JPS63205048A - Nonaqueous electrolyte battery - Google Patents
Nonaqueous electrolyte batteryInfo
- Publication number
- JPS63205048A JPS63205048A JP62038167A JP3816787A JPS63205048A JP S63205048 A JPS63205048 A JP S63205048A JP 62038167 A JP62038167 A JP 62038167A JP 3816787 A JP3816787 A JP 3816787A JP S63205048 A JPS63205048 A JP S63205048A
- Authority
- JP
- Japan
- Prior art keywords
- separator
- battery
- aqueous electrolyte
- electrolyte battery
- positive
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 30
- 229920003020 cross-linked polyethylene Polymers 0.000 claims abstract description 9
- 239000004703 cross-linked polyethylene Substances 0.000 claims abstract description 9
- 239000011149 active material Substances 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 150000002736 metal compounds Chemical class 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- -1 polyethylene Polymers 0.000 abstract description 13
- 239000004698 Polyethylene Substances 0.000 abstract description 10
- 229920000573 polyethylene Polymers 0.000 abstract description 10
- 150000002500 ions Chemical class 0.000 abstract description 5
- 239000000155 melt Substances 0.000 abstract description 4
- 239000012982 microporous membrane Substances 0.000 description 9
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000007774 positive electrode material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 2
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- QLOAVXSYZAJECW-UHFFFAOYSA-N methane;molecular fluorine Chemical compound C.FF QLOAVXSYZAJECW-UHFFFAOYSA-N 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
-
- 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
- H01M2200/00—Safety devices for primary or secondary batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Separators (AREA)
Abstract
Description
【発明の詳細な説明】
皇叉上■■朋分立
本発明は非水電解液電池に関し、殊にそのセパレータに
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nonaqueous electrolyte battery, and particularly to a separator thereof.
ｌ米■孜玉
非水電解液電池は高エネルギー密度で、且つ自己放電が
少ないという利点を有しており、近年特に大電流用の電
池として注目されている。Nonaqueous electrolyte batteries have the advantages of high energy density and low self-discharge, and have recently attracted attention as batteries for large currents.
ところで、この非水電解液電池は非水電解液の電導度が
低く、大電流を取り出すためには正負両極の対向面積を
太き（する必要があるが、対向面積を大きくすると、電
池自身が大型化してしまうという欠点があった。この欠
点を解消するために上記非水電解液電池は、金属化合物
を活物質とする正極と軽金属を活物質とする負極との間
にポリエチレンやポリプロピレン等からなる不織布で形
成されたセパレータを介挿して、これら正穫、セパレー
タ、負極の３者を巻回してなる渦巻式電極を採用してい
た。しかし、この電池を外部短絡させた場合、短絡電流
によるジュール熱のために電池の温度上昇が起こり、セ
パレータであるところの不織布が軟化溶融し、正負両極
が接触して内部短絡が起こり、一層の温度上昇を招来す
ると共に、前記非水電解液の分解によりガスが発生し、
電池の発火、爆発等が起こる虞があるという問題点があ
った。By the way, in this non-aqueous electrolyte battery, the conductivity of the non-aqueous electrolyte is low, and in order to extract a large current, it is necessary to increase the facing area of the positive and negative electrodes, but if the facing area is increased, the battery itself will It had the disadvantage of being large in size.In order to overcome this disadvantage, the above-mentioned non-aqueous electrolyte battery uses polyethylene, polypropylene, etc. A spiral electrode was used in which the positive electrode, the separator, and the negative electrode were wound around a separator made of nonwoven fabric.However, when this battery was short-circuited externally, the short-circuit current caused The temperature of the battery rises due to Joule heat, and the nonwoven fabric that serves as a separator softens and melts, causing the positive and negative electrodes to come into contact and causing an internal short circuit, causing a further temperature rise and decomposition of the non-aqueous electrolyte. Gas is generated by
There is a problem that there is a risk that the battery may catch fire or explode.
