WO2013081407A1 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
WO2013081407A1
WO2013081407A1 PCT/KR2012/010286 KR2012010286W WO2013081407A1 WO 2013081407 A1 WO2013081407 A1 WO 2013081407A1 KR 2012010286 W KR2012010286 W KR 2012010286W WO 2013081407 A1 WO2013081407 A1 WO 2013081407A1
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WO
WIPO (PCT)
Prior art keywords
connector
electrode tabs
electrode tab
battery pack
bent
Prior art date
Application number
PCT/KR2012/010286
Other languages
French (fr)
Korean (ko)
Inventor
박성철
권오성
조경민
Original Assignee
에스케이이노베이션 주식회사
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Publication of WO2013081407A1 publication Critical patent/WO2013081407A1/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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/204—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
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
    • H01M50/50—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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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 having a plurality of battery cells and a connector.
  • secondary batteries unlike primary batteries, are capable of charging and discharging, and thus are applied to various industrial fields such as digital cameras, mobile phones, laptops, and hybrid vehicles.
  • Secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries.
  • a lithium secondary battery is mainly used as a power source of an electric vehicle or a hybrid vehicle, and a large capacity battery pack configured by connecting a plurality of high-output battery cells or cell modules in series is used because it requires a large power such as a motor drive. It is common.
  • the battery pack includes a plurality of battery cells connected in series as in Korean Patent Application No. 10-2004-0099303.
  • the battery pack has a case 10 and a pole plate group 20 which is located inside the case 10 and is composed of a positive electrode plate, a negative electrode plate, and a separator to generate electrical energy by an electrochemical reaction.
  • the positive electrode connecting member 21 which is electrically connected to the positive electrode plate of the electrode plate group 20 and transmitted to the positive electrode terminal 30, and electrically connected to the negative electrode plate of the electrode plate group 20 is connected to the negative electrode terminal 40. It has a cathode connecting member for transmitting.
  • the battery pack includes a plurality of battery cells therein, and electrode tabs (commonly called 'electrode tabs' or 'cell tabs') of each battery cell are electrically connected to the connector.
  • electrode tabs commonly called 'electrode tabs' or 'cell tabs'
  • the electrical connection work between the electrode tab and the connector is placed between the connector and the connector, and the parts protruding outward of the connector (usually the upper part of the electrode tab) are bent in the direction of the connector and connected and fixed by welding. .
  • the present invention facilitates the operation of connecting the electrode tab and the connector and bends smoothly when the electrode tab is bent in the direction of the connector, so that the ground plane of the connector and the electrode tab can be secured widely to enable a smooth flow of current, and the welding is robust.
  • the purpose is to provide a battery pack that can be made possible.
  • the elastic pressure portion is bent and elastically positioned outside the connector to press the side of the electrode tab located between the connector and the connector to hold the electrode tab to connect the electrode tab and the connector by the electrode tab
  • bent in the direction of the connector is bent smoothly to ensure a wider connector and ground plane and to facilitate welding.
  • the battery pack of the present invention has a plurality of battery cells arranged side by side with a pair of electrode tabs consisting of a negative electrode tab and a positive electrode tab.
  • the electrode tabs are interposed between the electrode tabs of neighboring battery cells, and the electrode tabs are bent and electrically connected to each other, and an elastic pressing portion for pressing the electrode tabs by elasticity by bending is formed at a portion facing the electrode tabs. It has a connector.
  • the elastic pressing portion is bent and elastically positioned outside to press the side of the electrode tab positioned between the connector and the connector to hold the electrode tab and the electrode tab and the connector It can be bent smoothly when the electrode tab located between the connector and the connector to be connected in the direction of the connector to be connected to the connector, and can be bent to secure the connector and the ground plane in the bending of the electrode tab, so that the connection work such as welding is easy. There is a characteristic.
  • FIG. 1 is a schematic diagram illustrating a conventional battery pack structure
  • FIG. 2 is a schematic view for explaining the operation of the connector which is a component of the present invention
  • FIG 3 is an exemplary view of a connector to which the technical spirit of the present invention is applied.
  • Figure 4 is a perspective view for explaining a battery pack to which the present invention is applied
  • FIG. 5 is an exploded perspective view for explaining a battery pack to which the present invention is applied;
  • the present invention relates to a secondary battery battery pack consisting of a plurality of battery cells and a connector.
  • the battery pack of the present invention also has a plurality of battery cells 100 arranged side by side with a pair of electrode tabs 110 formed of a negative electrode tab 112 and a positive electrode tab 111, as in the prior art.
  • the electrode tabs 110 are interposed between the electrode tabs 110 of neighboring battery cells 100, and the electrode tabs 110 are bent and then contacted and electrically connected to each other.
