WO2013069622A1 - 二次電池 - Google Patents

二次電池 Download PDF

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Publication number
WO2013069622A1
WO2013069622A1 PCT/JP2012/078693 JP2012078693W WO2013069622A1 WO 2013069622 A1 WO2013069622 A1 WO 2013069622A1 JP 2012078693 W JP2012078693 W JP 2012078693W WO 2013069622 A1 WO2013069622 A1 WO 2013069622A1
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WO
WIPO (PCT)
Prior art keywords
additive
secondary battery
internal pressure
end side
electrolyte
Prior art date
Application number
PCT/JP2012/078693
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English (en)
French (fr)
Japanese (ja)
Inventor
晃一 谷山
拓也 宮下
耕嗣 北田
恭平 下山
健治 酒井
Original Assignee
三菱自動車工業株式会社
三菱自動車エンジニアリング株式会社
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 三菱自動車工業株式会社, 三菱自動車エンジニアリング株式会社 filed Critical 三菱自動車工業株式会社
Priority to CN201280055371.9A priority Critical patent/CN103931041B/zh
Priority to KR1020147015103A priority patent/KR101571988B1/ko
Publication of WO2013069622A1 publication Critical patent/WO2013069622A1/ja

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0567—Liquid materials characterised by the additives
    • 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
    • H01M10/058—Construction or manufacture
    • 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
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 secondary battery.
  • a rechargeable lithium ion secondary battery is used as a drive battery mounted on such an electric vehicle.
  • VC vinylene carbonate
  • Patent Document 1 VC is added and the film (henceforth a VC film) by VC is formed in an electrode surface, it has suppressed that SEI is formed too much. However, the VC film is gradually peeled off by the expansion and contraction of the electrode body.
  • this VC is put into a capsule so that VC can be gradually added to the electrolyte with the passage of time, and the VC film peeled off by expansion and contraction is continuously regenerated. Control the formation of As a result, deterioration of the battery is suppressed.
  • Patent Document 1 since the capsule is a sustained release capsule and VC is gradually released with the passage of time, it is possible to recover the deterioration in the use state where the battery is deteriorated with the passage of time, which is effective. There is also.
  • an object of the present invention is to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a secondary battery capable of effectively suppressing the deterioration of the battery without adding an additive excessively.
  • the secondary battery of the present invention is a secondary battery comprising a battery case, an electrode body housed inside the battery case, and an electrolytic solution filled in the battery case, containing an initial additive.
  • the electrode body is characterized in that an adding means for adding a recovery additive for recovering the deteriorated state according to the deteriorated state of the film formed by the initial additive is provided to the electrolytic solution.
  • recovery of the degradation state refers to recovery of the degradation state of the battery due to peeling off of the film from the electrode due to expansion and contraction.
  • the addition means adds the additive to the electrolytic solution when the internal pressure in the battery case due to the deterioration of the secondary battery rises to a predetermined value or more. That is, the deterioration of the battery can be more effectively suppressed by detecting the deterioration of the battery by the increase in internal pressure and adding the additive to the electrolytic solution.
  • the predetermined value is larger than the internal pressure change due to expansion and contraction during charge and discharge of the electrode body.
  • the addition means has a separation means for separating the additive from the electrolytic solution, and the separation means releases the additive to the electrolytic solution by being deformed according to the internal pressure.
  • the separation means releases the additive to the electrolytic solution by being deformed according to the internal pressure.
  • the addition means is a capsule as the separation means containing the additive, and the wall surface of the capsule is broken when the internal pressure reaches a predetermined value or more, and the additive is added to the electrolytic solution. Is preferred. By using such an addition means, an additive for recovering the deteriorated state can be easily added according to the deteriorated state.
  • the addition means is fitted in a tubular member whose one end side is sealed and the other end side is opened, and a hollow portion of the tubular member, and the hollow portion is moved to the one end side by the increase of the internal pressure And a storage unit in communication with the opening provided at one end side of the initial installation position of the moving unit of the cylindrical member, the storage unit containing the additive, It is preferable that the moving part move by the rising to add the additive to the electrolytic solution.
  • an air reservoir part is formed in the said one end side of the said cylindrical member as the said addition means.
  • the additive can be added according to the deterioration state, and the excellent effect that the deterioration of the battery can be effectively suppressed can be exhibited.
  • FIG. 1 is a perspective view of a secondary battery according to a first embodiment.
  • FIG. 1 is a cross-sectional view of a secondary battery according to Embodiment 1.
  • FIG. 6 is a cross-sectional view of a secondary battery according to a second embodiment.
