WO2015119307A1 - Module d'accumulateurs au lithium et bloc-batterie d'accumulateurs au lithium à sécurité améliorée - Google Patents

Module d'accumulateurs au lithium et bloc-batterie d'accumulateurs au lithium à sécurité améliorée Download PDF

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Publication number
WO2015119307A1
WO2015119307A1 PCT/KR2014/000955 KR2014000955W WO2015119307A1 WO 2015119307 A1 WO2015119307 A1 WO 2015119307A1 KR 2014000955 W KR2014000955 W KR 2014000955W WO 2015119307 A1 WO2015119307 A1 WO 2015119307A1
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WO
WIPO (PCT)
Prior art keywords
lithium secondary
secondary battery
battery module
improved safety
gas
Prior art date
Application number
PCT/KR2014/000955
Other languages
English (en)
Korean (ko)
Inventor
홍지준
고성태
허윤정
Original Assignee
주식회사 코캄
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 주식회사 코캄 filed Critical 주식회사 코캄
Publication of WO2015119307A1 publication Critical patent/WO2015119307A1/fr

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    • 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
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • 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
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • 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
    • H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
    • 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
    • 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 lithium secondary battery module and a lithium secondary battery pack with improved safety, and more particularly, it is possible to suppress sudden heat generation or destruction due to overcharging, overdischarging, thermal shock, or penetration of an external needle object, and the like.
  • the present invention relates to a lithium secondary battery module and a lithium secondary battery pack including a gas adsorption sheet capable of ensuring safety from the risks of the present invention.
  • secondary batteries used as driving power sources.
  • Such secondary batteries include, for example, nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and lithium secondary batteries.
  • Lithium secondary battery has the advantage of long life and large capacity.
  • the lithium secondary battery includes an organic electrolyte including lithium salt in an assembly having a positive electrode and a negative electrode having an active material capable of inserting and removing lithium ions on each current collector, and a porous separator that electrically insulates them between the positive and negative electrodes. Or a structure filled with a polymer electrolyte solution.
  • a lithium secondary battery is a situation in which safety issues are raised as the range of use is widened.
  • efforts are made to improve the safety of the lithium secondary battery by using materials having excellent safety, such as an overcharge suppressor or a high heat resistant separator, as components.
  • a battery module or a battery pack in which a plurality of lithium secondary batteries are bundled in a series or parallel manner is secured physically and electrically by using a material of a case or a PTC element.
  • the technical problem to be solved by the present invention is to solve the conventional problems as described above, the safety of the lithium secondary battery module or pack malfunction, or by controlling the gas that can be generated when the needle is infiltrated from the outside safety It is to provide an improved lithium secondary battery module and a lithium secondary battery pack.
  • a plurality of lithium secondary batteries having an electrode assembly having an electrically separated positive electrode terminal and a negative electrode terminal and a receiving portion for fixing the electrode assembly is in close contact with each other or Lithium secondary battery modules that are connected in series or in parallel through a connecting portion in an adjacent stacked state, and are formed on an outer surface of a lithium secondary battery positioned at the outermost side of the lithium secondary battery module or interposed between the plurality of lithium secondary batteries.
  • the lithium secondary battery module with improved safety characterized in that it further comprises a gas adsorption sheet formed on or formed on the side of the stacked lithium secondary batteries.
  • the gas adsorption sheet may include a polyolefin-based polymer resin and a gas adsorption material.
  • the gas adsorption sheet may be a mixture of the polyolefin-based polymer resin and the gas adsorption material in a weight ratio of 20:80 to 80:20.
  • the gas adsorbent may be silica gel, bentonite or a mixture thereof.
  • the average particle diameter of the gas adsorbent may be 0.8 to 20 ⁇ m.
  • the specific surface area by the BET measuring method of the gas adsorbent may be 1 to 50 m 2 / g.
  • the polyolefin-based polymer resin may be any one selected from the group consisting of polyethylene, polypropylene, polybutene, polymethylpentene, and copolymers thereof, or a mixture of two or more thereof.
  • a plurality of lithium secondary batteries having an electrode assembly having an electrically separated positive electrode terminal and a negative electrode terminal and an accommodating portion for fixing the electrode assembly are in close contact or adjacent stacked state
  • the connection portion A plurality of lithium secondary battery modules that are connected in series or in parallel through a plurality of lithium secondary battery packs are connected in series or in parallel to each other in a close or adjacent stacked state, the lithium secondary battery pack is located at the outermost of the lithium secondary battery pack
  • Safety is characterized in that it further comprises a gas adsorption sheet formed on the outer surface of the battery module, interposed between the plurality of lithium secondary battery modules, or formed on the side of the stacked lithium secondary battery modules An improved lithium secondary battery pack is provided.
  • the lithium secondary battery module may be a lithium secondary battery module according to the present invention described above.
  • the internal temperature rises due to abnormal behavior in the lithium secondary battery included in the lithium secondary battery module or pack by including a gas adsorption sheet it flows outside the lithium secondary battery due to vaporization of the electrolyte.
  • the safety of the lithium secondary battery module or the lithium secondary battery pack can be further improved by absorbing the gas to suppress the ignition or suppress the temperature rise and the ignition due to local energy concentration for reasons such as external penetration of the needle. have.
  • 1 to 3 is an exploded perspective view schematically showing a lithium secondary battery module manufactured according to an embodiment of the present invention.
  • FIGS. 4 and 5 are exploded perspective views schematically showing a lithium secondary battery pack manufactured according to another embodiment of the present invention.
  • the lithium secondary battery module 200 having improved safety according to an aspect of the present invention includes an electrode assembly including an electrically separated positive electrode terminal and a negative electrode terminal, and an accommodating structure for fixing the electrode assembly.
