WO2013005959A2 - Batterie rechargeable - Google Patents

Batterie rechargeable Download PDF

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Publication number
WO2013005959A2
WO2013005959A2 PCT/KR2012/005238 KR2012005238W WO2013005959A2 WO 2013005959 A2 WO2013005959 A2 WO 2013005959A2 KR 2012005238 W KR2012005238 W KR 2012005238W WO 2013005959 A2 WO2013005959 A2 WO 2013005959A2
Authority
WO
WIPO (PCT)
Prior art keywords
battery
pouch
secondary battery
support member
cell
Prior art date
Application number
PCT/KR2012/005238
Other languages
English (en)
Korean (ko)
Other versions
WO2013005959A3 (fr
Inventor
이용준
김영석
김주완
Original Assignee
에스케이이노베이션 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 에스케이이노베이션 주식회사 filed Critical 에스케이이노베이션 주식회사
Publication of WO2013005959A2 publication Critical patent/WO2013005959A2/fr
Publication of WO2013005959A3 publication Critical patent/WO2013005959A3/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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
    • 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

Definitions

  • the present invention relates to a secondary battery, and more particularly, the present invention solves problems such as performance degradation caused by breakdown of insulation resistance by using a support member that protects the sealing end of the pouch, and improves battery performance. It relates to a secondary battery that can be.
  • Batteries can be largely divided into primary and secondary batteries.
  • Primary batteries generate electricity by using an irreversible reaction, so they cannot be reused after being used once.
  • a voltaic battery, and the like and the secondary battery uses a reversible reaction, and thus lead-acid batteries, lithium ion batteries, Ni-Cd batteries, and the like, which are reusable after being charged after use.
  • 1 conceptually illustrates a structure of a general lithium ion battery which is one of secondary batteries.
  • Lithium ion batteries and lithium ion polymer batteries have the same structure except that they differ only in the properties of the electrolyte (liquid / solid).
  • a lithium ion battery includes a cathode 1 generally made of carbon and a cathode 2 generally made of a lithium compound, an electrolyte 3 positioned between two poles 1, 2, and And a wire 4 connecting the cathode 1 and the anode 2.
  • Lithium ions in the electrolyte 3 move toward the cathode 1 when charged and toward the anode 2 when discharged, and cause a chemical reaction by emitting or absorbing excess electrons at each pole. do. In this process, electrons flow through the wire 4, and thus electric energy is generated.
  • the secondary battery generally includes the negative electrode 1, the positive electrode 2, the electrolyte 3, and the electric wire 4 as described above.
  • the secondary battery may be formed with a single negative electrode 1, a positive electrode 2, an electrolyte 3 and an electric wire 4, but more generally, a single negative electrode 1 and a positive electrode ( 2), a plurality of unit cells 10 composed of an electrolyte 3 and an electric wire 4 are connected. That is, a plurality of unit cells 10 as described above are contained in the secondary battery pack. Of course, each unit cell 10 is electrically connected to each other.
  • a secondary battery in general, includes a plurality of unit cells therein, and generally includes a pair of external terminal tabs connected to the electrodes of each cell (that is, one negative electrode to which negative electrodes of each unit cell are connected, A positive electrode is connected to each other, and a pair is provided per cell to serve as an electrode.
  • Such secondary cells are generally connected to a plurality of secondary batteries rather than a single one to form a battery as a pack.
  • each of the cells is called a cell (distinguishable from the unit cells constituting the battery), and the tabs of each cell are electrically connected.
  • a form in which a cell forming a battery forms a pouch form that is, a form consisting of a pouch cell can be exemplified.
  • FIG. 2 illustrates an embodiment of a conventional sub battery module having such a configuration, in which a battery cell 10 is sealed by a pouch 20.
  • the pouch type battery has an advantage of having a smaller volume and mass than a can type battery, whereas a soft pouch is used as a container, which may cause mechanical strength and reliability of sealing.
  • localization of current paths to the outside through microcrack or defect is caused by diffusion of gaseous molecules in the electrolyte into the sealing portion of the sealed pouch during the battery manufacturing process. Destruction may occur.
  • an object of the present invention is to protect the pouch sealing portion by using a support member for protecting the sealing portion end of the pouch, which is caused by the insulation resistance is destroyed It is to provide a secondary battery that can solve problems such as deterioration of performance and improve battery performance.
  • an object of the present invention is to insert the end of the sealing portion is inserted into the insertion groove of the support member, it is formed to surround the secondary can prevent the damage to the pouch, and to reduce the moisture or air penetration from the outside of the secondary battery To provide.