  • FIG. 7 is a schematic view of an addition device according to Embodiment 3. It is a schematic diagram of the addition apparatus concerning another embodiment.
  • FIG. 1 is a perspective view showing a secondary battery according to the present embodiment
  • FIG. 2 (1) is a cross-sectional view taken along the line AA 'of FIG. 1
  • FIG. 2 (2) is B of FIG. It is sectional drawing in-B 'line.
  • the secondary battery 1 includes a substantially rectangular case 11 and a lid 12 disposed at the opening of the case 11 to seal the case 11.
  • the electrode body 13 is housed in the case 11. Further, the inside of the case 11 is filled with the electrolytic solution 14, and the electrode body 13 is immersed in the electrolytic solution 14.
  • the electrode body 13 is formed by winding a laminate of a positive electrode plate and a negative electrode plate with a separator interposed therebetween, and the lamination direction is the lateral direction in the drawing.
  • the lid 12 is provided with a positive electrode terminal 15 and a negative electrode terminal 16.
  • the positive electrode current collector 17 is connected to the positive electrode terminal 15.
  • a negative electrode current collector 18 is connected to the negative electrode terminal 16.
  • the positive electrode current collecting unit 17 and the negative electrode current collecting unit 18 are connected to the positive electrode plate and the negative electrode plate of the electrode body 13 respectively. That is, the positive electrode plate, the positive electrode current collecting portion 17 and the positive electrode terminal 15 are electrically connected to each other. Further, the negative electrode plate, the negative electrode current collector portion 18 and the negative electrode terminal 16 are electrically connected to each other.
  • the positive electrode plate is made of a commonly used positive electrode material.
  • Commonly used positive electrode materials include, for example, metal oxides capable of absorbing and desorbing lithium, such as metal oxides of layered structure type, spinel type metal oxides and metal compounds, metal salts of oxide salt type, etc.
  • the layered structure type metal oxide may, for example, be a lithium nickel composite oxide, a lithium cobalt composite oxide, or a ternary composite oxide (LiCo 1/3 Ni 1/3 Mn 1/3 O 2 ).
  • lithium nickel oxide (LiNiO 2 ) is mentioned as the lithium nickel composite oxide.
  • the lithium cobalt-based composite oxide preferably includes lithium cobaltate (LiCoO 2 ).
  • the spinel-type metal oxides lithium-manganese-based composite oxide such as lithium manganate (LiMn 2 O 4) can be mentioned.
  • the oxide salt type metal oxide include lithium iron phosphate (LiFePO 4 ), lithium manganese phosphate (LiMnPO 4 ), lithium silicon phosphate and the like.
  • the negative electrode plate is made of a commonly used negative electrode active material.
  • the negative electrode active material include commonly used active materials such as metal lithium, lithium alloy, metal oxide, metal sulfide, metal nitride, and carbon materials such as graphite.
  • the metal oxide include those having irreversible capacity such as tin oxide and silicon oxide.
  • the graphite as the carbon-based material may be artificial graphite or natural graphite, and in the present embodiment, graphite is used as the active material of the negative electrode.
  • Each of the positive electrode plate and the negative electrode plate may further contain a binder, and for example, polyvinylidene fluoride can be used.
  • the active material layer may contain a conductivity improver such as acetylene black, an electrolyte (for example, a lithium salt (supporting electrolyte), an ion conductive polymer, etc.).
  • a polymerization initiator for polymerizing the polymer may be included.
  • the electrolyte solution 14 is a mixed solution of a commonly used electrolyte, for example, ethylene carbonate and propylene carbonate which are cyclic carbonates, and linear carbonates, and 1 mol of LiPF 6 in a mixed solution of dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate.
  • the organic electrolyte solution melt
  • vinylene carbonate (VC) is added to the electrolytic solution 14 as an initial additive.
  • the electrolyte solution 14 contains capsules 3 and 3A in which a recovery additive (hereinafter, also simply referred to as an additive) for recovering the film on the surface of the electrode is enclosed.
  • a recovery additive hereinafter, also simply referred to as an additive
  • the additive sealed therein is released, so that the deterioration of the battery can be suppressed.
  • the capsules 3 and 3A are made of a resin insoluble in the electrolyte, and their thicknesses are set so as to break when a predetermined pressure is applied.
  • the capsule 3A is thicker than the capsule 3 and is hard to break.
  • the secondary battery is used, and when lithium ions intercalate in the carbon electrode, lithium ions react with the electrolyte to generate a gas, whereby a solid electrolyte interface layer (SEI) is formed on the surface of the electrode. It is formed. SEI is necessary to stably charge and discharge at the time of initial operation of the secondary battery, but it is a lithium ion that can move between the positive electrode and the negative electrode in a state where SEI continues to be formed thereafter. And the battery capacity is likely to be reduced (deteriorated state).
  • SEI solid electrolyte interface layer
  • VC vinylene carbonate
  • VC vinylene carbonate
  • the use of a secondary battery causes the VC film to peel off from the electrode surface due to expansion and contraction of the electrode.