そこで、出願人はセパレータとしてポリエチレンやポリ
プロピレンの微多孔膜を使用することによって、上述の
ような問題点を解消すべく非水電解法電池を既に提案し
ている（特開昭６０−２３９５４号公報、ＰＴＣ： Ｈ
ＯＩＭ ６／１６）。即ち、該非水電解液電池はセパレ
ータにポリエチレンやポリプロピレンの微多孔膜を使用
したので、外部短絡が起こって短絡電流によるジュール
熱のために電池の温度上昇が生じても、上記微多孔膜が
溶融して微多孔を閉塞し、正負両極間のイオンの移動が
阻止され、電流が流れなくなる。つまり、電池の温度上
昇が抑制され、電池の発火、爆発等が起こる危険性が生
じなくなり、安全性もある程度改善されたものとなった
。Therefore, the applicant has already proposed a non-aqueous electrolysis battery using a microporous membrane of polyethylene or polypropylene as a separator to solve the above-mentioned problems (Japanese Patent Laid-Open No. 60-23954, PTC:H
OIM 6/16). That is, since the non-aqueous electrolyte battery uses a microporous membrane made of polyethylene or polypropylene for the separator, even if an external short circuit occurs and the temperature of the battery rises due to Joule heat caused by the short circuit current, the microporous membrane will not melt. This blocks the micropores and prevents the movement of ions between the positive and negative electrodes, preventing current from flowing. In other words, the temperature rise of the battery is suppressed, and the risk of battery ignition, explosion, etc. is eliminated, and safety is improved to some extent.
、Ｏが解ゞ しようとする５ 屯
ところで、非水電解液電池において、渦巻式電極を形成
するセパレータは正負両電極間の距離を短（して電極の
占める割合を小さくするためにできるだけ薄型のもの（
膜厚５０μｍ以下）が望ましい。しかし、正極は活物質
として使用される金属化合物の電導性が悪いために、電
導性の良い黒鉛やアセチレンブラック等の粉末及び四フ
ッ化エチレンや四フッ化エチレンと六フッ化プロピレン
との共重合体を正極活物質に加えて正極活物質の電導性
及び結着性を上げ、さらにこの混合物に水を加えてペー
スト状とし、ステンレスの芯体に塗布して後乾燥させて
形成している。従って、正極の端部がステンレスの芯体
から剥離し易いだけでなく、該正極をセパレータや負極
と共に巻回して渦巻き状に変形させるとその湾曲部の正
極粉末が正極から剥離する虞がある。そして、正極から
剥離した正極粉末が正極とセパレータとの間に介在した
状態で渦巻式電極を形成すると、正極から剥離した正極
粉末のある電極部分だけがその厚みを増し、そこに接触
しているセパレータが伸張して、膜厚がより一層薄くな
る。By the way, in a non-aqueous electrolyte battery, the separator forming the spiral electrode is made as thin as possible in order to shorten the distance between the positive and negative electrodes (and thus reduce the proportion occupied by the electrodes). thing(
A film thickness of 50 μm or less is desirable. However, since the metal compound used as the active material has poor conductivity, the positive electrode is made of powders such as graphite and acetylene black, which have good conductivity, and tetrafluoroethylene, or a copolymer of tetrafluoroethylene and hexafluoropropylene. The mixture is added to the positive electrode active material to increase the conductivity and binding properties of the positive electrode active material, and water is added to this mixture to form a paste, which is applied to a stainless steel core and then dried. Therefore, not only does the end of the positive electrode easily separate from the stainless steel core, but when the positive electrode is wound together with a separator and a negative electrode and deformed into a spiral, there is a risk that the positive electrode powder at the curved portion may separate from the positive electrode. If a spiral electrode is formed with the positive electrode powder separated from the positive electrode interposed between the positive electrode and the separator, only the part of the electrode where the positive electrode powder separated from the positive electrode is located increases in thickness and is in contact with it. The separator expands and the film thickness becomes even thinner.
一方、セパレータはポリエチレン等のような線状構造で
形成された重合体分子の集合体からなるためにその結合
力が弱（、膜厚が薄くなると、膜平面に垂直な力がかか
った場合破損し易い。特に、数十μｍ程度の微小な部分
に力が集中すると、その傾向が著しくなる。従って、セ
パレータの膜厚が薄くなっている部分に垂直な力がかか
ると、セパレータは破損し、正負両極が短絡し、さらに
この短絡が原因となって該電池の電圧が低下し、所定の
電圧に満たない不良品が発生するという問題点があった
。On the other hand, since separators are made of aggregates of polymer molecules formed in a linear structure such as polyethylene, their bonding strength is weak (as the film becomes thinner, it will break if a force perpendicular to the film plane is applied). In particular, this tendency becomes remarkable when force is concentrated in a minute area of several tens of micrometers.Therefore, if a force is applied perpendicular to the thinner part of the separator, the separator will break. There was a problem in that the positive and negative electrodes were short-circuited, and this short-circuit caused the voltage of the battery to drop, resulting in defective products that did not meet the predetermined voltage.
本発明は上記のような問題点に鑑みなされたもので、セ
パレータの破１員を防止して、品質が向上する非水電解
液電池を提供することを目的としている。The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide a non-aqueous electrolyte battery with improved quality by preventing breakage of the separator.
