[go: up one dir, main page]

WO2015068871A1 - Dispositif pour empêcher la surcharge de cellule de batterie pour batterie rechargeable - Google Patents

Dispositif pour empêcher la surcharge de cellule de batterie pour batterie rechargeable Download PDF

Info

Publication number
WO2015068871A1
WO2015068871A1 PCT/KR2013/010122 KR2013010122W WO2015068871A1 WO 2015068871 A1 WO2015068871 A1 WO 2015068871A1 KR 2013010122 W KR2013010122 W KR 2013010122W WO 2015068871 A1 WO2015068871 A1 WO 2015068871A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
charge
sensing member
discharge line
battery
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/KR2013/010122
Other languages
English (en)
Korean (ko)
Inventor
이지석
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.)
SK Innovation Co Ltd
Original Assignee
SK Innovation Co 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
Application filed by SK Innovation Co Ltd filed Critical SK Innovation Co Ltd
Priority to PCT/KR2013/010122 priority Critical patent/WO2015068871A1/fr
Publication of WO2015068871A1 publication Critical patent/WO2015068871A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • 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 an overcharge preventing device for a secondary battery, and more particularly, to an overcharge preventing device for a secondary battery battery cell that blocks charging power by physically detecting the expansion of the battery cell without power supply when the battery cell is overcharged.
  • secondary batteries are rechargeable and have a large capacity, such as nickel cadmium, nickel hydrogen, and lithium ion batteries.
  • the lithium ion battery has attracted attention as a next generation power source due to its excellent characteristics such as long life and high capacity.
  • an abnormal use environment such as overcharging, short circuit, reverse connection, and heat exposure
  • gas due to electrochemical action is generated inside the battery, thereby increasing the battery internal pressure.
  • Increasing the internal pressure of the battery causes the battery to expand and in particular, if abnormal use time such as overcharging continues, the electrolyte or the active material is partially decomposed, and the internal pressure and temperature of the battery may rise rapidly, causing an explosion or fire.
  • thermal stability tests such as high temperature storage test, thermal shock test, and heat exposure test, as well as tests of overcharge, overdischarge, short circuit, reverse connection, etc., are conducted. Under these thermal safety test conditions, there should be no explosion or ignition of the battery.
  • an object of the present invention is to provide a sensing unit short-circuited by the expansion of the battery cell, by connecting the sensing unit in parallel to the charging and discharging line in charge of the expansion of the battery cell
  • the present invention provides an overcharge preventing device for a secondary battery battery cell, which short-circuits a discharge line and induces disconnection of a charge / discharge line to block charging power supplied to the battery cell.
  • a current concentration section is formed on the charge / discharge line when the charge / discharge line is short-circuited, and disconnection is made in the current concentration section, thereby providing an overcharge preventing device for the secondary battery battery cell that can arbitrarily set the disconnection section of the charge / discharge line. have.
  • the overcharge preventing device of the present invention at least one or more battery cells, and the overcharge preventing device of a secondary battery battery cell comprising a charge and discharge line for charging and discharging the battery cell, the overcharge preventing device, the battery cell
  • a detector disposed adjacent to and short-circuited when the battery cell is expanded beyond a predetermined thickness; Includes, the sensing unit is connected in parallel on the charge and discharge line.
  • the sensing unit a conductive material, the first sensing member connected to the anode line of the charge and discharge line; And a second sensing member disposed to be spaced apart from the first sensing member at a predetermined distance and connected to the cathode line of the charge / discharge line using a conductive material.
  • the first sensing member or the second sensing member is shorted in contact with the other of the first sensing member or the second sensing member by interlocking when the battery cell is expanded.
