WO2013051273A1 - 蓄電装置とそれに用いられる絶縁組成物 - Google Patents
蓄電装置とそれに用いられる絶縁組成物 Download PDFInfo
- Publication number
- WO2013051273A1 WO2013051273A1 PCT/JP2012/006383 JP2012006383W WO2013051273A1 WO 2013051273 A1 WO2013051273 A1 WO 2013051273A1 JP 2012006383 W JP2012006383 W JP 2012006383W WO 2013051273 A1 WO2013051273 A1 WO 2013051273A1
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- WO
- WIPO (PCT)
- Prior art keywords
- power storage
- storage device
- case
- additive
- rubber
- Prior art date
Links
- 238000003860 storage Methods 0.000 title claims abstract description 92
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- 230000000996 additive effect Effects 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 27
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- 230000035699 permeability Effects 0.000 description 16
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- 239000002184 metal Substances 0.000 description 14
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- 229910052782 aluminium Inorganic materials 0.000 description 4
- 150000001768 cations Chemical class 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
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- 229910052744 lithium Inorganic materials 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 150000003141 primary amines Chemical class 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- GEFNFZTUZOXURZ-UHFFFAOYSA-O 5-ethyl-2,3-dimethyl-1H-imidazol-3-ium Chemical compound C(C)C=1N=C([NH+](C1)C)C GEFNFZTUZOXURZ-UHFFFAOYSA-O 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
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- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
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- YOMFVLRTMZWACQ-UHFFFAOYSA-N ethyltrimethylammonium Chemical compound CC[N+](C)(C)C YOMFVLRTMZWACQ-UHFFFAOYSA-N 0.000 description 1
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- 229910052748 manganese Inorganic materials 0.000 description 1
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- 229910052763 palladium Inorganic materials 0.000 description 1
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- 150000002978 peroxides Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- 238000003466 welding Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/80—Gaskets; Sealings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/14—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors
- H01G11/20—Reformation or processes for removal of impurities, e.g. scavenging
-
- 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
- Y02E60/13—Energy storage using capacitors
-
- 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 power storage device used for various electronic devices and in-vehicle use, and an insulating composition applied to a sealing member thereof.
- FIG. 5 is a cross-sectional view of an electric double layer capacitor which is an example of a conventional power storage device.
- the electric double layer capacitor includes a capacitor element 101, an electrolytic solution (not shown), a metal case 102, a sealing rubber 103, and a pair of lead terminals 104A and 104B.
- the capacitor element 101 has a pair of positive and negative electrodes.
- the electrolytic solution is impregnated in the capacitor element 101.
- Case 102 contains capacitor element 101 and an electrolytic solution.
- the sealing rubber 103 is provided with a through hole and seals the opening of the case 102.
- the positive terminal of the capacitor element 101 is electrically connected to the lead terminal 104A, and the negative electrode is electrically connected to the lead terminal 104B.
- the lead terminals 104 ⁇ / b> A and 104 ⁇ / b> B are drawn out through the through hole of the sealing rubber 103.
- Silicone rubber, ethylene propylene rubber, butyl rubber, peroxide vulcanized rubber, or the like is used as the material of the sealing rubber 103 (see, for example, Patent Document 1).
- the present invention is a power storage device in which a gas generated inside is preferentially exhausted to the outside as compared with moisture entering the inside, and rupture due to an increase in internal pressure is suppressed.
- the power storage device according to the present invention includes a power storage element, an electrolytic solution, a case, and a sealing member.
- the power storage element includes a positive electrode, a negative electrode facing the positive electrode, and a separator interposed between the positive electrode and the negative electrode.
- the electrolytic solution is impregnated in the electric storage element.
- the case contains a power storage element and an electrolytic solution.
- the sealing member seals the opening provided in the case.
- At least a part of the sealing member is composed of an insulating composition including a base material capable of gas permeation and a primary amine compound as an additive.
- a gas such as CO 2
- gas permeability in the rubber body can be improved. For this reason, the gas generated in the power storage device can be preferentially exhausted to improve the reliability against the pressure increase in the case.
- FIG. 1A is a front view of a power storage device according to an embodiment of the present invention.
- 1B is a partial cross-sectional view of the vicinity of the terminal plate of the power storage device shown in FIG. 1A.
- FIG. 2 is an exploded perspective view of a power storage element of the power storage device shown in FIG. 1A.
