WO2015079672A1 - Batterie cylindrique - Google Patents

Batterie cylindrique Download PDF

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Publication number
WO2015079672A1
WO2015079672A1 PCT/JP2014/005880 JP2014005880W WO2015079672A1 WO 2015079672 A1 WO2015079672 A1 WO 2015079672A1 JP 2014005880 W JP2014005880 W JP 2014005880W WO 2015079672 A1 WO2015079672 A1 WO 2015079672A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
cylindrical battery
current
battery case
pressure
Prior art date
Application number
PCT/JP2014/005880
Other languages
English (en)
Japanese (ja)
Inventor
智彦 横山
吉洋 塩津
Original Assignee
三洋電機株式会社
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 三洋電機株式会社 filed Critical 三洋電機株式会社
Publication of WO2015079672A1 publication Critical patent/WO2015079672A1/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 of a single cell or a single battery
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • 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
    • 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 cylindrical battery in which a wound electrode group is stored in a battery case.
  • chargeable / dischargeable cylindrical batteries have high energy density, when overcharge occurs due to external short circuit or equipment failure, rapid gas generation occurs due to chemical reaction such as rapid charge / discharge reaction inside the battery. As a result, the battery case may expand or further rupture. Therefore, many cylindrical batteries are provided with a current interrupt mechanism that interrupts the energization current when the pressure in the battery reaches a predetermined value.
  • the opening of the battery case is sealed using a sealing plate provided with a valve body that breaks when the pressure in the battery reaches a predetermined value.
  • the valve body is broken, whereby the energization current is interrupted and the external short circuit or overcharge is not continued.
  • the present invention has been made in view of the above problems, and its main object is to provide a cylindrical battery having an excellent safety with a current interruption mechanism that operates at a stable operating pressure without being influenced by atmospheric pressure. It is to provide.
  • the present invention provides a cylindrical battery including a power generation element, a cylindrical battery case that houses the power generation element, and an assembly sealing body that seals an opening of the battery case.
  • the sealing plate has a sealed space at least partially configured by a current interrupting mechanism.
  • the present invention it is possible to provide a cylindrical battery with excellent safety, in which the current interruption mechanism operates reliably without being influenced by the atmospheric pressure when an abnormality such as overcharge occurs.
  • FIG. 1 to 5 are diagrams showing the configuration of a cylindrical nonaqueous electrolyte secondary battery according to an embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of a sealing plate of a conventional cylindrical nonaqueous electrolyte secondary battery.
  • an electrode group 20 in which a positive electrode 2 and a negative electrode 3 are wound through a separator (porous insulating layer) 4 has a bottomed cylindrical shape as a power generation element together with a non-aqueous electrolyte (not shown).
  • the battery case 1 is housed.
  • a ring-shaped upper insulating plate 8 and a lower insulating plate 9 are arranged above and below the electrode group 20, the positive electrode 2 is joined to the filter 14 via the positive electrode lead 6, and the negative electrode 3 is connected via the negative electrode lead 7.
  • the filter 14 is joined to the current interruption mechanism 12 which is a metal valve plate. Further, the current interrupt mechanism 12 is connected to a terminal plate 11 that also serves as a positive terminal.
  • the terminal plate 11, the current interruption mechanism 12, the inner gasket 13 as an insulator, and the filter 14 are integrated to form an assembly sealing plate 5, and the opening of the battery case 1 is sealed via the outer gasket 15. ing.
  • the inner gasket 13 is disposed between the flat portion 12b of the current interrupting mechanism 12 and the filter caulking portion 14c of the filter 14 to prevent the flat portion 12b and the filter caulking portion 14c from contacting each other.
  • the current interrupting mechanism 12 is formed with a diaphragm 12a that disconnects the joint with the filter 14 when the pressure in the battery rises and reaches a predetermined pressure (first operating pressure). There is a sealed space between the mechanism 12 and the terminal plate 11. With this configuration, when the pressure inside the battery reaches a predetermined pressure at the time of abnormality, the sealed space between the terminal plate 11 is not affected by the pressure change outside the battery due to atmospheric pressure, etc. A cylindrical battery that can cut off the current and has excellent safety can be realized. In addition, you may interrupt
  • the volume of the sealed space is 3% or more and 20% or less of the volume other than the parts (including the electrolytic solution in the parts) in the space for storing the power generation element. If the volume of the sealed space is less than 3%, it is not preferable because it is difficult to produce an assembly sealing plate, and if the volume of the sealed space exceeds 20%, the battery capacity per volume is not preferable.
  • a battery case thin portion 1a that is broken when the pressure in the battery reaches a predetermined value (second operating pressure) is formed on the bottom or side of the battery case 1, It is preferable that the safety valve is comprised by the battery case thin part 1a. It is preferable to provide the battery case thin portion 1a because gas can be exhausted to the outside of the battery and safety can be ensured when the pressure increases rapidly.
  • the material of the current interrupting mechanism is preferably aluminum or an aluminum alloy
  • the material of the terminal plate is preferably iron, nickel or a nickel alloy.
  • Aluminum is excellent in drawability and weldability in parts processing, so it is suitable for thinning and diaphragms, has low resistance, and does not affect battery characteristics.
  • Iron (including nickel-plated) and nickel are excellent in strength and resistant to external impact.
  • the breaking pressure of the battery case thin portion 1a is formed so as to be larger than the pressure at which the joint between the diaphragm 12a and the filter 14 is cut off. That is, the second operating pressure is set higher than the first operating pressure.
  • a temperature sensing type current interruption element (Positive Coefficient: PTC) may be interposed between the current interruption mechanism 12 and the terminal plate 11.
  • first operating pressure and the second operating pressure are not uniquely determined, and may be appropriately determined in consideration of the type of battery used, an assumed gas generation mode (pressure increase mode), and the like. Good.
  • the second operating pressure is set lower than the pressure resistance of the battery case (or the pressure resistance of the sealing plate), but is preferably set in the range of 2 to 8 MPa.
  • the second operating pressure is set to less than 2 MPa, the case bottom thin portion may be broken only by the battery being subjected to some weak impact such as dropping, and the electrolyte may flow out from the inside of the battery.
  • the second operating pressure is set to 8 MPa or more, the case bottom thin-walled portion may not be in time for the rapid gas generation, and the sealing portion may be deformed to cause rupture.
  • the current interruption mechanism may be constituted by an upper valve plate 16 and a lower valve plate 17. If the current cut-off mechanism is composed of an upper valve plate and a lower valve plate, it can be broken due to thinning, and in general, the current can be supplied more stably than the current cut-off mechanism that cuts off joints such as welding like a diaphragm. Can be blocked.
  • the terminal plate 11, the circular upper valve plate 16, the lower valve plate 17, the inner gasket 13, and the filter 14 are integrated to form the assembly sealing plate 5.
  • the inner gasket 13 is disposed between the periphery of the upper valve plate 16 and the periphery of the lower valve plate 17 to prevent the periphery of the upper valve plate 16 and the periphery of the lower valve plate 17 from contacting each other. It is out.
  • the upper valve plate 16 is formed with a circular inner portion 16a surrounded by an annular groove 16c at the center.
  • the inner part 16a of the upper valve plate 16 is supported by an outer part 16b around the inner part 16a.
  • the lower valve plate 17 has a circular inner portion 17a surrounded by an annular groove 17c formed at the center.
  • the inner part 17a of the lower valve plate 17 is supported by an outer part 17b around the inner part 17a.
  • the nonaqueous electrolyte secondary battery has been described as an example of the cylindrical battery.
  • the present invention is not limited thereto, and examples thereof include a lead storage battery, a nickel cadmium secondary battery, a nickel hydrogen secondary battery, and an alkaline dry battery. It can also be applied to.
  • the type of the non-aqueous electrolyte secondary battery is not particularly limited, and can be applied to, for example, a lithium ion secondary battery and a lithium primary battery.
  • the cylindrical battery according to the present invention is suitably used for electronic devices such as personal computers and mobile phones, and electric power sources such as electric vehicles and electric tools.