  • the disconnection unit is disconnected when the detection unit short-circuited; Is provided, the disconnection portion is formed thinner than the average thickness of the charge and discharge line.
  • the disconnection part includes an electrode tab of the battery cell.
  • the disconnection part is made of a material having a low melting point so as to be disconnected by heat during disconnection of the charge / discharge line.
  • the overcharge preventing device of the secondary battery battery cell of the present invention having the above configuration is easy to secure the space inside the secondary battery because the size of the sensing unit for detecting the expansion of the battery is easy, there is an excellent space utilization.
  • the detection unit does not need a separate power supply, there is no fear of malfunction, and unless a mechanical defect occurs, effectively detecting an overcharge of the battery cell, thereby blocking the charging power, thereby preventing an accident due to battery overcharge.
  • 1A is a battery cell perspective view
  • 1B is a schematic side view of a battery cell
  • 1C is a schematic side view of the battery cell when inflated
  • Figure 4 is an operating state of the overcharge prevention device of the present invention (normal)
  • CL charge / discharge line
  • CL1 anode line
  • the present invention focuses on the fact that the battery cell expands during overcharging, and short-circuits the sensing unit through the expansion load of the battery cell, and connects the sensing unit in parallel to the charging / discharging line, thereby disconnecting the charging / discharging line of the battery cell by short-circuiting the sensing unit. It is to provide an overcharge preventing device that prevents charging from proceeding any further. At this time, since the sensing unit is operated in conjunction with the physical load, there is an advantage that the possibility of malfunction is rare unless a mechanical defect such as an impact or damage is not generated, without a power source. In addition, since it can be implemented in a simple configuration, it is easy to secure space and has an excellent space utilization.
  • the battery cell 20 applied to the overcharge protection device is made of a sealed structure. Normally, as shown in FIG. 1B, the battery cell 20 has a constant thickness. When the battery cell 20 is placed in an excessive state such as overcharge, short circuit, reverse connection, heat exposure due to the nature of the sealed structure, gas is generated inside the battery cell 20 and expands as shown in FIG. 1C, and expansion is performed. If continued, the battery cell 20 may ignite and explode when chemicals such as electrolytes are leaked or the degree is severe.
  • the overcharge preventing apparatus includes a sensing unit 10 installed adjacent to a side of a battery cell 20 in which a plurality of stacked cells are stacked.
  • the detector 10 detects the expansion of the battery cell 20 adjacent to the side of the battery cell 20.
  • the sensing unit 10 may include a first sensing member 11 made of a conductive material, a conductive material, and spaced apart from the first sensing member 11 by a predetermined distance.
  • the second sensing member 12, the first sensing member 11, and the second sensing member 12 may include a case 13 accommodated therein.
  • the first sensing member 11 has a plate shape having a predetermined length and width, and is fixedly installed in the case 13.
  • the second sensing member 12 may have a plate shape having a predetermined length and width, spaced apart from the first sensing member 11 by a predetermined distance, and installed adjacent to the side surface of the battery cell 20.
  • the second sensing member 12 is preferably disposed to contact the first sensing member 11 by the expansion pressure when the battery cell 20 is inflated, and the first sensing member 11 and the second sensing member 12 are When contacted is configured to short-circuit each other.
  • the separation distance between the first sensing member 11 and the second sensing member 12 may be adjusted according to the size and capacity of the battery cell 20. That is, when the expansion displacement of the battery cell 20 is large, the separation distance between the first sensing member 11 and the second sensing member 12 is long, and when the expansion displacement of the battery cell 20 is small, the first sensing member 11 is small.
  • the separation distance between the second sensing member 12 may be configured to be short.
