality of unit cells are interconnected by sharing one outer circumferential surface, wherein the shared outer circumferential surface includes a bent portion, And it relates to a battery pack having the same.
최근 충방전이 가능한 에너지 저장 장치의 일종인 이차 전지는 와이어리스 모바일 기기의 에너지원으로 광범위하게 사용되고 있다. 또한, 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.Recently, a secondary battery, which is a kind of energy storage device capable of charging and discharging, has been widely used as an energy source of wireless mobile devices. In addition, it is attracting attention as a power source of electric vehicles (EVs), hybrid electric vehicles (HEV), etc., which is proposed as a solution for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuel.
소형 모바일 기기들에는 디바이스 1대당 하나 또는 두서너 개의 전지 유닛들이 사용됨에 반하여, 자동차 등과 같은 중대형 디바이스에는 고출력 대용량의 필요성으로 인해 다수의 전지 유닛을 전기적으로 연결한 중대형 전지팩이 사용된다.Small and mobile devices use one or two or four battery units 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 units due to the need for high output and large capacity.
이와 같이 중대형 전지팩은 통상 직렬로 연결되는 복수개의 전지 유닛으로 이루어진다. 상기 이차 전지는 원통형, 각형과 같이 여러 가지 형상으로 제조되고 있다. 상기 각각의 전지 유닛은 양극과 음극이 세퍼레이터를 사이에 두고 위치하는 전극조립체와, 상기 전극조립체가 내장되는 수용부를 구비하는 케이스와, 상기 전극조립체에 구비된 양, 음극판의 집전체와 전기적으로 연결되는 양, 음극단자/단자를 포함한다. 상기 각각의 전지 유닛은 각형 전지의 경우 돌출된 양극단자 및 음극단자가 이웃하는 전지 유닛의 양극단자 및 음극단자와 엇갈리도록 각 단위전지를 교차 배열하고, 나사 가공된 음극단자와 양극단자간에 너트를 매개로 도전체를 연결 설치하여 전지팩을 구성하게 된다. As such, the medium-large battery pack is usually composed of a plurality of battery units connected in series. The secondary battery is manufactured in various shapes such as a cylindrical shape and a square shape. Each of the battery units is electrically connected to a current collector of a positive electrode plate and a negative electrode plate provided with an electrode assembly in which a positive electrode and a negative electrode are disposed with a separator interposed therebetween, a case including a receiving unit in which the electrode assembly is embedded, and the positive and negative electrode plates of the electrode assembly. Amount, including the negative terminal / terminal. In the case of the rectangular battery, each battery unit cross-aligns the unit cells such that the protruding positive electrode terminal and the negative electrode terminal are alternated with the positive electrode terminal and the negative electrode terminal of the neighboring battery unit, and a nut is provided between the screwed negative electrode terminal and the positive electrode terminal. The battery pack is constructed by connecting and installing conductors.
상기 전지팩은 수 개에서 많게는 수십 개의 전지 유닛을 연결시켜 하나의 전지팩을 구성하게 된다. 대한민국 특허공개 10-2010-0026612호에서는 복수개의 전지 유닛을 직렬 연결하는 전지팩을 제공하고 있으나, 이러한 전지팩의 부피 증가는 전지팩이 적용되는 외부 기기의 부피 증가를 야기하게 되어 설계상의 제약을 발생시키게 된다. 특히, 상기 전지팩이 전동 청소기, 전동 스쿠터나 자동차용(전기 자동차 또는 하이브리드 자동차)의 모터 구동을 위한 대용량 이차 전지로서 적용되는 경우 전지팩의 설치 공간이 협소하기 때문에 전지팩의 부피를 최소화할 필요성이 있다.The battery pack forms a single battery pack by connecting several to many dozen battery units. Korean Patent Laid-Open Publication No. 10-2010-0026612 provides a battery pack for connecting a plurality of battery units in series, but the increase in volume of such a battery pack causes an increase in the volume of an external device to which the battery pack is applied. Will be generated. In particular, when the battery pack is applied as a high-capacity secondary battery for driving a motor of an electric vacuum cleaner, an electric scooter, or an automobile (electric vehicle or a hybrid vehicle), it is necessary to minimize the volume of the battery pack because the installation space of the battery pack is narrow. There is this.
