WO2018052209A1 - Batterie rechargeable - Google Patents

Batterie rechargeable Download PDF

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Publication number
WO2018052209A1
WO2018052209A1 PCT/KR2017/009662 KR2017009662W WO2018052209A1 WO 2018052209 A1 WO2018052209 A1 WO 2018052209A1 KR 2017009662 W KR2017009662 W KR 2017009662W WO 2018052209 A1 WO2018052209 A1 WO 2018052209A1
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WO
WIPO (PCT)
Prior art keywords
vent
electrode
spark
hole
secondary battery
Prior art date
Application number
PCT/KR2017/009662
Other languages
English (en)
Korean (ko)
Inventor
권민형
Original Assignee
삼성에스디아이 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 삼성에스디아이 주식회사 filed Critical 삼성에스디아이 주식회사
Publication of WO2018052209A1 publication Critical patent/WO2018052209A1/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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/543—Terminals
    • 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
    • H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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 disclosure relates to a secondary battery in which spark is not discharged to the outside of the vent hole.
  • a rechargeable battery is a battery that can be charged and discharged unlike a primary battery that is not rechargeable.
  • Low-capacity secondary batteries are used in portable electronic devices such as mobile phones, notebook computers, and camcorders, and large-capacity batteries are widely used as power sources for driving motors in hybrid vehicles.
  • Representative secondary batteries include nickel cadmium (Ni-Cd) batteries, nickel hydride (Ni-MH) batteries, lithium (Li) batteries, and lithium ion (Li-ion) secondary batteries.
  • the lithium ion secondary battery has an operating voltage about three times higher than that of a nickel cadmium battery or a nickel hydride battery which is widely used as a power source for portable electronic equipment. In addition, it is widely used in view of high energy density per unit weight.
  • the secondary battery mainly uses a lithium oxide as a positive electrode active material and a carbon material as a negative electrode active material.
  • a battery is classified into a liquid electrolyte battery and a polymer electrolyte battery according to the type of electrolyte.
  • a battery using a liquid electrolyte is called a lithium ion battery, and a battery using a polymer electrolyte is called a lithium polymer battery.
  • a vent part is formed in the cap plate, and when the pressure inside the cell rises, the vent part breaks frequently and sparks occur outside the cap plate.
  • One aspect of the present invention is to provide a secondary battery that prevents the spark is released to the outside to improve the durability and the occurrence of safety accidents.
  • a secondary battery includes an electrode assembly including a first electrode and a second electrode, a case in which the electrode assembly is embedded, a cap coupled to an opening of the case and having a first vent formed inside the vent hole.
  • An electrode terminal provided on the plate, the cap plate, the first electrode terminal including the first electrode terminal and the second electrode terminal, the first current collecting tab connecting the electrode assembly to the first electrode terminal, and a second electrode terminal connecting the second electrode terminal.
  • the lead tab may include a second collecting tab, and the bottom surface may be spaced apart from the first vent and the side surface may be spaced apart from the inner wall surface of the vent hole, and the second vent may include a plurality of spark holes.
  • the second vent includes a seating part seated in the vent hole, a side part bent from the seating part, extending into the vent hole and having an inlet space formed therein and a spark hole formed in an inner wall surface of the inlet space, and extending in the side part. And a bottom portion facing away from the first vent.
  • Spark holes may be formed in plurality in a state facing each other at the side facing each other.
  • the spark hole may be formed in plural along the circumference of the side part.
  • the bottom portion may be provided with a guide portion for guiding the spark emitted from the first vent to the spark hole portion.
  • the guide part may be an inclined surface formed to be inclined in the lateral direction from the bottom of the second vent.
  • the guide part may be a guide groove formed in the side direction at the bottom of the second vent.
  • a plurality of guide grooves may be formed radially with respect to the center of the bottom portion.
  • the spark generated in the first vent due to the increase in the internal pressure passes through the second vent and the sparks cancel each other's contact with each other, thereby effectively preventing sparks from occurring outside of the secondary battery. Can be.
  • FIG. 1 is a perspective view schematically illustrating a rechargeable battery according to a first exemplary embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along line II-II of the rechargeable battery of FIG. 1.
  • FIG. 3 is a perspective view schematically illustrating an essential part of a state in which a second vent is installed in a vent hole of the rechargeable battery of FIG. 1.
  • FIG. 4 is a cross-sectional perspective view illustrating main parts schematically illustrating a state in which the first vent and the second vent are cut along the line IV-IV of the rechargeable battery of FIG. 3.
