WO2017086593A1 - Dispositif d'étanchéité pour batterie secondaire - Google Patents

Dispositif d'étanchéité pour batterie secondaire Download PDF

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Publication number
WO2017086593A1
WO2017086593A1 PCT/KR2016/010936 KR2016010936W WO2017086593A1 WO 2017086593 A1 WO2017086593 A1 WO 2017086593A1 KR 2016010936 W KR2016010936 W KR 2016010936W WO 2017086593 A1 WO2017086593 A1 WO 2017086593A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
electrode lead
heat
heat dissipation
dissipation piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2016/010936
Other languages
English (en)
Korean (ko)
Inventor
김초롱
최용수
김상훈
정상석
황원필
김용
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020160122460A external-priority patent/KR101925090B1/ko
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to EP16866546.1A priority Critical patent/EP3297057B1/fr
Priority to CN201680037933.5A priority patent/CN108292718B/zh
Priority to US15/736,475 priority patent/US10559785B2/en
Priority to JP2018504189A priority patent/JP6618608B2/ja
Priority to PL16866546T priority patent/PL3297057T3/pl
Publication of WO2017086593A1 publication Critical patent/WO2017086593A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • 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
    • 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 a sealing device for a secondary battery, and more particularly, to a sealing device for a secondary battery having improved sealing property on a sealing portion of a battery case in which an electrode lead is located.
  • a secondary battery refers to a battery that can be charged and discharged, unlike a primary battery that cannot be charged.
  • Such a secondary battery is widely used in advanced electronic devices such as phones, notebook computers, and camcorders.
  • the secondary battery includes an electrode assembly including an electrode tab, an electrode lead coupled to the electrode tab of the electrode assembly, a battery case accommodating the electrode assembly with the tip of the electrode lead exposed to the outside, and the battery case. It includes a lead film surrounding the electrode lead provided in the sealing portion.
  • the secondary battery is heat-sealed to seal the sealing portion of the battery case in which the electrode assembly is accommodated, in this case using a sealing device.
  • the secondary battery sealing apparatus has a problem in that the sealing portion is over-sealed while heat source is not discharged to the outside during heat fusion of the sealing portion in which the electrode lead is located, and in particular, the insulation film is damaged while the sealing portion is sealed, resulting in poor insulation. There was a problem that occurred.
  • an object of the present invention is to discharge the heat source generated in the sealing portion through the electrode lead to the outside during heat fusion to the sealing portion of the battery case in which the electrode lead is located
  • the present invention provides a sealing device for a secondary battery which prevents the sealing of the sealing part and poor insulation.
  • the present invention for achieving the above object is a secondary battery sealing device for sealing the sealing portion of the battery case is located in the electrode lead coupled to the electrode assembly, sealing by applying heat and pressure to the sealing portion of the battery case in which the electrode lead is located A thermal fusion member; And a temperature rise preventing member which is supported at the tip of the electrode lead and prevents the temperature rise of the sealing part by cooling the sealing part through the electrode lead.
  • the temperature increase preventing member may cool the sealing part by dissipating heat to the outside through the electrode lead.
  • the temperature increase preventing member may cool the sealing part with cold generated by cooling the electrode lead.
  • the temperature increase preventing member may support the tip of the electrode lead at a lower temperature than the heat sealing member.
  • the temperature increase preventing member may be provided as a first heat dissipation piece and a second heat dissipation piece respectively supporting both side surfaces of the tip of the electrode lead.
  • the first heat dissipation piece may have a lower temperature than the heat seal member, and the second heat dissipation piece may have a lower temperature than the first heat dissipation piece.
  • the first heat dissipation piece may support one end surface of the electrode lead, and after a set time, the second heat dissipation piece may support the other end surface of the electrode lead.
  • the set time may be 1 to 5 seconds.
  • the temperature increase preventing member may cool the sealing part by supporting the tip of the electrode lead for 1 to 5 seconds after the heat sealing member is separated from the sealing part.
  • the heat dissipation member is separated from the sealing portion, and the second heat dissipation piece is separated from the tip of the electrode lead, while the first heat dissipation piece supports the tip of the electrode lead for 1 to 5 seconds. Can be cooled.
  • the present invention has the following effects.
  • the secondary battery sealing apparatus includes a temperature rise preventing member supported on the electrode lead to cool the sealing portion through the electrode lead to prevent the temperature rise of the sealing portion, thereby sealing the sealing portion And insulation failure can be prevented.
  • the temperature increase preventing member according to the present invention can effectively cool the sealing part by dissipating heat to the outside through the electrode lead.
  • the temperature increase preventing member according to the present invention can effectively cool the sealing part with cold generated by cooling the electrode lead.