  • a plurality of lithium secondary batteries 100 having a portion as a lithium secondary battery module 200 is connected in series or parallel through the connection portion 101 in close contact or adjacent stacked state, the lithium secondary battery module 200 Is formed on the outer surface of the lithium secondary battery 100 which is located at the outermost of the, interposed between the plurality of lithium secondary batteries 100, or formed on the side of the stacked lithium secondary batteries 100 Characterized in that it further comprises a gas adsorption sheet 300.
  • the lithium secondary battery 100 When the internal temperature is increased by abnormal behavior in the lithium secondary battery 100 included in the lithium secondary battery module 200 by including the gas adsorption sheet 300, the lithium secondary battery 100 may be caused due to vaporization of an electrolyte.
  • the safety of the lithium secondary battery module can be further improved by absorbing the gas flowing to the outside to suppress ignition, or by suppressing a rise in temperature and ignition due to local energy concentration for reasons such as external needle penetration.
  • the lithium secondary battery 100 which is a unit cell included in the lithium secondary battery module 200, is represented as a specific number.
  • the outside of the lithium secondary battery positioned at the outermost side of the lithium secondary battery module 200 in which the plurality of lithium secondary batteries 100 are stacked. It may be formed on the surface, as shown in Figure 2 interposed between the plurality of lithium secondary batteries 100, or may be formed on the side of the stacked lithium secondary batteries 100 as shown in FIG.
  • the gas adsorption sheet 300 may include a polyolefin-based polymer resin and a gas adsorbent.
  • the gas adsorption sheet 300 may include 20:80 to 80: It may be mixed in a weight ratio of 20.
  • the content of the polyolefin-based polymer resin exceeds the above-mentioned upper limit, the content of the gas adsorbent is relatively reduced, the gas absorption capacity generated in the battery is lowered, the content of the polyolefin-based polymer resin is the lower limit described above If less than that, the content of the gas adsorbent is relatively increased, so that the gas absorption ability is excellent, but the content of the binder necessary for producing the sheet shape is relatively small, resulting in difficulty in application since the uniformity of the sheet is lowered.
  • the gas adsorbent is not limited in terms of adsorption by physical adsorption or chemical adsorption, and may be used without limitation as long as it has gas absorption capability.
  • the gas adsorbent may be mainly silica gel, bentonite or a mixture thereof.
  • the mixture it is classified into a gas adsorbent having a physical adsorption method and a chemical adsorption method according to the mixing ratio of silica gel and bentonite.
  • the silica gel is an adsorbent prepared by solidifying a colloidal solution of silicic acid, and is well known as a desiccant or absorbent. It is composed of SiO 2 , has a very large porosity, and has a very uniform distribution or size of pores. Silica gel is a granular amorphous particle with fine pores connected to each other and connected by a massive net, and is characterized by its excellent adsorption capacity according to the vast surface area.
  • the bentonite is clay made of montmorillonite-based expandable three-layer plate (Si-Al-Si), and is composed of Al 2 Si 4 (OH), which is a feldspar chemical formula.
  • Bentonite is bipolar due to the unbalance of charge generated in the Gibbsite layer, which is an intermediate layer.Bentonite has a positive polarity at each corner of the bentonite layer and a negative surface at the surface thereof. It has the adsorption performance. And, due to this bipolarity attracts more gas and moisture is to be adsorbed into the interlayer space.
  • the Gibbsite layer which is an intermediate layer of aluminum oxide
  • aluminum (Al) having 3+ valence is replaced with magnesium (Mg) having 2+ valence, and a form in which 1+ is insufficiently satisfied with Na is satisfied.
  • Sodium bentonite which is very good at absorbing gas and water, has the ability to absorb up to five times its weight.
  • even at a high temperature such properties do not change, and even if the temperature of the battery is increased due to internal or external factors, the gas absorption ability is exhibited without changing the characteristics, and thus the chain reaction of secondary ignition is suppressed.
  • the gas adsorbent used in the present invention may adsorb 733 ml / min of gas on the basis of an average particle diameter of 10 ⁇ m, and may be recycled since the gas adsorbed therein may be removed at a predetermined temperature or more.
  • the average particle diameter of the gas adsorbent may be 0.8 to 20 ⁇ m, or 1 to 10 ⁇ m
  • the specific surface area by the BET measurement method may be 1 to 50 m 2 / g, or 5 to 20 m 2 / g
  • the pore size and shape of the pores are not limited.
  • the polyolefin-based polymer resin may be any one selected from the group consisting of polyethylene, polypropylene, polybutene, polymethylpentene, and copolymers thereof, or a mixture of two or more thereof, but is not limited thereto. no.
  • a lithium secondary battery pack 400 having improved safety includes fixing an electrode assembly and an electrode assembly having an electrically separated positive electrode terminal and a negative electrode terminal.
  • a plurality of lithium secondary batteries 100 having an accommodation part are in close contact with or adjacent to each other in a stacked state, and a plurality of lithium secondary battery modules 200 connected in series or in parallel via a connection part 101 are in close contact or adjacent to each other.
  • the lithium secondary battery pack 400 may be connected in series or in parallel, and may be formed on an outer surface of the lithium secondary battery module 200 positioned at the outermost side of the lithium secondary battery pack 400, or the plurality of lithium batteries. It is characterized in that it further comprises a gas adsorption sheet 300 is formed between the secondary battery modules 200, or formed on the side of the stacked lithium secondary battery modules 200 The.
  • two lithium secondary battery modules 200 included in the lithium secondary battery pack 400 are represented as two, but this is only an example, and the number of the lithium secondary battery modules 200 is limited. Not necessarily, the number of lithium secondary battery modules 200 may be arbitrarily determined according to the use or capacity of the lithium secondary battery pack 400.
  • the lithium secondary battery module positioned at the outermost portion of the lithium secondary battery pack 400 in which the plurality of lithium secondary battery modules 200 are stacked. It may be formed on the outer surface of, or formed on the side of the stacked lithium secondary battery modules 200 as shown in FIG. 5, or may be formed between the plurality of lithium secondary battery modules 200, although not shown.
  • the lithium secondary battery module 200 may be a lithium secondary battery module 200 with improved safety according to the present invention described above.