  • the voltage sensing line 300 connected to one side of the connector 200 may be provided.
  • one side of the connector 200 is connected to the connection member of the connector 200 and the other side of the voltage sensing line 300 is connected to the electrode tabs 110 of the battery cell 100 and the voltage sensing line ( 300 may have a form in which the fuse 400 is electrically connected.
  • the battery cell 100 may be formed of an electrode tab 110 so that electricity flows to one side of an electrode body 113, which is a part generating electricity by being made of a positive electrode, a negative electrode, an electrolyte, and a separator.
  • the electrode tab 110 is made of a positive electrode tab 111 and the negative electrode tab 112, it is preferably a conductive metal material, a flexible material that is easy to bend.
  • the plurality of battery cells 100 as described above are arranged side by side at a predetermined interval, and the connector 200 is interposed between the electrode tabs 110 of the battery cells 100 adjacent to each other.
  • the neighboring battery cells 100 are alternately arranged such that the positive electrode tab 111 and the negative electrode tab 112 face each other, and the connector 200 is interposed therebetween.
  • the present invention facilitates the operation of connecting the electrode tab 110 and the connector 200, and smoothly bent when the electrode tab 110 is bent in the direction of the connector 200, so that the connector 200 and the electrode tab 110 are connected to each other. It is an object of the present invention to provide a battery pack having a connector that can ensure a wide ground plane to allow a smooth flow of current and enable a solid welding.
  • the inventor of the present application smoothly so that the ground plane with the connector 200 wide when the connector 200 bends the electrode tab 110 in the direction of the connector 200 by pressing and fixing the electrode tab 110. It is bent and does not move even when the connection work such as welding, so the work is easy to devise a structure.
  • the elastic pressing part 250 for pressing the electrode tab 110 is formed in the portion of the connector 200 facing the electrode tab 110 by being elastic, for example, due to bending.
  • the electrode tab 110 is fixed so as not to move by the pressure of the pressing unit 250.
  • the shape of the connector 200 having such an elastic pressing unit 250 depends on the specification of the battery pack, it can be applied to a connector of various specifications.
  • the connector 200 may be implemented in various forms as shown in FIG. 3.
  • the elastic pressing unit 250 as described above may have a bent portion of the connector 200 facing the electrode tab 110 so that the portion contacting the electrode tab 110 may have elasticity.
  • a part of the elastic body may be the elastic pressing part 250 through a method of insert injection such that the plate spring-type elastic body is fixed to the outside of the connector 200 to be integrally fixed.
  • the aforementioned elastic pressing part 250 is formed in plural in the longitudinal direction of the connector 200 as shown in FIG. 3.
  • the elastic pressing unit 250 is formed on the left and right sides of the connector 200, but is long in the longitudinal direction of the connector, so that one elastic pressing unit is formed on the left and right sides of the connector 200, respectively. Since there is a disadvantage in that it does not correspond smoothly to the positive electrode tab 111 or the negative electrode tab 112, a plurality of small elastic pressing parts are provided in the longitudinal direction of the connector 200. Corresponding to (111), and some of the elastic pressing unit to press the negative electrode tab 112.)
  • the positive electrode tab 111 and the negative electrode tab 112 of neighboring battery cells 100 are in contact with the first connection member 221 formed on the upper surface of the connector 200 so as to be energized. It is preferable to be bent toward the member 221 and then joined by laser or ultrasonic welding.
  • the electrode tab 110 is preferably bent in the direction of the connector 200 and welded in contact with the connector 200 to be connected to the connector 200.
  • Only one connector 200 which is a component of the present invention, is interposed between a pair of battery cells 100 adjacent to each other.
  • the pair of battery cells 100 facing each other is composed of two pairs of electrode tabs 110 so that the positive electrode tab 111 and the negative electrode tab 112 face each other.
  • the connector 200 is interposed and coupled to the first connection member 221 of the connector 200.
  • the other pair of electrode tabs 110 are coupled to the first connection member 221 of the connector 200 interposed between the electrode tabs 110 of the neighboring battery cell 100.
  • the connector 200 may be zigzag interposed between the several battery cells 100 and the electrode tabs 110 may be connected in series.
  • a fixing connector 200c in which the connection member 221 is not formed may be interposed to serve to fix the electrode tabs 110 in a state where they are not electrically connected.
  • the connector 200 is interposed between the two pairs of electrode tabs 110 of the battery cell 100 facing each other, but the electrode tabs 110 may be coupled between the pair of electrode tabs 110.
  • 1 connecting member 200a having a connecting member 221 is interposed, the electrode tab 110 is bent and coupled to the inside of the connecting connector 200a, the electrode tab 110 between the other pair of electrode tab 110
  • the fixing connector 200c which is not coupled and serves only to close the electrode tab 110 to the outside is interposed therebetween.
