WO2012161137A1 - リチウムイオン二次電池 - Google Patents
リチウムイオン二次電池 Download PDFInfo
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- WO2012161137A1 WO2012161137A1 PCT/JP2012/062861 JP2012062861W WO2012161137A1 WO 2012161137 A1 WO2012161137 A1 WO 2012161137A1 JP 2012062861 W JP2012062861 W JP 2012062861W WO 2012161137 A1 WO2012161137 A1 WO 2012161137A1
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- Prior art keywords
- battery
- ion secondary
- lithium ion
- secondary battery
- smoke
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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
- H01M10/42—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
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
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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
- H01M10/058—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
- H01M10/34—Gastight accumulators
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/0569—Liquid materials characterised by the solvents
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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
- H01M10/42—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
- H01M10/523—Removing gases inside the secondary cell, e.g. by absorption by recombination on a catalytic material
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
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- 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
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- 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 lithium ion secondary battery, and more particularly to a lithium ion secondary battery having a function of suppressing smoke generation.
- a lithium ion secondary battery As a secondary battery installed in a wind power generation system or a solar power generation system using natural energy, or a secondary battery installed in a building, a lithium ion secondary battery (hereinafter referred to as a high capacity and high energy density) is used. Lithium batteries) are known to have desirable performance.
- Patent Document 1 discloses a module having a countermeasure when a gas is discharged from a battery due to a battery abnormality in a power module for an electric vehicle.
- An object of the present invention is to prevent the leakage of smoke generated from the inside of the battery and to enable safer use.
- An electrode group in which a positive electrode and a negative electrode are manufactured via a separator is housed in a battery can together with an electrolytic solution, and the battery can is a metal sealed container having a lid, which absorbs smoke and gas components generated from the inside of the battery can And a lithium ion secondary battery provided with a portion that performs at least one of absorption inside the battery can.
- a lithium ion secondary battery in which at least one of adsorption and absorption of smoke and gas components generated from the inside of the battery can is directly connected to a cleavage valve provided in the lid.
- the battery can is cylindrical, has a pole column that electrically connects the electrode group and the terminal, and the part that performs at least one of adsorption and absorption of smoke and gas components generated from the inside of the battery can,
- a lithium ion secondary battery having a space for penetrating a pole column near the center in a substantially circular cross-sectional direction of a cylindrical battery can.
- the arrangement of the inlet and outlet of the flow path of the smoke or gas component in the portion that performs at least one of adsorption and absorption of smoke and gas components generated from the inside of the battery can is 90% with respect to the center of the battery can.
- a lithium ion secondary battery in which a portion that performs at least one of adsorption and absorption of smoke and gas components generated from the inside of the battery can is a heat-resistant fluorine-based polymer compound in a temperature range of 250 ° C. or less.
- a lithium ion secondary battery in which the fluorine polymer compound is a non-woven fabric using polytetrafluoroethylene or polyhexafluoropropylene.
- a lithium ion secondary battery in which the part that performs at least one of adsorption and absorption of smoke and gas components generated from the inside of the battery can is an inorganic compound having heat resistance in a temperature range of 250 ° C. or lower.
- the inorganic compound is any one of porous alumina oxide, silica gel, and zeolite.
- the positive electrode uses lithium transition metal composite oxide as the positive electrode active material
- the negative electrode uses carbon material / silicon / tin as the negative electrode active material
- the electrolyte dissolves the lithium salt in a carbonate-based organic solvent.
- the power supply made up of a lithium battery unit battery generates heat due to the internal resistance of the battery itself during charge and discharge during use.
- a structure in which gas is convected for cooling is provided, and it becomes difficult to absorb and adsorb smoke components from the lithium battery in an emergency. Therefore, in this invention, it becomes possible not to depend on the shape and cooling structure of the power supply by a module by providing the part which absorbs and adsorb
- FIG. 5 is a cross-sectional view taken along a line A ... B in FIG.
