JPH07263018A - Sealed alkaline storage battery - Google Patents
Sealed alkaline storage batteryInfo
- Publication number
- JPH07263018A JPH07263018A JP6079470A JP7947094A JPH07263018A JP H07263018 A JPH07263018 A JP H07263018A JP 6079470 A JP6079470 A JP 6079470A JP 7947094 A JP7947094 A JP 7947094A JP H07263018 A JPH07263018 A JP H07263018A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- polypropylene resin
- battery
- electrode sheet
- sulfonated polypropylene
- 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.)
- Granted
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
-
- 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
Landscapes
- Cell Separators (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はポリアミド樹脂製の不織
布シートをセパレータとして用いた密閉型アルカリ蓄電
池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed alkaline storage battery using a polyamide resin non-woven sheet as a separator.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来、
密閉型アルカリ蓄電池のセパレータとしては、一般にポ
リアミド樹脂製の不織布シートが用いられている。これ
は、ポリアミド樹脂は保液性が高く、電池内圧が急上昇
する充電末期又は過充電時に安全弁から電解液がリーク
（漏液）しにくいからである。2. Description of the Related Art Conventionally, the problems to be solved by the invention
A nonwoven fabric sheet made of polyamide resin is generally used as a separator of a sealed alkaline storage battery. This is because the polyamide resin has a high liquid-retaining property, and the electrolyte does not easily leak (leak) from the safety valve at the end of charging or when the battery is overcharged when the internal pressure of the battery rises sharply.
【０００３】しかしながら、ポリアミド樹脂製の不織布
シートをセパレータとして用いたアルカリ蓄電池には、
保存特性が良くないという問題がある。これは、ポリア
ミド樹脂中のアミド基が分解し、この分解により電解液
中に生成した硝酸イオン（ＮＯ3 - ）又は亜硝酸イオン
（ＮＯ2 - ）が、正極側で酸化され、負極側で還元され
るという反応が繰り返されること（シャトル効果）によ
り、自己放電が起こるためと言われている。However, in an alkaline storage battery using a polyamide resin non-woven sheet as a separator,
There is a problem that the storage characteristics are not good. It decomposes amide groups in the polyamide resin, nitrate ions generated by the decomposition during the electrolytic solution (NO 3 -) or nitrite ions (NO 2 -) is oxidized at the positive electrode side, the reduction at the negative electrode side It is said that self-discharge occurs due to the repeated reaction (shuttle effect).
【０００４】本発明は、上述の問題を解決するべくなさ
れたものであって、その目的とするところは、この種の
自己放電を抑制することにより保存特性に優れた密閉型
アルカリ蓄電池を提供するにある。The present invention has been made to solve the above problems, and an object thereof is to provide a sealed alkaline storage battery having excellent storage characteristics by suppressing this type of self-discharge. It is in.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
の本発明に係る密閉型アルカリ蓄電池（以下、「本発明
電池」と称する。）は、正極シートと負極シートとをセ
パレータとしてのポリアミド樹脂製の不織布シートを介
して渦巻き状に巻回してなる電極体と、安全弁とを備え
る密閉型アルカリ蓄電池であって、スルホン化ポリプロ
ピレン樹脂製の不織布シートがアルカリ電解液に濡れる
位置に配されてなる。A sealed alkaline storage battery according to the present invention (hereinafter referred to as "the battery of the present invention") for achieving the above object is a polyamide resin having a positive electrode sheet and a negative electrode sheet as separators. A sealed alkaline storage battery comprising an electrode body spirally wound through a non-woven fabric sheet made of, and a safety valve, wherein the non-woven fabric sheet made of sulfonated polypropylene resin is arranged at a position wetted by an alkaline electrolyte. .
