JPH02304863A - Nonaqueous electrolyte battery - Google Patents
Nonaqueous electrolyte batteryInfo
- Publication number
- JPH02304863A JPH02304863A JP1124914A JP12491489A JPH02304863A JP H02304863 A JPH02304863 A JP H02304863A JP 1124914 A JP1124914 A JP 1124914A JP 12491489 A JP12491489 A JP 12491489A JP H02304863 A JPH02304863 A JP H02304863A
- Authority
- JP
- Japan
- Prior art keywords
- separator
- porosity
- battery
- microporous membrane
- air permeability
- 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 11
- 230000035699 permeability Effects 0.000 claims abstract description 25
- 239000011149 active material Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 4
- 239000000057 synthetic resin Substances 0.000 claims abstract description 4
- 239000012982 microporous membrane Substances 0.000 claims description 19
- -1 polyethylene Polymers 0.000 claims description 16
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 229920005672 polyolefin resin Polymers 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 9
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 239000005486 organic electrolyte Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- XKTYXVDYIKIYJP-UHFFFAOYSA-N 3h-dioxole Chemical compound C1OOC=C1 XKTYXVDYIKIYJP-UHFFFAOYSA-N 0.000 description 1
- 235000014036 Castanea Nutrition 0.000 description 1
- 241001070941 Castanea Species 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
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- 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
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明はリチウム、ナトリウムなどの軽金属を活物質と
する帯状負極と、金属の酸化物、硫化物あるいはハロゲ
ン化物などを活物質とする帯状正極との間に、セパレー
タを介在させ、これらを捲回してなる渦巻電極体を備え
た非水電解液電池に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention relates to a strip-shaped negative electrode using a light metal such as lithium or sodium as an active material, and a strip-shaped negative electrode using a metal oxide, sulfide, or halide as an active material. The present invention relates to a non-aqueous electrolyte battery including a spiral electrode body formed by winding the separator with a separator interposed between the positive electrode and the positive electrode.
（ロ）従来の技術
電池から大きな電流を取り出そうとする場合には、一般
に電極体を渦巻状として、正、負極間の対向面積を大き
くする方法がとられる。しかし、有機電解液を用いる非
水電解液電池では、電解液の電気伝導度が比較的低いの
で対向面積を大きくするだけでは十分ではなく、電極間
距離をできるだけ小さくする必要がある。つまり、セパ
レータの厚みを薄くする必要がある。このような構造は
大電流を取り出すのに都合がよいが、セパレータに不織
布などを用いた場合には、外部短絡を起こし過大電流が
流れると、短絡電流によるジュール熱で電池が異常に高
温になることがある。(B) Prior Art When attempting to extract a large current from a battery, a method is generally used in which the electrode body is formed into a spiral shape to increase the facing area between the positive and negative electrodes. However, in a non-aqueous electrolyte battery using an organic electrolyte, the electrical conductivity of the electrolyte is relatively low, so simply increasing the facing area is not sufficient, and it is necessary to reduce the distance between the electrodes as much as possible. In other words, it is necessary to reduce the thickness of the separator. This type of structure is convenient for extracting large currents, but if nonwoven fabric is used as the separator, if an external short circuit occurs and an excessive current flows, the Joule heat caused by the short circuit current will cause the battery to become abnormally high temperature. Sometimes.
特開昭６０−２３９５４号公報では、上記外部短絡時に
於ける安全を確保するために、セパレータに微多孔膜を
用いることが提案されている。このようにセパレータに
微多孔膜を用いると、外部短絡が起きた場合においても
、短絡電流によるジュール熱で電池温度が上昇すると、
微多孔膜の微細孔が溶融物で閉塞されてイオンの移動を
阻止できる。これにより、電池内の電流が流れなくなる
ので、電池温度の上昇が抑制されて、セパレータに不織
布を用いた場合のように電池が異常に高温になることが
防止できる。また、特開昭６０−２３９５４号公報では
実施例においてポリプロピレン製とポリエチレン製の２
種類の微多孔膜が記載されているが、ポリエチレンの方
が融点が低いため、電池温度の上昇が小さくより安全で
ある。Japanese Unexamined Patent Publication No. 60-23954 proposes the use of a microporous membrane as a separator in order to ensure safety in the event of an external short circuit. If a microporous membrane is used as a separator in this way, even if an external short circuit occurs, the Joule heat caused by the short circuit current will cause the battery temperature to rise.