- FIG. 4 of a rectangular battery can having a smoke substance adsorbing part of a lithium battery according to an embodiment to which the present invention is applicable. It is a block diagram which shows the adsorption
- a power supply system for use in the power network requires a large-capacity power storage power supply. At that time, the capacity is at least several tens of kWh, and a large-scale one such as a factory requires several MWh. Clearly, the lithium battery which comprises the power supply is not comprised only with one single battery (single battery), but a plurality of single batteries are integrated and a power supply is comprised as a module.
- a power supply of several kWh to several tens of kWh is configured by combining several tens of AA cells having a capacity 100 to 1000 times larger than a lithium battery used for a notebook computer or a mobile phone into a module. It becomes possible. By combining several tens of such modules, a power supply of several MWh can be configured.
- the vaporized carbonate solvent used in the electrolyte hydrogen, methane, ethane, ethylene, carbon dioxide produced by the reaction between the positive and negative electrode active materials and the electrolyte It is done.
- a preferred material for the vaporizing component is a carbon material such as activated carbon.
- a carbon material such as activated carbon.
- preferred materials include fiber materials that are heat-resistant fluoropolymers, fibrous glass, and the like.
- FIG. 1 shows a schematic view of a cross section of a lithium battery housed in a battery can.
- the positive electrode, the separator, the negative electrode, and the separator are arranged so as to overlap each other, and the electrode group 15 wound around the central axis is accommodated, and the gap fills the gap.
- the current collectors of the positive electrode and the negative electrode are connected to the pole columns, which are connected to the terminals of the positive electrode and the negative electrode, respectively.
- an adsorption portion for adsorbing smoke generating substances generated during abuse is disposed between the winding group and the positive electrode terminal, and the positive electrode pole column passes through the center.
- each of the positive and negative current collectors is connected to the positive and negative terminals, respectively, and is insulated and fixed from the battery lid. And there is a gas discharge valve for releasing the gas generated at the time of abuse on the battery lid. Further, an adsorbing portion for adsorbing a smoke generating substance generated during abuse is disposed between the wound group or the battery lid, which is alternately laminated with the positive electrode, the separator, the negative electrode, and the separator.
- the present invention will be described with reference to an example in which the present invention is applied as a storage battery for stabilizing the power output of industrial power generation, mainly wind power generation, and power generation by solar cells.
- lithium batteries positive batteries, negative electrodes, separators, and electrolytes
- metallic containers metallic containers
- laminated batteries that use aluminum laminate with a film on an aluminum foil as an exterior material.
- laminate type battery it is considered that there is a limit to the enlargement of the lithium battery due to the strength of the aluminum laminate. In this invention, it limits to the lithium battery of the battery can accommodated in the metal container.
- the types of these generated gases include methane, ethane, ethylene, hydrogen gas, etc. as decomposition products of the carbonate solution of the vaporized electrolyte, positive electrode, and negative electrode, and decomposition products of lithium salts.
- Examples thereof include a fluorophosphate compound (PF 3 O).
- the fuming substance may be a vaporized organic solvent mist substance or a PF 3 O particulate substance.
- a smoke generation phenomenon occurs at 120 ° C. or more when the lithium battery is overcharged or an internal short circuit, and thus heat resistance higher than this temperature is required. Therefore, as the material for removing the smoke generating material, a fluorine-based polymer compound that is a fibrous filter is desirable, and a nonwoven fabric using polytetrafluoroethylene or polyhexafluoropropylene is particularly desirable. Since the gas containing the smoke generating material is removed when passing through the filter, the removal effect is enhanced if the filter disposed in the smoke generating adsorption portion is a nonwoven fabric.
- an inorganic compound as a material for removing smoke, and it is more easily adsorbed if it has an affinity with an organic substance such as a carbonate solvent, which is the main component of the electrolytic solution.
- an organic substance such as a carbonate solvent, which is the main component of the electrolytic solution.
- SiO 2 silica gel
- zeolite can be used, and the shape may be anything such as powder, pellets, beads, and plates.