전지팩의 크기와 중량은 상기 중대형 디바이스의 수용 공간 및 출력 등과 직접적인 관련성이 있으므로, 제조업체들은 가능한 소형이면서 경량의 전지팩을 제조하려고 노력하고 있다. 따라서, 고출력 대용량의 전력을 얻기 위하여 다수의 전지 유닛들로 구성된 중대형 전지팩을 효과적으로 연결하여, 안전성을 유지하면서 부피를 최소화시킬 수 있는 기술의 필요성이 매우 높은 실정이다.Since the size and weight of the battery pack are directly related to the accommodation space and output of the medium and large devices, manufacturers are trying to manufacture battery packs as small and lightweight as possible. Therefore, there is a very high need for a technology capable of minimizing volume while maintaining safety by effectively connecting a medium-large battery pack composed of a plurality of battery units to obtain a high output large capacity power.
본 발명은 상기와 같은 과제를 해결하기 위하여, 복수개의 단위 전지가 새로운 방식으로 상호 연결되는 새로운 구조의 전지 모듈을 제공하는 것을 목적으로 한다. An object of the present invention is to provide a battery module having a new structure in which a plurality of unit cells are interconnected in a new manner in order to solve the above problems.
본 발명은 또한, 본 발명에 의한 전지 모듈을 포함하는 전지팩을 제공하는 것을 목적으로 한다.Another object of the present invention is to provide a battery pack comprising the battery module according to the present invention.
본 발명은 상기와 같은 과제를 해결하기 위하여, 복수개의 단위 전지가 케이스의 일 외주면을 공유하여 상호 연결되고, 상기 공유하는 외주면이 절곡부를 포함하는 것을 특징으로 하는 전지 모듈를 제공한다.The present invention provides a battery module, characterized in that a plurality of unit cells are interconnected by sharing one outer peripheral surface of the case, the shared outer peripheral surface includes a bent portion in order to solve the above problems.
본 발명에 있어서, 상기 절곡부의 폭(Sx)은 상기 단위 전지의 높이(By)와 By ≤ Sx ≤ 3By 관계를 만족하는 것을 특징으로 한다.In the present invention, the width S x of the bent portion satisfies the relationship between the height B y of the unit cell and B y ≤ S x ≤ 3B y .
본 발명에 있어서, 상기 절곡부는 절곡라인, 펀칭라인 또는 요홈부를 포함하는 것을 특징으로 한다.In the present invention, the bent portion is characterized in that it comprises a bending line, punching line or groove.
본 발명에 있어서, 상기 절곡부는 전압 센싱부를 추가로 포함할 수 있다.In the present invention, the bent portion may further include a voltage sensing unit.
본 발명에 있어서, 상기 공유하는 외주면이 단자연결부를 더 포함하는 것을 특징으로 한다. In the present invention, the shared outer peripheral surface further comprises a terminal connection portion.
본 발명에 있어서, 상기 전지 모듈은 상기 단위 전지당 2개의 전극을 포함하는 것을 특징으로 한다. In the present invention, the battery module is characterized in that it comprises two electrodes per unit cell.
본 발명에 있어서, 상기 전지 모듈은 상기 단위 전지당 0 개 또는 1개의 전극을 포함하는 것을 특징으로 한다. In the present invention, the battery module is characterized in that it comprises zero or one electrode per unit cell.
본 발명은 또한, 본 발명에 의한 전지 모듈을 포함하는 전지팩을 제공한다.The present invention also provides a battery pack comprising the battery module according to the present invention.
본 발명의 전지팩에 있어서, 상기 절곡부가 절곡된 복수개의 전지 모듈이 적층되는 것을 특징으로 한다.In the battery pack of the present invention, it is characterized in that a plurality of battery modules bent the bent portion is stacked.