- FIG. 3 is a graph showing the relationship between the amount of additive added to the rubber body used in the power storage device and the CO 2 selective permeability improvement rate in the embodiment of the present invention.
- FIG. 4A is a plan view of another power storage device according to the embodiment of the present invention.
- 4B is a front cross-sectional view of the power storage device shown in FIG. 4A.
- FIG. 5 is a front sectional view showing a conventional power storage device.
- the opening of the case 102 is sealed with a sealing rubber 103.
- the sealing rubber 103 has gas permeability for exhausting the gas generated when the electrolytic solution is decomposed from the inside of the case 102 to the outside in addition to airtightness for preventing leakage of the electrolytic solution. Such characteristics are required.
- it is required to charge and discharge the power storage device under more severe conditions such as high withstand voltage and high temperature, it is assumed that more gas is generated. Therefore, it is necessary for the power storage device to further improve characteristics in gas permeability.
- FIG. 1A is a front view of power storage device 31 in the present embodiment
- FIG. 1B is a partial cross-sectional view of the vicinity of the terminal plate of power storage device 31
- FIG. 2 is an exploded perspective view of power storage element 1 of power storage device 31 shown in FIG. 1A.
- the power storage device 31 includes a power storage element 1, a bottomed cylindrical metal case 2, an intermediate body 6 that is a metal plate, a metal terminal plate 3, an insulating member 5, a rubber body 4, and a fixed body. Member 7.
- the electricity storage device 1 is configured by winding a positive electrode 51, a negative electrode 52, and a separator 53 interposed therebetween.
- the positive electrode 51 includes a current collector 51A and a positive electrode material layer 51B.
- the positive electrode material layer 51B is formed on both surfaces of the current collector 51A so that a part of the current collector 51A is exposed.
- the negative electrode 52 includes a current collector 52A and a negative electrode material layer 52B.
- the negative electrode material layer 52B is formed on both surfaces of the current collector 52A so that a part of the current collector 52A is exposed.
- the exposed part of the current collector 51A becomes the positive electrode end 1A
- the exposed part of the current collector 52A becomes the negative electrode end 1B. In this way, the positive electrode 51 and the negative electrode 52 are drawn from both ends opposite to each other in the winding axis direction of the power storage element 1.
- Case 2 contains a storage element 1 together with an electrolyte (not shown).
- the intermediate body 6 is joined to the positive electrode end 1A.
- Terminal plate 3 is joined to the outer surface of intermediate body 6 joined to positive electrode end 1 ⁇ / b> A and is electrically connected to power storage device 1.
- the terminal board 3 is used as an electrical lead portion located in the opening of the case 2.
- the insulating member 5 is interposed between the side surface of the terminal plate 3 and the inner peripheral surface of the case 2.
- the rubber body 4 closes the vertical through hole 3 ⁇ / b> A provided in the terminal plate 3.
- the fixing member 7 fixes the rubber body 4 from the upper surface.
- the inner bottom surface of the case 2 is electrically connected to the negative electrode end 1B of the electricity storage element 1.
- the power storage element 1 and the inner bottom surface of the case 2 may be directly joined, or a metal plate similar to the intermediate body 6 may be interposed and joined.
- the current collectors 51A and 52A are made of conductive foil. As described above, in the electricity storage device 1, the positive electrode material layer 51B and the negative electrode material layer are provided so that the exposed portions of the current collectors 51A and 52A on which the positive electrode material layer 51B and the negative electrode material layer 52B are not formed are provided only on one end side. 52B is formed. Then, the exposed portions of the current collectors 51A and 52A are made to face each other so as to protrude in opposite directions. The positive electrode 51, the negative electrode 52, and the separator 53 are wound with the separator 53 interposed between the positive electrode 51 and the negative electrode 52 facing each other. In this way, the electricity storage element 1 is formed.
- the electricity storage element 1 has a winding shape, and the current collector exposed portion of each electrode protrudes in the opposite direction with respect to the winding axis.
- the materials of the current collectors 51A and 52A include Al, Ti, Zr, Hf, Nb, Ta, Cr, Mo, W, Mn, Si, Fe, Ag, Pd, Ni, Cu, Pt, Au, and alloys thereof. Can be used.
- the positive electrode material and the negative electrode material for example, a porous carbon material such as activated carbon can be used.