【０００６】スルホン化ポリプロピレン樹脂製の不織布
シートを電池缶内に配する位置は、アルカリ電解液に濡
れる箇所であれば特に限定されない。具体的な配置方法
としては、例えば正極シートの巻き始め部又は負極シ
ートの巻き始め部（巻回基端部）を被覆するようにスル
ホン化ポリプロピレン樹脂製の不織布シートを折り曲げ
て配する方法、電極体の外周に巻き付けて配する方法
（これに代えて筒状の不織布シートを用いてもよい）、
電極タブ（正極シートのタブ又は負極シートのタブ）
と電極体との間の絶縁部材として従来用いられている塩
化ビニルシート、ポリプロピレンシート、ポリエチレン
シートなどに代えてスルホン化ポリプロピレン樹脂製の
不織布シートを用いる方法などが挙げられる。なかで
も、保存特性を大幅に改善する上で、及びの配置方
法が好ましい。図１、図２及び図３に、順に上記、
及びの配置方法を断面図にて模式的に示す。なお、各
図中の実質的に同じ部材については、同一の符号を付し
て示してある。The position at which the non-woven sheet made of sulfonated polypropylene resin is placed in the battery can is not particularly limited as long as it is wet with the alkaline electrolyte. As a specific arrangement method, for example, a method in which a nonwoven fabric sheet made of a sulfonated polypropylene resin is bent so as to cover the winding start portion of the positive electrode sheet or the winding start portion (winding base end portion) of the negative electrode sheet, the electrode A method of wrapping around the outer circumference of the body (a tubular nonwoven sheet may be used instead of this),
Electrode tab (positive electrode sheet tab or negative electrode sheet tab)
A method of using a non-woven sheet made of a sulfonated polypropylene resin in place of a vinyl chloride sheet, a polypropylene sheet, a polyethylene sheet or the like which has been conventionally used as an insulating member between the electrode body and the electrode body can be used. Above all, the arrangement methods of and are preferable in order to significantly improve the storage characteristics. In FIG. 1, FIG. 2 and FIG.
A method of arranging and is schematically shown in a sectional view. Note that substantially the same members in each drawing are denoted by the same reference numerals.
【０００７】図１に示すように、一方の電極シート（正
極シート又は負極シート）１の巻回基端部１ａを被覆す
るようにスルホン化ポリプロピレン樹脂製の不織布シー
ト２を配した場合は、巻回時に電極シート１の巻回基端
部１ａの角部がセパレータ３を突き破りにくくなるの
で、保存特性が改善される他、内部ショートの発生率が
低くなる。As shown in FIG. 1, when a non-woven fabric sheet 2 made of sulfonated polypropylene resin is arranged so as to cover the winding base end portion 1a of one electrode sheet (positive electrode sheet or negative electrode sheet) 1, Since the corners of the winding base end portion 1a of the electrode sheet 1 are less likely to pierce the separator 3 during rotation, the storage characteristics are improved and the occurrence rate of internal short circuit is reduced.
【０００８】図２に示すように、電極体４の外周面にス
ルホン化ポリプロピレン樹脂製の不織布シート２を配し
た場合は、保存特性が改善される他、電池缶内への電極
体４の収納が容易になる。As shown in FIG. 2, when the sulfonated polypropylene resin nonwoven fabric sheet 2 is arranged on the outer peripheral surface of the electrode body 4, the storage characteristics are improved and the electrode body 4 is housed in the battery can. Will be easier.
【０００９】図３に示すように、電極タブ５と電極体４
との間の絶縁部材として従来の塩化ビニルシートなどに
代えてスルホン化ポリプロピレン樹脂製の不織布シート
２を用いた場合は、保存特性改善効果は先の２例に比し
若干劣るものの、新たな部材を追加することなく、保存
特性を改善することが可能となる。As shown in FIG. 3, the electrode tab 5 and the electrode body 4 are
When a non-woven fabric sheet 2 made of a sulfonated polypropylene resin is used as an insulating member between and, instead of a conventional vinyl chloride sheet, the effect of improving the storage characteristics is slightly inferior to the above two examples, but a new member It is possible to improve the storage characteristics without adding.