  • SEI is likely to be formed at the peeled portion, and as a result, lithium ions which can move between the positive electrode and the negative electrode may be reduced to reduce the battery capacity.
  • VC is excessively added in advance in the secondary battery, the VC film may become too thick and internal resistance may increase.
  • the capsules 3 and 3A as an addition means for adding an additive according to the deterioration state of the secondary battery 1, that is, according to the increase in internal pressure, are contained in the electrolyte solution 14 in the secondary battery 1. It is contained.
  • the state in which the internal pressure is rising corresponds to the deterioration state in which the VC film is peeled off and SEI is easily formed due to use as described above. Therefore, if the additive is released according to the increase in internal pressure, Thus, the coating on the electrode surface can be recovered.
  • the VC film can be formed again in the area where the VC film on the electrode surface is peeled off (that is, the VC film can be recovered), and the formation of SEI
  • the deterioration of the battery that is, the capacity decrease due to the reduction of lithium ions which can move between the positive electrode and the negative electrode.
  • the additive is added in a deteriorated state, that is, in a state in which there is a region where the VC film on the electrode surface is peeled off, it is possible to suppress the VC film itself from being thickened and the battery resistance rising.
  • the additive may be released from the capsule even in a state where the number of times of use is low and no deterioration occurs, and this causes the VC film to be thickened. It is not preferable because it is conceivable. Therefore, it is preferable to be able to add an additive in the state which degraded like this embodiment, and, thereby, deterioration of a battery can be effectively suppressed without adding an additive excessively.
  • the internal pressure also changes due to the expansion and contraction of the electrode during charge and discharge, but the internal pressure change due to the expansion and contraction of the electrode is smaller than the internal pressure change due to deterioration. Therefore, the capsule 3 is broken due to the expansion and contraction of the electrode during charge and discharge by setting the predetermined internal pressure value to break the capsule 3 larger than the amount of change in internal pressure due to the expansion and contraction of the electrode during charge and discharge. There is no.
  • the addition of the additive in this way is considered to prevent the internal pressure from turning to decrease, but the formation of the VC film can suppress the increase in internal pressure for a certain period of time. This simultaneously suppresses the deterioration of the battery. Then, when the VC film on the surface of the electrode is peeled off again by the expansion and contraction of the electrode again, the internal pressure gradually increases again. Then, another capsule 3A other than the torn capsule 3 is broken at a low internal pressure to release the additive.
  • each capsules having different thicknesses in the present embodiment, two capsules having different thicknesses are contained, but the invention is not limited thereto), each is broken at a predetermined internal pressure to form a VC film. can do.
  • Examples of the resin insoluble in the electrolyte constituting the capsules 3 and 3A include polyolefins such as polyethylene and polypropylene, polystyrene, nylon, polycaprolactone, polyamide, and cellulose.
  • an additive capable of forming a VC film again is added, but the additive is not limited to the above-described VC.
  • the additive may be any one as long as it can recover the film which has fallen off due to expansion and contraction of the electrode as described above, and examples thereof include vinylene ethylene carbonate, fluoro-ethylene carbonate, succinic anhydride, lactide, caprolactam, Ethylene sulfite, propane sultone (PS), propene sultone, vinyl sulfone, and derivatives thereof and halogen-substituted compounds can be mentioned.
  • an additive for example, ethylenediaminetetraacetic acid, tetramethylethylenediamine, pyridine, dipyridyl, ethylenebis (diphenylphosphine), butyronitrile, succinonitrile, iodine and ammonium halide, such as hexamethyldisiloxane, hexamethoxycyclotriphosphazene , Hexamethylphosphoramide, cyclohexylbenzene, biphenyl, dimethylpyrrole, and their derivatives.
  • these additives may be selected and contained in the capsules 3 and 3A.
  • the initial additive may also be the same as the additive described above.
  • the total amount of additives released in one addition may be about 0.5 to 1.0% by weight based on the amount of the electrolyte.
  • the initial additive and the recovery additive may be the same as in the present embodiment or may be different. Even if the initial additive and the recovery additive are different, it is sufficient if the reduction of lithium ions which can move between the positive electrode and the negative electrode can be suppressed by protecting the electrode and suppressing the formation of SEI.
  • Second Embodiment differs from the first embodiment in that an addition device 4 shown in FIG. 3 is used instead of a capsule as an addition means.
  • the adding device 4 is installed, for example, on the back surface side of the lid 12 of the secondary battery 1 and adds an additive to the electrolyte solution 14 according to a change in internal pressure.