- the storage element 1 is charged and discharged by adsorbing and desorbing cations and anions on the surface of the carbon material.
- the positive electrode material layer 51B and the negative electrode material layer 52B may be configured to include a binder, a conductive auxiliary agent, and the like.
- the separator 53 is made of an insulating sheet material such as paper or resin.
- the separator 53 is not particularly limited as long as it is a sheet-like insulating material, but is preferably paper such as cellulose, or a resin film such as polypropylene, polyethylene, or aramid.
- Intermediate 6 is a metal plate joined to positive electrode end 1A by welding or the like.
- a through hole 6 ⁇ / b> A is preferably formed in the vicinity of the center of the winding axis of the power storage element 1 in order to improve the impregnation property of the electrolytic solution into the power storage element 1.
- the terminal board 3 is a metal member joined to the outer surface of the intermediate body 6 joined to the electricity storage element 1.
- the terminal plate 3 has a function of a sealing plate that seals most of the opening of the case 2. Further, it has a function of electrically drawing out the positive electrode 51 which is one electrode of the power storage element 1.
- a flange portion 3 ⁇ / b> B is formed in the vicinity of the joint interface between the terminal plate 3 and the power storage element 1.
- Case 2 is made of metal and has a bottomed cylindrical shape.
- the case 2 is preferably made of the same metal as the current collector 52A in consideration of joining with the current collector 52A.
- the material of the intermediate body 6 and the terminal board 3 is made of the same metal as the current collector 51A in consideration of joining with the current collector 51A.
- the metal used for the case 2 may be a metal different from other constituent members. Specific examples include aluminum, iron, stainless steel, nickel, and copper.
- the rubber body 4 is provided at a location where a through hole 3A that connects the inside and the outside of the case 2 provided on the terminal board 3 is formed. And the rubber body 4 is comprised with the insulating composition containing the rubber material which is a base material, and the additive which is a primary amine compound.
- the fixing member 7 presses and fixes the rubber body 4 from the upper surface in the through hole 3A.
- the fixing member 7 is preferably made of iron, stainless steel, copper, nickel, aluminum or the like.
- the insulating member 5 is provided in a place where the side surface of the terminal plate 3 and the inner surface of the case 2 face each other, and prevents the case 2 and the terminal plate 3 from being short-circuited.
- a rubber material such as butyl rubber or ethylene propylene rubber is preferable because of excellent insulation and workability.
- the insulating member 5 is locked by the flange portion 3 ⁇ / b> B of the terminal plate 3, and the drawn portion 2 ⁇ / b> A is formed from the outside of the case 2 toward the outer surface of the terminal plate 3, thereby strongly strengthening the vicinity of the insulating member 5. Is sealed. Further, a curling portion 2B bent inside the case 2 is provided at the end of the opening of the case 2. Further, the vicinity of the insulating member 5 can be firmly sealed by the curling portion 2B.
- the rubber body 4 seals a part of the opening of the case 2 together with the terminal plate 3 by disposing the rubber body 4 so as to close the through hole 3A.
- the rubber body 4 is a part of a sealing member and also has a function of transmitting gas generated inside the case 2. That is, in the configuration shown in FIG. 1B, the terminal plate 3, the rubber body 4, the fixing member 7, and the insulating member 5 constitute a sealing member that seals the opening of the case 2. And at least one part of the sealing member is comprised with the insulating composition containing the base material which can permeate
- the additive contained in the rubber body 4 it is preferable to use a copolymer of acrylic acid represented by the following chemical formula (1) containing a primary amine.
- the rubber material is made of at least one of silicone rubber, butyl rubber, and ethylene propylene rubber.
- R 1 , R 2 , and R 3 are preferably hydrogen or an alkyl group, but are not particularly limited. X, y, n, and m are positive numbers)
- the rubber body 4 can be produced by adding the above-mentioned additives in the process of producing a general rubber material. Specifically, first, a rubber material and various fillers are kneaded using a kneader. The rubber sheet thus obtained, the additive and the crosslinking agent are kneaded using a kneader. Thereafter, the obtained kneaded product is crosslinked. In this way, an insulating composition that is a material of the rubber body 4 can be prepared. In addition, in order to produce the rubber body 4, you may add the said additive to the rubber material after bridge
- the additive When the additive is added to the rubber material, it may be added in a state where it is contained in a solvent such as water, toluene, methyl isobutyl ketone, or isopropyl alcohol.
