WO2017142381A1 - Electrode assembly - Google Patents

Electrode assembly Download PDF

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Publication number
WO2017142381A1
WO2017142381A1 PCT/KR2017/001841 KR2017001841W WO2017142381A1 WO 2017142381 A1 WO2017142381 A1 WO 2017142381A1 KR 2017001841 W KR2017001841 W KR 2017001841W WO 2017142381 A1 WO2017142381 A1 WO 2017142381A1
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WO
WIPO (PCT)
Prior art keywords
electrode
tab
unit
assembly
electrode unit
Prior art date
Application number
PCT/KR2017/001841
Other languages
French (fr)
Korean (ko)
Inventor
오정식
김정민
강경원
Original Assignee
주식회사 엘지화학
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
Priority claimed from KR1020170021819A external-priority patent/KR101995288B1/en
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201780002830.XA priority Critical patent/CN107925120B/en
Priority to EP17753542.4A priority patent/EP3322022B1/en
Priority to US15/741,359 priority patent/US10665847B2/en
Publication of WO2017142381A1 publication Critical patent/WO2017142381A1/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
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to an electrode assembly, and more particularly, to an electrode assembly that can significantly increase the design freedom of a secondary battery or a battery pack, and can further increase the shape deformation freedom of a free-form battery.
  • Secondary batteries unlike primary batteries, can be recharged and have been researched and developed in recent years due to the possibility of miniaturization and large capacity. As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing.
  • the secondary battery may be configured by embedding an electrode assembly in a battery case.
  • the electrode assembly mounted inside the battery case is a power generator capable of charging and discharging having a stacked structure of a cathode, a separator, and a cathode.
  • FIG. 1 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab junction is formed in a conventional electrode assembly.
  • FIG. 2 is a perspective view illustrating a state in which an electrode lead is connected to a tab junction in FIG. 1.
  • 3 is a plan view of FIG. 2 viewed from above.
  • FIG. 1 includes a first electrode unit 10 and a second electrode unit 30 having a size smaller than that of the first electrode unit 10 and stacked on the first electrode unit 10.
  • the electrode assembly 1 is shown.
  • the positive electrode tabs of the first electrode unit 10 and the positive electrode tabs of the second electrode unit 30 are connected to each other to form a positive electrode tab junction 51.
  • the negative electrode tabs of the first electrode unit 10 and the negative electrode tabs of the second electrode unit 30 are also connected to each other to form the negative electrode tab junction 53.
  • the positive electrode tab junction 51 and the negative electrode tab junction 53 are formed in this way, the first electrode unit 10 and the second electrode unit 30 can electrically communicate with each other, and thus the first electrode unit 10 A large capacity electrode assembly 1 in which the second electrode unit 30 is combined with each other may be formed.
  • the positive lead 81 and the negative lead 83 may be connected to the electrode assembly 1 to electrically connect the outside of the battery and the inside of the battery electrode assembly 1.
  • the positive lead 81 may be connected to the positive electrode tab junction 51
  • the negative lead 83 may be connected to the negative electrode tab junction 53.
  • the position of the electrode tab to which the electrode leads 81 and 83 may be connected may be determined within the J range shown in FIG. 3.
  • the electrode tab of the first electrode unit 10 is to be directly connected to the electrode tab of the second electrode unit 30.
  • the electrode tab of the first electrode unit 10 is the width of the second electrode unit 30. This is because it must be located in the range J. Therefore, the electrode tab of the first electrode unit 10 and the electrode tab of the second electrode unit 30 are both located within the J range.
  • the position range of the electrode tab to which the electrode lead can be connected in the free-form battery is narrowly limited, which is a problem because it greatly reduces the design freedom of the secondary battery or the battery pack.
  • the present invention has been made to solve the above problems, the problem of the present invention can widen the position range of the electrode tab to which the electrode leads can be connected, thereby significantly increasing the design freedom of the secondary battery or battery pack
  • the present invention provides an electrode assembly capable of further improving the degree of freedom of design of a battery by further increasing the shape deformation degree of a free-form battery.
  • the electrode assembly according to the present invention includes a first electrode unit in which electrodes and separators are alternately stacked, and an electrode and separator are alternately stacked, and has a size smaller than that of the first electrode unit and has a first electrode unit.
  • a tab assembly including a second electrode unit stacked on the electrode tab, wherein the electrode tab included in the first electrode unit and the electrode tab included in the second electrode unit are connected to each other, and are positioned within a width range of the second electrode unit, A portion of the first electrode unit has a leading electrode tab to which the electrode leads are connected.
  • An electrode assembly includes a first electrode unit and a second electrode unit having a size smaller than that of the first electrode unit and stacked on the first electrode unit, and including an electrode tab included in the first electrode unit;
  • the tab assembly in which the electrode tabs included in the second electrode unit are connected to each other is positioned within a width range of the second electrode unit, and a portion of the first electrode unit includes a leading electrode tab to which electrode leads are connected. Accordingly, it is possible to widen the position range of the electrode tab to which the electrode leads can be connected, and as a result, it is possible to significantly increase the design freedom of the secondary battery or the battery pack, and also to further increase the shape deformation freedom of the free-form battery. The degree of freedom in design can be further improved.
  • FIG. 1 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab junction is formed in a conventional electrode assembly.
  • FIG. 2 is a perspective view illustrating a state in which an electrode lead is connected to a tab junction in FIG. 1.
  • FIG. 3 is a plan view from above of the electrode assembly of FIG. 2.
  • FIG. 4 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to Embodiment 1 of the present invention.
  • FIG. 5 is a perspective view illustrating a state in which an electrode lead is connected to a leading electrode tab in the electrode assembly according to the first exemplary embodiment of the present invention.
  • FIG. 6 is a plan view from above of the electrode assembly of FIG. 5.
  • FIG. 7 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a second exemplary embodiment of the present invention.
  • FIG. 8 is a perspective view illustrating a state in which an electrode lead is connected to an electrode tab in an electrode assembly according to a second exemplary embodiment of the present invention.
  • FIG. 9 is a plan view from above of the electrode assembly of FIG. 8.
  • FIG. 10 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a third exemplary embodiment of the present invention.
  • FIG. 11 is a perspective view illustrating a state in which an electrode lead is connected to an electrode tab in an electrode assembly according to a third exemplary embodiment of the present invention.
  • FIG. 12 is a plan view from above of the electrode assembly of FIG. 11.
  • FIG. 13 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a fourth exemplary embodiment of the present invention.
  • FIG. 14 is a perspective view illustrating a state in which an electrode lead is connected to a leading electrode tab in an electrode assembly according to a fourth exemplary embodiment of the present invention, as viewed from a direction opposite to FIG. 13.
  • FIG. 15 is a plan view from above of the electrode assembly of FIG. 14.
  • 16 and 17 are plan views illustrating various shape modification forms of the second electrode unit in the electrode assembly according to the fourth exemplary embodiment of the present invention.
  • FIG. 4 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to Embodiment 1 of the present invention.
  • 5 is a perspective view illustrating a state in which an electrode lead is connected to a leading electrode tab in the electrode assembly according to the first exemplary embodiment of the present invention.
  • 6 is a plan view from above of the electrode assembly of FIG. 5.
  • the electrode assembly 100 includes a first electrode unit 110 and a second electrode unit 130 stacked on the first electrode unit 110. .
  • the first electrode unit 110 may be formed by alternately stacking electrodes and separators.
  • the first electrode unit 110 may be a unit formed by stacking a plurality of first basic unit cells 111, which are units joined by alternately stacking electrodes and separators.
  • the first basic unit cell 111 may be a bonded body in which electrodes and separators are laminated alternately and then laminated.
  • the second electrode unit 130 may be formed in the same manner as the first electrode unit 110.
  • the second electrode unit 130 may be formed by alternately stacking electrodes and separators.
  • the second electrode unit 130 may be formed by stacking a plurality of second basic unit cells 131, which are units joined by alternately stacking electrodes and separators.
  • the second basic unit cell 131 may be a bonded body in which electrodes and separators are laminated alternately and then laminated.
  • the second electrode unit 130 stacked on the first electrode unit 110 may have a smaller size than the first electrode unit 110.
  • the width L of the second electrode unit 130 may have a width narrower than the width K of the first electrode unit 110 (see FIG. 6).
  • the electrode tabs of the electrodes included in the first electrode unit 110 and the electrode tabs of the electrodes included in the second electrode unit 130 are connected to each other to form a tab assembly ( 150).
  • the tab assembly 150 may include a positive electrode tab assembly 151 and a negative electrode tab assembly 153.
  • the positive electrode tab assembly 151 may be formed by connecting the positive electrode tab included in the first electrode unit 110 and the positive electrode tab included in the second electrode unit 130 to each other.
  • the negative electrode tab assembly 153 may be formed by bonding the negative electrode tab included in the first electrode unit 110 and the negative electrode tab included in the second electrode unit 130 to each other.
  • the first electrode unit 110 and the second electrode unit 130 may electrically communicate with each other, and accordingly, the first electrode unit 110 and the second electrode unit 130 may be formed.
  • This combined large capacity electrode assembly 100 can be formed.
  • the tab assembly 150 may be positioned within the width range L of the second electrode unit 130. Because, when the electrode tab of the first electrode unit 110 is to be directly bonded to the electrode tab of the second electrode unit 130, the electrode tab of the first electrode unit 110 of the second electrode unit 130 This is because it must be located within the width range.
  • the leading electrode tab 170 is provided at a portion of the first electrode unit 110.
  • the leading electrode tab 170 may be an electrode tab to which an electrode lead is connected for electrical connection between the battery external device and the battery internal electrode assembly 100 (see FIG. 4).
  • the tab assembly 150 and the leading electrode tab 170 may face the same direction.
  • the leading electrode tab 170 may include a leading positive electrode tab 171 to which the positive lead 181 is connected, and a leading negative electrode tab 173 to which the negative lead 183 is connected (see FIGS. 4 and 5). ).