The fine pores of the microporous membrane are blocked by the melt to prevent ion movement. This prevents current from flowing within the battery, suppressing a rise in battery temperature, and preventing the battery from becoming abnormally high temperature as in the case where a nonwoven fabric is used for the separator. In addition, in JP-A No. 60-23954, in the examples, two types of polypropylene and polyethylene were used.
Although several types of microporous membranes have been described, polyethylene has a lower melting point and therefore is safer with less rise in battery temperature.
ところが上記微多孔膜を用いた非水電解液電池において
、微多孔膜の膜厚による影響を考慮し、低温及び室温で
の大電流放電特性を改善しようとしたが、十分な効果が
得られなかった。However, in non-aqueous electrolyte batteries using the above-mentioned microporous membrane, attempts were made to improve the large current discharge characteristics at low temperatures and room temperatures by taking into account the effect of the thickness of the microporous membrane, but no sufficient effect was obtained. Ta.
（ハ）発明が解決しようとする課題
本発明は前記問題点に鑑みてなされたものであって、有
機電解液を用いる非水電解液電池の、低温及び室温作動
時における大電流放電の特性を改善しようとするもので
ある。(c) Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned problems, and aims to improve the characteristics of large current discharge during low temperature and room temperature operation of non-aqueous electrolyte batteries using organic electrolytes. It is something that we try to improve.
（ニ）課題を解決するための手段
本発明の非水電解液電池は、軽金属を活物質とする帯状
負極と、帯状正極との間に、合成樹脂製の微多孔膜から
なるセパレータを介在させ、前記正、負極及びセパレー
タを捲回して構成した渦巻電極体を備え、前記微多孔膜
は、透気度が５０〜３５０ｓｅｃ／１００ｃｃ一枚、空
孔率が５０〜８０％、膜厚が１０〜４０μｍであること
を特徴とするものである。(d) Means for Solving the Problems The non-aqueous electrolyte battery of the present invention has a separator made of a microporous synthetic resin membrane interposed between a strip-shaped negative electrode containing a light metal as an active material and a strip-shaped positive electrode. , the microporous membrane has an air permeability of 50 to 350 sec/100 cc per sheet, a porosity of 50 to 80%, and a membrane thickness of 10%. It is characterized by being ~40 μm.
ここで微多孔膜の主成分としては、ポリオレフィン系樹
脂が好ましく、特にポリエチレン、ポリプロピレン等が
好適である。Here, as the main component of the microporous membrane, polyolefin resins are preferred, and polyethylene, polypropylene, etc. are particularly preferred.
（ホ）作用
有機電解液を用いるこの種電池において、大電流を取り
出す方法としては、上述したように電極体を渦巻状にし
て正、負極間の対向面積を大きくすること、及びセパレ
ータを薄くして正、負極間の距離を短くすることが挙げ
られる。しかし、セパレータとして単に膜厚の薄い微多
孔膜を用いるだけでは、放電時のリチウムイオンの移動
距離が短くなるものの、低温での放電特性は十分に改善
されない。これは微多孔膜内でのリチウムイオンの移動
のし易さに起因していると考えられる。この膜内におけ
るリチウムイオンの移動の容易さは、微多孔膜の透気度
及び空孔率に大きく依存することが、本発明者の検討に
より判明した。つまり、微多孔膜の膜厚を１０〜４０μ
ｍとし、加えて透気度を５０−３５０ｓ、ｅｃ／１００
ｃｃ ・枚とし、更には空孔率を５０〜８０％と規定す
ることにより、リチウムイオンの移動距離や、低温及び
室温作動時におけるリチウムイオンの移動の容易さが相
互に効率良く改善しうる。その結果、低温及び室温作動
時における、この種電池の大電流放電の特性が向上する
。(e) In this type of battery that uses a functional organic electrolyte, a method for extracting a large current is to make the electrode body spiral to increase the facing area between the positive and negative electrodes, and to make the separator thinner. An example of this is to shorten the distance between the positive and negative electrodes. However, simply using a thin microporous membrane as a separator shortens the distance that lithium ions travel during discharge, but does not sufficiently improve the discharge characteristics at low temperatures. This is considered to be due to the ease of movement of lithium ions within the microporous membrane. The inventor's studies have revealed that the ease of movement of lithium ions within this membrane largely depends on the air permeability and porosity of the microporous membrane. In other words, the thickness of the microporous membrane is 10 to 40μ.