  • the addition device 4 has a cylindrical portion 41 and a large diameter portion 42 provided on one end side of the cylindrical portion 41 and having a diameter larger than that of the cylindrical portion 41. The other end side of the cylindrical portion 41 is open.
  • the cylindrical portion 41 is provided with a plurality of openings 43 along the longitudinal direction. Reservoir parts 44 communicate with the respective openings 43 respectively.
  • the storage unit 44 is cylindrical with a bottom, and the additive 45 is stored therein.
  • the cylindrical portion 41 is provided with a plug portion 46 which is fitted to the inner wall substantially in agreement with the inner diameter of the cylindrical portion 41.
  • the plug portion 46 is made of, for example, a substance such as rubber.
  • the plug portion 46 is configured to be movable in the tubular portion 41.
  • the plug portion 46 is installed on the other end side of the cylindrical portion 41 as an initial state.
  • the plug 46 is installed and fitted to the other end of the cylindrical portion 41 so that the pressure is the same as the external pressure in a state in which the large diameter portion 42 side of the plug 46 in the addition device 4 receives air. Is configured.
  • the plug 46 when the battery is deteriorated, that is, the internal pressure rises, the plug 46 is pressed by the internal pressure and gradually moves in the longitudinal direction of the cylindrical portion 41 toward one end, that is, the large diameter portion 42 side. Then, as shown in FIG. 3 (2), when the plug portion 46 moves and passes the storage portion 44 closest to the opening side of the cylindrical portion 41, the additive 45 stored in the storage portion 44 is opened. It passes through 43 and is released into the electrolyte 14. Therefore, as the internal pressure rises, the plug portion 46 moves in the cylindrical portion 41, whereby the additive 45 in each storage portion 44 is released into the electrolytic solution 14.
  • the additive 45 is discharged into the electrolyte solution 14 when the secondary battery 1 is deteriorated, that is, the VC film is removed and the increase in internal pressure exceeds a predetermined value.
  • the VC film can be formed again in the region where the VC film of the electrode is peeled, and the secondary battery is recovered. It is possible.
  • the large diameter portion 42 since the large diameter portion 42 is provided, the internal pressure change at the time of charge and discharge can be absorbed. That is, even if there is an internal pressure change at the time of charge and discharge, the detection pressure can be lowered by the air contained in the large diameter portion 42 being pressed outward. As a result, the plug 46 moves due to the change in internal pressure due to deterioration rather than the change in internal pressure due to normal charge and discharge. Since the addition device 4 is provided on the back surface side of the lid 12, the addition device 4 is unlikely to be affected by the expansion and contraction of the electrode body 13. This is because the electrode body 13 expands and contracts in the stacking direction.
  • the present embodiment differs from the second embodiment in that the plug portion 46 of the addition device 5 shown in FIG. 4 is pressed to the outside by an elastic body.
  • the addition device 5 is also provided, for example, on the back surface side of the lid 12 in the same manner as the addition device 4 (see FIG. 3), and adds an additive to the electrolyte according to the change in internal pressure.
  • the addition device 5 is provided with a spring 51, one end of which is connected to a spring seat 52 provided on the large diameter portion 42, and the other end side is connected to the plug portion 46.
  • the plug portion 46 installed near the inlet of the cylindrical portion 41 is pressed outward by the spring 51.
  • the internal pressure in the secondary battery 1 increases due to deterioration, the internal pressure is higher than the elastic force of the spring 51. As it becomes larger, the plug 46 moves inward. With such a configuration, the plug 46 can be more precisely controlled according to the internal pressure.
  • the additive 45 is discharged into the electrolyte solution 14 when the capacity of the secondary battery 1 is decreased, that is, the VC film is peeled off and the increase in internal pressure exceeds a predetermined value.
  • the VC film can be formed again in the area where the VC film of the electrode is peeled, and the secondary battery 1 is recovered. It is possible to
  • the addition means is not limited to the capsules 3 and 3A and the addition devices 4 and 5 described above.
  • the additive 45 may be added according to the deterioration state. If the separator 45 has separation means for separating the additive 45 from the electrolytic solution and the separation means is configured to be deformed according to the internal pressure, the addition is easily performed according to the change in the internal pressure without providing any measurement means etc. The agent 45 can be effectively added.
  • the shapes of the addition devices 4 and 5 are not limited to the above-described embodiments.
  • it may be a shape having no large diameter portion.
  • the thickness of the cylindrical portion 41 is not constant, and the thickness gradually decreases from the other end side (open side) to the one end side (bottom side). May be In this case, as the plug portion 46 moves to one end side, the plug portion 46 is fitted into the inner wall of the cylindrical portion 41.
  • the addition means is disposed in the electrolyte, but is not limited thereto.
  • the plug 46 can be pressed by a change in internal pressure, it is not limited to being disposed in the electrolytic solution.