  • the leading electrode tab 170 may be freely connected to any portion of the first electrode unit 110.
  • the leading electrode tab 170 may be connected to part or all of the first electrode unit 110.
  • the leading electrode tab 170 is formed at a portion of the first electrode unit 110 in which the first electrode unit 110 and the second electrode unit 130 do not overlap. There may be.
  • leading electrode tabs 170 are located at both outer sides of the tab assembly 150. That is, with reference to FIG. 5, the leading positive electrode tab 171 is outside the left side of the positive electrode tab assembly 151, and the leading negative electrode tab 173 is outside the right side of the negative electrode tab assembly 153.
  • the leading electrode tab 170 may be an electrode tab that is not included in the second electrode unit 130 and is included only in the first electrode unit 110.
  • interference may be prevented between the leading electrode tab 170 and the tab assembly 150.
  • the electrode leads 181 and 183 are connected only to the leading electrode tab 170, but the center tab assembly 150 is electrically connected to the entire electrode assembly 100. As such, the electrode leads 181 and 183 may have the same effect as those connected to the entire electrode assembly 100.
  • the electrode assembly 100 has a position range of an electrode tab to which an electrode lead can be connected, up to the width range K of the first electrode assembly 100 unlike the conventional art. It may be extended (see FIG. 6). This is in contrast to the prior art in which the position range of the electrode tabs to which the electrode leads can be connected is limited to the J range (see FIG. 3).
  • the electrode assembly according to the first embodiment of the present invention can widen the position range of the electrode tab to which the electrode leads can be connected, and as a result, can significantly increase the design freedom of the secondary battery or the battery pack.
  • FIG. 7 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a second exemplary embodiment of the present invention.
  • 8 is a perspective view illustrating a state in which an electrode lead is connected to an electrode tab in an electrode assembly according to a second exemplary embodiment of the present invention.
  • 9 is a plan view from above of the electrode assembly of FIG. 8.
  • the electrode assembly according to Embodiment 2 of the present invention has a configuration similar to that of the electrode assembly according to Embodiment 1 described above. However, there is a difference from Example 1 in that the negative lead is connected to the negative electrode tab assembly.
  • the electrode tab of the electrode included in the first electrode unit 210 and the electrode tab of the electrode included in the second electrode unit 230 are The tab junction 250 may be connected to each other.
  • the tab assembly 250 may include a positive electrode tab assembly 251 and a negative electrode tab assembly 253.
  • the positive electrode tab assembly 251 may be formed by connecting the positive electrode tab included in the first electrode unit 210 and the positive electrode tab included in the second electrode unit 230 to each other.
  • the negative electrode tab assembly 253 may be formed by bonding the negative electrode tab included in the first electrode unit 210 and the negative electrode tab included in the second electrode unit 230 to each other.
  • the negative electrode lead 283 may be directly connected to the negative electrode tab junction 253 (see FIG. 8).
  • the negative electrode lead 183 is connected to the leading negative electrode tab 173.
  • the negative electrode lead 283 is connected to the tab assembly 250, particularly the negative electrode tab assembly 253. Therefore, in Example 2, the leading negative electrode tab is unnecessary.
  • the leading electrode tab 270 includes a leading positive electrode tab 271 to which the positive electrode lead 281 is connected.
  • the leading positive electrode tab 271 may be on the left side of the first electrode unit 210 where the first electrode unit 210 and the second electrode unit 230 do not overlap (see FIG. 8).
  • the position of the electrode tab to which the electrode lead can be connected may be formed within N range (see FIG. 9).
  • the position range of the electrode tab to which the electrode lead can be connected can be formed in a new position range, and as a result, the design freedom of the secondary battery or the battery pack is changed to a new form Can be increased with
  • FIG. 10 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a third exemplary embodiment of the present invention.
  • 11 is a perspective view illustrating a state in which an electrode lead is connected to an electrode tab in an electrode assembly according to a third exemplary embodiment of the present invention.
  • 12 is a plan view from above of the electrode assembly of FIG. 11.
  • the electrode assembly according to Embodiment 3 of the present invention has a configuration similar to that of the electrode assembly according to Embodiment 1 described above. However, there is a difference from Example 1 in that the positive lead is connected to the positive electrode tab assembly.
  • the electrode tabs of the electrodes included in the first electrode unit 310 and the electrode tabs of the electrodes included in the second electrode unit 330 are the same as those of the first exemplary embodiment.
  • the tab junction 350 may be connected to each other.
  • the tab assembly 350 may include a positive electrode tab assembly 351 and a negative electrode tab assembly 353.
  • the positive electrode tab assembly 351 may be formed by connecting the positive electrode tab included in the first electrode unit 310 and the positive electrode tab included in the second electrode unit 330 to each other.
  • the negative electrode tab assembly 353 may be formed by bonding the negative electrode tab included in the first electrode unit 310 and the negative electrode tab included in the second electrode unit 330 to each other.
  • the positive electrode lead 381 may be directly connected to the positive electrode tab junction 351 (see FIG. 11).
  • the positive electrode lead 181 is connected to the leading positive electrode tab 171.
  • the positive electrode lead 381 is connected to the tab assembly 350, particularly the positive electrode tab assembly 351.
  • the leading positive electrode tab is not necessary.
  • the leading electrode tab 370 includes a leading negative electrode tab 373 to which the negative electrode lead 383 is connected.
  • the leading negative electrode tab 373 may be on the right side of the first electrode unit 310 in which the first electrode unit 310 and the second electrode unit 330 do not overlap (see FIG. 11).
  • the position of the electrode tab to which the electrode lead can be connected may be formed within the P range (see FIG. 12).
  • the position range of the electrode tab to which the electrode leads can be connected can be formed in a new position range, and as a result, the degree of freedom of design of the secondary battery or the battery pack is changed to a new form. Can be increased with
  • FIG. 13 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a fourth exemplary embodiment of the present invention.
  • FIG. 14 is a perspective view illustrating a state in which an electrode lead is connected to a leading electrode tab in an electrode assembly according to a fourth exemplary embodiment of the present invention, as viewed from a direction opposite to FIG. 13.
  • 15 is a plan view from above of the electrode assembly of FIG. 14.
  • 16 and 17 are plan views illustrating various shape modification forms of the second electrode unit in the electrode assembly according to the fourth exemplary embodiment of the present invention.
  • the electrode assembly according to Embodiment 4 of the present invention has a configuration similar to that of the electrode assembly according to Embodiment 1 described above. However, there is a difference from Example 1 in that the tab assembly and the leading electrode tab face different directions.
  • FIG. 13 is a perspective view of the electrode assembly 1200 viewed in the direction D2 illustrated in FIG. 15.
  • the tab assembly 1250 may include a positive electrode tab assembly 1251 and a negative electrode tab assembly 1253.
  • the positive electrode tab assembly 1251 may be formed by connecting the positive electrode tab included in the first electrode unit 1210 and the positive electrode tab included in the second electrode unit 1230 to each other.
  • the negative electrode tab assembly 1253 may be formed by bonding the negative electrode tab included in the first electrode unit 1210 and the negative electrode tab included in the second electrode unit 1230 to each other.
  • the leading electrode tab 1270 is provided at a portion of the first electrode unit 1210 opposite to the direction in which the tab assembly 1250 faces.
  • the leading electrode tab 1270 may be an electrode tab to which the electrode leads 1281 and 1283 are connected to electrically connect the external device and the internal electrode assembly 1200 (see FIGS. 14 and 15).
  • FIG. 14 illustrates a perspective view of the electrode assembly 1200 in the direction D1 illustrated in FIG. 15.
  • the leading electrode tab 1270 may include a leading positive electrode tab 1271 to which the positive lead 1281 is connected, and a leading negative electrode tab 1273 to which the negative lead 1283 is connected (see FIG. 14).
  • the leading electrode tab 1270 may be freely positioned within the width range K of the first electrode unit 1210 (see FIGS. 14 and 15).
  • the leading electrode tabs 1270 may be electrode tabs included in the first electrode unit 1210 and not included in the second electrode unit 1230 (see FIG. 14).
  • the leading electrode tab 1270 can be freely moved in the K range. This means a significant increase in design freedom.
  • the second electrode unit 1230 had to be closely attached in the F direction so that the interval E became zero.
  • the second electrode unit 1230 is closely attached in the G direction. This may be a phenomenon caused by the tab assembly 1250 and the leading electrode tab 1270 facing in opposite directions.
  • the electrode assembly according to Embodiment 4 of the present invention can widen the position range of the electrode tab to which the electrode leads can be connected, and as a result, can significantly increase the design freedom of the secondary battery or the battery pack, and can also freely. By further increasing the shape deformation degree of the shape battery, the design freedom of the battery can be further improved.

Abstract

The present invention relates to an electrode assembly. More specifically, the present invention relates to an electrode assembly that can significantly increase the degree of freedom in design of a secondary battery or a battery pack, and can further increase the degree of freedom in deformation of a freeform battery. The electrode assembly according to the present invention comprises: a first electrode unit having electrodes and separators alternately stacked one above another; and a second electrode unit having electrodes and separators alternately stacked one above another, the second electrode unit being smaller than the first electrode unit and stacked on the first electrode unit, wherein a tab assembly formed by interconnecting an electrode tab included in the first electrode unit and an electrode tab included in the second electrode unit is located within the width of the second electrode unit, and a leading electrode tab to which an electrode lead is connected is present on a portion of the first electrode unit.

Description

전극 조립체Electrode assembly
관련출원과의 상호인용Citation with Related Applications
본 출원은 2016년 2월 19일자 한국특허출원 제10-2016-0019834호, 2016년 2월 19일자 한국특허출원 제10-2016-0019836호, 및 2017년 2월 17일자 한국특허출원 제10-2017-0021819호에 기초한 우선권의 이익을 주장하며, 해당 한국특허출원의 문헌에 개시된 모든 내용은 본 명세서의 일부로서 포함된다.This application is filed with the Korean Patent Application No. 10-2016-0019834 filed February 19, 2016, the Korean Patent Application No. 10-2016-0019836 filed February 19, 2016, and the Korean Patent Application No. 10- February 17, 2017. Claiming the benefit of priority based on 2017-0021819, all contents disclosed in the documents of the relevant Korean patent application are included as part of this specification.