- a solvent such as water, toluene, methyl isobutyl ketone, or isopropyl alcohol.
- the ratio of the solid content of the additive to the solvent is preferably 29 wt% or more and 57 wt% or less, more preferably 29 wt% or more and 37 wt% or less.
- the additive may be added in a powder form, not in a state of being included in the solvent as described above.
- the gas generated by the decomposition of the electrolytic solution is mainly carbon dioxide (CO 2 ).
- CO 2 carbon dioxide
- the primary amine has a high affinity for CO 2 in the chemical structural formula. Therefore, the additive attract CO 2. From a microscopic viewpoint, when the concentration of CO 2 locally increases in this way, it is considered that the concentration gradient makes it easier for CO 2 to permeate the rubber body 4. Therefore, it is considered that the CO 2 selective permeability is improved.
- the rubber body 4 can maintain the same airtightness as that of a conventional rubber material against moisture that may enter from the outside of the case 2. Therefore, since hydrolysis in the power storage device 31 can be suppressed, characteristic deterioration can be suppressed.
- the rubber body 4 is disposed in the opening of the case 2, a part of the surface is exposed inside the case 2, and another part of the surface of the rubber body 4 is exposed toward the outside of the case 2. If it is effective.
- the rubber body 4 As described above, by using the rubber body 4, the permeability of gas generated by the decomposition of the electrolytic solution accommodated in the case 2 is increased while suppressing the ingress of moisture from the outside of the case 2. Can do.
- the amine value representing the amount (mmol) of amine contained in 1 g of the additive solid content is preferably 0.6 or more and 2.7 or less. Furthermore, it is preferable that the amine hydrogen equivalent which represents the solid content weight (g) of the additive corresponding to 1 mol of amine is 350 or more and 1800 or less.
- the additive among the primary amine compounds, a polymer compound is particularly preferable, and a functional group (—NH 2 ) that forms a primary amine is provided at the end of the side chain in the polymer compound. Is preferred. In this way, the primary amine component of the additive is provided at the end of the chemical structure, which is likely to cause a chemical change with other compounds, so that the positive permeation of CO 2 can be promoted.
- an insulating composition containing the above additives may be used in the same manner as the rubber body 4. With this configuration, excellent gas permeation can be performed also from the insulating member 5.
- the purpose of this test is to quantitatively evaluate the state in which gas preferentially permeates through the rubber body from the inside of the power storage device 31 compared to the moisture that enters the power storage device 31 from the outside. Therefore, a value called CO 2 selective permeability improvement rate (hereinafter referred to as improvement rate) is used.
- the improvement rate is the ratio between the actual CO 2 permeability coefficient and the moisture permeability coefficient of each sample.
- the improvement rate of the comparative example is 1.0 and the improvement rate of the samples A to D is the ratio of the improvement rate of the comparative example. It represents as.
- the gas permeability is evaluated based on gas chromatography specified in the JIS standard (JISK7126-1).
- the apparatus used for this evaluation method includes a gas permeable cell for allowing a test piece to pass gas, a pressure sensor for detecting a pressure change caused by the transmitted gas, a gas supplier for supplying gas to the gas permeable cell, a cell capacity variable device, It consists of a vacuum pump.
- the gas permeation cell is composed of an upper chamber (high pressure side) and a lower chamber (low pressure side). In this test, the lower chamber is first sealed with a test piece. The lower chamber is kept in a vacuum state at the start of the test. Then supplying a gas (CO 2) to the upper chamber, and transmits the test piece towards the lower chamber.
- CO 2 gas
- the test piece has a transmission area of about 0.2 cm 2 and a thickness of about 2 to 3 mm.
- Sample A was prepared by mixing silicone rubber as a rubber material and a solution prepared by mixing toluene and an additive represented by the chemical formula (1) with the rubber material so that the solid content was about 1.5 wt%. It is a rubber body produced by using.
- an additive an aminoethylated acrylic polymer is used as an example.
- the amine hydrogen equivalent is 800 to 1400, and the amine value is 0.7 to 1.3.
- Sample B is a rubber body prepared using a solution prepared by mixing toluene and the above-described additives with the rubber material so that the solid content addition amount is 2.0 wt%.
- Sample C is a rubber body produced using a solution prepared by mixing toluene and the above-mentioned additives with the rubber material of Sample A so that the solid content addition amount is 3.0 wt%.