【００１０】本発明においてスルホン化ポリプロピレン
樹脂製の不織布シートを電解液に濡れる位置に配する必
要があるのは、電解液中に溶存せる硝酸イオン又は亜硝
酸イオンを捕捉して自己放電の原因となるシャトル効果
を抑制するためには、スルホン化ポリプロピレン樹脂製
の不織布シートを電解液と接触させる必要があるからで
ある。In the present invention, the non-woven fabric sheet made of sulfonated polypropylene resin needs to be placed at a position where it is wet with the electrolytic solution because it is necessary to capture nitrate ions or nitrite ions dissolved in the electrolytic solution and cause self-discharge. This is because a non-woven sheet made of a sulfonated polypropylene resin needs to be brought into contact with the electrolytic solution in order to suppress the shuttle effect.
【００１１】本発明におけるスルホン化ポリプロピレン
樹脂製の不織布シートとしては、後述する実施例に示す
ように、分子内にイオウを０．１〜２．０重量％含有す
るスルホン化ポリプロピレン樹脂を用いたものが好適に
用いられる。As the non-woven sheet made of sulfonated polypropylene resin in the present invention, a sulfonated polypropylene resin containing 0.1 to 2.0% by weight of sulfur in the molecule is used as shown in Examples described later. Is preferably used.
【００１２】[0012]
【作用】セパレータとしてのポリアミド樹脂製の不織布
シート中のポリアミド樹脂が分解すると、電解液中に硝
酸イオン（ＮＯ3 - ）、亜硝酸イオン（ＮＯ2 - ）など
が生成するが、これらのイオンは、スルホン化ポリプロ
ピレン樹脂製の不織布シートに捕捉されて、極板間の移
動が阻止される。このため、シャトル効果に因る自己放
電が抑制される。[Action] When the polyamide resin of the polyamide resin nonwoven in the sheet as a separator is decomposed, nitrate ion (NO 3 -) in the electrolyte solution, nitrite ion (NO 2 -) but the like to produce, these ions , Captured by the non-woven sheet made of sulfonated polypropylene resin and prevented from moving between the electrode plates. Therefore, self-discharge due to the shuttle effect is suppressed.
【００１３】[0013]
【実施例】以下、本発明を実施例に基づいてさらに詳細
に説明するが、本発明は下記実施例により何ら限定され
るものではなく、その要旨を変更しない範囲において適
宜変更して実施することが可能なものである。EXAMPLES The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited by the examples described below, and various modifications may be made without departing from the scope of the invention. Is possible.
【００１４】〔密閉型アルカリ蓄電池の作製〕 （実施例１）市販のミッシュメタル（Ｍｍ）、ニッケ
ル、コバルト、アルミニウム及びマンガンを所定の割合
で秤量して混合し、アーク溶解炉を用いて溶融させた
後、冷却して、組成式：ＭｍＮｉ3.2 Ｃｏ1.0 Ａｌ0.6
Ｍｎ0.2 で表される水素吸蔵合金塊を得、この合金塊を
機械的に粉砕して平均粒径５０μｍの水素吸蔵合金粉末
を作製した。[Production of Sealed Alkaline Storage Battery] (Example 1) Commercially available misch metal (Mm), nickel, cobalt, aluminum and manganese were weighed and mixed at a predetermined ratio and melted using an arc melting furnace. After cooling, the composition formula: MmNi 3.2 Co 1.0 Al 0.6
A hydrogen storage alloy ingot represented by Mn 0.2 was obtained, and this alloy ingot was mechanically pulverized to prepare a hydrogen storage alloy powder having an average particle size of 50 μm.
【００１５】次いで、この水素吸蔵合金粉末１００重量
部に、０．５重量部のポリエチレンオキシドと分散媒と
しての水を加えて混練し、スラリーを調製した。Next, to 100 parts by weight of this hydrogen storage alloy powder, 0.5 parts by weight of polyethylene oxide and water as a dispersion medium were added and kneaded to prepare a slurry.