기술분야Technical Field
본 발명은 전극 조립체에 관한 것으로서, 보다 자세하게는 이차 전지 또는 전지 팩의 설계 자유도를 현저히 증가시킬 수 있고, 또한, 자유 형상 전지의 형상 변형 자유도를 더욱 증가시킬 수 있는 전극 조립체에 관한 것이다. The present invention relates to an electrode assembly, and more particularly, to an electrode assembly that can significantly increase the design freedom of a secondary battery or a battery pack, and can further increase the shape deformation freedom of a free-form battery.
이차 전지는 일차 전지와는 달리 재충전이 가능하고, 또 소형 및 대용량화 가능성으로 인해 근래에 많이 연구 개발되고 있다. 모바일 기기에 대한 기술 개발과 수요가 증가함에 따라 에너지원으로서의 이차 전지의 수요가 급격하게 증가하고 있다.Secondary batteries, unlike primary batteries, can be recharged and have been researched and developed in recent years due to the possibility of miniaturization and large capacity. As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing.
이차 전지는 전지 케이스에 전극 조립체가 내장되어 구성될 수 있다. 전지 케이스의 내부에 장착되는 전극 조립체는 양극/분리막/음극의 적층 구조로 이루어진 충방전이 가능한 발전소자이다. The secondary battery may be configured by embedding an electrode assembly in a battery case. The electrode assembly mounted inside the battery case is a power generator capable of charging and discharging having a stacked structure of a cathode, a separator, and a cathode.
최근에는 다양한 전자 기기들의 등장으로 다양한 형태를 가지는 자유 형상 전지(free form battery)가 널리 사용되고 있는데, 전지의 형상을 자유롭게 하기 위하여 전지 내부에 들어가는 전극 조립체 역시 다양한 형태로 제작될 필요성이 있다. Recently, a free form battery having various forms has been widely used due to the appearance of various electronic devices, and in order to free the shape of the battery, an electrode assembly that enters into the battery also needs to be manufactured in various forms.
도 1은 종래의 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합부가 형성된 상태의 전극 조립체를 도시하는 사시도이다. 도 2는 도 1에서 탭 접합부에 전극 리드가 연결된 상태를 도시하는 사시도이다. 도 3은 도 2를 위에서 바라본 평면도이다.1 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab junction is formed in a conventional electrode assembly. FIG. 2 is a perspective view illustrating a state in which an electrode lead is connected to a tab junction in FIG. 1. 3 is a plan view of FIG. 2 viewed from above.
도 1을 참조하면, 도 1에서는 제1 전극 유닛(10), 및 제1 전극 유닛(10)보다 적은 크기를 가지고 제1 전극 유닛(10)에 적층되는 제2 전극 유닛(30)을 포함하는 전극 조립체(1)가 도시되고 있다. Referring to FIG. 1, FIG. 1 includes a first electrode unit 10 and a second electrode unit 30 having a size smaller than that of the first electrode unit 10 and stacked on the first electrode unit 10. The electrode assembly 1 is shown.
이 전극 조립체(1)에서 제1 전극 유닛(10)의 양극 탭들과 제2 전극 유닛(30)의 양극 탭들은 서로 연결되어 양극 탭 접합부(51)를 형성한다. 그리고 제1 전극 유닛(10)의 음극 탭들과 제2 전극 유닛(30)의 음극 탭들 역시 서로 연결되어 음극 탭 접합부(53)를 형성한다. In this electrode assembly 1, the positive electrode tabs of the first electrode unit 10 and the positive electrode tabs of the second electrode unit 30 are connected to each other to form a positive electrode tab junction 51. In addition, the negative electrode tabs of the first electrode unit 10 and the negative electrode tabs of the second electrode unit 30 are also connected to each other to form the negative electrode tab junction 53.
이렇게 양극 탭 접합부(51)와 음극 탭 접합부(53)를 형성하면, 전기적으로 제1 전극 유닛(10)과 제2 전극 유닛(30)은 서로 통할 수 있으므로, 그에 따라 제1 전극 유닛(10)과 제2 전극 유닛(30)이 합쳐진 큰 용량의 전극 조립체(1)가 형성될 수 있다. When the positive electrode tab junction 51 and the negative electrode tab junction 53 are formed in this way, the first electrode unit 10 and the second electrode unit 30 can electrically communicate with each other, and thus the first electrode unit 10 A large capacity electrode assembly 1 in which the second electrode unit 30 is combined with each other may be formed.
도 2를 참조하면, 전지 외부와 전지 내부 전극 조립체(1)의 전기적 연결을 위하여 양극 리드(81) 및 음극 리드(83)가 전극 조립체(1)에 연결될 수 있다. 양극 리드(81)는 양극 탭 접합부(51)에 연결되며, 음극 리드(83)는 음극 탭 접합부(53)에 연결될 수 있다. Referring to FIG. 2, the positive lead 81 and the negative lead 83 may be connected to the electrode assembly 1 to electrically connect the outside of the battery and the inside of the battery electrode assembly 1. The positive lead 81 may be connected to the positive electrode tab junction 51, and the negative lead 83 may be connected to the negative electrode tab junction 53.
이때, 전극 리드(81, 83)가 연결될 수 있는 전극 탭 위치는 도 3에서 도시되는 J 범위 내에서 정해질 수 밖에 없다. In this case, the position of the electrode tab to which the electrode leads 81 and 83 may be connected may be determined within the J range shown in FIG. 3.
왜냐하면, 제1 전극 유닛(10)의 전극 탭이 제2 전극 유닛(30)의 전극 탭과 직접적으로 연결되려고 하면, 제1 전극 유닛(10)의 전극 탭은 제2 전극 유닛(30)의 폭 범위(J) 내에 위치되어야 하기 때문이다. 따라서 제1 전극 유닛(10)의 전극 탭과 제2 전극 유닛(30)의 전극 탭은 모두 J 범위 내에서 위치할 수 밖에 없다.If the electrode tab of the first electrode unit 10 is to be directly connected to the electrode tab of the second electrode unit 30, the electrode tab of the first electrode unit 10 is the width of the second electrode unit 30. This is because it must be located in the range J. Therefore, the electrode tab of the first electrode unit 10 and the electrode tab of the second electrode unit 30 are both located within the J range.
이처럼 종래에는 자유 형상 전지에서 전극 리드가 연결될 수 있는 전극 탭의 위치 범위는 좁게 제한되었는데, 이는 이차 전지 또는 전지 팩의 설계 자유도를 크게 감소시키므로 문제되었다.As described above, the position range of the electrode tab to which the electrode lead can be connected in the free-form battery is narrowly limited, which is a problem because it greatly reduces the design freedom of the secondary battery or the battery pack.
따라서 본 발명은 위와 같은 문제를 해결하기 위해 안출된 것으로서, 본 발명의 과제는 전극 리드가 연결될 수 있는 전극 탭의 위치 범위를 넓힐 수 있고, 그에 따라 이차 전지 또는 전지 팩의 설계 자유도를 현저히 증가시킬 수 있는 전극 조립체를 제공하는 것이며, 또한, 자유 형상 전지의 형상 변형 자유도를 더욱 증가시킴으로 인해서 전지의 설계 자유도를 한층 더 향상시킬 수 있는 전극 조립체를 제공하는 것이다.Therefore, the present invention has been made to solve the above problems, the problem of the present invention can widen the position range of the electrode tab to which the electrode leads can be connected, thereby significantly increasing the design freedom of the secondary battery or battery pack The present invention provides an electrode assembly capable of further improving the degree of freedom of design of a battery by further increasing the shape deformation degree of a free-form battery.
본 발명에 따른 전극 조립체는 전극 및 분리막이 교대로 적층되어 형성되는 제1 전극 유닛, 및 전극 및 분리막이 교대로 적층되어 형성되고, 제1 전극 유닛의 크기보다 더 작은 크기를 가지고 제1 전극 유닛에 적층되는 제2 전극 유닛을 포함하고, 제1 전극 유닛에 포함된 전극 탭과 제2 전극 유닛에 포함된 전극 탭이 서로 연결되어 형성되는 탭 접합체는 제2 전극 유닛의 폭 범위 내에 위치되며, 제1 전극 유닛의 부분에는 전극 리드가 연결되는 리딩 전극 탭이 있다.The electrode assembly according to the present invention includes a first electrode unit in which electrodes and separators are alternately stacked, and an electrode and separator are alternately stacked, and has a size smaller than that of the first electrode unit and has a first electrode unit. A tab assembly including a second electrode unit stacked on the electrode tab, wherein the electrode tab included in the first electrode unit and the electrode tab included in the second electrode unit are connected to each other, and are positioned within a width range of the second electrode unit, A portion of the first electrode unit has a leading electrode tab to which the electrode leads are connected.
본 발명에 따른 전극 조립체는 제1 전극 유닛, 및 제1 전극 유닛의 크기보다 더 작은 크기를 가지고 제1 전극 유닛에 적층되는 제2 전극 유닛을 포함하고, 제1 전극 유닛에 포함된 전극 탭과 제2 전극 유닛에 포함된 전극 탭이 서로 연결되어 형성되는 탭 접합체는 제2 전극 유닛의 폭 범위 내에 위치되며, 제1 전극 유닛의 부분에는 전극 리드가 연결되는 리딩 전극 탭이 있다. 그에 따라 전극 리드가 연결될 수 있는 전극 탭의 위치 범위를 넓힐 수 있고, 그 결과 이차 전지 또는 전지 팩의 설계 자유도를 현저히 증가시킬 수 있으며, 또한, 자유 형상 전지의 형상 변형 자유도를 더욱 증가시킴으로 인해서 전지의 설계 자유도를 한층 더 향상시킬 수 있다.An electrode assembly according to the present invention includes a first electrode unit and a second electrode unit having a size smaller than that of the first electrode unit and stacked on the first electrode unit, and including an electrode tab included in the first electrode unit; The tab assembly in which the electrode tabs included in the second electrode unit are connected to each other is positioned within a width range of the second electrode unit, and a portion of the first electrode unit includes a leading electrode tab to which electrode leads are connected. Accordingly, it is possible to widen the position range of the electrode tab to which the electrode leads can be connected, and as a result, it is possible to significantly increase the design freedom of the secondary battery or the battery pack, and also to further increase the shape deformation freedom of the free-form battery. The degree of freedom in design can be further improved.
