JP3107174B2 - Battery separator - Google Patents
Battery separatorInfo
- Publication number
- JP3107174B2 JP3107174B2 JP04038676A JP3867692A JP3107174B2 JP 3107174 B2 JP3107174 B2 JP 3107174B2 JP 04038676 A JP04038676 A JP 04038676A JP 3867692 A JP3867692 A JP 3867692A JP 3107174 B2 JP3107174 B2 JP 3107174B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- hollow
- resin
- fibers
- battery separator
- 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.)
- Expired - Fee Related
Links
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
Landscapes
- Cell Separators (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は電池用セパレータ、特
に、アルカリ電池用セパレータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separator for a battery, and more particularly to a separator for an alkaline battery.
【０００２】[0002]
【従来の技術】従来から、電池の正極と負極とを分離し
て短絡を防止すると共に、電解液を保持して起電反応を
円滑に行なわせるために、セパレータが使用されてい
る。このセパレータは織物や不織布などの形態で提供さ
れるのが一般的で、電解液の保持性を良くするために、
様々な提案がなされている。2. Description of the Related Art Conventionally, a separator has been used to separate a positive electrode and a negative electrode of a battery to prevent a short circuit, and to hold an electrolytic solution so that an electromotive reaction can be smoothly performed. This separator is generally provided in the form of a woven or non-woven fabric, in order to improve the retention of the electrolyte,
Various proposals have been made.
【０００３】例えば、特開昭６１−１５１９６５号公報
には、内部に２０〜３０％の空孔を有し、繊維表面と内
部とが貫通する微細孔を設けた中空繊維を使用したセパ
レータが開示されている。しかしながら、このような中
空繊維は強度が弱いため、極板間に挟み巻回して電池を
組み立てる際に、破断しやすいという問題があるばかり
でなく、仮に破断することなく巻回できたとしても、巻
回する際の圧力によってセパレータの厚みが薄くなるた
め、電解液の保持性が低下するという問題があった。ま
た、二次電池のように充放電を繰り返す電池のセパレー
タとして使用すると、極板が膨張し、セパレータに圧力
がかかった際に、保持していた電解液を遊離するため、
極板表面が電解液によって濡れ、充電効率を低下させる
という問題も生じていた。[0003] For example, Japanese Patent Application Laid-Open No. 61-151965 discloses a separator using hollow fibers having pores of 20 to 30% inside and having fine pores penetrating the fiber surface and the inside. Have been. However, such a hollow fiber has low strength, so when assembling the battery by winding it between electrode plates, not only there is a problem that it is easily broken, but even if it can be wound without breaking, Since the thickness of the separator is reduced by the pressure at the time of winding, there is a problem that the retention of the electrolyte is reduced. In addition, when used as a battery separator that repeats charging and discharging as a secondary battery, the electrode plate expands, and when pressure is applied to the separator, the retained electrolyte is released,
There has also been a problem that the electrode plate surface is wet by the electrolytic solution and the charging efficiency is reduced.
【０００４】他方、特公昭６３−４３１１号公報には、
側面に開口した空孔を有する親液性樹脂繊維を耐電解液
性樹脂繊維と混紡した織物或いは不織布からなるセパレ
ータが開示されている。しかしながら、このような繊維
は空孔率が４０％未満程度の場合には、ある程度の強度
があるものの、空孔率が小さいため電解液の保持性が悪
く、しかも耐電解液性樹脂繊維と混紡しているため、よ
り電解液保持性の悪いものであった。逆に、空孔率が４
０％以上程度の場合には、強度がなく、前記の特開昭６
１−１５１９６５号公報と全く同様の問題が生じてい
た。On the other hand, JP-B-63-4311 discloses that
There is disclosed a separator made of a woven or non-woven fabric obtained by blending lyophilic resin fibers having pores opened on the side surfaces with electrolyte-resistant resin fibers. However, such a fiber has a certain degree of strength when the porosity is less than about 40%, but the porosity is small, so the retention of the electrolyte is poor, and the fiber is blended with the electrolyte-resistant resin fiber. Therefore, the electrolyte retention was worse. Conversely, if the porosity is 4
In the case of about 0% or more, there is no strength, and
A problem exactly the same as that of JP-A-1-195165 has occurred.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記の問題点
を解決するためになされたものであり、強度的に優れ、
極板間に挟んで巻回する時、二次電池の場合には充放電
時も含めて、圧力がかかっても電解液の保持性に優れた
電池用セパレータを提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has excellent strength.