【００１６】このスラリーを容器に流し込み、そのスラ
リー中にニッケルめっきしたパンチングメタルからなる
導電性の支持体を通過させて該支持体の両面に前記スラ
リーを塗布した後、乾燥し、加圧成形して、負極シート
を作製した。The slurry is poured into a container, and a conductive support made of punched metal plated with nickel is passed through the slurry to apply the slurry on both sides of the support, followed by drying and pressure molding. To prepare a negative electrode sheet.
【００１７】上記負極シートと、先の図１に示す如くス
ルホン化ポリプロピレン樹脂製の不織布シート（幅４４
ｍｍ、長さ１０ｍｍ；スルホン化ポリプロピレン樹脂の
イオウ含有率：０．５重量％）で巻き始め部（巻回基端
部）を被覆した公知の焼結式ニッケル極（正極シート）
とをポリアミド樹脂製の不織布からなるセパレータを介
して渦巻き状に巻回して電極体とし、この電極体の外周
にポリアミド樹脂製の不織布シートを巻き付けた後、円
筒状の負極缶内に収納してＡＡサイズの本発明電池Ａ１
（理論容量：１０００ｍＡｈ）を組み立てた。電極体と
正極タブとの間に、先の図３に示すように、絶縁部材と
しての塩化ビニル樹脂製の絶縁シートを配した。The negative electrode sheet and a non-woven sheet made of sulfonated polypropylene resin (width 44) as shown in FIG.
mm, length 10 mm; sulfur content of sulfonated polypropylene resin: 0.5% by weight), a known sintered nickel electrode (positive electrode sheet) coated with a winding start portion (winding base end portion).
And a spirally wound electrode body through a separator made of polyamide resin non-woven fabric to form an electrode body, and after winding a polyamide resin non-woven fabric sheet around the outer periphery of this electrode body, store it in a cylindrical negative electrode can. AA size battery A1 of the present invention
(Theoretical capacity: 1000 mAh) was assembled. As shown in FIG. 3, an insulating sheet made of vinyl chloride resin was arranged as an insulating member between the electrode body and the positive electrode tab.
【００１８】（実施例２）巻き始め部をスルホン化ポリ
プロピレン樹脂製の不織布シートに代えてポリアミド樹
脂製の不織布シートで被覆したこと、及び、電極体の外
周に、ポリアミド樹脂製の不織布シートに代えてスルホ
ン化ポリプロピレン樹脂（イオウ含有率：０．５重量
％）製の不織布シートを巻き付けたこと以外は実施例１
と同様にして、本発明電池Ａ２を組み立てた。Example 2 The beginning of winding was covered with a polyamide resin non-woven sheet instead of the sulfonated polypropylene resin non-woven sheet, and the outer periphery of the electrode body was replaced with a polyamide resin non-woven sheet. Example 1 except that a non-woven sheet made of sulfonated polypropylene resin (sulfur content: 0.5% by weight) was wound around
The battery A2 of the invention was assembled in the same manner as in.
【００１９】（実施例３）巻き始め部をスルホン化ポリ
プロピレン樹脂製の不織布シートに代えてポリアミド樹
脂製の不織布シートで被覆したこと、及び、電極体と正
極タブとの絶縁部材として、塩化ビニル樹脂製のシート
に代えてスルホン化ポリプロピレン樹脂（イオウ含有
率：０．５重量％）製の不織布シートを用いたこと以外
は実施例１と同様にして、本発明電池Ａ３を組み立て
た。(Example 3) A winding start portion was covered with a polyamide resin non-woven sheet instead of the sulfonated polypropylene resin non-woven sheet, and a vinyl chloride resin was used as an insulating member between the electrode body and the positive electrode tab. A battery A3 of the invention was assembled in the same manner as in Example 1 except that a non-woven fabric sheet made of a sulfonated polypropylene resin (sulfur content: 0.5% by weight) was used instead of the sheet made of.