도 1은 종래의 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합부가 형성된 상태의 전극 조립체를 도시하는 사시도이다. 1 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab junction is formed in a conventional electrode assembly.
도 2는 도 1에서 탭 접합부에 전극 리드가 연결된 상태를 도시하는 사시도이다. FIG. 2 is a perspective view illustrating a state in which an electrode lead is connected to a tab junction in FIG. 1.
도 3은 도 2의 전극 조립체를 위에서 바라본 평면도이다.3 is a plan view from above of the electrode assembly of FIG. 2.
도 4는 본 발명의 실시예 1에 따른 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합체가 형성된 상태의 전극 조립체를 도시하는 사시도이다.4 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to Embodiment 1 of the present invention.
도 5는 본 발명의 실시예 1에 따른 전극 조립체에서 리딩 전극 탭에 전극 리드가 연결된 상태를 도시하는 사시도이다.5 is a perspective view illustrating a state in which an electrode lead is connected to a leading electrode tab in the electrode assembly according to the first exemplary embodiment of the present invention.
도 6은 도 5의 전극 조립체를 위에서 바라본 평면도이다.6 is a plan view from above of the electrode assembly of FIG. 5.
도 7은 본 발명의 실시예 2에 따른 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합체가 형성된 상태의 전극 조립체를 도시하는 사시도이다.7 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a second exemplary embodiment of the present invention.
도 8은 본 발명의 실시예 2에 따른 전극 조립체에서 전극 탭에 전극 리드가 연결된 상태를 도시하는 사시도이다.8 is a perspective view illustrating a state in which an electrode lead is connected to an electrode tab in an electrode assembly according to a second exemplary embodiment of the present invention.
도 9는 도 8의 전극 조립체를 위에서 바라본 평면도이다.9 is a plan view from above of the electrode assembly of FIG. 8.
도 10은 본 발명의 실시예 3에 따른 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합체가 형성된 상태의 전극 조립체를 도시하는 사시도이다.10 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a third exemplary embodiment of the present invention.
도 11은 본 발명의 실시예 3에 따른 전극 조립체에서 전극 탭에 전극 리드가 연결된 상태를 도시하는 사시도이다.11 is a perspective view illustrating a state in which an electrode lead is connected to an electrode tab in an electrode assembly according to a third exemplary embodiment of the present invention.
도 12는 도 11의 전극 조립체를 위에서 바라본 평면도이다.12 is a plan view from above of the electrode assembly of FIG. 11.
도 13은 본 발명의 실시예 4에 따른 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합체가 형성된 상태의 전극 조립체를 도시하는 사시도이다.FIG. 13 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a fourth exemplary embodiment of the present invention.
도 14은 본 발명의 실시예 4에 따른 전극 조립체에서 리딩 전극 탭에 전극 리드가 연결된 상태를 도 13과 반대측 방향에서 바라본 모습을 도시하는 사시도이다.FIG. 14 is a perspective view illustrating a state in which an electrode lead is connected to a leading electrode tab in an electrode assembly according to a fourth exemplary embodiment of the present invention, as viewed from a direction opposite to FIG. 13.
도 15는 도 14의 전극 조립체를 위에서 바라본 평면도이다.15 is a plan view from above of the electrode assembly of FIG. 14.
도 16 및 도 17은 본 발명의 실시예 4에 따른 전극 조립체에서 제2 전극 유닛의 다양한 형상 변형 형태를 도시하는 평면도이다.16 and 17 are plan views illustrating various shape modification forms of the second electrode unit in the electrode assembly according to the fourth exemplary embodiment of the present invention.
이하에서는 첨부의 도면을 참조하여 본 발명의 바람직한 실시예를 상세하게 설명한다. 그러나 본 발명이 이하의 실시예에 의해 제한되거나 한정되는 것은 아니다. Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. However, the present invention is not limited or limited by the following examples.
실시예 1Example 1
도 4는 본 발명의 실시예 1에 따른 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합체가 형성된 상태의 전극 조립체를 도시하는 사시도이다. 도 5는 본 발명의 실시예 1에 따른 전극 조립체에서 리딩 전극 탭에 전극 리드가 연결된 상태를 도시하는 사시도이다. 도 6은 도 5의 전극 조립체를 위에서 바라본 평면도이다.4 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to Embodiment 1 of the present invention. 5 is a perspective view illustrating a state in which an electrode lead is connected to a leading electrode tab in the electrode assembly according to the first exemplary embodiment of the present invention. 6 is a plan view from above of the electrode assembly of FIG. 5.
이하에서는 도 4 내지 도 6을 참조하여 본 발명의 실시예 1에 따른 전극 조립체에 대해 설명한다.Hereinafter, an electrode assembly according to Embodiment 1 of the present invention will be described with reference to FIGS. 4 to 6.
도 4를 참조하면, 본 발명의 실시예 1에 따른 전극 조립체(100)는 제1 전극 유닛(110)과 제1 전극 유닛(110)의 상부에 적층되는 제2 전극 유닛(130)을 포함한다. Referring to FIG. 4, the electrode assembly 100 according to the first exemplary embodiment of the present invention includes a first electrode unit 110 and a second electrode unit 130 stacked on the first electrode unit 110. .
제1 전극 유닛(110)은 전극 및 분리막이 교대로 적층되어 형성될 수 있다. 특히 제1 전극 유닛(110)은 전극과 분리막이 교대로 적층되어 접합된 단위체인 제1 기본 단위셀(111)이 복수 개 적층되어 형성된 유닛일 수 있다.The first electrode unit 110 may be formed by alternately stacking electrodes and separators. In particular, the first electrode unit 110 may be a unit formed by stacking a plurality of first basic unit cells 111, which are units joined by alternately stacking electrodes and separators.
즉, 전극과 분리막이 교대로 적층되어 열과 압력에 의하여 접합된 제1 기본 단위셀(111)이 형성된 후에, 이 제1 기본 단위셀(111)이 복수 개 적층되어 제1 전극 유닛(110)이 형성될 수 있다. 이때, 제1 기본 단위셀(111)은 전극과 분리막이 교대로 적층된 후에 라미네이션되어 접합된 접합체일 수 있다. That is, after the electrode and the separator are alternately stacked to form the first basic unit cell 111 bonded by heat and pressure, a plurality of first basic unit cells 111 are stacked to form the first electrode unit 110. Can be formed. In this case, the first basic unit cell 111 may be a bonded body in which electrodes and separators are laminated alternately and then laminated.
제2 전극 유닛(130)은 제1 전극 유닛(110)과 같은 방식으로 형성될 수 있다.The second electrode unit 130 may be formed in the same manner as the first electrode unit 110.
제2 전극 유닛(130)은 전극 및 분리막이 교대로 적층되어 형성될 수 있다. 특히 제2 전극 유닛(130)은 전극과 분리막이 교대로 적층되어 접합된 단위체인 제2 기본 단위셀(131)이 복수 개 적층되어 형성될 수 있다.The second electrode unit 130 may be formed by alternately stacking electrodes and separators. In particular, the second electrode unit 130 may be formed by stacking a plurality of second basic unit cells 131, which are units joined by alternately stacking electrodes and separators.
즉, 전극과 분리막이 교대로 적층되어 열과 압력에 의하여 접합된 제2 기본 단위셀(131)이 형성된 후에, 이 제2 기본 단위셀(131)이 복수 개 적층되어 제2 전극 유닛(130)이 형성될 수 있다. 이때, 제2 기본 단위셀(131)은 전극과 분리막이 교대로 적층된 후에 라미네이션되어 접합된 접합체일 수 있다. That is, after the electrode and the separator are alternately stacked to form the second basic unit cell 131 bonded by heat and pressure, a plurality of second basic unit cells 131 are stacked to form the second electrode unit 130. Can be formed. In this case, the second basic unit cell 131 may be a bonded body in which electrodes and separators are laminated alternately and then laminated.
제1 전극 유닛(110)에 적층되는 제2 전극 유닛(130)은 제1 전극 유닛(110)보다 작은 크기를 가질 수 있다. 특히 제2 전극 유닛(130)의 폭(L)은 제1 전극 유닛(110)의 폭(K)보다 좁은 폭을 가질 수 있다(도 6 참조).The second electrode unit 130 stacked on the first electrode unit 110 may have a smaller size than the first electrode unit 110. In particular, the width L of the second electrode unit 130 may have a width narrower than the width K of the first electrode unit 110 (see FIG. 6).
본 발명의 실시예 1에 따른 전극 조립체(100)에서 제1 전극 유닛(110)에 포함된 전극의 전극 탭과 제2 전극 유닛(130)에 포함된 전극의 전극 탭은 서로 연결되어 탭 접합체(150)를 형성할 수 있다. In the electrode assembly 100 according to the first embodiment of the present invention, the electrode tabs of the electrodes included in the first electrode unit 110 and the electrode tabs of the electrodes included in the second electrode unit 130 are connected to each other to form a tab assembly ( 150).