  • the fixed connector 200c merely serves to closely contact the electrode tab 110 and the voltage sensing line 300 is not connected.
  • the outermost battery cell 100 is left with only one tab (anode tab or negative electrode tab), which is coupled to only one electrode tab 110 through an end connector 200b-1 or 200b-2. Is connected.
  • the voltage sensing line 300 is connected to one side of the connector 200, and the voltage sensing line 300 is coupled to be connected to the first connection member 221 of the connector 200.
  • the voltage sensing line 300 is connected to the connector 200 to be electrically connected to the electrode tab 110 of the electrode cell 100.
  • Reference numeral 500 denotes a case and 600 denotes an end cover.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The present invention relates to a battery pack. The battery pack of the present invention comprises: a plurality of battery cells in which a pair of electrode tabs having a cathode tab and an anode tab are formed on one side thereof and are arranged side by side to each other; and connectors which are interposed between the electrode tabs of said battery cells adjacent to each other, and in which said electrode tabs are bent and come in contact with the connectors to be electrically connected therewith, and in which elastic pressing portions, which have elasticity by bending and press the electrode tabs, are formed in parts that face the electrode tabs. Thus, when electrode tabs positioned between connectors are bent toward the connectors such that the electrode tabs and the connectors are connected, the electrode tabs can be smoothly bent, and further, the electrode tabs can be bent in such a manner that a wider ground plane with the connectors is obtained whereby a connection operation, such as welding or the like, can be performed easily. Furthermore, since the wide ground plane of the connectors and the electrode tabs can be obtained, the battery pack shows a smooth flow of current.

Description

배터리팩Battery pack
본 발명은 복수 개의 전지셀과 커넥터를 갖는 배터리팩에 관한 것이다. The present invention relates to a battery pack having a plurality of battery cells and a connector.
일반적으로, 이차전지는 일차 전지와는 달리 충전 및 방전이 가능하여 디지털 카메라, 휴대폰, 노트북, 하이브리드 자동차 분야 등 다양한 산업분야에 적용되고 있다. In general, secondary batteries, unlike primary batteries, are capable of charging and discharging, and thus are applied to various industrial fields such as digital cameras, mobile phones, laptops, and hybrid vehicles.
이차 전지로는 니켈-카드뮴 전지, 니켈-메탈 하이드라이드 전지, 니켈-수소 전지, 리튬 이차전지 등이 있다.Secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-hydrogen batteries, and lithium secondary batteries.
전기자동차 또는 하이브리드 자동차의 동력원으로는 리튬 이차전지가 주로 사용되며, 모터구동 등과 같은 큰 전력을 필요로 하므로 다수 개의 고출력 전지셀이나 셀 모듈을 직렬로 연결하여 구성되는 대용량의 배터리팩이 사용되는 것이 일반적이다.A lithium secondary battery is mainly used as a power source of an electric vehicle or a hybrid vehicle, and a large capacity battery pack configured by connecting a plurality of high-output battery cells or cell modules in series is used because it requires a large power such as a motor drive. It is common.
일반적으로 배터리팩은 한국 특허출원 제10-2004-0099303호에서와 같이 직렬로 연결되는 다수 개의 전지셀을 포함하여 이루어진다.In general, the battery pack includes a plurality of battery cells connected in series as in Korean Patent Application No. 10-2004-0099303.
특히, 하이브리트 자동차용 배터리팩의 경우 수 개 내지 수십 개의 전지셀이 충전과 방전을 번갈아가면서 수행하게 됨에 따라 이러한 충방전 등을 제어하여 배터리가 적정한 동작 상태로 유지하도록 관리할 필요성이 있다. Particularly, in the case of a hybrid vehicle battery pack, several to several dozen battery cells are alternately charged and discharged, and thus, there is a need to manage such a charge and discharge to maintain the battery in an appropriate operating state.
또, 배터리팩은 케이스(10)와, 상기 케이스(10) 내부에 위치되며 양극판, 음극판, 세퍼레이터로 구성되어 전기화학적 반응으로 전기에너지를 발생시키는 극판군(20)을 갖는다.In addition, the battery pack has a case 10 and a pole plate group 20 which is located inside the case 10 and is composed of a positive electrode plate, a negative electrode plate, and a separator to generate electrical energy by an electrochemical reaction.
또, 극판군(20)의 양극판에 전기적으로 연결되어 양극단자(30)로 전달하는 양극연결부재(21)와, 상기한 극판군(20)의 음극판과 전기적으로 연결되어 음극단자(40)로 전달하는 음극연결부재를 갖는다.In addition, the positive electrode connecting member 21 which is electrically connected to the positive electrode plate of the electrode plate group 20 and transmitted to the positive electrode terminal 30, and electrically connected to the negative electrode plate of the electrode plate group 20 is connected to the negative electrode terminal 40. It has a cathode connecting member for transmitting.