Abstract

La présente invention concerne une batterie cylindrique permettant, lorsque la pression à l'intérieur de la batterie atteint une valeur de pression prédéterminée lors de l'occurrence d'une anomalie telle que, par exemple, un court-circuit externe, de couper de manière fiable le courant par activation d'un mécanisme de coupure de courant sans être affectée par un environnement externe tel que, par exemple, la pression atmosphérique et offrant, par conséquent, une excellente sécurité. La batterie cylindrique comprend un élément générateur de courant, un bac d'accumulateurs cylindrique doté d'un fond servant à loger l'élément générateur de courant, et une plaque d'étanchéité d'ensemble servant à étancher la partie d'ouverture du bac d'accumulateurs, la plaque d'étanchéité d'ensemble comportant un espace hermétique, dont au moins une partie est constituée par un mécanisme de coupure de courant.
PCT/JP2014/005880 2013-11-29 2014-11-25 Batterie cylindrique WO2015079672A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-247141 2013-11-29
JP2013247141 2013-11-29

Publications (1)

Publication Number Publication Date
WO2015079672A1 true WO2015079672A1 (fr) 2015-06-04

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Family Applications (1)

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PCT/JP2014/005880 WO2015079672A1 (fr) 2013-11-29 2014-11-25 Batterie cylindrique

Country Status (1)

Country Link
WO (1) WO2015079672A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016121319A1 (fr) * 2015-01-30 2016-08-04 三洋電機株式会社 Batterie secondaire cylindrique à électrolyte non aqueux
CN105977411A (zh) * 2016-06-27 2016-09-28 宁德时代新能源科技股份有限公司 二次电池顶盖及二次电池
JP2017059526A (ja) * 2015-09-16 2017-03-23 パナソニック株式会社 非水電解質二次電池

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60155174U (ja) * 1984-03-24 1985-10-16 日本電池株式会社 密閉式円筒形アルカリ蓄電池
JP2004063254A (ja) * 2002-07-29 2004-02-26 Sanyo Electric Co Ltd 密閉型電池
JP2008027668A (ja) * 2006-07-19 2008-02-07 Sony Corp 電池

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60155174U (ja) * 1984-03-24 1985-10-16 日本電池株式会社 密閉式円筒形アルカリ蓄電池
JP2004063254A (ja) * 2002-07-29 2004-02-26 Sanyo Electric Co Ltd 密閉型電池
JP2008027668A (ja) * 2006-07-19 2008-02-07 Sony Corp 電池

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016121319A1 (fr) * 2015-01-30 2016-08-04 三洋電機株式会社 Batterie secondaire cylindrique à électrolyte non aqueux
JP2017059526A (ja) * 2015-09-16 2017-03-23 パナソニック株式会社 非水電解質二次電池
US10535860B2 (en) 2015-09-16 2020-01-14 Panasonic Corporation Nonaqueous electrolyte secondary battery
CN105977411A (zh) * 2016-06-27 2016-09-28 宁德时代新能源科技股份有限公司 二次电池顶盖及二次电池

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