본 발명에 의한 전지 모듈은 복수개의 단위 전지가 새로운 방식으로 상호 연결되어 고전압 및 고출력 대용량을 발휘할 수 있고, 상기 구조에 의해 복수개의 전지 모듈이 컴팩트하게 적층될 수 있어 소형, 경량이면서 부피 대비 높은 효율성을 가지는 전지팩으로 제조될 수 있다.In the battery module according to the present invention, a plurality of unit cells may be interconnected in a new manner to exhibit high voltage and high output capacity, and the plurality of battery modules may be compactly stacked by the above structure, so that the battery module may be compact, lightweight, and high in volume efficiency. It may be prepared as a battery pack having.
도 1은 본 발명의 일 실시예에 따른 전지 모듈의 모식도이다.1 is a schematic view of a battery module according to an embodiment of the present invention.
도 2는 본 발명의 다른 일 실시예에 따른 전지케이스에 수용되고, 두개의 전지 유닛이 직렬 연결되는 전지팩의 모식도이다.Figure 2 is a schematic diagram of a battery pack accommodated in a battery case according to another embodiment of the present invention, two battery units are connected in series.
도 3 및 도 4는 본 발명에 따른 전지팩이 적층되는 방식을 나타낸다.3 and 4 show how the battery pack according to the invention is stacked.
도 5는 본 발명의 또 다른 일 실시예에 따른 전지케이스에 수용되고, 전지 유닛이 직렬 연결되는 전지팩, 이의 전압을 측정하는 단계를 나타낸 모식도이다.FIG. 5 is a schematic diagram illustrating a battery pack accommodated in a battery case according to another embodiment of the present invention and a battery pack connected to a battery unit in series, and measuring a voltage thereof.
이하에서는 본 발명을 도면에 의하여 더욱 상세히 설명한다. Hereinafter, the present invention will be described in more detail with reference to the drawings.
도 1 및 도 2는 본 발명에 의한 전지 모듈의 모식도를 나타낸다. 도 1 및 도 2를 참조하면, 본 발명에 의한 전지 모듈(100)은 복수개의 단위 전지(300a, 300b)가 케이스의 일 외주면(210a, 210b)을 공유하면서 상호 연결되고, 상기 공유하는 외주면이 절곡부(220)를 포함하는 것을 특징으로 한다. 1 and 2 show a schematic view of the battery module according to the present invention. 1 and 2, in the battery module 100 according to the present invention, a plurality of unit cells 300a and 300b are connected to each other while sharing one outer circumferential surface 210a and 210b of the case, and the shared outer circumferential surface is It characterized in that it comprises a bent portion (220).
본 발명에 의한 전지 모듈에 있어서,상기 복수개의 단지 전지가 상호 공유하는 외주면에 절곡부(220)가 형성되어 유연성을 갖기 때문에, 상기 절곡부를 포함하는 일 외주면을 공유하여 연결되는 복수개의 파우치(210)는 상기 절곡부를 포함하는 일 외주면을 경계로 지그재그 형태로 절곡될 수 있고, 절곡된 상태로 적층되는 것이 가능하다. In the battery module according to the present invention, since the bent portion 220 is formed on the outer circumferential surface shared by the plurality of batteries, the plurality of pouches 210 are connected to each other by sharing one outer circumferential surface including the bent portion. ) May be bent in a zigzag form with respect to one outer circumferential surface including the bent portion, and may be stacked in a bent state.
본 발명에 의한 전지 모듈에 있어서, 상기 복수개의 단위 전지(300a, 300b)가 상기 절곡부(220)에 의하여 절곡되는 경우 상호 연결된 복수의 단위 전지(300a, 300b)가 최대한 밀착된 구조를 가지는 것이 부피를 줄이는 면에서 바람직하다. 따라서, 상기 절곡부(220)의 폭(Sx)은 너무 넓상기 단위 전지(300)의 높이(By)와 By ≤ Sx ≤ 3By 관계를 만족하는 것을 특징으로 한다. In the battery module according to the present invention, when the plurality of unit cells 300a and 300b are bent by the bent portion 220, the plurality of unit cells 300a and 300b connected to each other have a structure in which the plurality of unit cells 300a and 300b are closely connected to each other. It is preferable in terms of reducing the volume. Therefore, the width S x of the bent portion 220 is too wide. The height B y and B y of the unit cell 300 are too wide. ≤ S x ≤ 3B y relationship.