m, and in addition, the air permeability is 50-350s, ec/100
cc · sheets and furthermore, by specifying the porosity as 50 to 80%, the migration distance of lithium ions and the ease of movement of lithium ions during low temperature and room temperature operation can be mutually and efficiently improved. As a result, the high current discharge characteristics of this type of battery during low temperature and room temperature operation are improved.
（へ）実施例
二酸化マンガン、導電剤及び結着剤としてのフッ素樹脂
を、それぞれ８５：１０：５の重量比で混合しペースト
状としたものを、ステンレス製のラス板に塗着、乾燥し
た後、圧延を数回行なって所定の厚みにし、これを熱処
理して帯状正極を得た。(F) Example Manganese dioxide, a conductive agent, and a fluororesin as a binder were mixed in a weight ratio of 85:10:5, respectively, and made into a paste, which was applied to a stainless steel plate and dried. Thereafter, rolling was performed several times to obtain a predetermined thickness, and this was heat-treated to obtain a strip-shaped positive electrode.
また、セパレータとしてポリエチレン含有量が９９重量
％以上であり、膜厚が２５μｍ、透気度が１７０ｓｅｃ
／１００ｃｃ ・枚、空孔率が６０％である微多孔膜を
用い、このセパレータで帯状リチウム負極の両面を覆っ
たものを用意する。In addition, as a separator, the polyethylene content is 99% by weight or more, the film thickness is 25 μm, and the air permeability is 170 sec.
A microporous membrane with a porosity of 60% and a porosity of 60% was used, and both sides of a strip-shaped lithium negative electrode were covered with the separator.
次いで、セパレータで覆ったリチウム負極に前記正極を
重ねて、これらを巻き取り渦巻を掻体を構成した。この
渦巻電極体を外装缶に挿入した後、プロピレンカーボネ
ート及びｌ、３−ジオキソランの混合溶媒に、過塩素酸
リチウムを溶解してなる電解液を注潰し、封口して本発
明電池Ａを作製した。Next, the positive electrode was stacked on the lithium negative electrode covered with a separator, and these were wound up to form a scroll. After inserting this spiral electrode body into an outer can, an electrolytic solution prepared by dissolving lithium perchlorate in a mixed solvent of propylene carbonate and l,3-dioxolane was poured and sealed, to prepare a battery A of the present invention. .
第１図は、上記電池の縦断面図である。第１図において
、１は正極、２は負極、３はセパレータ、４は外装缶、
５は封口蓋、６は絶縁パ・ソキング、７は負極リード、
８は正極リード、９は缶底絶縁板、ｌＯは絶縁部材であ
る。FIG. 1 is a longitudinal sectional view of the battery. In Figure 1, 1 is a positive electrode, 2 is a negative electrode, 3 is a separator, 4 is an outer can,
5 is a sealing lid, 6 is an insulation pad/soaking, 7 is a negative electrode lead,
8 is a positive electrode lead, 9 is a can bottom insulating plate, and IO is an insulating member.