  • FIG. 5 is a cross-sectional view illustrating main parts of a state in which the first vent and the second vent are cut along the line VV of the rechargeable battery of FIG. 3.
  • FIG. 6 is a cross-sectional view illustrating main parts of a state in which a first vent and a second vent are installed according to a second exemplary embodiment of the present invention.
  • FIG. 7 is a bottom perspective view schematically illustrating a main part in which a second vent according to a third exemplary embodiment of the present invention is installed.
  • FIG. 1 is a perspective view schematically illustrating a rechargeable battery according to a first exemplary embodiment of the present invention
  • FIG. 2 is a cross-sectional view taken along line II-II of the rechargeable battery of FIG. 1.
  • the secondary battery 100 includes an electrode assembly 10 having a first electrode 11 and a second electrode 12, and A case 15 having the electrode assembly 10 therein; a cap plate 20 coupled to the opening of the case 15 and having a first vent 41 formed inside the vent hole 10a; and a cap plate 20 And a first current collector for connecting the electrode assembly 10 to the first electrode terminal 21 and the electrode terminals 21 and 22 installed at the first electrode terminal 21 and the second electrode terminal 22.
  • Lead tabs 51 and 52 including a second current collecting tab 52 connecting the tab 51 and the electrode assembly 10 to the second electrode terminal 22.
  • the electrode assembly 10 has a first electrode (hereinafter referred to as "cathode”) 11 and a second electrode (hereinafter referred to as “anode”) 12 disposed on both sides of the separator 13 as an insulator,
  • the negative electrode 11, the separator 13, and the positive electrode 12 may be formed by drawing a jelly roll.
  • the negative electrode 11 and the positive electrode 12 each include the coating portions 11a and 12a in which the active material is applied to the current collector of the metal plate, and the plain portions 11b and 12b formed of the current collector exposed without applying the active material. Include.
  • the uncoated portion 11b of the negative electrode 11 is formed at one end of the negative electrode 11 along the negative electrode 11 to be wound.
  • the uncoated portion 12b of the anode 12 is formed at one end of the anode 12 along the anode 12 to be wound. Therefore, the uncoated portions 11b and 12b are disposed at both ends of the electrode assembly 10, respectively.
  • the case 15 is formed of a substantially rectangular parallelepiped to set a space for accommodating the electrode assembly 10 and the electrolyte therein, and forms an opening connecting the external and internal spaces on one surface of the rectangular parallelepiped. The opening allows insertion of the electrode assembly 10 into the case 15.
  • the cap plate 20 is installed in the opening of the case 15 to seal the case 15.
  • the case 15 and the cap plate 20 may be made of aluminum and welded to each other.
  • the cap plate 20 includes an electrolyte injection hole 29, a vent hole 20a, and a terminal hole.
  • the electrolyte injection hole 29 couples the cap plate 20 to the case 15, and then injects the electrolyte into the case 15. After the electrolyte injection, the electrolyte injection opening 29 is sealed with a sealing stopper 27.
  • the first vent 41 is formed in the vent hole 20a to discharge the internal pressure of the secondary battery 100.
  • the electrode terminals 21 and 22 are configured of the first electrode terminal 21 and the second electrode terminal 22, and are installed in the cap plate 20 and electrically connected to the electrode assembly 10.
  • the first electrode terminal 21 is a negative electrode terminal
  • the second electrode terminal 22 is composed of a positive electrode terminal.
  • the negative electrode terminal 21 is electrically connected to the negative electrode 11 of the electrode assembly 10, and the positive electrode terminal 22 is electrically connected to the cap plate 20 by welding or the like, so that the second current collecting tab 52 is connected to the positive electrode. Is connected via).
  • the negative electrode terminal 21 may pass through the terminal hole, and one end may be connected to the first current collecting tab 51, and the other end may protrude out of the cap plate 20.
  • the positive terminal 22 may pass through the terminal hole, and one end may be connected to the second current collecting tab 52, and the other end may protrude to the outside of the cap plate 20.
  • FIG. 3 is a perspective view schematically illustrating a state in which a second vent is installed in a vent hole of the secondary battery of FIG. 1, and FIG. 4 is a view of the first vent and the second cut along the line IV-IV of the secondary battery of FIG. 3.
  • FIG. 5 is a cross-sectional perspective view illustrating main parts in a vent state, and FIG. 5 is a cross-sectional view of main parts in a state in which the first vent and the second vent of the secondary battery of FIG. 3 are cut out.
  • the vent hole 10a is provided with a second vent 40 above the first vent 41.
  • the second vent 40 allows the spark 41a generated from the first vent 41 to be discharged while forming a curved path, so that the spark does not diverge to the outside of the cap plate 20.
  • the second vent 40 extends into the vent hole 10a in a state bent from the seating portion 42 and the seating portion 42 seated in the vent hole 10a, and the spark hole 44a is formed.