- Sample D is a rubber body produced using a solution prepared by mixing toluene and the above additives with the rubber material of Sample A so that the solid content addition amount is about 5.7 wt%.
- a rubber body composed only of a rubber material made of silicone rubber is evaluated.
- the rubber body in which the additive amount exceeds 2.0 wt% can particularly preferentially release the gas in Case 2 as compared with the comparative example.
- the addition amount of the solution which mixed the additive and the solvent has preferable 2 wt% or more. This is because, as shown in Table 1, by setting the addition amount within this range, the CO 2 selective permeability improvement rate is remarkably improved and the gas exhaust capability is increased.
- solid content addition amount shall be 20 wt% or less. This is because it becomes difficult to maintain the airtightness of the manufactured rubber body and the uniformity of the distribution of the additive if the additive amount is increased. Moreover, since it becomes difficult to control the shape of the rubber body, the yield may be reduced.
- FIG. 4A is a plan view of another power storage device 41 according to the embodiment of the present invention.
- FIG. 4B is a front sectional view of the power storage device 41.
- the structure of the power storage element 1 is the same as that shown in FIG. 2, and the connection between the negative electrode end 1B and the case 2 is the same as described above. The difference is the configuration of the sealing member provided in the opening of the case 2.
- the power storage element 1 that is wound is housed in the case 2 together with the electrolytic solution.
- the opening of the case 2 is sealed with a sealing member formed of a rubber body 14 and a terminal plate 13 formed of the same insulating composition as the rubber body 4.
- the positive end 1 ⁇ / b> A is connected to a metal terminal plate 13, and the negative end 1 ⁇ / b> B is connected to the inner bottom surface of the case 2.
- the power storage element 1 may be joined and electrically connected to the inner bottom surface of the case 2 with a metal plate similar to the intermediate body 6 interposed therebetween.
- the terminal plate 13 includes a flat plate portion 13A connected to the power storage element 1 and a terminal portion 13B formed on the flat plate portion 13A and projecting outward from the opening of the case 2.
- the terminal portion 13B is exposed to the outside through a through hole 14A provided in the rubber body 14.
- the terminal portion 13B closes the through hole 14A and seals this portion.
- the material of the terminal board 13 is not particularly limited as long as it has conductivity.
- a metal material such as aluminum, iron, stainless steel, copper, or nickel is preferable.
- the outer peripheral surface of the rubber body 14 is in contact with the inner peripheral surface of the case 2. Then, on the outer peripheral surface of the case 2, the drawing portion 2 ⁇ / b> A is provided at a position in contact with the rubber body 14, and the curling portion 2 ⁇ / b> B is provided at the end of the opening of the case 2. Are strongly pressed and the opening is sealed.
- the rubber body 14 having functions of sealing the case 2 and gas permeation is formed of the same insulating composition as the rubber body 4. Therefore, since the number of members can be reduced as compared with the configuration of the power storage device 31, the cost is excellent. Compared with the power storage device 31, the power storage device 41 can easily provide a larger area where the rubber body 14 faces the inside of the case 2. Therefore, gas permeability increases.
- the power storage devices 31 and 41 include the power storage element 1, the electrolytic solution, the case 2, and the sealing member.
- the power storage element 1 includes a positive electrode 51, a negative electrode 52 facing the positive electrode 51, and a separator 53 interposed between the positive electrode 51 and the negative electrode 52.
- the electrolytic solution is impregnated in the electric storage element 1.
- Case 2 contains electrical storage element 1 and electrolyte.
- the sealing member seals the opening provided in the case 2. At least a part of the sealing member is made of an insulating composition including a base material capable of gas permeation and a primary amine compound as an additive.
- the electrodes are electrically drawn out to the outside using the lead terminals 104A and 104B.
- a lead portion having a conductive shape such as a linear shape, a plate shape, a column shape, or a cylindrical shape that is joined to the power storage element 1 and extends through the rubber body to lead the electrode to the outside.
- the above-described insulating composition can be applied to the rubber body even in the configuration described above. Even in such a configuration, the same effect can be obtained.
- the configuration of sealing the opening of the case 2 is not limited to the configuration of the terminal plate 3 and the rubber body 4 that are the sealing plates of the power storage device 31 or the configuration of the power storage device 41.