이러한 탭 접합체(150)는 양극 탭 접합체(151)와 음극 탭 접합체(153)를 포함할 수 있다. 양극 탭 접합체(151)는 제1 전극 유닛(110)에 포함된 양극 탭과 제2 전극 유닛(130)에 포함된 양극 탭이 서로 연결되어 형성될 수 있다. 음극 탭 접합체(153)는 제1 전극 유닛(110)에 포함된 음극 탭과 제2 전극 유닛(130)에 포함된 음극 탭이 서로 접합 연결되어 형성될 수 있다. The tab assembly 150 may include a positive electrode tab assembly 151 and a negative electrode tab assembly 153. The positive electrode tab assembly 151 may be formed by connecting the positive electrode tab included in the first electrode unit 110 and the positive electrode tab included in the second electrode unit 130 to each other. The negative electrode tab assembly 153 may be formed by bonding the negative electrode tab included in the first electrode unit 110 and the negative electrode tab included in the second electrode unit 130 to each other.
이렇게 탭 접합체(150)를 형성하면, 전기적으로 제1 전극 유닛(110)과 제2 전극 유닛(130)은 서로 통할 수 있으므로, 그에 따라 제1 전극 유닛(110)과 제2 전극 유닛(130)이 합쳐진 큰 용량의 전극 조립체(100)가 형성될 수 있다. When the tab assembly 150 is formed in this way, the first electrode unit 110 and the second electrode unit 130 may electrically communicate with each other, and accordingly, the first electrode unit 110 and the second electrode unit 130 may be formed. This combined large capacity electrode assembly 100 can be formed.
다만, 탭 접합체(150)는 제2 전극 유닛(130)의 폭 범위(L) 내에서 위치될 수 있다. 왜냐하면, 제1 전극 유닛(110)의 전극 탭이 제2 전극 유닛(130)의 전극 탭과 직접적으로 접합 연결되려고 하면, 제1 전극 유닛(110)의 전극 탭은 제2 전극 유닛(130)의 폭 범위 내에 위치되어야 하기 때문이다.However, the tab assembly 150 may be positioned within the width range L of the second electrode unit 130. Because, when the electrode tab of the first electrode unit 110 is to be directly bonded to the electrode tab of the second electrode unit 130, the electrode tab of the first electrode unit 110 of the second electrode unit 130 This is because it must be located within the width range.
그리고 본 발명의 실시예 1에 따른 전극 조립체(100)에서는 제1 전극 유닛(110)의 부분에 리딩 전극 탭(170)이 있게 된다. 리딩 전극 탭(170)은, 전지 외부 기기와 전지 내부 전극 조립체(100)의 전기적 연결을 위하여, 전극 리드가 연결되는 전극 탭일 수 있다(도 4 참조). 본 발명의 실시예 1에 따른 전극 조립체(100)에서는 탭 접합체(150)와 리딩 전극 탭(170)이 동일한 방향을 향할 수 있다.In the electrode assembly 100 according to the first exemplary embodiment of the present invention, the leading electrode tab 170 is provided at a portion of the first electrode unit 110. The leading electrode tab 170 may be an electrode tab to which an electrode lead is connected for electrical connection between the battery external device and the battery internal electrode assembly 100 (see FIG. 4). In the electrode assembly 100 according to the first embodiment of the present invention, the tab assembly 150 and the leading electrode tab 170 may face the same direction.
이러한 리딩 전극 탭(170)은 양극 리드(181)가 연결되는 리딩 양극 탭(171), 및 음극 리드(183)가 연결되는 리딩 음극 탭(173)을 포함할 수 있다(도 4 및 도 5 참조). The leading electrode tab 170 may include a leading positive electrode tab 171 to which the positive lead 181 is connected, and a leading negative electrode tab 173 to which the negative lead 183 is connected (see FIGS. 4 and 5). ).
리딩 전극 탭(170)은 제1 전극 유닛(110)의 어느 부분에라도 자유롭게 연결되는 것이 가능하다. 리딩 전극 탭(170)은 제1 전극 유닛(110)의 일부 또는 전부에 연결될 수 있다.The leading electrode tab 170 may be freely connected to any portion of the first electrode unit 110. The leading electrode tab 170 may be connected to part or all of the first electrode unit 110.
다만, 리딩 전극 탭(170)이 연결되는 형태나 상태에 따라 각각의 유리한 장점이 존재하게 된다.However, depending on the shape or state that the leading electrode tab 170 is connected, there are respective advantageous advantages.
본 발명의 실시예 1에 따른 전극 조립체(100)에서는 제1 전극 유닛(110)과 제2 전극 유닛(130)이 겹쳐지지 않는 제1 전극 유닛(110)의 부분에 리딩 전극 탭(170)이 있을 수 있다.In the electrode assembly 100 according to the first exemplary embodiment of the present invention, the leading electrode tab 170 is formed at a portion of the first electrode unit 110 in which the first electrode unit 110 and the second electrode unit 130 do not overlap. There may be.
도 5에서 도시되듯이, 리딩 전극 탭(170)은 탭 접합체(150)의 양측 바깥 쪽에 위치한다. 즉, 도 5를 기준으로 리딩 양극 탭(171)은 양극 탭 접합체(151)의 왼편 외측에 있고, 리딩 음극 탭(173)은 음극 탭 접합체(153)의 오른편 외측에 있다. 그리고 리딩 전극 탭(170)은 제2 전극 유닛(130)에는 속해있지 않고 제1 전극 유닛(110)에만 포함되는 전극 탭일 수 있다. As shown in FIG. 5, the leading electrode tabs 170 are located at both outer sides of the tab assembly 150. That is, with reference to FIG. 5, the leading positive electrode tab 171 is outside the left side of the positive electrode tab assembly 151, and the leading negative electrode tab 173 is outside the right side of the negative electrode tab assembly 153. The leading electrode tab 170 may be an electrode tab that is not included in the second electrode unit 130 and is included only in the first electrode unit 110.
이 경우 리딩 전극 탭(170)과 탭 접합체(150) 사이에 간섭이 방지될 수도 있다.In this case, interference may be prevented between the leading electrode tab 170 and the tab assembly 150.
본 발명의 실시예 1에 따른 전극 조립체(100)에서, 전극 리드(181, 183)는 리딩 전극 탭(170)에만 연결되지만, 가운데 탭 접합체(150)가 전극 조립체(100) 전체에서 전기적으로 연결되어 있으므로, 전극 리드(181, 183)는 전극 조립체(100) 전체에 연결되어 있는 것과 동일한 효과를 얻게 될 수 있다.In the electrode assembly 100 according to Embodiment 1 of the present invention, the electrode leads 181 and 183 are connected only to the leading electrode tab 170, but the center tab assembly 150 is electrically connected to the entire electrode assembly 100. As such, the electrode leads 181 and 183 may have the same effect as those connected to the entire electrode assembly 100.
이상에서 설명한 바와 같이 구성되는 본 발명의 실시예 1에 따른 전극 조립체(100)는 전극 리드가 연결될 수 있는 전극 탭의 위치 범위가 종래와 달리 제1 전극 조립체(100)의 폭 범위(K)까지 확장될 수 있다(도 6 참조). 이는 전극 리드가 연결될 수 있는 전극 탭의 위치 범위가 J 범위로 제한되는 종래기술과는 대조적인 것이다(도 3 참조).As described above, the electrode assembly 100 according to the first exemplary embodiment of the present invention has a position range of an electrode tab to which an electrode lead can be connected, up to the width range K of the first electrode assembly 100 unlike the conventional art. It may be extended (see FIG. 6). This is in contrast to the prior art in which the position range of the electrode tabs to which the electrode leads can be connected is limited to the J range (see FIG. 3).
결론적으로, 본 발명의 실시예 1에 따른 전극 조립체는 전극 리드가 연결될 수 있는 전극 탭의 위치 범위를 넓힐 수 있으며, 그 결과 이차 전지 또는 전지 팩의 설계 자유도를 현저히 증가시킬 수 있다In conclusion, the electrode assembly according to the first embodiment of the present invention can widen the position range of the electrode tab to which the electrode leads can be connected, and as a result, can significantly increase the design freedom of the secondary battery or the battery pack.
실시예 2Example 2
도 7은 본 발명의 실시예 2에 따른 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합체가 형성된 상태의 전극 조립체를 도시하는 사시도이다. 도 8은 본 발명의 실시예 2에 따른 전극 조립체에서 전극 탭에 전극 리드가 연결된 상태를 도시하는 사시도이다. 도 9는 도 8의 전극 조립체를 위에서 바라본 평면도이다.7 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a second exemplary embodiment of the present invention. 8 is a perspective view illustrating a state in which an electrode lead is connected to an electrode tab in an electrode assembly according to a second exemplary embodiment of the present invention. 9 is a plan view from above of the electrode assembly of FIG. 8.
본 발명의 실시예 2에 따른 전극 조립체는 전 술한 실시예 1에 따른 전극 조립체와 유사한 구성을 가진다. 다만, 음극 리드가 음극 탭 접합체에 연결 된다는 점에서 실시예 1과 차이가 있다. The electrode assembly according to Embodiment 2 of the present invention has a configuration similar to that of the electrode assembly according to Embodiment 1 described above. However, there is a difference from Example 1 in that the negative lead is connected to the negative electrode tab assembly.
참고로 전술한 구성과 동일한 (또는 상당한) 부분에 대해서는 동일한 (또는 상당한) 도면 부호를 부여하고, 그에 대한 상세한 설명은 생략하기로 한다.For reference, the same (or substantial) reference numerals will be given to the same (or substantial) parts as those described above, and detailed description thereof will be omitted.
이하에서는 도 7 내지 도 9를 참조하여 본 발명의 실시예 2에 따른 전극 조립체에 대해 설명한다. Hereinafter, an electrode assembly according to Embodiment 2 of the present invention will be described with reference to FIGS. 7 to 9.