  • any shape may be applied.
  • the case 13 has a space formed therein and has a housing shape having an open surface formed on one surface thereof.
  • the case 13 has a space formed therein to accommodate the first sensing member 11 and the second sensing member 12 spaced apart by a predetermined distance therein, and the opening surface is installed to be in contact with the side surface of the battery cell 20. Can be. Therefore, the overcharge preventing device of the present invention is excellent in space utilization because it can be installed if only the space that can be fixed to the case 13, there is an advantage that there is no restriction in the installation position.
  • the overcharge preventing apparatus further includes a charge / discharge line CL and a disconnection part 30.
  • the charge / discharge line CL may be supplied with external power to charge the battery cell 20, and a general high voltage line for discharging power of the battery cell 20 may be applied to a device requiring a power source.
  • the charge / discharge line CL is composed of an anode line CL1 and a cathode line CL2.
  • the first sensing member 11 is electrically connected to the anode line CL1, and the second sensing member 12 is electrically connected to the cathode line CL2.
  • the disconnection portion 30 is provided to arbitrarily designate the disconnection portion of the charge / discharge line CL.
  • the disconnection part 30 may be formed on the charge / discharge line CL and may be made of a material having a low melting point to facilitate disconnection when high heat is generated due to overcurrent.
  • the disconnection unit 30 may be applied to a separate member or to an electrode tab that is a component of the battery cell 20.
  • the disconnection part 30 may be formed to have a thickness smaller than the average thickness of the charge / discharge line CL. This is to induce a disconnection in the disconnection unit 30 when an overcurrent is applied by reducing the resistance of the disconnection unit 30 to the charge / discharge line CL.
  • the disconnection unit 30 may be disposed at a safe point where explosion or ignition does not occur on the secondary battery during disconnection, thereby preventing secondary accidents due to disconnection of the charge / discharge line CL.
  • the first sensing member 11 and the second sensing member 12 are spaced apart at a predetermined distance during normal operation of the battery cell 20 to charge and discharge the battery. It is configured to have no influence on the charging or discharging of the line CL.
  • the overcharge preventing apparatus of the present invention when the battery cell 20 is overcharged and expanded, the first sensing member 11 and the second sensing member 12 are shorted to contact each other, and the first sensing member ( 11) and the second sensing member 12 short-circuit the charge-discharge line (CL) connected in parallel so that the overcurrent is applied on the charge-discharge line (CL).
  • the charge / discharge line CL is overheated due to the overcurrent application, and the short circuit 30 provided on the charge / discharge line CL is disconnected due to overheating, thereby disconnecting the charge / discharge line CL.
  • the short circuit unit 30 may be disposed in any section on the charge / discharge line CL, and thus, the short circuit unit 30 may be disposed in a section where the risk of ignition and explosion on the secondary battery may be caused by disconnection of the charge / discharge line CL. Secondary accidents can be prevented beforehand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un dispositif pour empêcher la surcharge d'une batterie rechargeable et, plus particulièrement, un dispositif pour empêcher la surcharge d'une cellule de batterie pour une batterie rechargeable, le dispositif détectant physiquement une dilatation d'une cellule de batterie sans alimentation électrique et arrêtant l'électricité de charge lorsque la cellule de batterie est surchargée.
PCT/KR2013/010122 2013-11-08 2013-11-08 Dispositif pour empêcher la surcharge de cellule de batterie pour batterie rechargeable Ceased WO2015068871A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2013/010122 WO2015068871A1 (fr) 2013-11-08 2013-11-08 Dispositif pour empêcher la surcharge de cellule de batterie pour batterie rechargeable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2013/010122 WO2015068871A1 (fr) 2013-11-08 2013-11-08 Dispositif pour empêcher la surcharge de cellule de batterie pour batterie rechargeable