본 발명에 의한 전지 모듈에 있어서, 상기 절곡부(220)는 이웃하여 상호 연결되는 단위 전지의 절곡을 용이하게 하기 위하여 절곡라인, 펀칭라인 또는 요홈부를 포함하는 것을 특징으로 한다. In the battery module according to the present invention, the bent portion 220 is characterized in that it comprises a bending line, punching line or groove to facilitate the bending of the unit cells that are adjacent to each other.
본 발명에 의한 전지 모듈은 복수의 단위 전지(300a, 300b)을 상기 절곡부(200)를 절곡하여 적층시 상기 절곡부가 상기 절곡라인, 펀칭라인 또는 요홈부 등을 포함함으로써 상기 절곡부(200)를 기준으로 절곡시 주변부에 응력을 가하지 않는 것이 가능하다. 또한, 절곡라인, 펀칭라인 또는 요홈부를 포함함으로써, 단위 전지가 큰 부피를 가지더라도 절곡부를 절곡시키는 힘에 의해 절곡부(220)의 횡방향으로 미세한 균열이 발생하지는 것을 줄일 수 있으므로, 후술하는 단자 연결부(240)가 외부로 노출되는 현상을 방지하고 파우치(210)의 외주면의 절연성을 확보할 수 있다. 본 발명에 있어서, 상기 절곡라인, 펀칭라인 또는 요홈부의 형상은 원형, 타원형, 쐐기형 또는 다각형이 모두 가능하며, 형상이 제한되지 아니한다. In the battery module according to the present invention, when the plurality of unit cells 300a and 300b are bent and stacked, the bent portion includes the bent line, the punching line, or the recess, and the like. On the basis of the bending it is possible not to apply stress to the periphery. In addition, by including a bent line, punching line or groove portion, even if the unit cell has a large volume, it is possible to reduce the occurrence of minute cracks in the lateral direction of the bent portion 220 by the force to bend the bent portion, the terminal described later The connection part 240 may be prevented from being exposed to the outside and the insulation of the outer circumferential surface of the pouch 210 may be secured. In the present invention, the shape of the bending line, punching line or groove portion can be all round, elliptical, wedge or polygonal, the shape is not limited.
본 발명에 의한 전지 모듈은 상기 전지 모듈을 구성하는 단위 전지당 2개의 전극을 포함하는 것이 가능하다. 도 1은 복수의 단위 전지(300a, 300b)는 별도의 양극, 음극을 포함하는 2개의 전극(410a, 420a, 410a, 410b)를 포함하여 병렬 연결되는 경우를 나타내었다. The battery module according to the present invention may include two electrodes per unit cell constituting the battery module. 1 illustrates a case where a plurality of unit cells 300a and 300b are connected in parallel including two electrodes 410a, 420a, 410a, and 410b including separate positive and negative electrodes.
본 발명에 의한 전지 모듈에 있어서, 상기 복수개의 단위 전지가 공유하는 케이스의 외주면은 단자연결부(240)를 더 포함하는 것을 특징으로 한다. In the battery module according to the present invention, the outer circumferential surface of the case shared by the plurality of unit cells further includes a terminal connection part 240.
본 발명에 의한 전지 모듈에 있어서, 상기 전지 모듈이 포함하는 복수개의 단위 전지는 상기 단자연결부(240)에 의해 이웃하는 단위 전지가 상호 연결되어 전체가 하나의 전지를 형성하는 것이 가능하다. In the battery module according to the present invention, a plurality of unit cells included in the battery module may be connected to each other by the terminal connecting unit 240 to form a single battery as a whole.