  • an object of the present invention is to provide a secondary battery that can support both sides of the battery cell is formed, the support member is formed higher than the cell height including the tab to protect the side where the tab is formed to improve the overall durability It is.
  • the secondary battery 1000 of the present invention includes at least one secondary battery cell 110, an electrode tab 120 extending in one direction from the battery cell 110, and a battery cell 110 therein in a sheet form.
  • the secondary battery 1000 including the secondary battery 1000 is formed in the height direction of the pouch 130, the insertion groove 310 is formed is inserted into the side end portion of the pouch 130 pouch 130 A pair of supporting members 300 for supporting the are provided.
  • the secondary battery 1000 is formed such that a predetermined region of the pouch 130 surrounds the support member 300 so that the support member 300 is in close contact with the side surface of the battery cell 110.
  • the molding member is inserted into the support member 300 in the insertion groove (310).
  • the secondary battery 1000 has a high height of the support member 300 to the upper and lower sides of the pouch 130.
  • the support member 300 is formed in a circular or polygonal cross section.
  • the support member 300 having a polygonal cross section is formed in a direction perpendicular to the line segment where the insertion groove 310 forms a polygon.
  • the battery module case 200 is provided with a mounting portion of a shape corresponding to the shape of the support member 300.
  • the secondary battery of the present invention can protect the pouch sealing part by using a support member that protects the sealing part end of the pouch, and solves problems such as performance degradation caused by breakdown of insulation resistance, and improves battery performance. There is an advantage to improve.
  • the secondary battery of the present invention is inserted into the insertion groove of the support member, the end of the sealing portion is formed to surround the circumference to prevent damage to the pouch, there is an advantage that can reduce the moisture or air penetration from the outside have.
  • the secondary battery of the present invention has the advantage that the support member is formed can support both sides of the battery cell, formed higher than the cell height including the tab to protect the side on which the tab is formed to improve the overall durability. .
  • FIG. 1 is a structural diagram of a typical lithium ion battery.
  • FIG. 2 is a view showing an example of a conventional sub-battery module.
  • FIG 3 is a view showing a secondary battery according to an embodiment of the present invention.
  • FIG. 4 to 6 are a perspective view, an exploded perspective view and a cross-sectional view showing a sub battery module of the secondary battery shown in FIG.
  • FIG. 7 is a view showing an example of forming a supporting member of a secondary battery according to an embodiment of the present invention.
  • FIG 8 and 9 are another perspective view and an exploded perspective view of a sub battery module according to an embodiment of the present invention.
  • FIG. 10 is another cross-sectional view of a sub battery module according to an embodiment of the present invention.
  • the secondary battery 1000 is formed to include the sub battery module 100 and the battery module case 200. At this time, the sub battery module 100 is a pair of support members 300. Is supported by.
  • the sub battery module 100 includes the battery cell 110, the electrode tab 120, and the pouch 130.
  • the sub battery module 100 may include a form in which one battery cell 110 is provided, and a plurality of sub battery modules 100 may be formed with the separator interposed therebetween.
  • the electrode tab 120 extends in one direction from each battery cell 110.
  • the pouch 130 is sealed in a battery cell 110 is accommodated therein in the form of a sheet.
  • the pouch 130 surrounds the remaining surfaces of the battery cell 110 except for the portion where the electrode tab 120 protrudes, and an aluminum laminate sheet is widely used.
  • the battery module case 200 is a case in which the sub-battery module 100 is embedded, and the sub-battery module 100 is at least two stacked side by side so as to have the same surface on which the electrode tab 120 is located.
  • the battery module case 200 having three configurations is illustrated, but the secondary battery 1000 according to the exemplary embodiment of the present invention may be applied to various battery module case 200 types.
  • Secondary battery 1000 is provided with a support member 300 for supporting portions of both sides of the pouch 130 of the sub-battery module 100.
  • the support member 300 is formed in the height direction of the pouch 130, the insertion groove 310 is formed is inserted into the side end portion of the pouch 130 is a sub-battery module 100 to support the pouch 130 Each pair is provided.