It is an object of the present invention to provide a battery separator which is excellent in the retention of electrolyte even when pressure is applied, including when charging and discharging a secondary battery, when being wound between electrode plates.
【０００６】[0006]
【課題を解決するための手段】本発明は繊維内部２を長
さ方向に区分する中空孔３を２つ以上有し、かつ少なく
とも該中空孔３と繊維表面１とが連通する微細孔４を有
する微細孔中空繊維５を主体として構成された繊維シー
トからなる電池用セパレータである。SUMMARY OF THE INVENTION The present invention has two or more hollow holes 3 for dividing a fiber interior 2 in a longitudinal direction, and has at least a fine hole 4 in which the hollow hole 3 and the fiber surface 1 communicate. It is a battery separator composed of a fiber sheet mainly composed of the microporous hollow fibers 5 having the same.
【０００７】[0007]
【作用】本発明の電池用セパレータに使用する繊維は従
来の中空繊維とは異なり、中空孔３を２つ以上有してお
り、繊維内部２の中空孔間に壁（以下、内壁という）が
形成されているため、極板間に挟んで巻回する時や、二
次電池の場合には充放電の際の圧力に対して抗すること
ができ、形状を保持することができるため、中空孔３及
び微細孔４に電解液を保持することができる。The fiber used in the battery separator of the present invention has two or more hollow holes 3 different from the conventional hollow fiber, and a wall (hereinafter referred to as an inner wall) is formed between the hollow holes inside the fiber 2. Because it is formed, it can withstand the pressure during charging and discharging in the case of winding between electrode plates and winding in the case of a secondary battery, and can maintain the shape, so that it can be hollow The electrolyte can be held in the holes 3 and the fine holes 4.
【０００８】本発明に使用する繊維は図１（ａ）〜
（ｄ）に繊維断面形状を例示するように、繊維内部２を
長さ方向に区分する中空孔３を２つ以上有し、かつ少な
くとも該中空孔３と繊維表面１とが連通する微細孔４を
有する微細孔中空繊維５である。この微細孔中空繊維５
は電解液を微細孔４から中空孔３に浸透させ、保持す
る。なお、微細孔４は繊維表面１と中空孔３との間のみ
ならず、中空孔間の内壁にも微細孔４を有していれば、
中空孔間の浸透もスムーズに行なうことができる。ま
た、内壁は中空孔間に位置しているため、圧力に対する
抗力を微細孔中空繊維５に付与する。そのため、３つ以
上の中空孔３を有するのがより好ましい。The fibers used in the present invention are shown in FIGS.
As shown in (d) of the fiber cross-sectional shape, there are two or more hollow holes 3 for dividing the fiber interior 2 in the length direction, and at least the fine holes 4 in which the hollow holes 3 and the fiber surface 1 communicate with each other. Are hollow fibers 5 having micropores. This microporous hollow fiber 5
Allows the electrolyte to penetrate through the micropores 4 into the hollow pores 3 and be held therein. In addition, if the fine hole 4 has the fine hole 4 not only between the fiber surface 1 and the hollow hole 3 but also on the inner wall between the hollow holes,
Penetration between the hollow holes can be smoothly performed. In addition, since the inner wall is located between the hollow holes, a resistance to pressure is applied to the microporous hollow fibers 5. Therefore, it is more preferable to have three or more hollow holes 3.