また、同時に前記電池Ａにおいて、セパレータの膜厚、
透気度、空孔率及び材質を種々変化させ、その他は同一
の電池Ｂ−Ｎを作製し、これら電池Ａ−Ｎについてパル
ス放電特性比較試験を行なった。この時の条件は、室温
と、−２０℃において、１．ＯＡの電流で３秒間放電し
た後、７秒間放置し、これを繰り返し行なうものであり
、電池電圧が１．５Ｖの終止電圧になる迄のパルス回数
を測定するというものである。次表に、各電池のセパレ
ータの膜厚、透気度、空孔率及びパルス放電回数の相対
値を示す。尚、透気度はＪＩＳ−Ｐ８１１７に基づいて
測定した値であり、空孔率はセパレータの体積、材料の
比重、目付重量を基にし、以下の計算式により算出した
ものである。At the same time, in the battery A, the film thickness of the separator,
Batteries B-N were produced with various changes in air permeability, porosity, and material, but were otherwise the same, and a pulse discharge characteristic comparison test was conducted on these batteries A-N. The conditions at this time were: room temperature, -20°C, 1. After discharging with an OA current for 3 seconds, the battery is left for 7 seconds, and this process is repeated, and the number of pulses until the battery voltage reaches a final voltage of 1.5V is measured. The following table shows the relative values of the separator thickness, air permeability, porosity, and number of pulse discharges for each battery. Note that the air permeability is a value measured based on JIS-P8117, and the porosity is calculated using the following formula based on the volume of the separator, the specific gravity of the material, and the basis weight.
また、パルス放電回数の相対値は、電池Ａのパルス放電
回数を１００として示しである。Moreover, the relative value of the number of pulse discharges is shown assuming that the number of pulse discharges of battery A is 100.
第 １ 表
栗：１を池作製時に内部短縮が生じて不良電池となり測
定できなかった。1st Table Chestnut: Internal shortening occurred during pond preparation in 1, resulting in a defective battery that could not be measured.
第１表において、電池Ｍ、Ｎはポリプロピレン製のセパ
レータを使用しているが、他の電池は、ポリエチレン製
のセパレータを用いている。In Table 1, batteries M and N use polypropylene separators, while the other batteries use polyethylene separators.
第１表の電池Ａ、Ｂ、Ｄ、Ｇの結果より、膜厚と空孔率
が略同じ場合には透気度が小さくなる程、低温パルス放
電特性が向上する傾向があることがわかる。また電池Ａ
、Ｍ、Ｎの結果より、膜厚と透気度が略同じ場合には、
空孔率が小さくなる程（例えば空孔率４５％以下）、室
温パルス放電特性が低下する傾向が観察される。また電
池Ｂのように透気度が大きく （例えば透気度９２０ｓ
ｅｃ／１００ｃｃ・枚）且つ空孔率が小さくなる（例え
ば空孔率５０％）と、低温及び室温でのパルス放電特性
が低下することがわかる。From the results of Batteries A, B, D, and G in Table 1, it can be seen that when the film thickness and porosity are approximately the same, the lower the air permeability, the more the low-temperature pulse discharge characteristics tend to improve. Also battery A
, M, and N, if the film thickness and air permeability are approximately the same,
It is observed that as the porosity becomes smaller (for example, 45% or less), the room temperature pulse discharge characteristics tend to deteriorate. Also, like battery B, the air permeability is large (for example, the air permeability is 920s
ec/100cc/sheet) and the porosity decreases (for example, 50% porosity), it can be seen that the pulse discharge characteristics at low temperature and room temperature deteriorate.
一方、電池りのように透気度が適度（例えば透気度８０
ｓｅｃ／１００ｃｃ・枚）であり、空孔率が比較的大き
い（例えば空孔率７５％）ものは、両パルス特性共優れ
たものである。On the other hand, air permeability is moderate (for example, air permeability 80
sec/100cc/sheet) and a relatively large porosity (for example, 75% porosity) has excellent both pulse characteristics.