- a bead shape is desirable.
- the absorbent portion is filled with these adsorbents.
- a glass filter with high heat resistance is provided at an inlet portion where the smoke generating material flows and an outlet portion where the smoke generating material is discharged so that these adsorbents do not leak.
- the adsorbing portion of the fuming material is often cylindrical and has a donut-shaped structure in the center so that the positive pole can be penetrated. It contains a removal material, and the boundary between the battery winding group and the battery lid is partitioned by a lid provided with a cleavage valve that cleaves at a predetermined pressure.
- a lid provided with a cleavage valve that cleaves at a predetermined pressure.
- the cylindrical battery has a cylindrical shape in which the adsorbed portion of the smoke generating material is cut out at the center.
- the flow path of the smoke generating substance adsorption portion is less than 90 ° with respect to the center of the cylindrical shape, the angle defined by the line connecting the inlet and the outlet of the flow path. If it exists, the fuming substance introduced into the adsorption part from the inlet will be discharged from the outlet without passing through the entire adsorbed substance, and the adsorption effect will be reduced. Therefore, the angle defined by the center of the battery can and the inlet and outlet is preferably 90 ° or more and 180 ° or less, and more preferably 120 ° to 180 °.
- the number of the inlet and the outlet of the adsorption portion shown in the embodiment is one, but the number of inlets is two to increase the adsorption effect. It is also effective to have one exit.
- the shape in a rectangular battery, is a rectangular parallelepiped, and has an inlet through which smoke material flows in at the lower part and an outlet through which it is discharged from the upper part or a side surface.
- a connection structure is preferable. As a path through which the smoke generating material flows, it is desirable that the inlet and outlet portions do not overlap when viewed from above.
- the adsorption portion is 15 to 40% of the thickness of the battery can in a cylindrical battery, and 10% to 10% by volume of the battery can in a square battery. A volume of 35% is desirable.
- Either a cylindrical battery or a square battery has a structure in which the battery lid 17 is combined with the battery can 16.
- the electrode group 15 side (temporarily lower) in the battery can 16 is a source of fuming material. Therefore, an inlet of the adsorption portion is provided on the lower side, and the battery lid 17 side (temporarily upper) is the fuming material. Therefore, a structure in which an outlet of the adsorption portion is provided on the upper side is conceivable. However, if a discharge port for the smoke generating material is provided in a part of the electrode can 16, the outlet of the smoke generating material may be provided on the side instead of the upper side.
- the positive electrode used in the lithium battery of the present invention is formed by applying a positive electrode mixture composed of a positive electrode active material, a conductive agent and a binder on both sides of an aluminum foil, followed by drying and pressing.
- the positive electrode active material one represented by the chemical formula LiMO 2 (M is at least one transition metal), spinel manganese, or the like can be used.
- Mn, Ni, Co, etc. in the positive electrode active material such as lithium manganate, lithium nickelate, and lithium cobaltate can be used by being replaced with one or more transition metals.
- a part of the transition metal can be replaced with a metal element such as Mg or Al.
- the conductive agent may be a known conductive agent, for example, a carbon-based conductive agent such as graphite, acetylene black, carbon black, carbon fiber, and is not particularly limited.
- binder known binders such as polyvinylidene fluoride and fluororubber may be used, and are not particularly limited.
- a preferred binder in the present invention is, for example, polyvinylidene fluoride.
- solvent various known solvents can be appropriately selected and used.
- an organic solvent such as N-methyl-2-pyrrolidone is preferably used.
- the mixing ratio of the positive electrode active material, the conductive agent, and the binder in the positive electrode mixture is not particularly limited. For example, when the positive electrode active material is 1, the weight ratio is 1: 0.05 to 0.20: 0.02. ⁇ 0.10 is preferred.
- the negative electrode used in the lithium battery of the present invention is formed by applying a negative electrode mixture composed of a negative electrode active material and a binder to both sides of a copper foil, followed by drying and pressing.