  • the temperature increase preventing member according to the present invention can be released more effectively the heat generated in the sealing portion by providing a first heat dissipation piece and a second heat dissipation piece having different temperatures.
  • the first heat dissipation piece and the second heat dissipation piece included in the temperature increase preventing member according to the present invention first release the low heat of the initial heat fusion of the sealing portion to the outside while the first heat dissipation piece is supported by the electrode lead, and then the first heat dissipation piece. While the second heat dissipation piece having a lower temperature than the heat dissipation piece is supported by the electrode lead, the high heat of the late heat-sealing portion of the sealing portion can be released to the outside.
  • the temperature increase preventing member according to the present invention can prevent the occurrence of sealing and insulation failure due to the heat remaining in the sealing part by supporting the electrode lead and cooling the sealing part even after the heat sealing of the sealing part.
  • FIG. 1 is a perspective view showing a secondary battery according to an embodiment of the present invention.
  • Figure 2 is a cross-sectional view showing a sealing device for a secondary battery according to an embodiment of the present invention.
  • FIG. 3 to 5 are views showing a state of use of the sealing device for a secondary battery according to an embodiment of the present invention
  • Figure 3 is a view showing the heat-sealing state of the sealing portion of the battery case in which the electrode lead is placed
  • Figure 4 is an electrode 5 is a view illustrating an initial state of heat sealing of a battery case in which a lead is located
  • FIG. 5 is a view illustrating a late state of heat sealing of the battery case in which an electrode lead is located
  • FIG. 6 is a sealing part of a battery case in which an electrode lead is located.
  • the drawing shows the completion state of thermal fusion.
  • FIG. 7 is a cross-sectional view showing a sealing device for a secondary battery according to another embodiment of the present invention.
  • a secondary battery includes an electrode assembly 110 having an electrode tab 111 and an electrode coupled to the electrode tab 111 of the electrode assembly 110.
  • the secondary battery according to an embodiment of the present invention having the configuration as described above seals the sealing unit 121 in a state in which the electrode assembly 110 is accommodated in the battery case 120, and seals the sealing apparatus 200. use.
  • the secondary battery sealing apparatus 200 heats the heat sealing member 210 and the heat generated in the sealing portion 121 to seal the sealing portion 121.
  • Cooling through the electrode lead 130 includes a temperature increase preventing member 220 to prevent the temperature rise of the sealing portion 121.
  • the heat sealing member 210 includes an upper sealing part and a lower sealing part which seal the upper and lower surfaces of the sealing part 121 of the battery case 120 by applying heat and pressure at the same time.
  • the heat sealing member 210 is heat-sealed to seal the sealing portion 121 of the battery case 120 in which the electrode lead 130 is located, at this time the temperature of the sealing portion 121 rises and the sealing portion 121 )
  • Has been a problem of sealing in particular, if the insulating film attached to the inner surface of the sealing portion 121 is damaged, poor insulation may occur.
  • a temperature increase preventing member 220 for cooling the sealing part 121 of the battery case 120 through the electrode lead 130 is provided.
  • the temperature increase preventing member 220 cools the sealing part 121 by dissipating heat from the sealing part 121 to the outside through the electrode lead 130, and thus the temperature of the sealing part 121. Lifting and fruiting can be prevented.
  • the temperature increase preventing member 220 supports the tip of the electrode lead 130 at a temperature lower than the heat generated from the heat sealing member 210. That is, the temperature increase preventing member 220 has a lower temperature than the heat generated in the sealing portion 121 heat-sealed by the heat sealing member 210, and thus heat generated in the sealing portion 121 is the electrode lead 130. Can be released stably.
  • the temperature increase preventing member 220 is provided with a first heat dissipation piece 221 and a second heat dissipation piece 222 so as to support both side surfaces of the tip of the electrode lead 130, respectively. That is, the first heat dissipation piece 221 supports one end surface (right upper surface when viewed in FIG. 2) of the electrode lead 130, and the second heat dissipation piece 222 is the other end surface of the electrode lead 130 ( 2, the lower right side) is supported. Accordingly, the heat of the sealing part 121 positioned on the upper and lower sides of the electrode lead 130 may be uniformly sucked and discharged to the outside, thereby increasing the sealing property of the sealing part 121.
  • first heat dissipation piece 221 and the second heat dissipation piece 222 may have the same temperature, but may have different temperatures. That is, the first heat dissipation piece 221 may have a lower temperature than the heat generated by the heat fusion member 210, and the second heat dissipation piece 222 may have a lower temperature than the first heat dissipation piece 221.
  • both the first heat dissipation piece 221 and the second heat dissipation piece 222 are supported by the electrode lead 130, and thus the sealing part (
  • the high heat generated in the 121 is quickly discharged to the outside through the first heat dissipation piece 221 and the second heat dissipation piece 222 to prevent the sealing.
  • the second heat dissipation piece 222 has a lower temperature than the first heat dissipation piece 221, heat generated in the sealing part 121 may be more quickly discharged to the outside.