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  • Manufacturing & Machinery (AREA)
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PCT/JP2012/078693 2011-11-10 2012-11-06 二次電池 WO2013069622A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201280055371.9A CN103931041B (zh) 2011-11-10 2012-11-06 二次电池
KR1020147015103A KR101571988B1 (ko) 2011-11-10 2012-11-06 이차 전지

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-246871 2011-11-10
JP2011246871A JP5800146B2 (ja) 2011-11-10 2011-11-10 リチウムイオン二次電池

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WO2013069622A1 true WO2013069622A1 (ja) 2013-05-16

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JP (1) JP5800146B2 (zh)
KR (1) KR101571988B1 (zh)
CN (1) CN103931041B (zh)
WO (1) WO2013069622A1 (zh)

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CN103682241A (zh) * 2013-12-17 2014-03-26 深圳市格瑞普电池有限公司 带无尘布的锂离子电池
CN103811711A (zh) * 2014-02-27 2014-05-21 深圳市格瑞普电池有限公司 带胶囊的锂离子电池
CN104425844A (zh) * 2013-09-09 2015-03-18 浙江万向亿能动力电池有限公司 一种通过隔离式阻燃液体提高动力电池安全性的方法
WO2015089749A1 (zh) * 2013-12-17 2015-06-25 深圳市格瑞普电池有限公司 带无尘布的锂离子电池
EP4170768A4 (en) * 2021-08-26 2023-10-18 Contemporary Amperex Technology Co., Limited BATTERY CELL, BATTERY AND ELECTRICAL DEVICE

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CN109411830A (zh) * 2018-11-02 2019-03-01 温州玖源锂电池科技发展有限公司 一种锂离子电池装置
CN111048832A (zh) * 2019-10-21 2020-04-21 江西赣锋电池科技有限公司 一种储能用磷酸铁锂长寿命电池电解液
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Publication number Priority date Publication date Assignee Title
CN104425844A (zh) * 2013-09-09 2015-03-18 浙江万向亿能动力电池有限公司 一种通过隔离式阻燃液体提高动力电池安全性的方法
CN103682241A (zh) * 2013-12-17 2014-03-26 深圳市格瑞普电池有限公司 带无尘布的锂离子电池
WO2015089749A1 (zh) * 2013-12-17 2015-06-25 深圳市格瑞普电池有限公司 带无尘布的锂离子电池
CN103811711A (zh) * 2014-02-27 2014-05-21 深圳市格瑞普电池有限公司 带胶囊的锂离子电池
EP4170768A4 (en) * 2021-08-26 2023-10-18 Contemporary Amperex Technology Co., Limited BATTERY CELL, BATTERY AND ELECTRICAL DEVICE

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JP5800146B2 (ja) 2015-10-28
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