- a negative electrode mixture composed of a negative electrode active material and a binder
- Preferred in the present invention is a carbon-based material such as graphite or amorphous carbon.
- a binder the thing similar to the said positive electrode is used, for example, and it does not specifically limit.
- Preferred in the present invention is, for example, polyvinylidene fluoride.
- a preferred solvent is an organic solvent such as N-methyl-2-pyrrolidone.
- the mixing ratio of the negative electrode active material and the binder in the negative electrode mixture is not particularly limited. For example, when the negative electrode active material is 1, the weight ratio is 1: 0.05 to 0.20.
- non-aqueous electrolyte used in the lithium battery of the present invention a known one may be used and is not particularly limited.
- non-aqueous solvents include propylene carbonate, ethylene carbonate, butylene carbonate, vinylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, tetrahydrofuran, 1,2-diethoxyethane, and ionic liquid.
- Nonaqueous electrolyte can be prepared by dissolving one or more lithium salts selected from 2 CF 2 CF 3 ) 2 and the like.
- separators a polyolefin-based porous membrane is generally used, and a composite membrane of polyethylene and polypropylene is used as the material. Since the separator is required to have heat resistance, ceramic composite separators in which ceramics such as alumina are coated on the surface, and ceramic composite separators using them as a part of the constituent material of the porous film have been developed.
- a general flame retardant may be used, and the flame retardant used in the present invention is not particularly limited.
- a phosphoric ester, a phosphazene, a compound containing a fluorinated alkyl group, a flame retardant such as an ionic liquid, or a mixture of two or more of these may be used, and the mixing ratio is also limited. It is not something.
- Each of the produced positive and negative electrodes was roll-formed with a press and then vacuum-dried at 150 ° C. for 5 hours.
- a polyethylene (PE) porous polymer resin film (thickness 20 ⁇ m) as a separator, the positive electrode and the negative electrode are stacked so as to be insulated through the separator, and then wound, and the obtained electrode group 15 is formed into a cylinder.
- the battery can 16 was inserted.
- the obtained negative electrode current collector 14 was collected on the negative electrode pole column 13 and ultrasonically welded, passed through the battery lid 17 to the negative electrode pole column 13 and fixed with the negative electrode hexagon nut 10 serving as a negative electrode terminal.
- the aluminum positive electrode current collector 12 was ultrasonically welded to the positive electrode column 11
- the aluminum positive electrode column 11 was passed through the battery lid 17 and fixed with the positive electrode hexagon nut 9 serving as the positive electrode terminal.
- an adsorption portion 21 for adsorbing a smoke generating material is provided so as to fill a space between the positive electrode pole 11 and the battery can 16.
- a filter made of a fluorine-based polymer compound was used as the adsorbing substance in the adsorbing portion.
- Each of the positive battery lid 17 and the negative battery lid 17 is sealed by laser welding with the battery can 16 to be sealed.
- Example 2 A battery was produced in the same manner as in Example 1, and a cylindrical lithium battery was obtained by using silica gel as the adsorbing material of the adsorbing portion 21.
- Example 3 When the positive electrode and the negative electrode are produced in the same manner as in Example 1 and the positive electrode and the negative electrode are wound through a separator, the cross section of the electrode group 15 called flat winding is made elliptical, The battery can 26 was inserted. The positive electrode current collector and the negative electrode current collector in the electrode are connected to the positive electrode pole column 11 and the negative electrode pole column 13, respectively, and after passing these electrode columns through the pole column cavity of the adsorption portion 21, Insulate and fix.
- the battery lid 17 and the battery can 16 are sealed by laser welding so as to be sealed.
- a prismatic lithium battery was obtained.
- Example 4 A prismatic battery was produced in the same manner as in Example 3, and a prismatic lithium battery was obtained using silica gel as the adsorbing material for the adsorption portion 21.