  • 4 to 6 illustrate an example of a secondary battery 1000 according to an exemplary embodiment of the present invention, and show one form of the sub battery module 100 and the support member 300.
  • the support member 300 has a height in which the support member 300 is formed to have the same height as that of the pouch 130 of the sub battery module 100, and both sealed ends of the sub battery module 100 are supported.
  • An example of inserting and fixing the insertion groove 310 of the member 300 is illustrated.
  • the support member 300 is a molding material is inserted into the insertion groove 310 before the insertion of the pouch 130, it is possible to further strengthen the insulating properties of the sub-battery module 100, and with the pouch 130 The fixing of the support member 300 may be facilitated.
  • Secondary battery 1000 is formed so that the support member 300 to support both sides of the pouch 130 can further improve the durability, in particular even in the presence of an external force in the left and right direction sub-battery There is an advantage that the module 100 can be stably protected.
  • the secondary battery 1000 according to the embodiment of the present invention has a structure in which both ends of the pouch 130 are wrapped by the support member 300, and may protect the sealing portion of the pouch 130 and the pouch 130.
  • the sealing part can be protected, and thus, there is an advantage in that problems such as performance degradation caused by breakdown of the insulation resistance can be solved and battery performance can be improved.
  • the support member 300 may be formed to have various shapes according to the shape of the battery cell 110, and the various shapes are illustrated in FIG. 7.
  • FIG. 7 (a) to 7 (c) show an example in which the cross section of the support member 300 is circular, triangular, and rectangular in shape.
  • the support member 300 may be formed so that a predetermined region of the pouch 130 surrounds the support member 300, so that when the cross section of the support member 300 is formed in a polygon, the corner portion may be formed. It is preferably formed in a rounded shape.
  • the support member 300 is preferably formed in the vertical portion to the line segment forming the insertion groove is formed in the corner portion polygon to prevent the fixing angle of the pouch 130 is narrowed.
  • the end portion of the pouch 130 is inserted into the insertion groove 310 and the portion formed to surround the support member 300
  • the angle between is approximately 90 °.
  • the insertion groove 310 is formed at the corner of the support member 300, the end of the pouch 130 is wrapped around the support member 300 and the portion inserted into the insertion groove 310.
  • the angle between the portions to be formed can prevent sheet damage from the conventional example shown in FIG. 2 at approximately 45 °, but damage of the pouch 130 may be caused than from the example shown in FIG.
  • the insertion groove 310 may be formed in a direction perpendicular to the line segment forming the polygon.
  • a seating part having a shape corresponding to that of the sub battery module 100 supported by the support member 300 is formed.
  • the height of the support member 300 may be formed high up and down the pouch 130.
  • the support member 300 illustrated in FIGS. 8 and 9 may be formed so that the insertion groove 310 into which the pouch 130 forming portion of the sub battery module 100 is inserted is not displayed on the upper side and the lower side of the pouch 130.
  • the support member 300 absorbs the impact even in the external force in the vertical direction to protect the battery cell 110.
  • the secondary battery 1000 according to the embodiment of the present invention has an advantage of not only preventing the problem due to insulation breakdown by using the support member 300 but also improving the overall durability.
  • FIG. 10 illustrates another secondary battery 1000 according to an exemplary embodiment of the present invention, and illustrates a suitable example when the sealing portion of the pouch 130 is formed in both sides of the sub battery module 100.
  • a predetermined region of the pouch 130 is formed to surround the support member 300 so that the support member 300 is in close contact with the side surface of the battery cell 110.
  • the support member 300 may be wrapped in whole or in part by the pouch 130.
  • 3 to 9 illustrate an example in which the battery cell 100 is formed in a long hexagonal shape in a left and right direction, and in FIG. 10, an example in which the battery cell 100 is trapezoidal.
  • the secondary battery 1000 according to the exemplary embodiment of the present invention is not limited to a specific shape of the battery cell 100, and may use various support member 300 shapes according to various battery cell 1000 shapes.
  • the secondary battery 1000 uses a support member 300 capable of supporting both side surfaces of the battery cell 100, such as performance degradation caused by breakdown of the insulation resistance. There is an advantage to solve the problem, and improve the battery performance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