- the configuration of the electric storage element 1 is not limited to the above-described winding shape, and may be a configuration in which a plurality of positive electrodes and negative electrodes are opposed to each other and a separator is interposed therebetween. Moreover, even if the positive electrode end 1 ⁇ / b> A of the electricity storage device 1 is directly joined to the terminal plate 3 without using the intermediate body 6, the effect of the present invention can be similarly obtained.
- the positive electrode material layer 51B and the negative electrode material layer 52B are not limited to the above configuration, and may be a lithium alloy, a silicon material, a lithium composite oxide, or a carbon material capable of occluding cations such as graphite.
- the electrolyte solution is not particularly limited, such as an amidine salt, an onium salt, or a lithium salt.
- an electrolyte composed of an electrolyte composed of a cation such as ethyldimethylimidazolium, ethyltrimethylammonium, or lithium and an anion such as hexafluorophosphate or tetrafluoroborate, and a solvent such as carbonates or lactones may be used. It can.
- the solvent is not particularly limited as long as it contains a cation and an anion.
- the power storage device is not limited to the electric double layer capacitor.
- a lithium ion capacitor or a lithium secondary battery may be used.
- a lithium ion capacitor lithium ions are occluded in a negative electrode material formed on a negative electrode current collector. Therefore, the withstand voltage is higher than that of the electric double layer capacitor.
- a lithium metal oxide compound is used for the positive electrode, and a carbon material or a silicon compound is used for the negative electrode.
- an organic solvent is used as a solvent and moisture permeation affects characteristic deterioration
- the same effect can be obtained by using a rubber body formed of the above-described insulating composition.
- the gas generated inside the case can be preferentially exhausted compared to the moisture that enters the rubber body that seals the opening of the case. Therefore, a highly reliable power storage device can be manufactured.
- This power storage device can be easily charged and discharged under more severe conditions. Therefore, it is expected to be used as a power storage device that needs to be charged and discharged in a harsh environment under the temperature and charge / discharge conditions such as in-vehicle use.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
Abstract
Description
1A 正極端部
1B 負極端部
2 ケース
2A 絞り加工部
2B カーリング加工部
3,13 端子板
3A,6A,14A 貫通孔
3B フランジ部
4,14 ゴム体
5 絶縁部材
6 中間体
7 固定部材
13A 平板部
13B 端子部
31,41 蓄電装置
51 正極
51A,52A 集電体
51B 正極材料層
52 負極
52B 負極材料層
53 セパレータ
Claims (8)
- 気体透過が可能な基材と、添加剤とを含み、
前記添加剤は、第1級アミン化合物である、
絶縁組成物。 - 前記基材が、シリコーンゴム、ブチルゴム、エチレンプロピレンゴムのうち少なくとも一種から構成されている、
請求項1に記載の絶縁組成物。 - 前記添加剤の固形分添加量は、前記基材の重量に対して2wt%より多く、20wt%以下である、
請求項1に記載の絶縁組成物。 - 正極と、前記正極に対向する負極と、前記正極と前記負極との間に介在するセパレータと、を有する蓄電素子と、
前記蓄電素子に含浸した電解液と、
開口部を設けられ、前記蓄電素子と前記電解液とを収容したケースと、
前記ケースの前記開口部を封止するとともに、その一部が請求項1記載の絶縁組成物で構成された封止部材と、を備えた、
蓄電装置。 - 前記基材が、シリコーンゴム、ブチルゴム、エチレンプロピレンゴムのうち少なくとも一種から構成されている、
請求項5に記載の蓄電装置。 - 前記添加剤の固形分添加量は、前記基材の重量に対して2wt%より多く、20wt%以下である、
請求項5に記載の蓄電装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US14/344,034 US20140226261A1 (en) | 2011-10-07 | 2012-10-04 | Electricity storage device and insulating composition used therein |
CN201280049174.6A CN103875049A (zh) | 2011-10-07 | 2012-10-04 | 蓄电装置和用于该蓄电装置中的绝缘组合物 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2011-222479 | 2011-10-07 | ||
JP2011222479 | 2011-10-07 |
Publications (1)
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WO2013051273A1 true WO2013051273A1 (ja) | 2013-04-11 |
Family
ID=48043453
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2012/006383 WO2013051273A1 (ja) | 2011-10-07 | 2012-10-04 | 蓄電装置とそれに用いられる絶縁組成物 |
Country Status (4)
Country | Link |
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US (1) | US20140226261A1 (ja) |
JP (1) | JPWO2013051273A1 (ja) |
CN (1) | CN103875049A (ja) |
WO (1) | WO2013051273A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2945214A4 (en) * | 2013-07-25 | 2017-02-15 | LG Chem, Ltd. | Lithium secondary battery including gas permeable membrane |
JP2018507542A (ja) * | 2015-01-15 | 2018-03-15 | エル エス エムトロン リミテッドLS Mtron Ltd. | 電解質の漏出防止構造を有する電気エネルギー貯蔵装置の外部ターミナル |
JP2020123434A (ja) * | 2019-01-29 | 2020-08-13 | トヨタ自動車株式会社 | 非水電解液二次電池の製造方法 |
US11315743B2 (en) * | 2018-09-28 | 2022-04-26 | Taiyo Yuden Co., Ltd. | Method of producing electrochemical device using two welding electrodes to weld lead plates |
Citations (3)
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JP2002217072A (ja) * | 2001-01-17 | 2002-08-02 | Matsushita Electric Ind Co Ltd | 電子部品 |
JP2003037028A (ja) * | 2001-07-26 | 2003-02-07 | Shizuki Electric Co Inc | コンデンサ |
JP2007273788A (ja) * | 2006-03-31 | 2007-10-18 | Nippon Chemicon Corp | 電解コンデンサ用封口体及び該封口体を用いた電解コンデンサ |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5525907A (en) * | 1978-08-11 | 1980-02-25 | Kyokuto Shibosan Kk | Method of imparting insulation |
JPS62224921A (ja) * | 1986-03-27 | 1987-10-02 | 昭和電工株式会社 | 電解コンデンサ− |
US6013201A (en) * | 1997-05-23 | 2000-01-11 | Shin-Estu Chemical Co., Ltd. | Semiconductive silicone rubber compositions and semiconductive silicone rubber rolls |
TW200518143A (en) * | 2003-07-29 | 2005-06-01 | Matsushita Electric Ind Co Ltd | Aluminum electrolytic capacitor |
-
2012
- 2012-10-04 US US14/344,034 patent/US20140226261A1/en not_active Abandoned
- 2012-10-04 JP JP2013537420A patent/JPWO2013051273A1/ja active Pending
- 2012-10-04 CN CN201280049174.6A patent/CN103875049A/zh active Pending
- 2012-10-04 WO PCT/JP2012/006383 patent/WO2013051273A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002217072A (ja) * | 2001-01-17 | 2002-08-02 | Matsushita Electric Ind Co Ltd | 電子部品 |
JP2003037028A (ja) * | 2001-07-26 | 2003-02-07 | Shizuki Electric Co Inc | コンデンサ |
JP2007273788A (ja) * | 2006-03-31 | 2007-10-18 | Nippon Chemicon Corp | 電解コンデンサ用封口体及び該封口体を用いた電解コンデンサ |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2945214A4 (en) * | 2013-07-25 | 2017-02-15 | LG Chem, Ltd. | Lithium secondary battery including gas permeable membrane |
US10103372B2 (en) | 2013-07-25 | 2018-10-16 | Lg Chem, Ltd. | Lithium secondary battery including gas permeable membrane |
JP2018507542A (ja) * | 2015-01-15 | 2018-03-15 | エル エス エムトロン リミテッドLS Mtron Ltd. | 電解質の漏出防止構造を有する電気エネルギー貯蔵装置の外部ターミナル |
US10074488B2 (en) | 2015-01-15 | 2018-09-11 | Ls Mtron Ltd. | External terminal, having structure for preventing leakage of electrolyte, for electric energy storage device |
US11315743B2 (en) * | 2018-09-28 | 2022-04-26 | Taiyo Yuden Co., Ltd. | Method of producing electrochemical device using two welding electrodes to weld lead plates |
JP2020123434A (ja) * | 2019-01-29 | 2020-08-13 | トヨタ自動車株式会社 | 非水電解液二次電池の製造方法 |
JP7202526B2 (ja) | 2019-01-29 | 2023-01-12 | トヨタ自動車株式会社 | 非水電解液二次電池の製造方法 |
Also Published As
Publication number | Publication date |
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US20140226261A1 (en) | 2014-08-14 |
JPWO2013051273A1 (ja) | 2015-03-30 |
CN103875049A (zh) | 2014-06-18 |
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