  • the temperature increase preventing member 220 is heat-sealed member 210 is heat-sealed the sealing portion 121 and at the same time the first heat dissipation piece 221 is supported on one side of the front end of the electrode lead 130, After the time, the second heat dissipation piece 222 is supported on the other end surface of the electrode lead 130, thereby further improving the sealing property of the sealing part 121.
  • the setting time is 1 to 5 seconds, in particular 3 seconds. That is, the heat fusion member 210 compresses the sealing part 121 in a heated state.
  • the second heat dissipation piece When the 222 supports the electrode lead 130, heat may be released while the sealing part 121 is not sealed, and a sealing failure may occur.
  • the sealing part 121 When the second heat dissipation member 222 supports the electrode lead 130 for more than 5 seconds after the first heat dissipation member 221 supports the electrode lead 130, the sealing part 121 may be oversealed, causing a defect. Can be. Accordingly, after the second heat dissipation piece 222 supports the electrode lead 130, the second heat dissipation piece 222 is supported on the electrode lead 130 within 1 second to 5 seconds, thereby sealing the sealing portion 121. Improvement and fruiting can be prevented.
  • the temperature rise preventing member 220 is heat-sealed by supporting the tip of the electrode lead 130 for 1 to 5 seconds even if the heat sealing is completed and the heat sealing member 210 is separated from the sealing portion 121. That is, even though the heat fusion is completed, heat remains in the sealing part 121, and thus the temperature increase preventing member 220 releases all of the heat remaining in the sealing part 121 to the outside to increase the sealing property.
  • the temperature increase preventing member 220 separates the second heat generating piece 222 from the electrode lead 130 first and the first heat dissipating piece 221 after the set time so that the sealing part 121 can gradually solidify. Separate from 130.
  • the heat fusion member 210 is separated from the sealing portion 121 and at the same time the second heat dissipation piece 222 is separated from the tip of the electrode lead 130, the first heat dissipation piece 221 is further 1 to 5 seconds
  • the sealing portion 121 is gradually solidified while supporting the tip of the electrode lead 130 to prevent excessive release of heat remaining in the sealing portion 121.
  • the secondary battery sealing apparatus according to the present invention having such a configuration can prevent the sealing portion of the battery case provided with the electrode lead from the excessive sealing and insulation failure.
  • the heat sealing member 210 is disposed on the sealing part 121 of the battery case 120 provided with the electrode lead 130.
  • the temperature increase preventing member 220 is disposed at the tip of the electrode lead 130. That is, the temperature increase preventing member 220 is provided with a first heat dissipation piece 221 and a second heat dissipation piece 222 disposed on the top and bottom surfaces of the electrode lead 130, respectively, and the first heat dissipation piece 221.
  • Silver has a temperature lower than the heat generated from the heat sealing member 210
  • the second heat dissipation piece 222 has a lower temperature than the first heat dissipation piece 221.
  • the second heat dissipation piece 222 may be at or below room temperature.
  • the heat sealing member 121 is heat-sealed and sealed by the heat sealing member 210, and at the same time, the first heat dissipation piece 221 of the temperature increase preventing member 220 is The heat generated in the sealing part 121 while being supported on the upper surface of the electrode lead 121 is discharged to the outside through the electrode lead 121 and the first heat dissipation piece 221 to cool the sealing part 121.
  • the second heat dissipation piece 222 is supported on the lower surface of the electrode lead 121. Accordingly, the high temperature heat generated in the sealing part 121 is quickly discharged to the outside through the electrode lead 121 and the second heat dissipation piece 222 to cool the sealing part 121, and thus the sealing part 121 of the sealing part 121 Prevents overseals.
  • the heat sealing member 210 is separated from the sealing part 121, and at the same time, the second heat dissipation piece 222 is the electrode lead ( 130, and thus the first heat dissipation piece 221 radiates heat generated in the sealing part 121 for 1 to 5 seconds. This is because if the heat remaining in the sealing portion 121 is released to the outside all the heat generated in the sealing portion 121 through the first heat dissipation piece 221 because the sealing portion 121 may be solidified quickly and the sealing property may be weakened. Release to the outside.
  • the secondary battery sealing apparatus 200 can prevent the occurrence of the sealing and insulation failure in the sealing portion of the battery case provided with the electrode lead.
  • the temperature increase preventing member 220 ′ of the secondary battery sealing apparatus 200 ′ is a cold air sealing portion generated by cooling the electrode lead 130. It may be a cooling device for cooling the 121, and the cooling device is divided into air cooling and water cooling when divided into large.
  • the temperature increase preventing member 220 ′ which is a cooling device, can directly cool the electrode lead 130 to more effectively cool the temperature of the sealing part 121 located in the electrode lead 130, and in particular, the sealing part 121. Cooling temperature of) can be adjusted more precisely and uniformly.
  • the secondary battery sealing apparatus 200 ′ includes a temperature increase preventing member 220 ′ cooling the sealing unit 121 with cold generated by cooling the electrode lead 130.
  • a temperature increase preventing member 220 ′ cooling the sealing unit 121 with cold generated by cooling the electrode lead 130.