본 발명의 실시예 2에 따른 전극 조립체(200)에서도 실시예 1에서와 마찬가지로 제1 전극 유닛(210)에 포함된 전극의 전극 탭과 제2 전극 유닛(230)에 포함된 전극의 전극 탭은 서로 연결되어 탭 접합체(250)를 형성할 수 있다. In the electrode assembly 200 according to the second exemplary embodiment of the present invention, as in the first exemplary embodiment, the electrode tab of the electrode included in the first electrode unit 210 and the electrode tab of the electrode included in the second electrode unit 230 are The tab junction 250 may be connected to each other.
이러한 탭 접합체(250)는 양극 탭 접합체(251)와 음극 탭 접합체(253)를 포함할 수 있다. 양극 탭 접합체(251)는 제1 전극 유닛(210)에 포함된 양극 탭과 제2 전극 유닛(230)에 포함된 양극 탭이 서로 연결되어 형성될 수 있다. 음극 탭 접합체(253)는 제1 전극 유닛(210)에 포함된 음극 탭과 제2 전극 유닛(230)에 포함된 음극 탭이 서로 접합 연결되어 형성될 수 있다. The tab assembly 250 may include a positive electrode tab assembly 251 and a negative electrode tab assembly 253. The positive electrode tab assembly 251 may be formed by connecting the positive electrode tab included in the first electrode unit 210 and the positive electrode tab included in the second electrode unit 230 to each other. The negative electrode tab assembly 253 may be formed by bonding the negative electrode tab included in the first electrode unit 210 and the negative electrode tab included in the second electrode unit 230 to each other.
그런데 본 발명의 실시예 2에 따른 전극 조립체(200)에서는 음극 리드(283)가 음극 탭 접합(253)체에 직접 연결될 수 있다(도 8 참조). 앞서 설명한 실시예 1에서는 음극 리드(183)가 리딩 음극 탭(173)에 연결되었으나, 실시예 2에서는 음극 리드(283)가 탭 접합체(250) 특히 음극 탭 접합체(253)에 연결되는 것이다. 따라서 실시예 2에서는 리딩 음극 탭이 필요 없게 된다. However, in the electrode assembly 200 according to the second exemplary embodiment of the present invention, the negative electrode lead 283 may be directly connected to the negative electrode tab junction 253 (see FIG. 8). In the first embodiment described above, the negative electrode lead 183 is connected to the leading negative electrode tab 173. In the second embodiment, the negative electrode lead 283 is connected to the tab assembly 250, particularly the negative electrode tab assembly 253. Therefore, in Example 2, the leading negative electrode tab is unnecessary.
그리고 본 발명의 실시예 2에 따른 전극 조립체(200)에서 리딩 전극 탭(270)은 양극 리드(281)가 연결되는 리딩 양극 탭(271)을 포함한다. 여기서 리딩 양극 탭(271)은 제1 전극 유닛(210)과 제2 전극 유닛(230)이 겹쳐지지 않는 제1 전극 유닛(210)의 왼쪽 편 부분에 있게 된다(도 8 도면 기준).In the electrode assembly 200 according to the second exemplary embodiment of the present invention, the leading electrode tab 270 includes a leading positive electrode tab 271 to which the positive electrode lead 281 is connected. Here, the leading positive electrode tab 271 may be on the left side of the first electrode unit 210 where the first electrode unit 210 and the second electrode unit 230 do not overlap (see FIG. 8).
상기와 같은 구성을 가질 때, 본 발명의 실시예 2에 따른 전극 조립체(200)에서 전극 리드가 연결될 수 있는 전극 탭의 위치는 N 범위 내에서 형성될 수 있다(도 9 참조). When having the configuration as described above, in the electrode assembly 200 according to the second embodiment of the present invention, the position of the electrode tab to which the electrode lead can be connected may be formed within N range (see FIG. 9).
이처럼 본 발명의 실시예 2에 따른 전극 조립체(200)에서는, 전극 리드가 연결될 수 있는 전극 탭의 위치 범위가 새로운 위치 범위에서 형성될 수 있고, 그 결과 이차 전지 또는 전지 팩의 설계 자유도를 새로운 형태로 증가시킬 수 있다Thus, in the electrode assembly 200 according to the second embodiment of the present invention, the position range of the electrode tab to which the electrode lead can be connected can be formed in a new position range, and as a result, the design freedom of the secondary battery or the battery pack is changed to a new form Can be increased with
실시예 3Example 3
도 10은 본 발명의 실시예 3에 따른 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합체가 형성된 상태의 전극 조립체를 도시하는 사시도이다. 도 11은 본 발명의 실시예 3에 따른 전극 조립체에서 전극 탭에 전극 리드가 연결된 상태를 도시하는 사시도이다. 도 12는 도 11의 전극 조립체를 위에서 바라본 평면도이다.10 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a third exemplary embodiment of the present invention. 11 is a perspective view illustrating a state in which an electrode lead is connected to an electrode tab in an electrode assembly according to a third exemplary embodiment of the present invention. 12 is a plan view from above of the electrode assembly of FIG. 11.
본 발명의 실시예 3에 따른 전극 조립체는 전술한 실시예 1에 따른 전극 조립체와 유사한 구성을 가진다. 다만, 양극 리드가 양극 탭 접합체에 연결 된다는 점에서 실시예 1과 차이가 있다. The electrode assembly according to Embodiment 3 of the present invention has a configuration similar to that of the electrode assembly according to Embodiment 1 described above. However, there is a difference from Example 1 in that the positive lead is connected to the positive electrode tab assembly.
참고로 전술한 구성과 동일한 (또는 상당한) 부분에 대해서는 동일한 (또는 상당한) 도면 부호를 부여하고, 그에 대한 상세한 설명은 생략하기로 한다.For reference, the same (or substantial) reference numerals will be given to the same (or substantial) parts as those described above, and detailed description thereof will be omitted.
이하에서는 도 10 내지 도 12를 참조하여 본 발명의 실시예 3에 따른 전극 조립체에 대해 설명한다. Hereinafter, an electrode assembly according to Embodiment 3 of the present invention will be described with reference to FIGS. 10 to 12.
본 발명의 실시예 3에 따른 전극 조립체(300)에서도 실시예 1에서와 마찬가지로 제1 전극 유닛(310)에 포함된 전극의 전극 탭과 제2 전극 유닛(330)에 포함된 전극의 전극 탭은 서로 연결되어 탭 접합체(350)를 형성할 수 있다. In the electrode assembly 300 according to the third exemplary embodiment, the electrode tabs of the electrodes included in the first electrode unit 310 and the electrode tabs of the electrodes included in the second electrode unit 330 are the same as those of the first exemplary embodiment. The tab junction 350 may be connected to each other.
이러한 탭 접합체(350)는 양극 탭 접합체(351)와 음극 탭 접합체(353)를 포함할 수 있다. 양극 탭 접합체(351)는 제1 전극 유닛(310)에 포함된 양극 탭과 제2 전극 유닛(330)에 포함된 양극 탭이 서로 연결되어 형성될 수 있다. 음극 탭 접합체(353)는 제1 전극 유닛(310)에 포함된 음극 탭과 제2 전극 유닛(330)에 포함된 음극 탭이 서로 접합 연결되어 형성될 수 있다. The tab assembly 350 may include a positive electrode tab assembly 351 and a negative electrode tab assembly 353. The positive electrode tab assembly 351 may be formed by connecting the positive electrode tab included in the first electrode unit 310 and the positive electrode tab included in the second electrode unit 330 to each other. The negative electrode tab assembly 353 may be formed by bonding the negative electrode tab included in the first electrode unit 310 and the negative electrode tab included in the second electrode unit 330 to each other.
그런데 본 발명의 실시예 3에 따른 전극 조립체(300)에서는 양극 리드(381)가 양극 탭 접합(351)체에 직접 연결될 수 있다(도 11 참조). 앞서 설명한 실시예 1에서는 양극 리드(181)가 리딩 양극 탭(171)에 연결되었으나, 실시예 3에서는 양극 리드(381)가 탭 접합체(350) 특히 양극 탭 접합체(351)에 연결되는 것이다. 따라서 실시예 3에서는 리딩 양극 탭이 필요 없게 된다. However, in the electrode assembly 300 according to the third exemplary embodiment of the present invention, the positive electrode lead 381 may be directly connected to the positive electrode tab junction 351 (see FIG. 11). In the first embodiment described above, the positive electrode lead 181 is connected to the leading positive electrode tab 171. In the third embodiment, the positive electrode lead 381 is connected to the tab assembly 350, particularly the positive electrode tab assembly 351. Thus, in Example 3, the leading positive electrode tab is not necessary.
그리고 본 발명의 실시예 3에 따른 전극 조립체(300)에서 리딩 전극 탭(370)은 음극 리드(383)가 연결되는 리딩 음극 탭(373)을 포함한다. 여기서 리딩 음극 탭(373)은 제1 전극 유닛(310)과 제2 전극 유닛(330)이 겹쳐지지 않는 제1 전극 유닛(310)의 오른쪽 편 부분에 있게 된다(도 11 도면 기준).In the electrode assembly 300 according to the third exemplary embodiment, the leading electrode tab 370 includes a leading negative electrode tab 373 to which the negative electrode lead 383 is connected. Here, the leading negative electrode tab 373 may be on the right side of the first electrode unit 310 in which the first electrode unit 310 and the second electrode unit 330 do not overlap (see FIG. 11).
상기와 같은 구성을 가질 때, 본 발명의 실시예 3에 따른 전극 조립체(300)에서 전극 리드가 연결될 수 있는 전극 탭의 위치는 P 범위 내에서 형성될 수 있다(도 12 참조). When having the configuration as described above, in the electrode assembly 300 according to the third embodiment of the present invention, the position of the electrode tab to which the electrode lead can be connected may be formed within the P range (see FIG. 12).