La présente invention concerne une batterie rechargeable, et plus précisément une batterie rechargeable capable de résoudre les problèmes de dégradation des performances, etc., causés par une défaillance de la résistance d'isolement, par l'utilisation d'un élément de soutien pour protéger la partie d'extrémité de la partie d'étanchéité d'une poche de façon à pouvoir améliorer les caractéristiques de la batterie.
PCT/KR2012/005238 2011-07-06 2012-07-02 Batterie rechargeable WO2013005959A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2011-0066982 2011-07-06
KR1020110066982A KR20130005528A (ko) 2011-07-06 2011-07-06 절연저항이 향상된 이차전지

Publications (2)

Publication Number Publication Date
WO2013005959A2 true WO2013005959A2 (fr) 2013-01-10
WO2013005959A3 WO2013005959A3 (fr) 2013-02-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2012/005238 WO2013005959A2 (fr) 2011-07-06 2012-07-02 Batterie rechargeable

Country Status (2)

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KR (1) KR20130005528A (fr)
WO (1) WO2013005959A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106159150A (zh) * 2016-08-30 2016-11-23 王春阳 软包电池管理容器

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102246772B1 (ko) 2014-04-23 2021-04-30 삼성에스디아이 주식회사 배터리 팩
KR102210460B1 (ko) * 2014-04-24 2021-02-02 에스케이이노베이션 주식회사 이차전지용 배터리 셀 조립체
US10763467B2 (en) 2015-11-05 2020-09-01 Lg Chem, Ltd. Battery module
US11171375B2 (en) 2016-03-25 2021-11-09 Enevate Corporation Stepped electrochemical cells with folded sealed portion

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090047924A (ko) * 2007-11-09 2009-05-13 주식회사 엘지화학 향상된 열 안정성의 전지셀 및 이를 포함하는 중대형전지모듈
KR20100071844A (ko) * 2008-12-19 2010-06-29 엘에스산전 주식회사 회로차단기의 개폐장치
JP2010218756A (ja) * 2009-03-13 2010-09-30 Hitachi Maxell Ltd 非水電解質電池及び非水電解質電池モジュール

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090047924A (ko) * 2007-11-09 2009-05-13 주식회사 엘지화학 향상된 열 안정성의 전지셀 및 이를 포함하는 중대형전지모듈
KR20100071844A (ko) * 2008-12-19 2010-06-29 엘에스산전 주식회사 회로차단기의 개폐장치
JP2010218756A (ja) * 2009-03-13 2010-09-30 Hitachi Maxell Ltd 非水電解質電池及び非水電解質電池モジュール

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106159150A (zh) * 2016-08-30 2016-11-23 王春阳 软包电池管理容器

Also Published As

Publication number Publication date
KR20130005528A (ko) 2013-01-16
WO2013005959A3 (fr) 2013-02-28

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