- Example 5 In the same manner as in Example 1, a positive electrode and a negative electrode were produced, and the positive electrode and the negative electrode were laminated via a separator to produce an electrode group 15.
- a terminal taken out from the electrode was connected to the battery lid 17, and a rectangular shape was obtained.
- the battery can 26 was inserted.
- an adsorbing portion 21 for adsorbing a smoke generating substance is disposed between the battery lid 17 and the stacked electrodes.
- the suction port of the adsorption portion 21 is arranged so as to overlap the cleavage valve 18 of the battery lid 17.
- a filter made of a fluorine-based polymer compound was used as the adsorbing material for the adsorbing portion 21.
- the battery lid 17 and the battery can 16 are sealed by laser welding so as to be sealed.
- a laminated prismatic lithium battery was obtained.
- Example 6 A prismatic battery was produced in the same manner as in Example 5, and a laminated prismatic lithium battery was obtained using silica gel as the adsorbing substance for the adsorption portion 21.
- Example 1 A cylindrical lithium battery was obtained in the same manner as in Example 1 except for the adsorbing portion 21 for adsorbing the fuming substance filling the space between the positive electrode pole 11 and the battery can 16.
- Comparative Example 2 A square lithium battery was obtained in the same manner as in Example 3 except for the adsorbing portion 21 for adsorbing the fuming substance so as to fill between the positive electrode pole 11 and the square battery can 26.
- Comparative Example 3 A laminated prismatic lithium battery was obtained in the same manner as in Example 5 except for the adsorbing portion 21 for adsorbing the smoke generating material so as to fill the space between the positive electrode pole 11 and the prismatic battery can 26.
- the batteries of the above Examples and Comparative Examples were charged and discharged at a charge end voltage of 4.2 V, a discharge end voltage of 3.0 V, and a charge / discharge rate of 1 C (1 hour rate), and the battery capacity was confirmed.
- the overcharge test was performed under test conditions for charging a discharged battery with an amount of electricity 2.5 times the battery capacity.
- the nail penetration test was performed under test conditions in which a nail having a diameter of 5 mm was internally short-circuited by being inserted into the battery. The results of examining the behavior of the battery at that time are shown in Table 1.
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Abstract