【００２０】（比較例１）巻き始め部をスルホン化ポリ
プロピレン樹脂製の不織布シートに代えてポリアミド樹
脂製の不織布シートで被覆したこと以外は実施例１と同
様にして、比較電池Ｂ１を組み立てた。(Comparative Example 1) A comparative battery B1 was assembled in the same manner as in Example 1 except that the non-woven fabric sheet made of sulfonated polypropylene resin was used instead of the non-woven fabric sheet made of sulfonated polypropylene.
【００２１】（比較例２）セパレータとしてポリアミド
樹脂製の不織布に代えてスルホン化ポリプロピレン樹脂
（イオウ含有率：０．５重量％）製の不織布を用いたこ
と、及び、電極体の外周にポリアミド樹脂製の不織布シ
ートに代えてスルホン化ポリプロピレン樹脂（イオウ含
有率：０．５重量％）製の不織布を巻き付けたこと以外
は実施例１と同様にして、比較電池Ｂ２を組み立てた。(Comparative Example 2) A non-woven fabric made of sulfonated polypropylene resin (sulfur content: 0.5% by weight) was used as the separator instead of the non-woven fabric made of polyamide resin, and the polyamide resin was formed on the outer periphery of the electrode body. A comparative battery B2 was assembled in the same manner as in Example 1 except that a sulfonated polypropylene resin (sulfur content: 0.5% by weight) non-woven fabric was wound in place of the non-woven fabric sheet.
【００２２】本発明電池Ａ１〜Ａ３及び比較電池Ｂ１，
Ｂ２を組み立てる際に用いたセパレータ、正極の巻き始
め部の被覆部材、電極体外周の被覆部材及び電極体と正
極タブとの間の絶縁部材を、表１にまとめて示す。Inventive batteries A1 to A3 and comparative battery B1,
Table 1 collectively shows the separator used for assembling B2, the covering member at the winding start portion of the positive electrode, the covering member on the outer periphery of the electrode body, and the insulating member between the electrode body and the positive electrode tab.
【００２３】[0023]
【表１】 [Table 1]
【００２４】〔初期の放電容量〕本発明電池Ａ１〜Ａ３
及び比較電池Ｂ１，Ｂ２について、０．１Ｃで１２時間
充電した後、０．１Ｃで１Ｖまで放電して、初期の放電
容量Ｄ１を調べた。結果を表２に示す。[Initial discharge capacity] Batteries A1 to A3 of the present invention
The comparative batteries B1 and B2 were charged at 0.1 C for 12 hours, then discharged to 0.1 V at 0.1 C, and the initial discharge capacity D1 was examined. The results are shown in Table 2.
【００２５】〔保存後の残存容量〕各電池について、
０．１Ｃで１２時間充電し、２０°Ｃで３０日間保存し
た後、０．１Ｃで１Ｖまで放電して、３０日間保存後の
残存容量Ｄ２を調べた。結果を表２に示す。[Remaining capacity after storage] For each battery,
The battery was charged at 0.1 C for 12 hours, stored at 20 ° C. for 30 days, discharged at 0.1 C to 1 V, and the remaining capacity D2 after storage for 30 days was examined. The results are shown in Table 2.
【００２６】〔保存後の放電容量〕残存容量Ｄ２を調べ
た後、さらに０．１Ｃで１２時間充電した後、０．１Ｃ
で１Ｖまで放電して、保存後の放電容量Ｄ３を調べた。
結果を表２に示す。[Discharge capacity after storage] After checking the remaining capacity D2, the battery was further charged at 0.1 C for 12 hours and then discharged at 0.1 C.
The discharge capacity D3 after storage was examined by discharging to 1 V at.
The results are shown in Table 2.
【００２７】〔過充電試験〕各電池（安全弁の開放作動
圧：１５ｋｇ／ｃｍ2 ）について、１Ｃで２．５時間充
電して、過充電時の安全弁からの電解液のリークの有無
を調べた。電解液のリークの有無は、充電後に安全弁の
近傍にフェノールフタレイン溶液を滴下してその着色の
有無より調べた。結果を表２に示す。[Overcharge Test] Each battery (safety valve opening operating pressure: 15 kg / cm 2 ) was charged at 1 C for 2.5 hours, and the presence or absence of electrolyte leakage from the safety valve during overcharge was examined. . The presence or absence of leakage of the electrolytic solution was examined by dropping a phenolphthalein solution near the safety valve after charging and checking the presence or absence of the coloring. The results are shown in Table 2.