본 발명에 있어서, 상기 단자연결부를 통한 단위 전지간 연결은 단위 전지가 포함하는 음극/양극단자가 이웃하는 단위 파우치의 양극/음극 단자와 직접 접속되는 것을 의미한다. 도 2를 참조하면, 상기 단자연결부를 통한 단위 전지간의 직렬 연결은 단위 전지(300a)의 음극단자가 이웃하는 단위 전지(300b)의 양극단자와 단자연결부(240)를 형성하며 직접 접속하는 형태를 의미한다. 본 발명에 있어서, 상기 단자연결부를 통한 상기 단위 전지간의 연결은 복수의 단위 파우치 내에 전극조립체를 수납한 상태에서 상기 절곡부(220)를 단자 연결부(240)와 함께 열융착하여 형성할 수 있으며, 이에 제한되지 아니한다.In the present invention, the connection between the unit cells through the terminal connection means that the negative electrode / anode terminal included in the unit cell is directly connected to the positive electrode / negative electrode terminal of the neighboring unit pouch. Referring to FIG. 2, the series connection between the unit cells through the terminal connection unit forms a direct connection between the negative terminal of the unit cell 300a and the terminal connection unit 240 to form the positive terminal of the neighboring unit cell 300b. it means. In the present invention, the connection between the unit cells through the terminal connecting portion may be formed by heat-sealing the bent portion 220 together with the terminal connecting portion 240 in a state in which the electrode assembly is accommodated in a plurality of unit pouches, This is not restrictive.
본 발명에 의한 전지 모듈은, 상기 공유하는 외주면이 포함하는 단자연결부(240)에 의하여 단위 전지(300a, 300b)가 상호 연결될 수 있으며, 연결되는 방식에 따라 도 2에 나타낸 바와 같이 상기 전지 모듈을 구성하는 단위 전지당 하나의 전극(410a, 410b)를 포함하여 전체 전지 모듈이 2개의 전극을 포함하도록 구성하거나, 도 3에서 보는 바와 같이 중간 부분에 연결되는 단위 전지는 외부로 돌출되는 전극을 포함하지 않는, 즉 0 개의 전극을 포함할 수 있다. In the battery module according to the present invention, the unit cells 300a and 300b may be interconnected by the terminal connection part 240 included in the shared outer circumferential surface, and as shown in FIG. The entire battery module includes two electrodes including one electrode 410a and 410b per unit cell to be configured, or as shown in FIG. 3, the unit cell connected to the middle part includes an electrode that protrudes to the outside. Or zero electrodes.
본 발명은 또한, 본 발명에 의한 전지 모듈을 포함하는 전지팩을 제공한다. 본 발명에 의한 전지팩은 상기 절곡부가 절곡된 복수개의 전지 모듈이 적층되는 것을 특징으로 한다. 본 발명에 의한 전지 모듈은 절곡부가 절곡되고 복수개가 적층되어 전지팩을 형성하는 것이 가능하다. 도 3 및 도 4는 본 발명에 의한 전지 모듈이 적층되는 방식을 나타내었다. The present invention also provides a battery pack comprising the battery module according to the present invention. The battery pack according to the present invention is characterized in that a plurality of battery modules bent the bent portion is stacked. In the battery module according to the present invention, the bent portion may be bent, and a plurality of the battery modules may be stacked to form a battery pack. 3 and 4 illustrate a method in which battery modules according to the present invention are stacked.
본 발명에 의한 전지 모듈은 이와 같이 적층되어 전지팩을 구성함으로써 본 발명에 의한 전지는 고전압 및 고출력 대용량을 발휘할 수 있고, 컴팩트한 구조를 가짐으로써 부피 대비 높은 효율성을 가지는 전지팩(100)으로 제조될 수 있다. 예를 들어, 하나의 단위 전지(300)가 약 3.6V 전후의 기전력을 발생시키는 리튬 이차전지이고, 상기 전지 모듈(100)이 4 개의 단위 전지를 포함하고 상기 단위 전지가 직렬 연결되는 경우 대략 14.4V의 기전력이 발생하므로 작동 전압이 높게 요구되는 HEV 또는 EV 에서 우수한 성능을 발휘할 수 있다. By stacking the battery modules according to the present invention constitute a battery pack, the battery according to the present invention can exhibit high voltage and high output large capacity, and is manufactured as a battery pack 100 having a high efficiency for volume by having a compact structure. Can be. For example, when one unit cell 300 is a lithium secondary battery generating an electromotive force of about 3.6 V, and the battery module 100 includes four unit cells and the unit cells are connected in series, approximately 14.4 An electromotive force of V produces excellent performance in HEVs or EVs where high operating voltages are required.