Publications (1)

Publication Number Publication Date
WO2015068871A1 true WO2015068871A1 (fr) 2015-05-14

Family

ID=53041638

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2013/010122 Ceased WO2015068871A1 (fr) 2013-11-08 2013-11-08 Dispositif pour empêcher la surcharge de cellule de batterie pour batterie rechargeable

Country Status (1)

Country Link
WO (1) WO2015068871A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107923954A (zh) * 2015-08-25 2018-04-17 奥克斯能源有限公司 电池传感器
WO2018217040A1 (fr) * 2017-05-26 2018-11-29 주식회사 엘지화학 Module de batterie et bloc-batterie, et automobile les comprenant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090113521A (ko) * 2008-04-28 2009-11-02 에스케이에너지 주식회사 전기자동차용 2차 전지의 안전 스위치 및 이를 이용한전기자동차용 2차 전지의 충방전 시스템
KR20100123598A (ko) * 2009-05-14 2010-11-24 에스비리모티브 주식회사 이차전지
KR20120134698A (ko) * 2011-06-03 2012-12-12 에스케이이노베이션 주식회사 2차 전지 배터리 셀의 과충전 방지장치
KR20130044877A (ko) * 2011-10-25 2013-05-03 현대자동차주식회사 배터리의 과충전 방지장치
KR20130051166A (ko) * 2011-11-09 2013-05-20 현대자동차주식회사 배터리의 과충전 방지장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090113521A (ko) * 2008-04-28 2009-11-02 에스케이에너지 주식회사 전기자동차용 2차 전지의 안전 스위치 및 이를 이용한전기자동차용 2차 전지의 충방전 시스템
KR20100123598A (ko) * 2009-05-14 2010-11-24 에스비리모티브 주식회사 이차전지
KR20120134698A (ko) * 2011-06-03 2012-12-12 에스케이이노베이션 주식회사 2차 전지 배터리 셀의 과충전 방지장치
KR20130044877A (ko) * 2011-10-25 2013-05-03 현대자동차주식회사 배터리의 과충전 방지장치
KR20130051166A (ko) * 2011-11-09 2013-05-20 현대자동차주식회사 배터리의 과충전 방지장치

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107923954A (zh) * 2015-08-25 2018-04-17 奥克斯能源有限公司 电池传感器
US10955485B2 (en) 2015-08-25 2021-03-23 Oxis Energy Limited Battery sensor
WO2018217040A1 (fr) * 2017-05-26 2018-11-29 주식회사 엘지화학 Module de batterie et bloc-batterie, et automobile les comprenant
US11121434B2 (en) 2017-05-26 2021-09-14 Lg Chem, Ltd. Battery module and battery pack and vehicle comprising the same

Similar Documents

Publication Publication Date Title
KR101944837B1 (ko) 이차 전지용 배터리 셀의 과충전 방지장치
RU2468477C2 (ru) Аккумуляторная батарея среднего или большого размера повышенной безопасности
US8547069B2 (en) Safety switch for secondary battery module for electric vehicle and charging and discharging system for secondary battery module for electric vehicle using the same
EP2741348B1 (fr) Bloc-batterie à sécurité améliorée
CN101861666B (zh) 安全性提高的电池模块和含有所述电池模块的中型或大型电池组
US20180366717A1 (en) Single-cell battery, battery module, battery pack, and electric vehicle
EP2768047A1 (fr) Bloc de batteries doté d'une sécurité améliorée
WO2012157855A1 (fr) Bloc-batterie offrant une sécurité améliorée
WO2011037335A2 (fr) Batterie secondaire et procédé de fabrication associé
KR20150116269A (ko) 이차 전지용 보호 장치
KR100809453B1 (ko) 다병렬 및 다직렬 리튬 2차전지 팩의 충방전 모니터링시스템
WO2016122129A1 (fr) Bloc batterie
WO2012148211A2 (fr) Module de batterie
KR101836412B1 (ko) 2차 전지 배터리 셀의 과충전 방지장치
KR101608694B1 (ko) 2차 전지용 과충전 방지 장치
WO2019151680A1 (fr) Bloc-batterie
TWI714978B (zh) 鋰離子電池模組及其運用之健康監視和安全保護裝置與方法
WO2015068871A1 (fr) Dispositif pour empêcher la surcharge de cellule de batterie pour batterie rechargeable
US20240128616A1 (en) Battery pack
WO2015030475A1 (fr) Appareil pour empêcher une surcharge de batterie
WO2013154264A1 (fr) Batterie rechargeable de type poche
WO2017043764A1 (fr) Bloc-piles
WO2014192986A1 (fr) Appareil pour empêcher la surcharge d'une cellule de batterie secondaire
KR20160057206A (ko) 배터리 보호장치 및 이를 이용한 배터리 보호 방법
KR20250030845A (ko) 원통형 리튬 이차 전지

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13896942

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13896942

Country of ref document: EP

Kind code of ref document: A1