【００２８】[0028]
【表２】 [Table 2]
【００２９】表２に示すように、本発明電池Ａ1 〜Ａ３
では保存後の残存容量Ｄ２が大きいのに対して、比較電
池Ｂ１では保存後の残存容量Ｄ２が小さい。このことか
ら、正極の巻き始め部の被覆部材及び電極体外周の被覆
部材として従来用いられているポリアミド樹脂製の不織
布シート、又は、電極体と正極タブとの間の絶縁部材と
して従来用いられている塩化ビニル樹脂製の絶縁シート
に代えて、スルホン化ポリプロピレン樹脂製の不織布シ
ートを用いることにより、自己放電が有効に抑制されて
保存特性が顕著に向上することが分かる。また、セパレ
ータをスルホン化ポリプロピレン樹脂製の不織布シート
で構成した比較電池Ｂ２では保存後の残存容量Ｄ２は大
きいものの、セパレータの電解液保液性が良くないため
に、過充電時に電解液のリークが起こっている。As shown in Table 2, the batteries of the present invention A1 to A3
The remaining capacity D2 after storage is large, whereas the remaining capacity D2 after storage is small in the comparative battery B1. From this, a non-woven fabric sheet made of a polyamide resin that is conventionally used as a covering member for the winding start portion of the positive electrode and a covering member for the outer periphery of the electrode body, or conventionally used as an insulating member between the electrode body and the positive electrode tab. It can be seen that by using a non-woven fabric sheet made of sulfonated polypropylene resin instead of the insulating sheet made of vinyl chloride resin, self-discharge is effectively suppressed and the storage characteristics are remarkably improved. Further, in Comparative Battery B2 in which the separator is made of a non-woven sheet made of sulfonated polypropylene resin, although the residual capacity D2 after storage is large, the electrolyte retaining property of the separator is not good, and therefore the electrolyte leaks during overcharging. is happening.
【００３０】これらの結果から、セパレータとして、電
解液の保持性（保液性）に優れるポリアミド樹脂製の不
織布シートを用いるとともに、そのポリアミド樹脂の分
解に起因する自己放電を抑制するためにスルホン化ポリ
プロピレン樹脂製の不織布シートをアルカリ電解液に濡
れる位置に配することにより、過充電時に電解液のリー
クが起こらず、しかも保存特性に優れた密閉型アルカリ
蓄電池が得られることが分かる。From these results, a non-woven fabric sheet made of polyamide resin having excellent electrolyte retaining property (liquid retaining property) is used as a separator, and sulfonated in order to suppress self-discharge due to decomposition of the polyamide resin. It can be seen that the non-woven fabric sheet made of polypropylene resin is placed at a position where it is wet with the alkaline electrolyte, and the electrolyte does not leak during overcharge, and a sealed alkaline storage battery having excellent storage characteristics can be obtained.
【００３１】上記実施例１では、正極の巻き始め部の被
覆部材にスルホン化ポリプロピレン樹脂製の不織布シー
トを用いる例について説明したが、負極の巻き始め部の
被覆部材に用いた場合にも同様の効果が得られることを
確認した。In Example 1 above, an example in which a nonwoven fabric sheet made of a sulfonated polypropylene resin is used as the covering member at the winding start portion of the positive electrode has been described, but the same applies to the case where it is used as the covering member at the winding start portion of the negative electrode. It was confirmed that the effect was obtained.
【００３２】また、上記実施例では、密閉型ニッケル−
水素アルカリ蓄電池を例に挙げて説明したが、本発明は
安全弁を備える密閉型アルカリ蓄電池に広く適用し得る
ものである。Further, in the above embodiment, the sealed nickel-type
Although the hydrogen alkaline storage battery has been described as an example, the present invention can be widely applied to a sealed alkaline storage battery including a safety valve.