また、電池Ｅ、Ｆの結果より、透気度が低くなり過ぎた
り（例えば４０ｓｅｃ／１００ｃｃ・枚以上）、空孔率
が大きくなり過ぎたり（例えば８５％以上）すると、セ
パレータとしての隔離性が十分でなく、電池作製時にセ
パレータを介して内部短絡を起こし電池不良となり、パ
ルス放電が行なえなくなるという不都合が生じることが
わかる。Also, from the results of Batteries E and F, if the air permeability becomes too low (e.g. 40 sec/100 cc/sheet or more) or the porosity becomes too large (e.g. 85% or more), the isolation properties as a separator will deteriorate. It can be seen that this is not sufficient, causing an internal short circuit through the separator during battery fabrication, resulting in a defective battery and the inconvenience that pulse discharge cannot be performed.
第２図はセパレータの膜厚、空孔率が同じまたは類似し
た電池Ａ、Ｃ，Ｄ、Ｇにおける、セパレータの透気度と
、低温パルス放電回数相対値との関係を示す図である。FIG. 2 is a diagram showing the relationship between the air permeability of the separator and the relative value of the number of low-temperature pulse discharges in batteries A, C, D, and G having the same or similar separator thickness and porosity.
第２図より、透気度が３５０ｓｅｃ／１００ｃｃ・枚を
越えると、低温におけるパルス放電特性が低下すること
が理解される。From FIG. 2, it is understood that when the air permeability exceeds 350 sec/100 cc·sheet, the pulse discharge characteristics at low temperatures deteriorate.
したがって、セパレータの透気度としては、５０〜３５
０ｓｅｃ／ １００ｃｃ・枚が好ましいと言える。Therefore, the air permeability of the separator is 50 to 35.
It can be said that 0 sec/100 cc/piece is preferable.
また同様に、第３図はセパレータの膜厚、透気度が同じ
または類似した電池Ａ、 Ｇ、 Ｍ、 Ｎにおける、セ
パレータの空孔率と、室温パルス放電回数相対値との関
係を示す図である。第３図より、空孔率が大きくなる程
、室温におけるパルス放電特性が向上し、５０％を境に
して、これより空孔率が小さくなると、室温パルス放電
特性が低下することが理解できる。Similarly, FIG. 3 is a diagram showing the relationship between the porosity of the separator and the relative value of the number of room temperature pulse discharges in batteries A, G, M, and N whose separator film thickness and air permeability are the same or similar. It is. From FIG. 3, it can be seen that as the porosity increases, the pulse discharge characteristics at room temperature improve, and when the porosity becomes smaller than 50%, the room temperature pulse discharge characteristics deteriorate.
したがってセパレータの空孔率としては、５０〜８０％
とするのが望ましいと言える。Therefore, the porosity of the separator is 50 to 80%.
It can be said that it is desirable to do so.
一方、セパレータの膜厚に関して、セパレータの透気度
と空孔率が近い値を有する電池Ａ、 Ｈ。On the other hand, regarding the film thickness of the separator, batteries A and H have values in which the air permeability and porosity of the separator are close to each other.
Ｉにおける第１表の結果を比較検討すると、膜厚が薄く
なる程、低温及び室温でのパルス放電特性が向上する傾
向があることが伺える。また、電池Ｊ、により、膜厚が
厚い（例えば８０μｍ）と、透気度が５０〜３５０ｓｅ
ｃ／１００ｃｃ・枚の範囲であり且つ空孔率が大きいに
もかかわらず、低温及び室温でのパルス放電特性が低下
することが明らかである。Comparing and examining the results in Table 1 for I, it can be seen that the thinner the film thickness is, the more the pulse discharge characteristics at low temperature and room temperature tend to improve. Also, depending on the battery J, if the film thickness is thick (e.g. 80 μm), the air permeability will be 50 to 350 se.
It is clear that the pulse discharge characteristics at low temperature and room temperature deteriorate even though the porosity is in the range of c/100 cc·sheet and the porosity is large.
よって膜厚の上限は、４０μｍとするのが望ましいこと
がわかる。一方、膜厚の下限については、膜厚が薄すぎ
ると、電池作製時に、セパレータを介して内部短絡が多
発することから、膜厚の下限は１０μｍとするのが好ま
しい。Therefore, it can be seen that the upper limit of the film thickness is preferably 40 μm. On the other hand, regarding the lower limit of the film thickness, if the film thickness is too thin, internal short circuits will occur frequently through the separator during battery production, so the lower limit of the film thickness is preferably 10 μm.
したがってセパレータの膜厚としては、１０〜４０μｍ
とするのが望ましいと言える。Therefore, the thickness of the separator is 10 to 40 μm.
It can be said that it is desirable to do so.
以上、詳述した実施例では、セパレータとじて純度９９
重斌％以上のポリエチレン微多孔膜もしくは純度９９重
量％以上のポリプロピレン微多孔膜を用いたが、電池温
度が上昇した時にはセパレータが溶融し、絶縁膜化する
ものであれば使用可能である。ただし、ポリエチレンの
方がポリプロピレンより融点が低いため、より有効であ
り、ポリエチレンと他の樹脂との混合物や共重合体など
も有効である。In the detailed examples described above, the separator has a purity of 99%.
Although a polyethylene microporous membrane with a purity of 99% or more or a polypropylene microporous membrane with a purity of 99% or more was used, any material whose separator melts and becomes an insulating film when the battery temperature rises can be used. However, since polyethylene has a lower melting point than polypropylene, it is more effective, and mixtures and copolymers of polyethylene and other resins are also effective.
（ト）発明の効果
以上の如く、本発明では非水系電解液電池のセパレータ
として用いる微多孔膜において、透気度を５０〜３５０
ｓｅｃ／１００ｃｃ一枚、空孔率を５０−８０％、膜厚
を１０〜４０μｍと規定しているので、リチウムイオン
の移動距離や、低温及び室温作動時におけるリチウムイ
オンの移動の容易さが、相互に効率良く改善しうる。そ
の結果、低温及び室温作動時における、この種を池の大
電流放電特性を向上しうるちのであり、その工業的価値
は極めて大きい。(g) Effects of the invention As described above, in the present invention, the microporous membrane used as a separator of a non-aqueous electrolyte battery has an air permeability of 50 to 350.
sec/100cc one sheet, porosity of 50-80%, and film thickness of 10-40 μm, so the migration distance of lithium ions and the ease of lithium ion migration during low-temperature and room-temperature operation are Mutual improvements can be made efficiently. As a result, it is possible to improve the large current discharge characteristics of this type of cell during low temperature and room temperature operation, and its industrial value is extremely large.
第１図は本発明の対象となる渦巻電極体を備えた電池の
縦断面図、第２図はセパレータの透気度と低温パルス放
電回数相対値との関係を示す図、第３図はセパレータの
空孔率と室温パルス放電回数相対値との関係を示す図で
ある。
１・・・正極、２・・・負楊、３・・・セパレータ。FIG. 1 is a longitudinal cross-sectional view of a battery equipped with a spiral electrode body, which is the object of the present invention, FIG. 2 is a diagram showing the relationship between the air permeability of the separator and the relative number of low-temperature pulse discharges, and FIG. 3 is a diagram showing the relationship between the separator air permeability and the relative number of low-temperature pulse discharges. FIG. 3 is a diagram showing the relationship between the porosity and the relative value of the number of room temperature pulse discharges. 1... Positive electrode, 2... Negative electrode, 3... Separator.
Claims (4)
間に、合成樹脂製の微多孔膜からなるセパレータを介在
させ、前記正、負極及びセパレータを捲回して構成した
渦巻電極体を備え、 前記微多孔膜は、透気度が５０〜３５０ｓｅｃ／１００
ｃｃ・枚、空孔率が５０〜８０％、膜厚が１０〜４０μ
ｍであることを特徴とする非水電解液電池。(1) A separator made of a microporous synthetic resin membrane is interposed between a strip-shaped negative electrode containing a light metal as an active material and a strip-shaped positive electrode, and a spiral electrode body is constructed by winding the positive, negative electrodes and separator. The microporous membrane has an air permeability of 50 to 350 sec/100
cc/sheet, porosity 50-80%, film thickness 10-40μ
A non-aqueous electrolyte battery characterized in that m.