Description
(実施例1)
正極活物質にはLiMn2O4を用い、正極活物質、導電剤の黒鉛、結着剤のポリフッ化ビニリデンを85:10:5の重量比で混練機を用いて30分間混練し、正極合剤を得た。正極合剤を集電体である厚さ30μmのアルミニウム箔の両面に塗布した。一方、負極活物質には黒鉛材を用い、結着剤にはポリフッ化ビニリデンを用いて、負極活物質:結着剤=90:10の重量比で混練した。得られた負極合剤を厚さ20μmの銅箔の両面に塗布した。作製した正負電極は、いずれもプレス機で圧延成型した後、150℃で5時間真空乾燥した。ポリエチレン(PE)の多孔性高分子樹脂膜(厚さ20μm)をセパレータに用いて、正極と負極とをそれぞれセパレータを介して絶縁するように重ねた後に捲回し、得られた電極群15を円筒状の電池缶16に挿入した。また得られた負極集電体14は負極極柱13に集めて超音波溶接し、負極極柱13に電池蓋17を通して、負極端子となる負極六角ナット10で固定した。一方、アルミニウムの正極集電体12を正極極柱11に超音波溶接した後、アルミニウムの正極極柱11を電池蓋17に通して、正極端子となる正極六角ナット9で固定した。
(実施例2)
実施例1と同様に電池を作製し、吸着部分21の吸着物質としてシリカゲルを用いて、円筒形リチウム電池を得た。
(実施例3)
実施例1と同様に正極、負極を作製して、正極、負極とをセパレータを介して捲回する際に、扁平捲回と呼ばれる電極群15の断面が楕円形になるようにして、角型の電池缶26に挿入した。電極にある正極集電体、負極集電体をそれぞれ正極極柱11、負極極柱13と接続して、吸着部分21の極柱用空洞にこれらの極柱を通した後に、電池蓋17に絶縁して固定する。
(実施例4)
実施例3と同様に角型電池を作製して、吸着部分21の吸着物質としてシリカゲルを用いて、角型リチウム電池を得た。
(実施例5)
実施例1と同様に正極、負極を作製して、正極、負極とをセパレータを介して積層して電極群15を作製し、電極から取り出した端子を電池蓋17に接続して、角型の電池缶26に挿入した。電池蓋17と積層した電極との間に、発煙物質を吸着させるための吸着部分21を配置する。この吸着部分21の排出口を電池蓋17の開裂弁18と重なるように配置する。吸着部分21の吸着物質には、フッ素系高分子化合物によるフィルターを用いた。
(実施例6)
実施例5と同様に角型電池を作製して、吸着部分21の吸着物質としてシリカゲルを用いて、積層角型リチウム電池を得た。
(比較例1)
正極極柱11と電池缶16との間を埋めている発煙物質を吸着させるための吸着部分21を除き、その他は実施例1と同様に円筒形リチウム電池を得た。
(比較例2)
正極極柱11と角型電池缶26との間を埋めるように、発煙物質を吸着させるための吸着部分21を除き、その他は実施例3と同様に角型リチウム電池を得た。
(比較例3)
正極極柱11と角型電池缶26との間を埋めるように、発煙物質を吸着させるための吸着部分21を除き、その他は実施例5と同様に積層角型リチウム電池を得た。
Claims (9)
- 正極及び負極がセパレータを介して作製された電極群を電解液と共に電池缶に収納してなるリチウムイオン二次電池であって、
前記電池缶が蓋を有する金属製の密閉容器であり、
前記電池缶内部から発生する煙や気体成分の吸着及び吸収の少なくともいずれかを行う
部分を前記電池缶内部に備えることを特徴とするリチウムイオン二次電池。 - 前記電池缶内部から発生する煙や気体成分の吸着及び吸収の少なくともいずれかを行う
部分が、前記蓋に備えられる開裂弁に直結されていることを特徴とする請求項1記載のリチウムイオン二次電池。 - 前記電池缶が円筒形であり、
前記電極群と端子とを電気的に接続する極柱を有し、
前記電池缶内部から発生する煙や気体成分の吸着及び吸収の少なくともいずれかを行う部分が、前記円筒形電池缶の略円形断面方向における中央付近に、前記極柱を貫通させるための空間を有していることを特徴とする請求項2記載のリチウムイオン二次電池。 - 前記電池缶内部から発生する煙や気体成分の吸着及び吸収の少なくともいずれかを行う部分における、前記煙や気体成分の流路の入口及び出口の配置が、前記電池缶の中心に対して、90°乃至180°の角度を有する位置であることを特徴とする請求項3記載のリチウムイオン二次電池。
- 前記電池缶内部から発生する煙や気体成分の吸着及び吸収の少なくともいずれかを行う部分が、250℃以下の温度領域において、耐熱性を有するフッ素系高分子化合物であることを特徴とする請求項1乃至請求項3のいずれかに記載のリチウムイオン二次電池。
- 前記フッ素系高分子化合物が、ポリテトラフルオロエチレンまたはポリヘキサフルオロプロピレンを用いた不織布であることを特徴とする請求項5記載のリチウムイオン二次電池。
- 前記電池缶内部から発生する煙や気体成分の吸着及び吸収の少なくともいずれかを行う部分が、250℃以下の温度領域において、耐熱性を有する無機化合物であることを特徴とする請求項1乃至請求項3のいずれかに記載のリチウムイオン二次電池。
- 前記無機化合物が、多孔質体の酸化アルミナ、シリカゲル、ゼオライトのいずれかであることを特徴とする請求項7記載のリチウムイオン二次電池。
- 前記正極が、リチウム遷移金属複合酸化物を正極活物質として用い、
前記負極が、炭素材料・シリコン・スズを負極活物質として用い、
前記電解液が、カーボネート系の有機溶媒にリチウム塩を溶解して用いた、
ことを特徴とする請求項1ないし請求項8記載のいずれかに記載のリチウムイオン二次電池。
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JP2013516354A JP5574045B2 (ja) | 2011-05-25 | 2012-05-18 | リチウムイオン二次電池 |