【００３３】[0033]
【発明の効果】セパレータとして電解液保液性に優れる
ポリアミド樹脂製の不織布シートが用いられているの
で、充電末期又は過充電時に電解液のリークが起こりに
くいとともに、ポリアミド樹脂の分解生成物である硝酸
イオンなどの電解液中での移動が、電解液に濡れる位置
に配されたスルホン化ポリプロピレン樹脂製の不織布シ
ートにより阻止され、自己放電しにくくなっているので
保存特性に優れる。EFFECT OF THE INVENTION Since a nonwoven fabric sheet made of a polyamide resin having excellent electrolyte retaining property is used as a separator, the electrolyte is less likely to leak at the end of charging or during overcharging, and is a decomposition product of the polyamide resin. Movement of nitrate ions and the like in the electrolytic solution is blocked by the sulfonated polypropylene resin non-woven sheet placed at a position wetted by the electrolytic solution, and self-discharge is less likely to occur, resulting in excellent storage characteristics.
【図１】電極シートの巻回基端部を被覆するようにスル
ホン化ポリプロピレン樹脂製の不織布シートを配した場
合の部分断面図である。FIG. 1 is a partial cross-sectional view of a case where a nonwoven fabric sheet made of a sulfonated polypropylene resin is arranged so as to cover a winding base end portion of an electrode sheet.
【図２】電極体の外周にスルホン化ポリプロピレン樹脂
製の不織布シートを巻き付けた場合の平面断面図であ
る。FIG. 2 is a plan sectional view of a non-woven fabric sheet made of a sulfonated polypropylene resin wound around the outer periphery of an electrode body.
【図３】正極タブと電極体との間の絶縁シートとしてス
ルホン化ポリプロピレン樹脂製の不織布シートを配した
場合の一部切り欠き正面断面図である。FIG. 3 is a partially cutaway front sectional view of a case where a non-woven fabric sheet made of sulfonated polypropylene resin is arranged as an insulating sheet between a positive electrode tab and an electrode body.
１ 電極シート（正極シート又は負極シート） １ａ 巻回基端部 ２ スルホン化ポリプロピレン樹脂製の不織布シート ３ セパレータ ４ 電極体 ５ 電極タブ DESCRIPTION OF SYMBOLS 1 Electrode sheet (positive electrode sheet or negative electrode sheet) 1a Winding base end portion 2 Nonwoven sheet made of sulfonated polypropylene resin 3 Separator 4 Electrode body 5 Electrode tab
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西尾 晃治 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 斎藤 俊彦 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 ─────────────────────────────────────────────────── --- Continuation of front page (72) Inventor Koji Nishio 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Toshihiko Saito 2-5 Keihan-hondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd.
Claims (4)
してのポリアミド樹脂製の不織布シートを介して渦巻き
状に巻回してなる電極体を電池缶内に収納してなる、安
全弁を備えた密閉型アルカリ蓄電池であって、スルホン
化ポリプロピレン樹脂製の不織布シートがアルカリ電解
液に濡れる位置に配されていることを特徴とする密閉型
アルカリ蓄電池。1. A sealed alkali having a safety valve, wherein an electrode body formed by spirally winding a positive electrode sheet and a negative electrode sheet through a polyamide resin non-woven sheet as a separator is housed in a battery can. A sealed alkaline storage battery, wherein the nonwoven fabric sheet made of a sulfonated polypropylene resin is arranged at a position wetted with an alkaline electrolyte.
してのポリアミド樹脂製の不織布シートを介して渦巻き
状に巻回してなる電極体を電池缶内に収納してなる、安
全弁を備えた密閉型アルカリ蓄電池であって、前記正極
シートの巻き始め部又は前記負極シートの巻き始め部
が、スルホン化ポリプロピレン樹脂製の不織布シートで
被覆されていることを特徴とする密閉型アルカリ蓄電
池。2. A hermetically sealed alkali provided with a safety valve, wherein an electrode body formed by spirally winding a positive electrode sheet and a negative electrode sheet through a nonwoven fabric sheet made of polyamide resin as a separator is housed in a battery can. A sealed alkaline storage battery, wherein the winding start portion of the positive electrode sheet or the winding start portion of the negative electrode sheet is covered with a nonwoven fabric sheet made of a sulfonated polypropylene resin.
してのポリアミド樹脂製の不織布シートを介して渦巻き
状に巻回してなる電極体を電池缶内に収納してなる、安
全弁を備えた密閉型アルカリ蓄電池であって、前記電極
体の外周にスルホン化ポリプロピレン樹脂製の不織布シ
ートが配されていることを特徴とする密閉型アルカリ蓄
電池。3. A sealed alkali having a safety valve, wherein an electrode body formed by spirally winding a positive electrode sheet and a negative electrode sheet through a polyamide resin non-woven sheet as a separator is housed in a battery can. A sealed alkaline storage battery, which is a storage battery in which a non-woven fabric sheet made of a sulfonated polypropylene resin is arranged around the electrode body.
してのポリアミド樹脂製の不織布シートを介して渦巻き
状に巻回してなる電極体を電池缶内に収納してなる、安
全弁を備えた密閉型アルカリ蓄電池であって、前記正極
シートのタブ又は前記負極シートのタブと前記電極体と
の間の絶縁部材として、スルホン化ポリプロピレン樹脂
製の不織布シートが用いられていることを特徴とする密
閉型アルカリ蓄電池。4. A hermetically sealed alkali provided with a safety valve, wherein an electrode body formed by spirally winding a positive electrode sheet and a negative electrode sheet through a nonwoven fabric sheet made of polyamide resin as a separator is housed in a battery can. A sealed alkaline storage battery, which is a storage battery, wherein a nonwoven fabric sheet made of a sulfonated polypropylene resin is used as an insulating member between the tab of the positive electrode sheet or the tab of the negative electrode sheet and the electrode body. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07947094A JP3326274B2 (en) | 1994-03-25 | 1994-03-25 | Sealed alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07947094A JP3326274B2 (en) | 1994-03-25 | 1994-03-25 | Sealed alkaline storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07263018A true JPH07263018A (en) | 1995-10-13 |
| JP3326274B2 JP3326274B2 (en) | 2002-09-17 |
Family
ID=13690782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07947094A Expired - Fee Related JP3326274B2 (en) | 1994-03-25 | 1994-03-25 | Sealed alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3326274B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014157674A (en) * | 2013-02-14 | 2014-08-28 | Shonan Corun Energy Co Ltd | Alkali storage battery |
| JP2015069887A (en) * | 2013-09-30 | 2015-04-13 | 株式会社Ｇｓユアサ | Alkaline storage battery and method for manufacturing alkaline storage battery |
| JP2015153621A (en) * | 2014-02-14 | 2015-08-24 | 湘南Ｃｏｒｕｎ Ｅｎｅｒｇｙ株式会社 | Alkaline storage battery |
-
1994
- 1994-03-25 JP JP07947094A patent/JP3326274B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014157674A (en) * | 2013-02-14 | 2014-08-28 | Shonan Corun Energy Co Ltd | Alkali storage battery |
| JP2015069887A (en) * | 2013-09-30 | 2015-04-13 | 株式会社Ｇｓユアサ | Alkaline storage battery and method for manufacturing alkaline storage battery |
| US9899653B2 (en) | 2013-09-30 | 2018-02-20 | Gs Yuasa International Ltd. | Alkaline storage battery, and method for producing alkaline storage battery |
| JP2015153621A (en) * | 2014-02-14 | 2015-08-24 | 湘南Ｃｏｒｕｎ Ｅｎｅｒｇｙ株式会社 | Alkaline storage battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3326274B2 (en) | 2002-09-17 |
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