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

Abstract

La présente invention concerne un dispositif d'étanchéité pour une batterie secondaire, qui scelle une partie d'étanchéité d'un boîtier de batterie dans lequel est disposé un fil d'électrode couplé à un ensemble électrode, le dispositif d'étanchéité comprenant : un élément de liaison thermique permettant d'appliquer chaleur et pression à la partie d'étanchéité du boîtier de batterie dans lequel est disposé le fil d'électrode et de la sceller; et un élément de prévention d'élévation de température permettant de supporter l'extrémité avant du fil d'électrode et d'empêcher une élévation de la température dans la partie d'étanchéité par refroidissement de la partie d'étanchéité au moyen du fil d'électrode.
PCT/KR2016/010936 2015-11-18 2016-09-29 Dispositif d'étanchéité pour batterie secondaire Ceased WO2017086593A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP16866546.1A EP3297057B1 (fr) 2015-11-18 2016-09-29 Procédé pour sceller une partie d'étanchéité d`un boitier de batterie
CN201680037933.5A CN108292718B (zh) 2015-11-18 2016-09-29 用于二次电池的密封装置
US15/736,475 US10559785B2 (en) 2015-11-18 2016-09-29 Sealing apparatus for secondary battery
JP2018504189A JP6618608B2 (ja) 2015-11-18 2016-09-29 二次電池用シーリング装置
PL16866546T PL3297057T3 (pl) 2015-11-18 2016-09-29 Sposób uszczelniania części uszczelniającej obudowy baterii

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20150162044 2015-11-18
KR10-2015-0162044 2015-11-18
KR10-2016-0122460 2016-09-23
KR1020160122460A KR101925090B1 (ko) 2015-11-18 2016-09-23 이차전지용 실링장치

Publications (1)

Publication Number Publication Date
WO2017086593A1 true WO2017086593A1 (fr) 2017-05-26

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ID=58719294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2016/010936 Ceased WO2017086593A1 (fr) 2015-11-18 2016-09-29 Dispositif d'étanchéité pour batterie secondaire

Country Status (1)

Country Link
WO (1) WO2017086593A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010110686A (ko) * 2000-01-26 2001-12-13 기타지마 요시토시 히트시일장치, 히트시일방법, 엠보스성형방법,워크압압장치 및 워크
KR20140039350A (ko) * 2012-09-19 2014-04-02 주식회사 엘지화학 냉각 효율이 향상된 전지모듈
KR20140089067A (ko) * 2013-01-03 2014-07-14 삼성에스디아이 주식회사 배터리 팩
KR20140090335A (ko) * 2013-01-07 2014-07-17 에스케이이노베이션 주식회사 자립능력을 갖는 파우치형 이차전지용 방열지지부재 및 이를 갖는 파우치형 이차전지
KR20150045168A (ko) * 2013-10-18 2015-04-28 (주)글로벌텍 배터리용 전극리드와 필름을 융착하는 융착 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010110686A (ko) * 2000-01-26 2001-12-13 기타지마 요시토시 히트시일장치, 히트시일방법, 엠보스성형방법,워크압압장치 및 워크
KR20140039350A (ko) * 2012-09-19 2014-04-02 주식회사 엘지화학 냉각 효율이 향상된 전지모듈
KR20140089067A (ko) * 2013-01-03 2014-07-14 삼성에스디아이 주식회사 배터리 팩
KR20140090335A (ko) * 2013-01-07 2014-07-17 에스케이이노베이션 주식회사 자립능력을 갖는 파우치형 이차전지용 방열지지부재 및 이를 갖는 파우치형 이차전지
KR20150045168A (ko) * 2013-10-18 2015-04-28 (주)글로벌텍 배터리용 전극리드와 필름을 융착하는 융착 장치

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3297057A4 *

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