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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)
  • Battery Mounting, Suspending (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

La présente invention porte sur un module d'accumulateurs au lithium et un bloc-batterie d'accumulateurs au lithium comprenant une feuille absorbant les gaz et dont la sécurité est améliorée. Un mode de réalisation selon la présente invention, grâce à la présence d'une feuille absorbant les gaz, supprime l'allumage par absorption du gaz circulant hors de l'accumulateur au lithium en raison de l'évaporation d'électrolyte lorsque la température interne augmente en raison d'une activité anormale à l'intérieur de l'accumulateur au lithium contenu dans un module ou bloc d'accumulateurs au lithium, ou supprime l'augmentation de température, l'allumage et similaire en raison d'une concentration d'énergie localisée causée par une infiltration par un objet pointu ou similaire provenant de l'extérieur, améliorant ainsi encore la sécurité du module d'accumulateurs au lithium et du bloc-batterie d'accumulateurs au lithium.
PCT/KR2014/000955 2014-02-04 2014-02-04 Module d'accumulateurs au lithium et bloc-batterie d'accumulateurs au lithium à sécurité améliorée WO2015119307A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2014-0012688 2014-02-04
KR1020140012688A KR20150091898A (ko) 2014-02-04 2014-02-04 안전성이 향상된 리튬 이차전지 모듈 및 리튬 이차전지 팩