【０００９】このような微細孔中空繊維５は通常の複合
紡糸法によって繊維を紡糸した後、中空孔３及び微細孔
４に該当する部分の樹脂成分を抽出除去することにより
得ることができる。この複合紡糸する際には、図１
（ａ）〜（ｄ）において、例えば中空孔３に該当する部
分は抽出可能な単一成分の樹脂（以下、抽出用樹脂とい
う）を使用し、繊維内部２に該当する部分には抽出用樹
脂とは溶解性の異なる樹脂（構成成分樹脂という）と抽
出用樹脂とを混合した融液を使用して紡糸する。なお、
構成成分樹脂と混合する抽出用樹脂は中空孔３に該当す
る部分に使用する抽出用樹脂と同じであっても異なって
いても構わない。[0009] Such a microporous hollow fiber 5 can be obtained by spinning the fiber by an ordinary composite spinning method, and then extracting and removing the resin component corresponding to the hollow hole 3 and the fine hole 4. Fig. 1
In (a) to (d), for example, a portion corresponding to the hollow hole 3 uses an extractable single-component resin (hereinafter, referred to as an extraction resin), and a portion corresponding to the fiber interior 2 includes an extraction resin. The spinning is performed using a melt obtained by mixing a resin having different solubility (referred to as a constituent resin) and a resin for extraction. In addition,
The extraction resin mixed with the constituent resin may be the same as or different from the extraction resin used in the portion corresponding to the hollow hole 3.
【００１０】これら抽出用樹脂と構成成分樹脂は溶解性
が異なれば良いので、様々な組み合わせ方ができる。例
えば、ポリエステル系、ポリエステル共重合体、ナイロ
ン６、ナイロン６６、ナイロン１０、ナイロン１２、ナ
イロン共重合体等のナイロン系、ポリエチレン、ポリプ
ロピレンなどのポリオレフィン系、ポリアクリロニトリ
ル系、ポリエーテル系、ポリウレタン、ポリウレタン共
重合体、ビニル系、ポリスチレン、ポリメチルメタクリ
レートなどの樹脂を組み合わせることができる。これら
の樹脂を使用して複合紡糸した繊維の抽出用樹脂を抽出
する溶剤としてトリクロロエチレン、ペルクロロエチレ
ン、トルエン、キシレン、ベンゼン、フェノール、オル
ソクロロフェノール、アセトンなどを例示できるが、こ
れらに限定されるものではない。これらの中でも、本発
明の電池用セパレータとして使用する場合、耐電解液性
に優れていることが好ましいため、構成成分樹脂とし
て、ナイロン系樹脂、ポリプロピレンなどのポリオレフ
ィン系樹脂を使用するのがより好ましい。[0010] Since the resin for extraction and the constituent resin only need to be different in solubility, various combinations are possible. For example, polyesters, polyester copolymers, nylons 6, nylon 66, nylon 10, nylon 12, nylons such as nylon copolymers, polyolefins such as polyethylene and polypropylene, polyacrylonitriles, polyethers, polyurethanes and polyurethanes Resins such as copolymers, vinyl resins, polystyrene, and polymethyl methacrylate can be combined. Examples of the solvent for extracting the resin for extraction of the fiber spun using these resins include, but are not limited to, trichloroethylene, perchloroethylene, toluene, xylene, benzene, phenol, orthochlorophenol, and acetone. Not something. Among them, when used as the battery separator of the present invention, it is preferable to use a polyolefin-based resin such as a nylon-based resin or a polypropylene as the constituent resin because it is preferably excellent in electrolyte resistance. .