또, 배터리팩은 그 내부에 다수 개의 전지셀을 포함하고 있으며, 각각의 전지셀이 가지고 있는 전극 탭(통상 '전극 탭' 또는 '셀탭'이라고 함)들은 커넥터와 전기적으로 연결된다.In addition, the battery pack includes a plurality of battery cells therein, and electrode tabs (commonly called 'electrode tabs' or 'cell tabs') of each battery cell are electrically connected to the connector.
전극 탭과 커넥터와의 전기적 연결작업은 커넥터와 커넥터 사이에 위치된 상태가 되면서 커넥터의 외측으로 돌출되어 있는 부분(통상 전극 탭의 상부가 됨)을 커넥터 방향으로 구부린 후 용접을 통해 연결 및 고정한다. The electrical connection work between the electrode tab and the connector is placed between the connector and the connector, and the parts protruding outward of the connector (usually the upper part of the electrode tab) are bent in the direction of the connector and connected and fixed by welding. .
그런데 종래 전극탭과 커넥터를 연결하는 작업을 수행할 때 커넥터를 잡아주는 힘이 약하여 작업성이 좋지 않고, 전극 탭을 커넥터 방향으로 구부릴 때 원활하게 구부러지지 못하여 전극탭과 커넥터의 접지면이 넓게 확보되지 못하는 경우가 빈번하게 발생되는 문제점이 있었다.(전극 탭과 커넥터의 접지면이 작을수록 전류의 원활한 흐름이 이루어지지 못하여 용접도 견고하게 이루어지지 못함)However, when performing the operation of connecting the conventional electrode tab and the connector, the force holding the connector is weak, and workability is not good, and when the electrode tab is bent in the direction of the connector, it is not smoothly bent, thereby securing a wide ground plane between the electrode tab and the connector. There is a problem that often fails to occur. (The smaller the ground plane of the electrode tab and the connector, the less the smooth flow of the current, and thus the welding is not firm.)
본 발명은 전극탭과 커넥터를 연결하는 작업이 용이하고 전극탭을 커넥터 방향으로 구부릴 때 원활하게 구부러져 커텍터와 전극탭의 접지면이 넓게 확보되어 전류의 원활한 흐름이 가능하도록 할 수 있고 견고한 용접이 가능하도록 할 수 있는 배터리팩을 제공하려는데 목적이 있다. The present invention facilitates the operation of connecting the electrode tab and the connector and bends smoothly when the electrode tab is bent in the direction of the connector, so that the ground plane of the connector and the electrode tab can be secured widely to enable a smooth flow of current, and the welding is robust. The purpose is to provide a battery pack that can be made possible.
본 발명에서는 절곡되어 탄성을 갖는 탄성가압부가 커턱터의 외측에 위치되어 커텍터와 커텍터 사이에 위치되는 전극탭의 측면을 가압하여 전극탭을 잡아주도록 함으로써 전극탭과 커넥터를 연결하기 위해 전극탭을 커넥터 방향으로 구부릴 때 원활하게 구부러져 커넥터와 접지면이 넓게 확보되고 용접이 용이하도록 한다.In the present invention, the elastic pressure portion is bent and elastically positioned outside the connector to press the side of the electrode tab located between the connector and the connector to hold the electrode tab to connect the electrode tab and the connector by the electrode tab When bent in the direction of the connector is bent smoothly to ensure a wider connector and ground plane and to facilitate welding.
이러한 본 발명의 배터리팩은, 음극탭과 양극탭으로 이루어지는 한 쌍의 전극탭이 일측에 형성되며 나란히 배열되는 복수 개의 전지셀을 갖는다.The battery pack of the present invention has a plurality of battery cells arranged side by side with a pair of electrode tabs consisting of a negative electrode tab and a positive electrode tab.
또, 서로 이웃하는 전지셀의 전극탭 사이에 개재되며 상기 전극탭들이 구부러진 후 접촉되어 전기적으로 연결되고, 전극탭과 마주하는 부분에는 절곡에 의해 탄성을 가짐으로써 전극탭을 가압하는 탄성가압부가 형성되어 있는 커넥터를 갖는다.In addition, the electrode tabs are interposed between the electrode tabs of neighboring battery cells, and the electrode tabs are bent and electrically connected to each other, and an elastic pressing portion for pressing the electrode tabs by elasticity by bending is formed at a portion facing the electrode tabs. It has a connector.
본 발명의 배터리팩에 구비된 커넥터는, 절곡되어 탄성을 갖는 탄성가압부가 외측에 위치되어 커텍터와 커텍터 사이에 위치되는 전극탭의 측면을 가압하여 전극탭을 잡아주도록 되어 있으므로 전극탭과 커넥터를 연결하기 위해 커넥터와 커넥터 사이에 위치된 전극탭을 커넥터 방향으로 구부릴 때 원활하게 구부릴 수 있고, 전극탭을 구부림에 있어 커넥터와 접지면이 넓게 확보되도록 구부릴 수 있어 용접 등의 연결작업이 용이한 특징이 있다.In the connector provided in the battery pack of the present invention, the elastic pressing portion is bent and elastically positioned outside to press the side of the electrode tab positioned between the connector and the connector to hold the electrode tab and the electrode tab and the connector It can be bent smoothly when the electrode tab located between the connector and the connector to be connected in the direction of the connector to be connected to the connector, and can be bent to secure the connector and the ground plane in the bending of the electrode tab, so that the connection work such as welding is easy. There is a characteristic.
또, 커넥터와 전극탭의 접지면이 넓게 확보되도록 할 수 있으므로 전류의 흐름이 원활한 배터리팩이 되도록 할 수 있는 특징이 있다. In addition, since the ground plane of the connector and the electrode tab can be secured widely, there is a feature that allows the flow of current to be a smooth battery pack.
도 1은 종래의 배터리팩 구조를 설명하기 위한 개략도1 is a schematic diagram illustrating a conventional battery pack structure
도 2는 본 발명의 구성요소인 커넥터의 작용을 설명하기 위한 개략도2 is a schematic view for explaining the operation of the connector which is a component of the present invention;
도 3은 본 발명의 기술적 사상이 적용된 커넥터의 예시도3 is an exemplary view of a connector to which the technical spirit of the present invention is applied.
도 4는 본 발명이 적용된 배터리팩을 설명하기 위한 사시도Figure 4 is a perspective view for explaining a battery pack to which the present invention is applied
도 5는 본 발명이 적용된 배터리팩을 설명하기 위한 분해 사시도5 is an exploded perspective view for explaining a battery pack to which the present invention is applied;
이하, 본 발명의 기술적 사상을 첨부된 도면을 사용하여 더욱 구체적으로 설명한다. Hereinafter, the technical spirit of the present invention will be described in more detail with reference to the accompanying drawings.
그러나 첨부된 도면은 본 발명의 기술적 사상을 더욱 구체적으로 설명하기 위하여 도시한 하나의 예에 불과하므로 본 발명의 기술적 사상이 첨부된 도면의 형태에 한정되는 것은 아니다. However, since the accompanying drawings are only one example illustrated in order to explain the technical idea of the present invention in more detail, the technical idea of the present invention is not limited to the form of the accompanying drawings.
본 발명은 복수 개의 전지셀과 커넥터로 이루어진 2차전지 배터리팩에 관한 것이다. The present invention relates to a secondary battery battery pack consisting of a plurality of battery cells and a connector.
따라서 본 발명의 배터리팩도 종래와 같이 음극탭(112)과 양극탭(111)으로 이루어지는 한 쌍의 전극탭(110)이 일측에 형성되며 나란히 배열되는 복수 개의 전지셀(100)을 갖는다.Therefore, the battery pack of the present invention also has a plurality of battery cells 100 arranged side by side with a pair of electrode tabs 110 formed of a negative electrode tab 112 and a positive electrode tab 111, as in the prior art.
또, 서로 이웃하는 전지셀(100)의 전극탭(110) 사이에 개재되며 상기 전극탭(110)들이 구부러진 후 접촉되어 전기적으로 연결되는 커넥터(200)를 갖는다.In addition, the electrode tabs 110 are interposed between the electrode tabs 110 of neighboring battery cells 100, and the electrode tabs 110 are bent and then contacted and electrically connected to each other.
상기 커넥터(200)의 일측에 연결되는 전압센싱라인(300)이 구비된 형태일 수 있다. The voltage sensing line 300 connected to one side of the connector 200 may be provided.
또, 커넥터(200)에는 커넥터(200)의 연결부재에 일측이 연결되고 상기 전압센싱라인(300)에 타측이 각각 연결되어 전지셀(100)의 전극탭(110)들과 상기 전압센싱라인(300)이 전기적으로 연결되는 퓨즈(400)를 갖는 형태일 수 있다. In addition, one side of the connector 200 is connected to the connection member of the connector 200 and the other side of the voltage sensing line 300 is connected to the electrode tabs 110 of the battery cell 100 and the voltage sensing line ( 300 may have a form in which the fuse 400 is electrically connected.
상기 전지셀(100)은 양극, 음극, 전해질 및 격리판 등으로 이루어져 전기를 발생시키는 부분인 전극체(113)에 그 일측으로 전기가 흐를 수 있도록 전극탭(110)이 형성되는 것일 수 있다.The battery cell 100 may be formed of an electrode tab 110 so that electricity flows to one side of an electrode body 113, which is a part generating electricity by being made of a positive electrode, a negative electrode, an electrolyte, and a separator.
상기 전극탭(110)은 양극탭(111) 및 음극탭(112)으로 이루어지고, 전기적으로 도체인 금속 재질이며, 구부러지기 쉬운 연성 재질인 것이 바람직하다.The electrode tab 110 is made of a positive electrode tab 111 and the negative electrode tab 112, it is preferably a conductive metal material, a flexible material that is easy to bend.
또, 도 5 과 같이 상기와 같은 복수 개의 전지셀(100)들이 일정한 간격을 두고 나란히 배치되며, 서로 이웃하는 상기 전지셀(100)들의 전극탭(110) 사이에 상기 커넥터(200)가 개재되는데 서로 이웃하는 전지셀(100)은 양극탭(111)과 음극탭(112)이 마주보도록 교번 배치되고 그 사이에 상기 커넥터(200)가 개재된다.In addition, as shown in FIG. 5, the plurality of battery cells 100 as described above are arranged side by side at a predetermined interval, and the connector 200 is interposed between the electrode tabs 110 of the battery cells 100 adjacent to each other. The neighboring battery cells 100 are alternately arranged such that the positive electrode tab 111 and the negative electrode tab 112 face each other, and the connector 200 is interposed therebetween.
그런데 본 발명은 전극탭(110)과 커넥터(200)를 연결하는 작업이 용이하고 전극탭(110)을 커넥터(200) 방향으로 구부릴 때 원활하게 구부러져 커텍터(200)와 전극탭(110)의 접지면이 넓게 확보되어 전류의 원활한 흐름이 가능하도록 할 수 있고 견고한 용접이 가능하도록 할 수 있는 커넥터를 구비한 배터리팩을 제공하려는 목적을 갖는다.However, the present invention facilitates the operation of connecting the electrode tab 110 and the connector 200, and smoothly bent when the electrode tab 110 is bent in the direction of the connector 200, so that the connector 200 and the electrode tab 110 are connected to each other. It is an object of the present invention to provide a battery pack having a connector that can ensure a wide ground plane to allow a smooth flow of current and enable a solid welding.
이를 위하여 본 출원의 발명자는, 커넥터(200)가 전극탭(110)을 가압, 고정해줌으로써 전극탭(110)을 커넥터(200) 방향으로 구부릴 때 커넥터(200)와의 접지면이 넓도록 원활하게 구부러지고, 용접 등의 연결작업을 할 때도 움직이지 않아 작업이 용이한 구조를 안출하였다. To this end, the inventor of the present application smoothly so that the ground plane with the connector 200 wide when the connector 200 bends the electrode tab 110 in the direction of the connector 200 by pressing and fixing the electrode tab 110. It is bent and does not move even when the connection work such as welding, so the work is easy to devise a structure.
즉, 커넥터(200) 중 전극탭(110)과 마주하는 부분에는 절곡되어 있는 등의 이유로 탄성을 가짐으로써 전극탭(110)을 가압하는 탄성가압부(250)가 형성되어 있도록 하는 것이며, 이러한 탄성가압부(250)의 가압에 의해 전극탭(110)이 움직이지 않게 고정되는 것이다.That is, the elastic pressing part 250 for pressing the electrode tab 110 is formed in the portion of the connector 200 facing the electrode tab 110 by being elastic, for example, due to bending. The electrode tab 110 is fixed so as not to move by the pressure of the pressing unit 250.
이러한 탄성가압부(250)를 갖는 커넥터(200)의 형상은 배터리팩의 사양에 따라 달라지며, 여러 가지 사양의 커넥터에 적용할 수 있다. The shape of the connector 200 having such an elastic pressing unit 250 depends on the specification of the battery pack, it can be applied to a connector of various specifications.
즉, 도 3과 같이 다양한 형태로 커넥터(200)를 구현할 수 있는 것이다. That is, the connector 200 may be implemented in various forms as shown in FIG. 3.
상기와 같은 탄성가압부(250)는 커넥터(200) 중 전극탭(110)과 마주하는 부분이 절곡된 형태를 갖도록 함으로써 전극탭(110)과 접촉되는 부분이 탄성을 갖도록 할 수 있다. The elastic pressing unit 250 as described above may have a bent portion of the connector 200 facing the electrode tab 110 so that the portion contacting the electrode tab 110 may have elasticity.
또, 커넥터(200)의 외측에 판스프링 형태의 탄성체가 일체화되게 고정되어 있도록 인서트 사출을 하는 방법 등을 통해 상기 탄성체의 일부분이 탄성가압부(250)가 되도록 할 수도 있다.In addition, a part of the elastic body may be the elastic pressing part 250 through a method of insert injection such that the plate spring-type elastic body is fixed to the outside of the connector 200 to be integrally fixed.
전술한 탄성가압부(250)는 도 3과 같이 커넥터(200)의 길이 방향으로 복수 개 형성되어 있는 것이 바람직하다. It is preferable that the aforementioned elastic pressing part 250 is formed in plural in the longitudinal direction of the connector 200 as shown in FIG. 3.
즉, 탄성가압부(250)는 커넥터(200)의 좌, 우측에 형성되어 있되 커넥터의 길이 방향으로 길어 커넥터(200)의 좌, 우측에 각각 1개의 탄성가압부가 형성되는 구조는 탄성가압부의 움직임이 양극탭(111)이나 음극탭(112)에 원활하게 대응하지 못하는 단점이 있으므로 길이가 작은 탄성가압부가 커넥터(200)의 길이 방향으로 여러 개 구비되어 있도록 하는 것이다.(일부 탄성가압부는 양극탭(111)에 대응되고 일부 탄성가압부는 음극탭(112)을 가압하도록 하는 것이다.) That is, the elastic pressing unit 250 is formed on the left and right sides of the connector 200, but is long in the longitudinal direction of the connector, so that one elastic pressing unit is formed on the left and right sides of the connector 200, respectively. Since there is a disadvantage in that it does not correspond smoothly to the positive electrode tab 111 or the negative electrode tab 112, a plurality of small elastic pressing parts are provided in the longitudinal direction of the connector 200. Corresponding to (111), and some of the elastic pressing unit to press the negative electrode tab 112.)
본 발명에서 서로 이웃하는 전지셀(100)의 양극탭(111)과 음극탭(112)은 상기 커넥터(200)의 상면에 구성되는 제1연결부재(221)와 접촉되어 통전되도록 상기 제1연결부재(221) 쪽으로 구부려진 후 레이져 또는 초음파 용접되어 결합되는 것이 바람직하다. In the present invention, the positive electrode tab 111 and the negative electrode tab 112 of neighboring battery cells 100 are in contact with the first connection member 221 formed on the upper surface of the connector 200 so as to be energized. It is preferable to be bent toward the member 221 and then joined by laser or ultrasonic welding.
즉, 전극탭(110)은 커넥터(200) 방향으로 구부러진 후 커넥터(200)와 접촉된 상태에서 용접되어 커넥터(200)와 연결되어 있는 것이 바람직한 것이다. That is, the electrode tab 110 is preferably bent in the direction of the connector 200 and welded in contact with the connector 200 to be connected to the connector 200.
본 발명의 구성요소인 커넥터(200)는 서로 이웃하는 한 쌍의 전지셀(100) 사이에 하나만 개재된다.Only one connector 200, which is a component of the present invention, is interposed between a pair of battery cells 100 adjacent to each other.
즉, 상기 한 쌍의 마주보는 전지셀(100)은 양극탭(111)과 음극탭(112)이 마주보도록 두 쌍의 전극탭(110)이 구성되므로, 한 쌍의 전극탭(110) 사이에는 상기 커넥터(200)가 개재되어 상기 커넥터(200)의 제1연결부재(221)에 결합된다.That is, the pair of battery cells 100 facing each other is composed of two pairs of electrode tabs 110 so that the positive electrode tab 111 and the negative electrode tab 112 face each other. The connector 200 is interposed and coupled to the first connection member 221 of the connector 200.
그리고 나머지 한 쌍의 전극탭(110)은 다시 그 이웃하는 전지셀(100)의 전극탭(110)사이에 개재되는 커넥터(200)의 제1연결부재(221)에 결합된다.The other pair of electrode tabs 110 are coupled to the first connection member 221 of the connector 200 interposed between the electrode tabs 110 of the neighboring battery cell 100.
그리하여 수개의 전지셀(100)들 사이에 커넥터(200)가 지그재그로 개재되고 전극탭(110)들이 직렬로 연결될 수 있다.Thus, the connector 200 may be zigzag interposed between the several battery cells 100 and the electrode tabs 110 may be connected in series.
상기와 같이 전극탭(110)들이 결합되는 경우 상기 복수 개의 전지셀(100)들의 전극탭(110) 사이에는 상기 커넥터(200)가 개재되지 않은 부분이 존재하며, 여기에는 도 4와 같이 제1연결부재(221)가 형성되지 않은 고정커넥터(200c)가 개재되어 상기 전극탭(110)들이 전기적으로 연결되지 않는 상태로 밀착시켜 고정하는 역할을 하도록 구성될 수 있다.When the electrode tabs 110 are coupled as described above, there is a portion between the electrode tabs 110 of the plurality of battery cells 100 without the connector 200 interposed therebetween. A fixing connector 200c in which the connection member 221 is not formed may be interposed to serve to fix the electrode tabs 110 in a state where they are not electrically connected.