이처럼 본 발명의 실시예 3에 따른 전극 조립체(300)에서는, 전극 리드가 연결될 수 있는 전극 탭의 위치 범위가 새로운 위치 범위에서 형성될 수 있고, 그 결과 이차 전지 또는 전지 팩의 설계 자유도를 새로운 형태로 증가시킬 수 있다Thus, in the electrode assembly 300 according to the third embodiment of the present invention, the position range of the electrode tab to which the electrode leads can be connected can be formed in a new position range, and as a result, the degree of freedom of design of the secondary battery or the battery pack is changed to a new form. Can be increased with
실시예 4Example 4
도 13은 본 발명의 실시예 4에 따른 전극 조립체에서 전극 탭이 서로 접합되어 탭 접합체가 형성된 상태의 전극 조립체를 도시하는 사시도이다. 도 14는 본 발명의 실시예 4에 따른 전극 조립체에서 리딩 전극 탭에 전극 리드가 연결된 상태를 도 13과 반대측 방향에서 바라본 모습을 도시하는 사시도이다. 도 15는 도 14의 전극 조립체를 위에서 바라본 평면도이다. 도 16 및 도 17은 본 발명의 실시예 4에 따른 전극 조립체에서 제2 전극 유닛의 다양한 형상 변형 형태를 도시하는 평면도이다.FIG. 13 is a perspective view illustrating an electrode assembly in which electrode tabs are bonded to each other and a tab assembly is formed in an electrode assembly according to a fourth exemplary embodiment of the present invention. FIG. 14 is a perspective view illustrating a state in which an electrode lead is connected to a leading electrode tab in an electrode assembly according to a fourth exemplary embodiment of the present invention, as viewed from a direction opposite to FIG. 13. 15 is a plan view from above of the electrode assembly of FIG. 14. 16 and 17 are plan views illustrating various shape modification forms of the second electrode unit in the electrode assembly according to the fourth exemplary embodiment of the present invention.
본 발명의 실시예 4에 따른 전극 조립체는 전술한 실시예 1에 따른 전극 조립체와 유사한 구성을 가진다. 다만, 탭 접합체와 리딩 전극 탭이 서로 다른 방향을 향한다는 점에서 실시예 1과 차이가 있다. The electrode assembly according to Embodiment 4 of the present invention has a configuration similar to that of the electrode assembly according to Embodiment 1 described above. However, there is a difference from Example 1 in that the tab assembly and the leading electrode tab face different directions.
참고로 전술한 구성과 동일한 (또는 상당한) 부분에 대해서는 동일한 (또는 상당한) 도면 부호를 부여하고, 그에 대한 상세한 설명은 생략하기로 한다.For reference, the same (or substantial) reference numerals will be given to the same (or substantial) parts as those described above, and detailed description thereof will be omitted.
이하에서는 도 13 내지 도 17을 참조하여 본 발명의 실시예 4에 따른 전극 조립체에 대해 설명한다. Hereinafter, an electrode assembly according to Embodiment 4 of the present invention will be described with reference to FIGS. 13 to 17.
도 13 및 도 15를 참조하면, 본 발명의 실시예 4에 따른 전극 조립체(1200)에서도 실시예 1에서와 마찬가지로 제1 전극 유닛(1210)에 포함된 전극의 전극 탭과 제2 전극 유닛(1230)에 포함된 전극의 전극 탭은 서로 연결되어 탭 접합체(1250)를 형성할 수 있다. 참고로 도 13은 도 15에서 도시되는 D2 방향에서 전극 조립체(1200)를 바라본 사시도의 모습이다.13 and 15, the electrode tab 1200 and the second electrode unit 1230 of the electrode included in the first electrode unit 1210, as in the first embodiment, also in the electrode assembly 1200 according to the fourth embodiment of the present invention. The electrode tabs of the electrodes included in the N may be connected to each other to form the tab assembly 1250. For reference, FIG. 13 is a perspective view of the electrode assembly 1200 viewed in the direction D2 illustrated in FIG. 15.
이러한 탭 접합체(1250)는 양극 탭 접합체(1251)와 음극 탭 접합체(1253)를 포함할 수 있다. 양극 탭 접합체(1251)는 제1 전극 유닛(1210)에 포함된 양극 탭과 제2 전극 유닛(1230)에 포함된 양극 탭이 서로 연결되어 형성될 수 있다. 음극 탭 접합체(1253)는 제1 전극 유닛(1210)에 포함된 음극 탭과 제2 전극 유닛(1230)에 포함된 음극 탭이 서로 접합 연결되어 형성될 수 있다.The tab assembly 1250 may include a positive electrode tab assembly 1251 and a negative electrode tab assembly 1253. The positive electrode tab assembly 1251 may be formed by connecting the positive electrode tab included in the first electrode unit 1210 and the positive electrode tab included in the second electrode unit 1230 to each other. The negative electrode tab assembly 1253 may be formed by bonding the negative electrode tab included in the first electrode unit 1210 and the negative electrode tab included in the second electrode unit 1230 to each other.
그리고 본 발명의 실시예 4에 따른 전극 조립체(1200)에서 탭 접합체(1250)가 향하는 방향의 반대쪽 방향 제1 전극 유닛(1210)의 부분에는 리딩 전극 탭(1270)이 있게 된다. 리딩 전극 탭(1270)은, 전지 외부 기기와 전지 내부 전극 조립체(1200)의 전기적 연결을 위하여, 전극 리드(1281, 1283)가 연결되는 전극 탭일 수 있다(도 14 및 도 15 참조). In the electrode assembly 1200 according to the fourth exemplary embodiment of the present invention, the leading electrode tab 1270 is provided at a portion of the first electrode unit 1210 opposite to the direction in which the tab assembly 1250 faces. The leading electrode tab 1270 may be an electrode tab to which the electrode leads 1281 and 1283 are connected to electrically connect the external device and the internal electrode assembly 1200 (see FIGS. 14 and 15).
본 발명의 실시예 4에 따른 전극 조립체(1200)에서는 탭 접합체(1250)와 리딩 전극 탭(1270)은 특히 180도 서로 다른 방향을 향할 수 있다. 참고로 도 14는 도 15에서 도시되는 D1 방향에서 전극 조립체(1200)를 바라본 사시도의 모습을 도시하고 있다.In the electrode assembly 1200 according to the fourth exemplary embodiment of the present invention, the tab assembly 1250 and the leading electrode tab 1270 may face 180 degrees in different directions. For reference, FIG. 14 illustrates a perspective view of the electrode assembly 1200 in the direction D1 illustrated in FIG. 15.
이러한 리딩 전극 탭(1270)은 양극 리드(1281)가 연결되는 리딩 양극 탭(1271), 및 음극 리드(1283)가 연결되는 리딩 음극 탭(1273)을 포함할 수 있다(도 14 참조).The leading electrode tab 1270 may include a leading positive electrode tab 1271 to which the positive lead 1281 is connected, and a leading negative electrode tab 1273 to which the negative lead 1283 is connected (see FIG. 14).
리딩 전극 탭(1270)은 제1 전극 유닛(1210)의 폭 범위(K) 내에서 자유롭게 위치될 수 있다(도 14 및 도 15 참조). 그리고 리딩 전극 탭(1270)은 제2 전극 유닛(1230)에는 속해있지 않고 제1 전극 유닛(1210)에만 포함되는 전극 탭들일 수 있다(도 14 참조). The leading electrode tab 1270 may be freely positioned within the width range K of the first electrode unit 1210 (see FIGS. 14 and 15). In addition, the leading electrode tabs 1270 may be electrode tabs included in the first electrode unit 1210 and not included in the second electrode unit 1230 (see FIG. 14).
특히, 탭 접합체(1250)와 리딩 전극 탭(1270)이 서로 반대 방향을 향하고 있기 때문에 서로 위치 간섭을 일으킬 가능성이 전혀 없다. 그에 따라 리딩 전극 탭(1270)은 K 범위에서 자유자재로 위치 이동이 가능하다. 이는 설계자유도를 현저히 높이는 것을 의미한다.In particular, since the tab assembly 1250 and the leading electrode tab 1270 face in opposite directions, there is no possibility of causing position interference with each other. Accordingly, the leading electrode tab 1270 can be freely moved in the K range. This means a significant increase in design freedom.
한편, 도 16 및 도 17을 참조하면, 실시예 1에서는 제2 전극 유닛(1230)이, 간격 E가 0이 되도록, F방향으로 바짝 붙어야 했었다. 그러나 실시예 4에서는 제2 전극 유닛(1230)이 G방향으로 바짝 붙게 된다. 이는 탭 접합체(1250)와 리딩 전극 탭(1270)이 서로 반대 방향을 향하고 있기 때문 발생하는 현상일 수 있다.On the other hand, referring to FIG. 16 and FIG. 17, in Example 1, the second electrode unit 1230 had to be closely attached in the F direction so that the interval E became zero. However, in the fourth embodiment, the second electrode unit 1230 is closely attached in the G direction. This may be a phenomenon caused by the tab assembly 1250 and the leading electrode tab 1270 facing in opposite directions.
이렇게 제2 전극 유닛(1230)이 G방향으로 바짝 붙은 상태에서 제2 전극 유닛(1230)을 다양한 형상으로 변경할 경우 이는 자유 형상 전지의 형상 변형 자유도를 더욱 증가시키는 것을 의미한다. 도 16 및 도 17에서는 다양한 형상을 가지는 제2 전극 유닛(1230)의 형태가 도시되고 있다. When the second electrode unit 1230 is changed to various shapes in the state where the second electrode unit 1230 is closely attached in the G direction, this means that the degree of freedom of deformation of the free-form battery is further increased. 16 and 17 illustrate the shape of the second electrode unit 1230 having various shapes.
결론적으로, 본 발명의 실시예 4에 따른 전극 조립체는 전극 리드가 연결될 수 있는 전극 탭의 위치 범위를 넓힐 수 있고, 그 결과 이차 전지 또는 전지 팩의 설계 자유도를 현저히 증가시킬 수 있으며, 또한, 자유 형상 전지의 형상 변형 자유도를 더욱 증가시킴으로 인해서 전지의 설계 자유도를 한층 더 향상시킬 수 있다.In conclusion, the electrode assembly according to Embodiment 4 of the present invention can widen the position range of the electrode tab to which the electrode leads can be connected, and as a result, can significantly increase the design freedom of the secondary battery or the battery pack, and can also freely. By further increasing the shape deformation degree of the shape battery, the design freedom of the battery can be further improved.