US13/885,418 US20130236750A1 (en) | 2011-05-25 | 2012-05-18 | Lithium ion battery |
EP12789042.4A EP2717376A4 (en) | 2011-05-25 | 2012-05-18 | LITHIUM-ION SECONDARY BATTERY |
KR1020137012698A KR20140023255A (ko) | 2011-05-25 | 2012-05-18 | 리튬 이온 2차 전지 |
CN201280003680.1A CN103222103B (zh) | 2011-05-25 | 2012-05-18 | 锂离子二次电池 |
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JP2011116494 | 2011-05-25 | ||
JP2011-116494 | 2011-05-25 |
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WO2012161137A1 true WO2012161137A1 (ja) | 2012-11-29 |
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PCT/JP2012/062861 WO2012161137A1 (ja) | 2011-05-25 | 2012-05-18 | リチウムイオン二次電池 |
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US (1) | US20130236750A1 (ja) |
EP (1) | EP2717376A4 (ja) |
JP (1) | JP5574045B2 (ja) |
KR (1) | KR20140023255A (ja) |
CN (1) | CN103222103B (ja) |
WO (1) | WO2012161137A1 (ja) |
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JP2023508217A (ja) * | 2020-11-10 | 2023-03-01 | エルジー エナジー ソリューション リミテッド | ガス捕集用部材を含む二次電池 |
EP4131611A4 (en) * | 2021-05-28 | 2024-07-10 | Contemporary Amperex Technology Co Ltd | GAS ADSORPTION DEVICE, END CAP ASSEMBLY, BATTERY CELL, BATTERY AND ELECTRONIC DEVICE |
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US10707526B2 (en) | 2015-03-27 | 2020-07-07 | New Dominion Enterprises Inc. | All-inorganic solvents for electrolytes |
CN105355969A (zh) * | 2015-12-04 | 2016-02-24 | 深圳市沃特玛电池有限公司 | 一种锂离子电池及其制造方法 |
US10707531B1 (en) | 2016-09-27 | 2020-07-07 | New Dominion Enterprises Inc. | All-inorganic solvents for electrolytes |
CN106505208A (zh) * | 2016-12-26 | 2017-03-15 | 宁波市吉赛尔电子有限公司 | 一种碱性电池集电体及使用该集电体的碱性电池 |
JPWO2020110589A1 (ja) * | 2018-11-30 | 2021-10-14 | パナソニックIpマネジメント株式会社 | 非水電解質二次電池用負極及び非水電解質二次電池 |
CN111356313B (zh) * | 2020-03-13 | 2021-05-11 | Oppo广东移动通信有限公司 | 壳体组件和电子设备 |
CN112615043A (zh) * | 2020-08-26 | 2021-04-06 | 清陶(昆山)能源发展有限公司 | 一种全固态锂离子电池 |
CN113540600B (zh) * | 2021-06-18 | 2022-09-06 | 陕西奥林波斯电力能源有限责任公司 | 一种大容量电池的安全结构 |
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- 2012-05-18 EP EP12789042.4A patent/EP2717376A4/en not_active Withdrawn
- 2012-05-18 US US13/885,418 patent/US20130236750A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
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JPWO2012161137A1 (ja) | 2014-07-31 |
US20130236750A1 (en) | 2013-09-12 |
EP2717376A1 (en) | 2014-04-09 |
KR20140023255A (ko) | 2014-02-26 |
EP2717376A4 (en) | 2014-12-10 |
CN103222103B (zh) | 2016-08-10 |
JP5574045B2 (ja) | 2014-08-20 |
CN103222103A (zh) | 2013-07-24 |
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