であることを特徴とする請求項（１）記載の非水電解液
電池。(2) The non-aqueous electrolyte battery according to claim 1, wherein the main component of the microporous membrane is a polyolefin resin.
とを特徴とする請求項 記載の非水電解液電池。(3) The non-aqueous electrolyte battery according to claim 1, wherein the main component of the microporous membrane is polyethylene.
ことを特徴とする請求項（２）載の非水電解液電池。(4) The non-aqueous electrolyte battery according to claim (2), wherein the main component of the microporous membrane is polypropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1124914A JPH02304863A (en) | 1989-05-18 | 1989-05-18 | Nonaqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1124914A JPH02304863A (en) | 1989-05-18 | 1989-05-18 | Nonaqueous electrolyte battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02304863A true JPH02304863A (en) | 1990-12-18 |
Family
ID=14897246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1124914A Pending JPH02304863A (en) | 1989-05-18 | 1989-05-18 | Nonaqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02304863A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0655793A2 (en) * | 1993-11-19 | 1995-05-31 | Medtronic, Inc. | High-reliability electrochemical cell and electrode assembly therefor |
| JP2005293950A (en) * | 2004-03-31 | 2005-10-20 | Tdk Corp | Lithium ion secondary battery and charging method of lithium ion secondary battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63276868A (en) * | 1987-05-08 | 1988-11-15 | Tokuyama Soda Co Ltd | Separator for cell |
-
1989
- 1989-05-18 JP JP1124914A patent/JPH02304863A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63276868A (en) * | 1987-05-08 | 1988-11-15 | Tokuyama Soda Co Ltd | Separator for cell |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0655793A2 (en) * | 1993-11-19 | 1995-05-31 | Medtronic, Inc. | High-reliability electrochemical cell and electrode assembly therefor |
| EP0655793A3 (en) * | 1993-11-19 | 1997-03-12 | Medtronic Inc | High-reliability electrochemical cell and electrode assembly therefor. |
| JP2005293950A (en) * | 2004-03-31 | 2005-10-20 | Tdk Corp | Lithium ion secondary battery and charging method of lithium ion secondary battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100646535B1 (en) | Electrode Assembly for Lithium Ion Second Battery and Lithium Ion Secondary Battery using the Same | |
| JPH0778635A (en) | Safe secondary battery of non-aqueous group | |
| JP2006032246A (en) | Separator for nonaqueous electrolyte battery and nonaqueous electrolyte battery | |
| US9048490B2 (en) | Lithium ion secondary battery | |
| JPH0516139B2 (en) | ||
| JP4382557B2 (en) | Non-aqueous secondary battery | |
| JP2642206B2 (en) | Explosion-proof secondary battery | |
| JPS6023954A (en) | Nonaqueous electrolyte battery | |
| JPS63308866A (en) | Nonaqueous electrolytic solution battery | |
| JPH0562662A (en) | Nonaqueous electrolyte secondary battery | |
| JPH02304863A (en) | Nonaqueous electrolyte battery | |
| JPH0548209U (en) | Non-aqueous electrolyte battery | |
| JPH03291848A (en) | Battery | |
| WO2015022862A1 (en) | Separator for electrochemical devices, and electrochemical device | |
| JPH08111214A (en) | Organic electrolytic battery | |
| JPH05190208A (en) | Lithium secondary battery | |
| JPH0887995A (en) | Organic electrolyte battery | |
| JP2792859B2 (en) | Non-aqueous electrolyte battery | |
| JP2016181323A (en) | Separator for electrochemical device and electrochemical device | |
| JPS63205048A (en) | Nonaqueous electrolyte battery | |
| JPS61232560A (en) | Lithium battery | |
| JP2925631B2 (en) | Non-aqueous electrolyte battery | |
| JPH01161671A (en) | Nonaqueous electrolyte battery | |
| JP3307231B2 (en) | Non-aqueous electrolyte secondary battery | |
| JP2005141997A (en) | Lithium / iron disulfide primary battery, and manufacturing method |