【００１１】上記のように複合紡糸して得られた繊維の
抽出用樹脂を抽出することにより得られる微細孔中空繊
維５の中空孔３は、電解液の保持性の点から、中空孔３
のみの微細孔中空繊維５の体積に占める割合が４０％以
上であることが好ましく、より好ましくは５０％以上で
ある。逆に、７０％を越えると、内壁の強度がなくな
り、圧力に対して抗することができなくなるため、７０
％以下、より好ましくは６５％以下にするのが好まし
い。また、微細孔４の微細孔中空繊維６の中空孔４を除
いた部分に対する割合は、電解液が中空孔３に浸透しや
すいように３０％以上が好ましく、逆に、５０％を越え
ると強度が低下するので、５０％以下にするのが好まし
い。なお、これら中空孔３及び微細孔４の割合は複合紡
糸する際の原料ペレット混合比及び融液の供給量によっ
て制御することができる。[0011] The hollow holes 3 of the microporous hollow fibers 5 obtained by extracting the resin for fiber extraction obtained by the composite spinning as described above are hollow holes 3 from the viewpoint of the retention of the electrolyte.
It is preferable that the ratio of only the microporous hollow fibers 5 to the volume is 40% or more, and more preferably 50% or more. Conversely, if it exceeds 70%, the inner wall loses its strength and cannot withstand pressure.
%, More preferably 65% or less. Further, the ratio of the micropores 4 to the portion excluding the micropores 4 of the micropore hollow fibers 6 is preferably 30% or more so that the electrolyte can easily penetrate into the micropores 3. Is preferably reduced to 50% or less. The ratio of the hollow holes 3 and the fine holes 4 can be controlled by the mixing ratio of the raw material pellets and the supply amount of the melt during the composite spinning.
【００１２】また、上記の微細孔中空繊維５の電解液に
対する親和性を向上させるために、スルホン化処理やフ
ッソ処理などを行なっても良い。Further, in order to improve the affinity of the microporous hollow fibers 5 for the electrolytic solution, a sulfonation treatment or a fluorine treatment may be performed.
【００１３】このような樹脂を複合紡糸して得られた繊
維は、繊維シートを形成する前に抽出用樹脂を抽出除去
しても良いし、繊維シートを形成した後に抽出除去して
も良いが、繊維強度のより大きい状態で繊維シートを形
成する後者の方が、より取り扱いやすい。[0013] The fibers obtained by compound spinning such a resin may be extracted and removed before extracting the fiber sheet, or may be extracted and removed after forming the fiber sheet. The latter, in which the fiber sheet is formed with a higher fiber strength, is easier to handle.
【００１４】以上のように複合紡糸して得られた繊維或
いは微細孔中空繊維５から繊維シートを形成するが、複
合紡糸して得られた繊維或いは微細孔中空繊維以外に、
ナイロン系繊維、ポリプロピレン繊維などのポリオレフ
ィン系繊維を混合して繊維シートを形成しても良い。こ
の微細孔中空繊維５に対する他の繊維の混合量として
は、微細孔中空繊維５の電解液保持性を損わないため
に、１００：０〜５０：５０が適当である。As described above, a fiber sheet is formed from the fiber or microporous hollow fiber 5 obtained by conjugate spinning. In addition to the fiber or microporous hollow fiber obtained by conjugate spinning, a fiber sheet is formed.
Polyolefin fibers such as nylon fibers and polypropylene fibers may be mixed to form a fiber sheet. The mixing amount of the other fibers with the microporous hollow fibers 5 is preferably from 100: 0 to 50:50 so as not to impair the electrolytic solution retention of the microporous hollow fibers 5.
【００１５】この繊維シートの形態としては平織、斜文
織、朱子織などの織物、編物、糸レース、網、平打組
物、不織布などで良く、特に限定するものではないが、
織物、不織布は形態安定性、極板間の絶縁性、そして構
造的に電解液の保持性に優れているため好適に使用でき
る。The form of the fiber sheet may be a woven fabric such as plain weave, oblique weave, or satin weave, a knit, a yarn lace, a net, a flat braided fabric, a nonwoven fabric, and the like.
Woven fabrics and nonwoven fabrics can be suitably used because they have excellent shape stability, insulation between electrode plates, and structurally excellent retention of electrolytes.