이상에서 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 특허청구범위의 균등범위 내에서 다양한 실시가 가능함은 물론이다.Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto, and the technical concept of the present invention and the following will be described by those skilled in the art to which the present invention pertains. Of course, various implementations are possible within the scope of equivalent claims.

Claims (10)

  1. 전극 및 분리막이 교대로 적층되어 형성되는 제1 전극 유닛; 및A first electrode unit formed by alternately stacking electrodes and separators; And
    전극 및 분리막이 교대로 적층되어 형성되고, 상기 제1 전극 유닛의 크기보다 더 작은 크기를 가지고 상기 제1 전극 유닛에 적층되는 제2 전극 유닛을 포함하고,An electrode and a separator are formed to be alternately stacked, and include a second electrode unit having a size smaller than that of the first electrode unit and stacked on the first electrode unit,
    상기 제1 전극 유닛에 포함된 전극 탭과 상기 제2 전극 유닛에 포함된 전극 탭이 서로 연결되어 형성되는 탭 접합체는 상기 제2 전극 유닛의 폭 범위 내에 위치되며,The tab assembly in which the electrode tab included in the first electrode unit and the electrode tab included in the second electrode unit are connected to each other are positioned within a width range of the second electrode unit,
    상기 제1 전극 유닛의 부분에는 전극 리드가 연결되는 리딩 전극 탭이 있는 것을 특징으로 하는 전극 조립체.And a leading electrode tab to which the electrode lead is connected to a portion of the first electrode unit.
  2. 청구항 1에 있어서,The method according to claim 1,
    상기 제1 전극 유닛은 전극과 분리막이 교대로 적층되어 접합된 단위체인 제1 기본 단위 셀이 적층되어 형성되는 것을 특징으로 하는 전극 조립체.The first electrode unit is an electrode assembly, characterized in that the first basic unit cell which is a unit body is laminated and bonded to the electrode and the separator alternately formed.
  3. 청구항 1에 있어서,The method according to claim 1,
    상기 제2 전극 유닛은 전극과 분리막이 교대로 적층되어 접합된 단위체인 제2 기본 단위 셀이 적층되어 형성되는 것을 특징으로 하는 전극 조립체.The second electrode unit is an electrode assembly, characterized in that the electrode is formed by stacking a second basic unit cell, which is a unit body is laminated and bonded alternately.
  4. 청구항 1에 있어서,The method according to claim 1,
    상기 탭 접합체는 The tab assembly is
    상기 제1 전극 유닛에 포함된 양극 탭과 상기 제2 전극 유닛에 포함된 양극 탭이 서로 연결되어 형성되는 양극 탭 접합체; 및A positive electrode tab assembly formed by connecting the positive electrode tab included in the first electrode unit and the positive electrode tab included in the second electrode unit to each other; And
    상기 제1 전극 유닛에 포함된 음극 탭과 상기 제2 전극 유닛에 포함된 음극 탭이 서로 연결되어 형성되는 음극 탭 접합체를 포함하고,A negative electrode tab assembly formed by connecting the negative electrode tab included in the first electrode unit and the negative electrode tab included in the second electrode unit to each other;
    상기 리딩 전극 탭은 The leading electrode tab is
    양극 리드가 연결되는 리딩 양극 탭; 및 A leading positive electrode tab to which a positive electrode lead is connected; And
    음극 리드가 연결되는 리딩 음극 탭을 포함하는 것을 특징으로 하는 전극 조립체. And a leading cathode tab to which the cathode lead is connected.
  5. 청구항 1에 있어서,The method according to claim 1,
    상기 리딩 전극 탭은 상기 제1 전극 유닛과 상기 제2 전극 유닛이 겹쳐지지 않는 제1 전극 유닛의 부분에 있는 것을 특징으로 하는 전극 조립체.And the leading electrode tab is in a portion of the first electrode unit in which the first electrode unit and the second electrode unit do not overlap.
  6. 청구항 5에 있어서,The method according to claim 5,
    상기 탭 접합체는 The tab assembly is
    상기 제1 전극 유닛에 포함된 양극 탭과 상기 제2 전극 유닛에 포함된 양극 탭이 서로 연결되어 형성되는 양극 탭 접합체; 및A positive electrode tab assembly formed by connecting the positive electrode tab included in the first electrode unit and the positive electrode tab included in the second electrode unit to each other; And
    상기 제1 전극 유닛에 포함된 음극 탭과 상기 제2 전극 유닛에 포함된 음극 탭이 서로 연결되어 형성되는 음극 탭 접합체를 포함하고,A negative electrode tab assembly formed by connecting the negative electrode tab included in the first electrode unit and the negative electrode tab included in the second electrode unit to each other;
    상기 리딩 전극 탭은 The leading electrode tab is
    양극 리드가 연결되는 리딩 양극 탭; 및 A leading positive electrode tab to which a positive electrode lead is connected; And
    음극 리드가 연결되는 리딩 음극 탭을 포함하는 것을 특징으로 하는 전극 조립체. And a leading cathode tab to which the cathode lead is connected.
  7. 청구항 5에 있어서,The method according to claim 5,
    상기 탭 접합체는 The tab assembly is
    상기 제1 전극 유닛에 포함된 양극 탭과 상기 제2 전극 유닛에 포함된 양극 탭이 서로 연결되어 형성되는 양극 탭 접합체; 및A positive electrode tab assembly formed by connecting the positive electrode tab included in the first electrode unit and the positive electrode tab included in the second electrode unit to each other; And
    상기 제1 전극 유닛에 포함된 음극 탭과 상기 제2 전극 유닛에 포함된 음극 탭이 서로 연결되어 형성되는 음극 탭 접합체를 포함하고,A negative electrode tab assembly formed by connecting the negative electrode tab included in the first electrode unit and the negative electrode tab included in the second electrode unit to each other;
    음극 리드는 상기 음극 탭 접합체에 연결되며,The negative lead is connected to the negative electrode tab assembly,
    상기 리딩 전극 탭은 The leading electrode tab is
    양극 리드가 연결되는 리딩 양극 탭을 포함하는 것을 특징으로 하는 전극 조립체. And a leading anode tab to which the anode lead is connected.
  8. 청구항 1에 있어서,The method according to claim 1,
    상기 탭 접합체는 The tab assembly is
    상기 제1 전극 유닛에 포함된 양극 탭과 상기 제2 전극 유닛에 포함된 양극 탭이 서로 연결되어 형성되는 양극 탭 접합체; 및A positive electrode tab assembly formed by connecting the positive electrode tab included in the first electrode unit and the positive electrode tab included in the second electrode unit to each other; And
    상기 제1 전극 유닛에 포함된 음극 탭과 상기 제2 전극 유닛에 포함된 음극 탭이 서로 연결되어 형성되는 음극 탭 접합체를 포함하고,A negative electrode tab assembly formed by connecting the negative electrode tab included in the first electrode unit and the negative electrode tab included in the second electrode unit to each other;
    양극 리드는 상기 양극 탭 접합체에 연결되며,A positive lead is connected to the positive electrode tab assembly,
    상기 리딩 전극 탭은 The leading electrode tab is
    음극 리드가 연결되는 리딩 음극 탭을 포함하는 것을 특징으로 하는 전극 조립체.And a leading cathode tab to which the cathode lead is connected.
  9. 청구항 1에 있어서,The method according to claim 1,
    상기 탭 접합체와 상기 리딩 전극 탭은 서로 다른 방향을 향하는 것을 특징으로 하는 전극 조립체.And the tab assembly and the leading electrode tab face different directions.
  10. 청구항 1에 있어서,The method according to claim 1,
    상기 탭 접합체와 상기 리딩 전극 탭은 서로 반대 방향을 향하는 것을 특징으로 하는 전극 조립체.And the tab assembly and the leading electrode tab face in opposite directions to each other.
PCT/KR2017/001841 2016-02-19 2017-02-20 Electrode assembly WO2017142381A1 (en)

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CN201780002830.XA CN107925120B (en) 2016-02-19 2017-02-20 Electrode assembly
EP17753542.4A EP3322022B1 (en) 2016-02-19 2017-02-20 Electrode assembly
US15/741,359 US10665847B2 (en) 2016-02-19 2017-02-20 Electrode assembly

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KR10-2016-0019836 2016-02-19
KR10-2016-0019834 2016-02-19
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KR20160019834 2016-02-19
KR10-2017-0021819 2017-02-17
KR1020170021819A KR101995288B1 (en) 2016-02-19 2017-02-17 Electrode assembly

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KR20130118716A (en) * 2012-04-20 2013-10-30 주식회사 엘지화학 Electrode assembly, battery cell and device comprising the same
KR20130132230A (en) * 2012-05-25 2013-12-04 주식회사 엘지화학 A stepwise electrode assembly, and battery cell, battery pack and device comprising the same
KR20150133165A (en) * 2015-11-12 2015-11-27 주식회사 엘지화학 Battery Cell Having Structure of Steps-Formed
KR20160010080A (en) * 2014-07-18 2016-01-27 주식회사 엘지화학 Electrode Assembly Having Position-Variable Lead Joint And Battery Cell Contaning The Same

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JP2013140707A (en) * 2012-01-04 2013-07-18 Hitachi Ltd Battery module and manufacturing method therefor
KR20130118716A (en) * 2012-04-20 2013-10-30 주식회사 엘지화학 Electrode assembly, battery cell and device comprising the same
KR20130132230A (en) * 2012-05-25 2013-12-04 주식회사 엘지화학 A stepwise electrode assembly, and battery cell, battery pack and device comprising the same
KR20160010080A (en) * 2014-07-18 2016-01-27 주식회사 엘지화학 Electrode Assembly Having Position-Variable Lead Joint And Battery Cell Contaning The Same
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