즉, 마주보는 전지셀(100)의 두 쌍의 전극탭(110) 사이에 각각 커넥터(200)가 개재되도록 하되 한 쌍의 전극탭(110) 사이에는 전극탭(110)이 결합될 수 있도록 제1연결부재(221)가 형성된 연결커넥터(200a)가 개재되어 전극탭(110)이 연결커넥터(200a) 안쪽으로 구부러져 결합되고, 다른 한 쌍의 전극탭(110) 사이에는 전극탭(110)이 결합되지 않으며 바깥쪽으로 전극탭(110)을 밀착시키는 역할만을 하는 고정커넥터(200c)가 개재된다.That is, the connector 200 is interposed between the two pairs of electrode tabs 110 of the battery cell 100 facing each other, but the electrode tabs 110 may be coupled between the pair of electrode tabs 110. 1 connecting member 200a having a connecting member 221 is interposed, the electrode tab 110 is bent and coupled to the inside of the connecting connector 200a, the electrode tab 110 between the other pair of electrode tab 110 The fixing connector 200c which is not coupled and serves only to close the electrode tab 110 to the outside is interposed therebetween.
이때, 상기 고정커넥터(200c)는 단순히 전극탭(110)을 밀착시키는 역할만을 하게 되며 전압센싱라인(300)이 연결되지 않는다.In this case, the fixed connector 200c merely serves to closely contact the electrode tab 110 and the voltage sensing line 300 is not connected.
그리고 가장 바깥쪽에 배치되는 전지셀(100)은 하나의 탭(양극탭 또는 음극탭)만 남게 되는데, 이는 엔드커넥터(200b-1 또는 200b-2)를 개재하고 하나의 전극탭(110)만 결합하여 연결된다.The outermost battery cell 100 is left with only one tab (anode tab or negative electrode tab), which is coupled to only one electrode tab 110 through an end connector 200b-1 or 200b-2. Is connected.
커넥터(200)의 일측에는 상기 전압센싱라인(300)이 연결되며, 상기 전압센싱라인(300)은 상기 커넥터(200)의 제1연결부재(221)에 연결되도록 결합된다. The voltage sensing line 300 is connected to one side of the connector 200, and the voltage sensing line 300 is coupled to be connected to the first connection member 221 of the connector 200.
즉, 상기 전압센싱라인(300)은 상기 커넥터(200)에 연결되어 상기 전극 셀(100)의 전극탭(110)과 전기적으로 연결되도록 결합된다.That is, the voltage sensing line 300 is connected to the connector 200 to be electrically connected to the electrode tab 110 of the electrode cell 100.
미설명 부호 500은 케이스이고, 600은 엔드커버이다. Reference numeral 500 denotes a case and 600 denotes an end cover.

Claims (3)

  1. 이차전지 배터리팩에 있어서,In a rechargeable battery pack,
    음극탭과 양극탭으로 이루어지는 한 쌍의 전극탭이 일측에 형성되며 나란히 배열되는 복수 개의 전지셀;A plurality of battery cells having a pair of electrode tabs including a negative electrode tab and a positive electrode tab formed on one side thereof and arranged side by side;
    서로 이웃하는 상기 전지셀의 전극탭 사이에 개재되며 상기 전극탭들이 구부러진 후 접촉되어 전기적으로 연결되고, 전극탭과 마주하는 부분에는 전극탭을 가압하는 탄성가압부가 형성되어 있는 커넥터;를 포함하여 구성된, 배터리팩.Interposed between the electrode tabs of the battery cells adjacent to each other, the electrode tabs are bent and contacted and electrically connected to each other, the connector facing the electrode tab is formed with an elastic pressing unit for pressing the electrode tab; , Battery pack.
  2. 제 1항에 있어서,The method of claim 1,
    상기 탄성가압부는 커넥터의 길이 방향으로 복수 개 형성되어 있는 것을 특징으로 하는, 배터리팩.The battery pack, characterized in that the plurality of elastic pressing portion is formed in the longitudinal direction of the connector.
  3. 제 1항에 있어서,The method of claim 1,
    상기 전극탭은 커넥터 방향으로 구부러진 후 커넥터와 접촉된 상태에서 용접되어 커넥터와 연결되어 있는 것을 특징으로 하는, 배터리팩.The electrode tab is bent in the direction of the connector, it characterized in that the battery pack is welded in contact with the connector is connected to the connector.
PCT/KR2012/010286 2011-12-02 2012-11-30 Battery pack WO2013081407A1 (en)

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