【００１６】不織布の製法としては、カード法、エアレ
イ法、湿式法、スパンボンド法、メルトブロー法などに
より得られる繊維ウエブを、接着剤による結合、複合紡
糸して得られる繊維や微細孔中空繊維５或いは混合する
繊維の熱融着による結合、ニードルによる絡合、水流な
どの流体流による絡合或いはステッチによる結合による
方法を例示することができるが、これらに限定されな
い。The nonwoven fabric may be produced by bonding a fiber web obtained by a card method, an air lay method, a wet method, a spunbond method, a melt blow method, or the like with an adhesive or by composite spinning to obtain a fiber or microporous hollow fiber 5. Alternatively, examples of the method include bonding by heat fusion of fibers to be mixed, entanglement by a needle, entanglement by a fluid flow such as a water flow, or bonding by stitching, but are not limited thereto.
【００１７】以上のようにして得られた繊維シートは本
発明の電池用セパレータとして使用することができる。
なお、複合紡糸した繊維から繊維シートを形成した場合
には、複合紡糸した繊維の抽出用樹脂を抽出することに
より、本発明の電池用セパレータを得ることができる。The fiber sheet obtained as described above can be used as the battery separator of the present invention.
When a fiber sheet is formed from the conjugate spun fibers, the battery separator of the present invention can be obtained by extracting a resin for extracting the conjugate spun fibers.
【００１８】以下に、本発明の電池用セパレータの実施
例を記載するが、以下の実施例に限定されるものではな
い。Hereinafter, embodiments of the battery separator of the present invention will be described, but the present invention is not limited to the following embodiments.
【００１９】[0019]
（実施例１）抽出用樹脂としてポリスチレン５０部、構
成成分樹脂として６ナイロン５０部をペレット状態で混
合し、押出機で溶融混練したポリマー融液と、抽出用樹
脂としてポリスチレン１００部を押出機で溶融したポリ
マー融液とを、ギヤーポンプで４０：６０の比率に計量
した後、複合紡糸し、図１(a)に示すような、中空孔３
に該当する８個のポリスチレンからなる部分と、微細孔
４に該当するポリスチレンが６ナイロン中に分散した繊
維内部２からなる繊維断面をもつ複合繊維を得た。(Example 1) 50 parts of polystyrene as an extraction resin and 50 parts of 6 nylon as a constituent resin were mixed in a pellet state, and a polymer melt melt-kneaded with an extruder and 100 parts of polystyrene as an extraction resin were mixed with an extruder. The melted polymer melt was measured at a ratio of 40:60 by a gear pump, and then subjected to composite spinning to form a hollow hole 3 as shown in FIG.
A composite fiber having a fiber cross section consisting of a portion composed of eight polystyrenes corresponding to the above and a fiber interior 2 in which the polystyrene corresponding to the micropores 4 is dispersed in 6 nylon.
【００２０】この複合繊維を１５０℃で３倍に延伸し、
繊度１.５デニール、繊維長３８mmにカットした。この
複合繊維１００％をカード法により繊維ウエブを形成し
た後、ニードルパンチすることにより、目付３００g/m2
の不織布を得た。その後、この不織布を５０℃のペルク
ロロエチレンに浸漬、搾液を繰り返してポリスチレン樹
脂成分を抽出除去し、目付７０g/m2、厚み０.２０mmの
電池用セパレータを得た。This conjugate fiber is drawn three times at 150 ° C.
It was cut to a fineness of 1.5 denier and a fiber length of 38 mm. A fiber web is formed from 100% of this composite fiber by a card method, and then needle punched to give a basis weight of 300 g / m 2.
Was obtained. Thereafter, the nonwoven fabric was immersed in perchlorethylene at 50 ° C. and squeezed repeatedly to extract and remove the polystyrene resin component, thereby obtaining a battery separator having a basis weight of 70 g / m 2 and a thickness of 0.20 mm.