四 蝋を解゛′するための−
上記目的を達成するために本発明は、酸化力を有する金
属化合物を活物質とする正極と、軽金属を活物質とする
負極と、前記正負両極間に介挿されるセパレータと、非
水電解液とを備えた非水電解液電池において、前記セパ
レータが、架橋したポリエチレンの微多孔膜で形成され
たことを特徴としている。4. To dissolve wax - In order to achieve the above object, the present invention provides a positive electrode having a metal compound having oxidizing power as an active material, a negative electrode having a light metal as an active material, and an intervening material between the positive and negative electrodes. A non-aqueous electrolyte battery comprising a separator inserted therein and a non-aqueous electrolyte, characterized in that the separator is formed of a cross-linked microporous polyethylene membrane.
昨二−−−尻
上記構成によれば、架橋したポリエチレンの微多孔膜は
網目構造をとるので、機械的強度が増す。According to the above configuration, the crosslinked polyethylene microporous membrane has a network structure, so that its mechanical strength is increased.
従って、架橋したポリエチレンを使ったセパレータは適
度な強度を有し、セパレータ膜平面に対して垂直な力が
加わった場合でも破損し難＜、電極の短絡防止がするこ
とができる。また、外部短絡が起こった場合でも、短絡
電流によるジュール熱で電池の温度上昇がおこると、ポ
リエチレンが溶融して微多孔を閉塞し、正負両極間のイ
オンの移動が阻止され、電流が流れなくなり、電池の温
度上昇が抑制される。Therefore, a separator made of crosslinked polyethylene has appropriate strength, is difficult to break even when a force perpendicular to the plane of the separator membrane is applied, and can prevent electrode short-circuiting. In addition, even if an external short circuit occurs, when the temperature of the battery rises due to Joule heat caused by the short circuit current, the polyethylene melts and closes the micropores, blocking the movement of ions between the positive and negative electrodes, and the current no longer flows. , the temperature rise of the battery is suppressed.
叉−族一斑
第１図は本発明の一実施例に係る非水電解液電池の一部
破断正面図である。図において、１は非水電解液電池で
あって、正極２と負極３と前記正負両極間に介挿された
セパレータ４とが巻回されてなる渦巻式電極７と、絶縁
性樹脂からなる上下一対の絶縁スリーブ８ （下側絶縁
スリーブは不図示）と、非水電解液（不図示）と、下端
に正極端子部５ａが形成されると共に前記渦巻式電極７
等を内存する上面開放のステンレス製筒状容器５と、絶
縁性樹脂からなるバッキング１０を介して前記容器５を
施蓋する凸状のステンレス製蓋体６とからなる。FIG. 1 is a partially cutaway front view of a non-aqueous electrolyte battery according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a nonaqueous electrolyte battery, which includes a spiral electrode 7 formed by winding a positive electrode 2, a negative electrode 3, and a separator 4 inserted between the positive and negative electrodes, and an upper and lower upper and lower electrode made of insulating resin. A pair of insulating sleeves 8 (the lower insulating sleeve is not shown), a non-aqueous electrolyte (not shown), a positive electrode terminal portion 5a is formed at the lower end, and the spiral electrode 7
It consists of a stainless steel cylindrical container 5 with an open top surface and a convex stainless steel lid 6 that covers the container 5 via a backing 10 made of insulating resin.
また、前記蓋体６は、負極端子部６ａが形成された上蓋
６Ｃと、一端を負極３に接続したニッケル製の負極タブ
９と電気的に接続される下１６ｂと、からなる。８ａは
前記負極タブ９が貫通する空洞部である。Further, the lid body 6 includes an upper lid 6C in which a negative electrode terminal portion 6a is formed, and a lower portion 16b electrically connected to a negative electrode tab 9 made of nickel whose one end is connected to the negative electrode 3. 8a is a cavity through which the negative electrode tab 9 passes.
前記渦巻式電極７は２枚のセパレータを張り合わせて袋
状とし、その中に負極３を挿入して正極２と共に巻回し
て形成され、且つ渦巻式電極７の最外側に位置する正極
２は前記容器５の内側壁と接触状態とされると共に、渦
巻式電極７の上下端部は前記絶縁スリーブによって容器
５とは非接触状態に保たれている。The spiral electrode 7 is formed by pasting two separators together to form a bag shape, into which the negative electrode 3 is inserted and wound together with the positive electrode 2, and the positive electrode 2 located at the outermost side of the spiral electrode 7 is formed by While being in contact with the inner wall of the container 5, the upper and lower ends of the spiral electrode 7 are kept out of contact with the container 5 by the insulating sleeve.