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10727541B2 (en) 2016-01-06 2020-07-28 Lg Chem, Ltd. Secondary battery comprising gas-absorbing polymer
CN112421177A (zh) * 2020-12-04 2021-02-26 澳大利亚国家电力储能控股有限公司 一种带吸附剂层的蜂窝体电池箱
US20220085432A1 (en) * 2020-09-15 2022-03-17 Sk Innovation Co., Ltd. Lithium secondary battery
US12009491B2 (en) * 2020-09-15 2024-06-11 Sk On Co., Ltd. Lithium secondary battery

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102036586B1 (ko) * 2015-12-02 2019-10-25 주식회사 엘지화학 가스 흡착성 고분자층을 포함하고 있는 파우치형 이차전지
WO2024019414A1 (fr) * 2022-07-20 2024-01-25 주식회사 엘지에너지솔루션 Bloc-batterie et dispositif le comprenant

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JP2004103415A (ja) * 2002-09-10 2004-04-02 Nissan Motor Co Ltd ラミネート二次電池、複数のラミネート二次電池からなる組電池モジュール、複数の組電池モジュールからなる組電池ならびにこれらいずれかの電池を搭載した電気自動車
US20080090143A1 (en) * 2003-03-03 2008-04-17 Nec Lamilion Energy, Ltd. Film covered battery and stacked battery assembly
JP2008146963A (ja) * 2006-12-08 2008-06-26 Sony Corp 非水電解質二次電池用セパレータ、非水電解質二次電池及び電池パック
JP2013080610A (ja) * 2011-10-04 2013-05-02 Yoshiaki Nagaura ゼオライト混合のシリコン化合物電極及び電解質の二次電池モジュール、及び製造方法
KR20130142957A (ko) * 2012-06-20 2013-12-30 주식회사 엘지화학 가스 흡착제가 코팅된 분리막을 포함하는 이차 전지 및 이를 이용한 중대형전지모듈

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004103415A (ja) * 2002-09-10 2004-04-02 Nissan Motor Co Ltd ラミネート二次電池、複数のラミネート二次電池からなる組電池モジュール、複数の組電池モジュールからなる組電池ならびにこれらいずれかの電池を搭載した電気自動車
US20080090143A1 (en) * 2003-03-03 2008-04-17 Nec Lamilion Energy, Ltd. Film covered battery and stacked battery assembly
JP2008146963A (ja) * 2006-12-08 2008-06-26 Sony Corp 非水電解質二次電池用セパレータ、非水電解質二次電池及び電池パック
JP2013080610A (ja) * 2011-10-04 2013-05-02 Yoshiaki Nagaura ゼオライト混合のシリコン化合物電極及び電解質の二次電池モジュール、及び製造方法
KR20130142957A (ko) * 2012-06-20 2013-12-30 주식회사 엘지화학 가스 흡착제가 코팅된 분리막을 포함하는 이차 전지 및 이를 이용한 중대형전지모듈

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10727541B2 (en) 2016-01-06 2020-07-28 Lg Chem, Ltd. Secondary battery comprising gas-absorbing polymer
US20220085432A1 (en) * 2020-09-15 2022-03-17 Sk Innovation Co., Ltd. Lithium secondary battery
US12009491B2 (en) * 2020-09-15 2024-06-11 Sk On Co., Ltd. Lithium secondary battery
CN112421177A (zh) * 2020-12-04 2021-02-26 澳大利亚国家电力储能控股有限公司 一种带吸附剂层的蜂窝体电池箱
WO2022116911A1 (fr) * 2020-12-04 2022-06-09 中澳储能电力科技（西安）有限公司 Boîtier de batterie en nid d'abeilles ayant une couche absorbante
CN112421177B (zh) * 2020-12-04 2023-08-22 澳大利亚国家电力储能控股有限公司 一种带吸附剂层的蜂窝体电池箱

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