【００２１】（実施例２）抽出用樹脂としてメルトイン
デックス２０のポリスチレン５０部、構成成分樹脂とし
て相対粘度２.３２の６ナイロン５０部をペレット状態
で混合し、押出機で溶融混練したポリマー融液と、抽出
用樹脂としてメルトインデックス２０のポリスチレン１
００部を押出機で溶融したポリマー融液とを、ギヤーポ
ンプで４０：６０の比率に計量した後、複合紡糸し、図
１(b)に示すような中空孔３に該当する８個のポリスチ
レンからなる扇形状部分と、微細孔４に該当するポリス
チレンが６ナイロン中に分散した繊維外周の外壁および
繊維中心部から放射状に伸びた分枝部の内壁からなる繊
維断面をもつ複合繊維を得た。(Example 2) A polymer melt obtained by mixing 50 parts of polystyrene having a melt index of 20 as an extraction resin and 50 parts of 6 nylon having a relative viscosity of 2.32 as a constituent resin in a pellet state and melt-kneading with an extruder. And polystyrene 1 having a melt index of 20 as an extraction resin
A polymer melt obtained by melting 00 parts with an extruder was measured at a ratio of 40:60 with a gear pump, and then subjected to composite spinning to obtain eight polystyrenes corresponding to the hollow holes 3 as shown in FIG. 1 (b). A composite fiber having a fiber cross section comprising a fan-shaped portion and an outer wall on the outer periphery of the fiber in which polystyrene corresponding to the micropores 4 is dispersed in 6 nylon and an inner wall of a branch portion radially extending from the center of the fiber was obtained.
【００２２】この繊維を９５℃の熱水中で３倍に延伸
し、繊度１.５デニール、繊維長３８mmにカットした。
この複合繊維１００％をカード法により繊維ウエブを形
成した後、ニードルパンチすることにより、目付３２０
g/m2の不織布を得た。その後、この不織布を９０℃の熱
ペルクロロエチレンに浸漬、搾液を繰り返してポリスチ
レン樹脂を抽出除去し、目付７０g/m2、厚み０.２０mm
の電池用セパレータを得た。The fiber was stretched three times in hot water at 95 ° C., and cut into a 1.5 denier fineness and a fiber length of 38 mm.
After forming a fiber web from the composite fiber 100% by a card method, the fiber weight is 320 by needle punching.
A g / m 2 nonwoven fabric was obtained. Thereafter, the nonwoven fabric was immersed in hot perchlorethylene at 90 ° C. and repeatedly squeezed to extract and remove the polystyrene resin. The basis weight was 70 g / m 2 and the thickness was 0.20 mm.
Was obtained.
【００２３】（比較例）６ナイロン５０部、ポリスチレ
ン５０部をペレット状態で混合し、押出機で溶融混練し
たポリマー融液を紡糸すると同時に、繊維断面における
中心からガスを吹き込み、中空繊維を得た。この中空繊
維を１５０℃で３倍延伸し、繊度１.５デニール、繊維
長３８mmにカットした。なお、この中空繊維の空孔率は
３０％であった。この中空繊維１００％をカード法によ
り繊維ウエブを形成した後、ニードルパンチすることに
より、目付１４０g/m2の不織布を得た。その後、不織布
を５０℃のペルクロロエチレンに浸漬、搾液を繰り返し
てポリスチレン樹脂を抽出除去し、目付７０g/m2、厚み
０.２０mmの電池用セパレータを得た。Comparative Example 6 50 parts of nylon and 50 parts of polystyrene were mixed in a pellet state, and a polymer melt melt-kneaded by an extruder was spun, and at the same time, a gas was blown from the center of the fiber cross section to obtain hollow fibers. . The hollow fiber was drawn three times at 150 ° C., and cut into a fineness of 1.5 denier and a fiber length of 38 mm. The porosity of this hollow fiber was 30%. A fiber web was formed from 100% of the hollow fibers by a card method, and then needle punched to obtain a nonwoven fabric having a basis weight of 140 g / m 2 . Thereafter, the nonwoven fabric was immersed in perchlorethylene at 50 ° C. and squeezed repeatedly to extract and remove the polystyrene resin, thereby obtaining a battery separator having a basis weight of 70 g / m 2 and a thickness of 0.20 mm.