前記正極２としては酸化力を有する金属化合物の一例と
しての二酸化マンガンを活物質とし、黒鉛を導電剤とし
、四フッ化エチレンを結着剤としは各々容量％で二酸化
マンガン：黒鉛：四フッ化エチレン＝９０：６：４の割
合で混合し、該混合物に水を加えてペースト状としたも
のをステンレスのラス板に塗布し、熱処理を行なって乾
燥させたものを使用した。For the positive electrode 2, manganese dioxide, which is an example of a metal compound having oxidizing power, is used as an active material, graphite is used as a conductive agent, and tetrafluoroethylene is used as a binder, each of which is manganese dioxide: graphite: tetrafluoride in volume %. Ethylene was mixed in a ratio of 90:6:4, and water was added to the mixture to form a paste, which was applied to a stainless steel lath plate, heat-treated, and dried.
前記負極３は軽金属の一例としてのリチウムを活物質と
したものを使用した。The negative electrode 3 was made of lithium, which is an example of a light metal, as an active material.
前記セパレータは厚さ３０μｍ、空孔率５０％最大孔径
２０μｍの架橋したポリエチレン微多孔膜を使用した。The separator used was a crosslinked polyethylene microporous membrane having a thickness of 30 μm, a porosity of 50%, and a maximum pore diameter of 20 μm.
また、非水電解液にはプロピレンカーボネートと１，２
−ジメトキシエタンとの混合溶媒（体積比１：１）に過
塩素酸リチウムを溶解させたものからなり、該過塩素酸
リチウムの濃度が０．７５Ｍとなるように調整したもの
を使用した。In addition, the non-aqueous electrolyte contains propylene carbonate and 1,2
- Dimethoxyethane and lithium perchlorate dissolved in a mixed solvent (volume ratio 1:1) were used, and the concentration of the lithium perchlorate was adjusted to 0.75M.
第１表は本発明の非水電解液電池Ａと、従来の非水電解
液電池Ｂとの組み立て直後の電圧を測定してその不良数
を調べた結果を示したものである。Table 1 shows the results of measuring the voltages of non-aqueous electrolyte battery A of the present invention and conventional non-aqueous electrolyte battery B immediately after assembly, and investigating the number of defects.
尚、非水電解液電池Ｂは、セパレータが線状構造に形成
されたポリエチレンの微多孔膜を使用している他は非水
電解液電池Ａと同様であり、試料数は各々５００個であ
る。また、これらの非水電解液電池はいずれも高さＨは
約３５ｍｍ、直径りは約２０ｍｍである。The non-aqueous electrolyte battery B is the same as the non-aqueous electrolyte battery A except that the separator uses a polyethylene microporous membrane formed in a linear structure, and the number of samples is 500 for each. . Further, each of these non-aqueous electrolyte batteries has a height H of about 35 mm and a diameter of about 20 mm.
第１表
この第１表かられかるように、従来の非水電解液電池Ｂ
には電圧不良のものが８個もあるのに対して、本発明の
一非水電解液電池Ａは電圧不良のものがなく （不良数
Ｏ）、良好な結果を示している。Table 1 As can be seen from this table, conventional non-aqueous electrolyte battery B
There were as many as 8 batteries with voltage failures, whereas non-aqueous electrolyte battery A of the present invention had no voltage failures (number of failures: O), showing good results.
上述の如く構成された非水電解液電池は、セパレータが
架橋したポリエチレンの微多孔膜で形成されているので
、セパレータは網目構造を有して分子間結合力が増大す
ることとなり、強度が向上する。従って、セパレータ膜
平面に対して垂直な力が加わてもセパレータは破損する
虞がなく、正負両電極間の短絡が防止でき、短絡に起因
する電圧の低下も防止でき、高品質の非水電解液電池が
得られ、所期の目的が達成できる。In the non-aqueous electrolyte battery configured as described above, the separator is made of a cross-linked polyethylene microporous membrane, so the separator has a network structure, which increases intermolecular bonding strength and improves strength. do. Therefore, there is no risk of the separator being damaged even if a force perpendicular to the plane of the separator membrane is applied, short circuits between the positive and negative electrodes can be prevented, voltage drops due to short circuits can also be prevented, and high quality non-aqueous electrolysis A liquid battery is obtained and the intended purpose can be achieved.
尚、上記実施例においては、正極活物質に二酸化マンガ
ン、負極活物質にリチウムを用いたものについて示した
が、正極活物質は酸化力を有する金属酸化物であれば良
いのであって酸化銅やフッ化黒鉛でも良く、負極活物質
も軽金属であれば良いのであってナトリウムでも良いの
は言うまでもない。In the above example, manganese dioxide was used as the positive electrode active material and lithium was used as the negative electrode active material, but the positive electrode active material may be any metal oxide with oxidizing power, such as copper oxide or the like. Graphite fluoride may be used, and the negative electrode active material may also be a light metal, so it goes without saying that sodium may also be used.
２浬Ｉと九栗
上記構成によれば、本発明の非水電解液電池はセパレー
タが架橋したポリエチレンの微多孔膜で形成されている
ので、外部短絡が起こってもポリエチレンが溶融して微
多孔を閉塞し正負両極間のイオンの移動を阻止するので
、電流は流れなくなり、電池の温度上昇が抑制され、電
池の安全性が向上する。また、架橋したポリエチレンの
微多孔膜は結合力を増大するので、セパレータの破損が
防止でき、内部短絡を起こして所定電圧が低下するとい
った不都合が起こることのない非水電解液電池を得るこ
とができ、この非水電解液電池の品質が向上するという
効果がある。According to the above configuration, the separator of the non-aqueous electrolyte battery of the present invention is made of a crosslinked polyethylene microporous membrane, so even if an external short circuit occurs, the polyethylene melts and the microporous This blocks the ions and prevents the movement of ions between the positive and negative electrodes, so current no longer flows, suppressing battery temperature rise, and improving battery safety. In addition, since the crosslinked polyethylene microporous membrane increases the bonding strength, it is possible to prevent damage to the separator and obtain a non-aqueous electrolyte battery that does not cause problems such as internal short circuits and a drop in the specified voltage. This has the effect of improving the quality of this non-aqueous electrolyte battery.
第１図は本発明の一実施例に係る非水電解液電池の部分
破断図である。
２・・・正極、３・・・負極、４・・・セパレータ。FIG. 1 is a partially cutaway view of a non-aqueous electrolyte battery according to an embodiment of the present invention. 2...Positive electrode, 3...Negative electrode, 4...Separator.
Claims (1)
属を活物質とする負極と、前記正負両極間に介挿される
セパレータと、非水電解液とを備えた非水電解液電池に
おいて、 前記セパレータが、架橋したポリエチレンの微多孔膜で
形成されたことを特徴とする非水電解液電池。[Scope of Claims] A non-aqueous device comprising a positive electrode using a metal compound with oxidizing power as an active material, a negative electrode using a light metal as an active material, a separator interposed between the positive and negative electrodes, and a non-aqueous electrolyte. A non-aqueous electrolyte battery, wherein the separator is formed of a microporous crosslinked polyethylene membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62038167A JPS63205048A (en) | 1987-02-20 | 1987-02-20 | Nonaqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62038167A JPS63205048A (en) | 1987-02-20 | 1987-02-20 | Nonaqueous electrolyte battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63205048A true JPS63205048A (en) | 1988-08-24 |
Family
ID=12517842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62038167A Pending JPS63205048A (en) | 1987-02-20 | 1987-02-20 | Nonaqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63205048A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127438A (en) * | 1995-03-03 | 2000-10-03 | Asahi Kasei Kogyo Kabushiki Kaisha | Polyethylene microporous film and process for producing the same |
| EP1022798A3 (en) * | 1999-01-22 | 2001-09-12 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte secondary battery |
| US7402360B2 (en) | 2003-03-28 | 2008-07-22 | Sanyo Electric Co., Ltd. | Non-aqueous electrolyte battery |
| US9077025B2 (en) | 2007-05-24 | 2015-07-07 | Nitto Denko Corporation | Method for production of porous film, porous film, separator for non-aqueous electrolyte battery, and non-aqueous electrolyte battery using the separator |
-
1987
- 1987-02-20 JP JP62038167A patent/JPS63205048A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127438A (en) * | 1995-03-03 | 2000-10-03 | Asahi Kasei Kogyo Kabushiki Kaisha | Polyethylene microporous film and process for producing the same |
| EP1022798A3 (en) * | 1999-01-22 | 2001-09-12 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte secondary battery |
| US7402360B2 (en) | 2003-03-28 | 2008-07-22 | Sanyo Electric Co., Ltd. | Non-aqueous electrolyte battery |
| US9077025B2 (en) | 2007-05-24 | 2015-07-07 | Nitto Denko Corporation | Method for production of porous film, porous film, separator for non-aqueous electrolyte battery, and non-aqueous electrolyte battery using the separator |
| US9340653B2 (en) | 2007-05-24 | 2016-05-17 | Nitto Denko Corporation | Method for production of porous film, porous film, separator for non-aqueous electrolyte battery, and non-aqueous electrolyte battery using the separator |
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