더욱이, 복수개의 단위 전지(300) 상호간을 물리적으로 분리하기 위한 격막의 역할을 각각 파우치(210)가 수행하고 있어, 조립 공정이 매우 간단하고 용이하므로 공정 효율성이 우수하다는 장점이 있다. In addition, since the pouches 210 each serve as a diaphragm for physically separating the plurality of unit cells 300 from each other, the assembling process is very simple and easy, and thus, the process efficiency is excellent.
본 발명에 있어서, 상기 절곡부(220)는 전압 센싱부(230)를 추가로 포함할 수 있다. In the present invention, the bent portion 220 may further include a voltage sensing unit 230.
본 발명의 일 실시예에 의한 전압 센싱부(230)를 이용하여 전압을 측정하는 단계를 도 5에 모식적으로 도시하였다. 도 5 에서 보는 바와 같이 본 발명의 일 실시예에서, 탐침부를 가지는 검침수단(510)을 상기 절곡부가 포함하는 전압 센싱부(230)를 통하여 단자 연결부(240)에 접촉시키고, 탐침부를 가지는 다른 검침수단(510)을 양극단자(410a) 또는 음극단자(420b)에 접촉시킴으로써, 검침수단(510) 간의 전기적 특성 값을 측정할 수 있다. 상기 전기적 특성 값은 전압, 전류 또는 저항일 수 있으며, 통상적으로 직렬 연결된 복수의 전지 유닛(300)들 양단의 전압을 측정할 수 있다. 5 illustrates a step of measuring a voltage by using the voltage sensing unit 230 according to an embodiment of the present invention. As shown in FIG. 5, in one embodiment of the present invention, the meter reading means 510 having a probe part is brought into contact with the terminal connection part 240 through a voltage sensing unit 230 including the bent part, and another probe having a probe part is provided. By contacting the means 510 with the positive electrode terminal 410a or the negative electrode terminal 420b, the electrical characteristic value between the meter reading means 510 can be measured. The electrical characteristic value may be a voltage, a current, or a resistance, and typically measures the voltage across the plurality of battery units 300 connected in series.
본 발명에 있어서, 상기 단위 전지(300)는 전기 화학 반응을 하는 모든 소자를 포함하며, 1차 전지, 2차 전지, 연료 전지, 태양 전지 또는 캐퍼시터(capacitor) 등 일 수 있으며, 이에 제한되지 아니한다. 특히, 이차 전지 중 리튬 이차전지일 수 있고, 예를 들어 리튬 금속 이차전지, 리튬 이온 이차전지, 또는 리튬 폴리머 이차전지 일 수 있다. In the present invention, the unit cell 300 includes all devices that undergo an electrochemical reaction, and may be a primary cell, a secondary cell, a fuel cell, a solar cell, or a capacitor, and the like. . In particular, the secondary battery may be a lithium secondary battery, for example, a lithium metal secondary battery, a lithium ion secondary battery, or a lithium polymer secondary battery.
상술한 본 발명의 기술적 구성은 본 발명이 속하는 기술분야의 통상의 기술자가 본 발명의 그 기술적 사상이나 필수적 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시예는 모든 면에서 예시적인 것이며 한정적인 것이 아닌 것으로 이해되어야 한다. 아울러, 본 발명의 범위는 상기의 상세한 설명보다는 후술하는 특허청구범위에 의하여 나타내어진다. 또한, 특허청구범위의 의미 및 범위 그리고 그 등가 개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.It will be appreciated that the technical configuration of the present invention described above may be implemented in other specific forms by those skilled in the art without changing the technical spirit or essential features of the present invention. Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive. In addition, the scope of the present invention is indicated by the appended claims rather than the detailed description above. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.