【００２４】（繊維強度試験）実施例１、２及び比較例
と同様にして得られた複合繊維及び中空繊維の抽出用樹
脂を除去した繊維の繊維強度をＪＩＳ Ｌ−１０１５に
準ずる方法により測定した。この結果は表１に示す。(Fiber Strength Test) The fiber strength of the fibers obtained by removing the resin for extracting the composite fiber and hollow fiber obtained in the same manner as in Examples 1 and 2 and Comparative Example was measured by a method according to JIS L-1015. . The results are shown in Table 1.
【００２５】[0025]
【表１】 [Table 1]
【００２６】（厚みの減少率）実施例１、２及び比較例
の電池用セパレータに２kg/cm2荷重した時の厚みの減少
率を次の式に基づいて求めた。この結果も表１に示す。(Thickness Reduction Rate) The thickness reduction rate when a load of 2 kg / cm 2 was applied to the battery separators of Examples 1 and 2 and Comparative Example was determined based on the following equation. The results are also shown in Table 1.
【００２７】 [0027]
【００２８】（充電時の内部圧力測定）密閉型ニッケル
−カドミウム電池のセパレータとして、実施例１、２及
び比較例の電池用セパレータを使用し、水酸化カリウム
を主体とする電解液量３.２cc／mAh、温度０℃、２Ｃ充
電における内部圧力を、電池の上部に接続した圧力セン
サー（（株）共和電業 ＰＡＶ−２０ＫＧ）から測定す
る。この結果は図２に示す。(Measurement of Internal Pressure During Charging) As the separator of the sealed nickel-cadmium battery, the battery separators of Examples 1 and 2 and Comparative Example were used, and the amount of an electrolyte mainly composed of potassium hydroxide was 3.2 cc. / MAh, temperature 0 ° C., internal pressure at 2C charging is measured from a pressure sensor (Kyowa Dengyo PAV-20KG) connected to the upper part of the battery. The result is shown in FIG.
【００２９】[0029]
【発明の効果】本発明の電池用セパレータは従来の中空
繊維とは異なり、微細孔中空繊維を使用しているため、
電池製造時、或いは充放電時の圧力に対して抗すること
ができ、形状を保持することができるため、中空孔及び
微細孔により電解液を十分に保持することができる。According to the battery separator of the present invention, unlike conventional hollow fibers, microporous hollow fibers are used.
Since it can withstand the pressure at the time of battery production or charge and discharge and can maintain its shape, the electrolyte solution can be sufficiently held by the hollow holes and the fine holes.
【図１】（ａ） 本発明の電池用セパレータに使用でき
る、微細孔中空繊維の断面模式図の一例 （ｂ） 本発明の電池用セパレータに使用できる、微細
孔中空繊維の断面模式図の一例 （ｃ） 本発明の電池用セパレータに使用できる、微細
孔中空繊維の断面模式図の一例 （ｄ） 本発明の電池用セパレータに使用できる、微細
孔中空繊維の断面模式図の一例FIG. 1A is an example of a schematic cross-sectional view of microporous hollow fibers that can be used in the battery separator of the present invention. FIG. 1B is an example of a schematic cross-sectional view of microporous hollow fibers that can be used in the battery separator of the present invention. (C) An example of a schematic cross-sectional view of a microporous hollow fiber that can be used for the battery separator of the present invention (d) An example of a schematic cross-sectional view of a microporous hollow fiber that can be used for the battery separator of the present invention
【図２】本発明の電池用セパレータを密閉型ニッケル−
カドミウム電池のセパレータとして使用し、充電した時
の充電電気量と内部圧力との関係を表すグラフFIG. 2 shows a battery separator of the present invention using a sealed nickel-
Graph showing the relationship between the amount of electricity charged and the internal pressure when charged and used as a cadmium battery separator
１ 繊維表面 ２ 繊維内部 ３ 中空孔 ４ 微細孔 ５ 微細孔中空繊維 DESCRIPTION OF SYMBOLS 1 Fiber surface 2 Inside of fiber 3 Hollow hole 4 Micro hole 5 Micro hole hollow fiber
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−151965（ＪＰ，Ａ) 特開 昭56−145662（ＪＰ，Ａ) 特開 平４−174051（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 2/14 - 2/18 D04H 1/00 - 18/00 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-151965 (JP, A) JP-A-56-145662 (JP, A) JP-A-4-1744051 (JP, A) (58) Field (Int.Cl. 7 , DB name) H01M 2/14-2/18 D04H 1/00-18/00