  • the formed side portion 44 may include a bottom portion 46 extending to the side portion 44 and facing away from the first vent 41.
  • the seating part 42 is installed in a state of being seated at an opened position of the vent hole 10a and may be fixed to the cap plate 20 of the portion where the vent hole 10a is formed.
  • the mounting portion 42 may be fixed in a state of being seated on the stepped portion formed in the open edge portion of the vent hole 10a.
  • the seating portion 42 may have a side portion 44 extending in the inner direction of the vent hole 10a.
  • the side portion 44 is connected to the seating portion 42 and the other side extends in the inner direction of the vent hole 10a.
  • the side portion 44 may extend in the direction of the first vent 41 while being spaced apart from the inner wall surface of the vent hole 10a.
  • the side 44 is spaced apart from the inner wall surface of the vent hole 10a so that the spark 41a generated in the first vent 41 is a portion between the side portion 44 and the inner wall surface of the vent hole 10a. It is intended to be introduced into.
  • the side part 44 is formed with a plurality of spark holes 44a through which the sparks 41a generated by breaking of the first vent 41 are discharged.
  • the inlet space is formed in the side portion 44, and the spark hole 44a may be formed to penetrate the inner wall surface of the inlet space.
  • the spark hole 44a is formed in the side portion 44 so that the spark 41a generated in the first vent 41 is canceled while passing through the spark hole 44a to the outside of the cap plate 20. This is to prevent the spark 41a from being discharged. This will be described in detail below.
  • the spark holes 44a may be formed on both sides of the side wall 44 facing each other on the inner wall surface of the inlet space.
  • the spark hole 44a may be formed by forming a plurality of rows and columns on opposite sides of the side portion 44. Although the spark hole 44a is exemplarily described as being opened in a cylindrical shape, the spark hole 44a is not necessarily limited thereto and may be opened in a polygonal shape.
  • the spark hole 44a penetrates the inner wall surface of the inlet space so that the spark generated in the first vent 41 passes through the opposing spark hole 44a, respectively, in the inside of the inlet space. It is possible to offset by contact. Accordingly, the spark can be effectively attenuated or extinguished inside the inlet space without being discharged to the outside of the second vent 40.
  • spark hole 44a is exemplarily described to be formed on each side facing each other in the present embodiment, the present invention is not necessarily limited thereto and may be formed along the circumference of the side of the second vent 40.
  • the bottom portion 46 may be positioned inside the vent hole 10a while being spaced apart from the first vent 41. Therefore, the spark emitted from the first vent 41 may move to the space between the side portion 44 and the inner wall surface of the vent hole 10a in the state of first contact with the bottom portion 46.
  • bottom portion 46 is exemplarily described as being formed as a flat surface in this embodiment, it is not necessarily limited thereto, and a part or the whole of the surface is induced to induce the movement of the spark generated from the first vent 41. It is also possible to deform to a certain shape.
  • the spark discharged from the first vent 41 is moved while the path is changed from the bottom of the second vent 40 to the side 44, and the second vent (a) is formed through the spark hole 44a formed in the side 44. 40 can be moved into the interior of the inlet space.
  • the spark 41a generated in the first vent 41 is discharged into the inlet space through the spark hole 44a of the second vent 40 through the curved path. It is possible to reduce the risk of explosion safety accidents by contacting each other and an effective offset action.
  • FIGS. 1 to 5 refer to the same or similar members of the same or similar function. The detailed description of the same reference numerals will be omitted below.
  • a guide part 147 is formed in the second vent 40 to guide the movement of the spark emitted from the first vent 41. do.
  • the guide part 147 may be applied to an inclined surface formed on the bottom surface 146 of the second vent 40. Therefore, the spark emitted from the first vent 41 may be guided to the spark hole 44a formed in the side portion 44 along the inclined surface of the guide part 147 to be effectively moved.
  • FIG. 7 is a bottom perspective view schematically illustrating a main part in which a second vent according to a third exemplary embodiment of the present invention is installed.
  • the same reference numerals as FIGS. 1 to 6 refer to the same or similar members of the same or similar function. The detailed description of the same reference numerals will be omitted below.
  • the guide part 247 of the rechargeable battery according to the second exemplary embodiment of the present invention may be formed as a guide groove 247 on the bottom 246 of the second vent 40.
  • the guide groove and the guide portion use the same reference numerals.
  • a plurality of guide grooves 247 may be radially formed in the edge direction from the center of the bottom portion 46 of the second vent 40. Therefore, the spark emitted from the first vent 41 may be effectively guided and moved in the direction of the spark hole 44a by the guide groove 247.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

La présente invention concerne une batterie rechargeable. Une batterie rechargeable selon un mode de réalisation de la présente invention comprend : un ensemble d'électrodes comportant une première électrode et une deuxième électrode ; un boîtier dans lequel l'ensemble d'électrodes est incorporé ; une plaque de capuchon couplée à l'ouverture du boîtier, et ayant un premier évent formé à l'intérieur d'un trou d'évent ; une borne d'électrode disposée dans la plaque de capuchon, et comprenant une première borne d'électrode et une deuxième borne d'électrode ; une patte de conducteur comprenant une première patte de collecteur de courant pour connecter l'ensemble d'électrodes à la première borne d'électrode, et une deuxième patte de collecteur de courant pour connecter l'ensemble d'électrodes à la deuxième borne d'électrode ; et un deuxième évent, qui a une surface inférieure espacée du premier évent, une surface latérale espacée d'une surface de paroi interne du trou d'évent tout en recouvrant le trou d'évent, et une pluralité de trous d'étincelle.
PCT/KR2017/009662 2016-09-19 2017-09-04 Batterie rechargeable WO2018052209A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160119098A KR102201278B1 (ko) 2016-09-19 2016-09-19 이차 전지
KR10-2016-0119098 2016-09-19

Publications (1)

Publication Number Publication Date
WO2018052209A1 true WO2018052209A1 (fr) 2018-03-22

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Application Number Title Priority Date Filing Date
PCT/KR2017/009662 WO2018052209A1 (fr) 2016-09-19 2017-09-04 Batterie rechargeable

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KR (1) KR102201278B1 (fr)
WO (1) WO2018052209A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220105948A (ko) * 2021-01-21 2022-07-28 주식회사 엘지에너지솔루션 화재 발생 및 폭발을 방지할 수 있는 구조를 갖는 배터리 팩, 그리고 이를 포함하는 ess
JP2024521647A (ja) * 2022-04-18 2024-06-04 エルジー エナジー ソリューション リミテッド バッテリーパック
KR20230148890A (ko) * 2022-04-18 2023-10-26 주식회사 엘지에너지솔루션 각형 이차전지

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090081175A (ko) * 2008-01-23 2009-07-28 삼성에스디아이 주식회사 이차 전지
US20100279156A1 (en) * 2009-07-09 2010-11-04 Yong-Sam Kim Rechargeable battery
KR101155887B1 (ko) * 2010-02-25 2012-06-20 에스비리모티브 주식회사 이차전지
KR20130057756A (ko) * 2011-11-24 2013-06-03 삼성에스디아이 주식회사 이차전지
JP2015023025A (ja) * 2013-07-19 2015-02-02 三星エスディアイ株式会社Ｓａｍｓｕｎｇ ＳＤＩ Ｃｏ．，Ｌｔｄ． 二次電池

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100870362B1 (ko) * 2007-03-15 2008-11-25 삼성에스디아이 주식회사 이차전지용 보호회로 기판과 이를 이용한 이차전지
KR101502162B1 (ko) * 2008-04-18 2015-03-13 삼성에스디아이 주식회사 이차 전지

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090081175A (ko) * 2008-01-23 2009-07-28 삼성에스디아이 주식회사 이차 전지
US20100279156A1 (en) * 2009-07-09 2010-11-04 Yong-Sam Kim Rechargeable battery
KR101155887B1 (ko) * 2010-02-25 2012-06-20 에스비리모티브 주식회사 이차전지
KR20130057756A (ko) * 2011-11-24 2013-06-03 삼성에스디아이 주식회사 이차전지
JP2015023025A (ja) * 2013-07-19 2015-02-02 三星エスディアイ株式会社Ｓａｍｓｕｎｇ ＳＤＩ Ｃｏ．，Ｌｔｄ． 二次電池

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KR20180031136A (ko) 2018-03-28
KR102201278B1 (ko) 2021-01-08

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