- 부호의 설명Description of the sign
전지팩 100 Battery Pack 100
전지케이스 200 Battery case 200
파우치 210, 절곡부 220, 전압 센싱부 230, 단자 연결부 240, Pouch 210, bend 220, voltage sensing 230, terminal connection 240,
절곡라인, 펀칭라인 또는 요홈부 250Bending Lines, Punching Lines or Grooves 250
전지 유닛 300Battery unit 300
단자 400, 양극단자 410, 음극단자 420Terminal 400, Positive Terminal 410, Negative Terminal 420
측정장치 500, 검침수단 510Measuring device 500, meter reading means 510
본 발명에 의한 전지 모듈은 복수개의 단위 전지가 새로운 방식으로 상호 연결되어 고전압 및 고출력 대용량을 발휘할 수 있고, 상기 구조에 의해 복수개의 전지 모듈이 컴팩트하게 적층될 수 있어 소형, 경량이면서 부피 대비 높은 효율성을 가지는 전지팩으로 제조될 수 있다.In the battery module according to the present invention, a plurality of unit cells may be interconnected in a new manner to exhibit high voltage and high output capacity, and the plurality of battery modules may be compactly stacked by the above structure so that the battery module may be compact, lightweight, and have high volumetric efficiency. It may be prepared as a battery pack having.

Claims (9)

  1. 복수개의 단위 전지가 케이스의 일 외주면을 공유하여 상호 연결되고, 상기 공유하는 외주면이 절곡부를 포함하는 것을 특징으로 하는 전지 모듈. A plurality of unit cells are interconnected by sharing one outer peripheral surface of the case, wherein the shared outer peripheral surface includes a bent portion.
  2. 제1항에 있어서,The method of claim 1,
    상기 절곡부의 폭(Sx)은 상기 단위 전지의 높이(By)와 By ≤ Sx ≤ 3By 관계를 만족하는 것을 특징으로 하는 전지 모듈. The width (S x ) of the bent portion satisfies the relationship between the height (B y ) and B y ≤ S x ≤ 3B y of the unit cell.
  3. 제1항에 있어서,The method of claim 1,
    상기 절곡부는 절곡라인, 펀칭라인 또는 요홈부를 포함하는 것을 특징으로 하는 전지 모듈. The bent portion battery module, characterized in that it comprises a bending line, punching line or groove.
  4. 제1항에 있어서,The method of claim 1,
    상기 절곡부는 전압 센싱부를 더 포함하는 것을 특징으로 하는 전지 모듈. The bending part further comprises a voltage sensing unit.
  5. 제 1 항에 있어서,The method of claim 1,
    상기 공유하는 외주면이 단자연결부를 더 포함하는 것을 특징으로 하는 전지 모듈. The shared outer peripheral surface of the battery module further comprises a terminal connection portion.
  6. 제 1 항에 있어서,The method of claim 1,
    상기 전지 모듈은 상기 단위 전지당 2개의 전극을 포함하는 것을 특징으로 하는 전지 모듈. The battery module is characterized in that it comprises two electrodes per unit cell.
  7. 제 1 항에 있어서,The method of claim 1,
    상기 전지 모듈은 상기 단위 전지당 0 개 또는 1개의 전극을 포함하는 것을 특징으로 하는 전지 모듈. The battery module comprises a zero or one electrode per unit cell.
  8. 제 1 항 내지 제 7 항 중 어느 한 항에 따른 전지 모듈을 포함하는 전지팩.A battery pack comprising the battery module according to any one of claims 1 to 7.
  9. 제 8 항에 있어서,The method of claim 8,
    상기 전지팩은 상기 절곡부가 절곡된 복수개의 전지 모듈이 적층되는 것인 전지팩.The battery pack is a battery pack in which a plurality of battery modules bent the bent portion is stacked.
PCT/KR2014/004154 2013-05-10 2014-05-09 Battery module and battery pack having same WO2014182122A1 (en)

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KR20130053297A KR101485180B1 (en) 2013-05-10 2013-05-10 Battery module comprising several unit batteries, and battery pack including the same
KR10-2013-0053297 2013-05-10

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