Claims (1)
３を２つ以上有し、かつ少なくとも該中空孔３と繊維表
面１とが連通する微細孔４を有する微細孔中空繊維５を
主体として構成された繊維シートからなることを特徴と
する電池用セパレータ。1. A microporous hollow fiber 5 having two or more hollow holes 3 for dividing the fiber interior 2 in the longitudinal direction and having at least micropores 4 communicating with the hollow holes 3 and the fiber surface 1. A battery separator comprising a fiber sheet constituted as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04038676A JP3107174B2 (en) | 1992-01-29 | 1992-01-29 | Battery separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04038676A JP3107174B2 (en) | 1992-01-29 | 1992-01-29 | Battery separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05205720A JPH05205720A (en) | 1993-08-13 |
| JP3107174B2 true JP3107174B2 (en) | 2000-11-06 |
Family
ID=12531884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04038676A Expired - Fee Related JP3107174B2 (en) | 1992-01-29 | 1992-01-29 | Battery separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3107174B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07130347A (en) * | 1993-10-28 | 1995-05-19 | Ube Nitto Kasei Co Ltd | Battery separator |
| JP6195127B2 (en) | 2015-04-30 | 2017-09-13 | トヨタ自動車株式会社 | Secondary battery |
-
1992
- 1992-01-29 JP JP04038676A patent/JP3107174B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05205720A (en) | 1993-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101413349B1 (en) | Batteries including improved fine fiber separators | |
| JP6541002B2 (en) | Low shrinkage single layer lithium ion battery separator | |
| JP4699899B2 (en) | Separator material for alkaline secondary battery, method for producing the same, and separator for alkaline secondary battery | |
| JP2001155709A (en) | Separator for battery | |
| JPH1140129A (en) | Battery separator consisting of extra fine complex fiber nonwoven cloth and manufacture thereof | |
| JP3107174B2 (en) | Battery separator | |
| JP3678081B2 (en) | Battery separator and battery using the same | |
| JP2984561B2 (en) | Battery separator and manufacturing method thereof | |
| JP3226363B2 (en) | Alkaline battery separator | |
| JP4139454B2 (en) | Alkaline battery separator and method for producing the same | |
| JP5128035B2 (en) | Battery separator and battery using the same | |
| JP4601748B2 (en) | Battery separator | |
| JP3366426B2 (en) | Easy sulfonated fiber | |
| JP4410394B2 (en) | Battery separator | |
| JP3277186B2 (en) | Fiber sheet material and battery separator using the same | |
| JP2000133237A (en) | Cell separator and cell using same | |
| JP3277183B2 (en) | Alkaline battery separator | |
| JP4717260B2 (en) | Battery separator and battery | |
| JP4511019B2 (en) | Battery separator | |
| JP7313163B2 (en) | Separator for electrochemical device | |
| JP4058202B2 (en) | Alkaline battery | |
| JP4047412B2 (en) | Alkaline battery separator | |
| JPH11288702A (en) | Alkaline battery separator | |
| JP2001003254A (en) | Hydrophilic non-woven fabric, battery separator using the same and battery | |
| JP2005276842A (en) | Separator for battery and battery using it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080908 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090908 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100908 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100908 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110908 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |