JPH11142339A - Analysis of capacity of separator for battery - Google Patents
Analysis of capacity of separator for batteryInfo
- Publication number
- JPH11142339A JPH11142339A JP32947197A JP32947197A JPH11142339A JP H11142339 A JPH11142339 A JP H11142339A JP 32947197 A JP32947197 A JP 32947197A JP 32947197 A JP32947197 A JP 32947197A JP H11142339 A JPH11142339 A JP H11142339A
- Authority
- JP
- Japan
- Prior art keywords
- sample
- color
- hydrophilic group
- dye
- 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.)
- Granted
Links
Landscapes
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池用セパレータ
の主として品質管理や工程管理等に適用できる、電池用
セパレータの性能分析方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for analyzing the performance of a battery separator which can be mainly applied to quality control and process control of a battery separator.
【０００２】[0002]
【従来の技術】一般に、Ｎｉ−Ｃｄ，Ｎｉ−ＭＨ等のア
ルカリ二次電池用のセパレータには、化学的安定性に優
れたオレフィン系繊維の不織布シートやオレフィン系樹
脂に、グラフト重合やスルフォン化処理等の親水化処理
を施したものやイオン交換性微粉体を付着したものが用
いられている。上記セパレータには、高温における耐ア
ルカリ性・耐酸化性、電解液保持性、高いイオン交換容
量等の諸性能が要求され、また電池に組み込んだときの
性能として、高率充放電特性・自己放電特性・サイクル
寿命特性が要求されている。2. Description of the Related Art Generally, a separator for an alkaline secondary battery such as Ni-Cd or Ni-MH is graft-polymerized or sulfonated on a nonwoven fabric sheet of an olefin fiber having excellent chemical stability or an olefin resin. What has been subjected to a hydrophilic treatment such as a treatment or a substance to which an ion-exchange fine powder is attached is used. The above separators are required to have various properties such as alkali resistance and oxidation resistance at high temperatures, electrolyte retention, high ion exchange capacity, etc., and when incorporated into batteries, high-rate charge / discharge characteristics and self-discharge characteristics・ Cycle life characteristics are required.
【０００３】そこで、従来セパレータの性能として、耐
アルカリ性は、セパレータ試料を、例えば３０％ＫＯＨ
液に８０℃×７日間浸漬して、試験前後の重量減比で測
定し、また電解液保持性は、セパレータ試料を、例えば
３０％ＫＯＨ液に１０分間浸漬して、試験前後の重量増
比で測定して分析している。また、セパレータのイオン
交換容量は、親水基のイオン交換容量滴定によって行っ
ている。また、セパレータを電池に組み込んだときの性
能は、試験用の電池を作製し、この電池の充放電試験を
行って、高率充放電特性・自己放電特性・サイクル寿命
特性の物性値を測定している。また、イオン交換性微粉
体を付着したセパレータの付着量は、原反に付着した樹
脂を脱落させてその重量を測定している。Therefore, as a performance of a conventional separator, the alkali resistance is determined by, for example, using 30% KOH.
The separator was immersed in a solution at 80 ° C. for 7 days and measured at a weight loss ratio before and after the test. Is measured and analyzed. The ion exchange capacity of the separator is determined by ion exchange capacity titration of a hydrophilic group. In addition, the performance when the separator was incorporated into the battery was determined by preparing a test battery, conducting a charge / discharge test on this battery, and measuring the physical properties of high-rate charge / discharge characteristics, self-discharge characteristics, and cycle life characteristics. ing. The weight of the separator to which the ion-exchangeable fine powder is attached is determined by removing the resin attached to the raw material and measuring the weight thereof.
【０００４】上記従来の分析方法によるときは、非常に
多くの手数を要するばかりか、長い日数を要しているの
が実情であり、セパレータの性能を簡単に分析する方法
がなかった。[0004] In the above conventional analysis method, not only a very large number of troubles but also a long time is required, and there is no method for simply analyzing the performance of the separator.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、親水化処理
又はイオン交換能を付与したセパレータの性能を、簡単
な方法によって短時間で分析可能にし、主としてセパレ
ータ製品の品質管理や工程管理等に適用可能にすること
を課題とする。SUMMARY OF THE INVENTION The present invention makes it possible to analyze the performance of a separator provided with a hydrophilic treatment or an ion exchange ability in a short time by a simple method, and is mainly used for quality control and process control of separator products. The task is to make it applicable.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明の電池用セパレータの性能分析方法は、親水
化処理又はイオン交換能を付与したセパレータの親水基
に着目してなしたものであり、セパレータの試料をイオ
ン結合可能な染料で以て染色し、試料中の親水基を発色
させることを特徴とする。In order to achieve the above object, a method for analyzing the performance of a battery separator according to the present invention focuses on a hydrophilic group of a separator provided with a hydrophilic treatment or an ion exchange ability. Yes, the method is characterized in that a sample of the separator is stained with a dye capable of binding ions to develop a hydrophilic group in the sample.
【０００７】この手段によれば、試料中の親水基がその
ｐＨの大小によって特有の色彩に発色される。従って、
試料の発色状態（色彩のバラツキやムラ）によって、試
料中の親水基の分布状況を判別して、親水基やイオン交
換樹脂の付着の均一性が検知される。また、発色された
試料の色相が、例えば試料中の親水基がスルフォン基で
あれば赤色に発色し、親水基のｐＨの大小により濃い赤
になったり、薄いピンクに変化にするので、試料中の親
水基の種類を判別して、親水化処理の方法が特定され
る。According to this means, the hydrophilic group in the sample is colored in a specific color depending on the magnitude of its pH. Therefore,
The distribution state of the hydrophilic groups in the sample is determined based on the color development state (color variation and unevenness) of the sample, and the uniformity of adhesion of the hydrophilic groups and the ion exchange resin is detected. Also, if the hue of the color-developed sample is red, for example, if the hydrophilic group in the sample is a sulfone group, the color becomes red, and the color of the hydrophilic group becomes darker red or changes to light pink depending on the pH of the hydrophilic group. The type of the hydrophilic group is determined, and the method of the hydrophilic treatment is specified.
【０００８】また、発色された試料の色彩は、試料中の
親水基の量の増減によって変化するので、発色された色
彩と予め設定した基準色彩との色差を求め、この偏差値
によって、試料中の親水基導入量を定量的に判別するこ
とができる。ところで、上記色差は、試料の色彩と基準
色彩とを、例えば色彩色差計によって計測して、色の三
属性と呼ばれる、色相・明度・彩度の要素をＬ* ａ* ｂ
* 表色系による物体色の表示方法（ＪＩＳ Ｚ ８７２
９−１９８０）で数値化して測定することができる。Further, the color of the color-developed sample changes depending on the increase or decrease of the amount of the hydrophilic group in the sample. Therefore, the color difference between the color developed and the preset reference color is determined, and the deviation value is used to calculate the color difference in the sample. Can be quantitatively determined. By the way, the color difference is obtained by measuring the color of the sample and the reference color by, for example, a colorimeter, and calculating the hue, lightness, and saturation elements called L * a * b, which are called three attributes of color.
* Display method of object color by color system (JIS Z872)
9-1980) and can be measured.
【０００９】さらに、親水化処理又はイオン交換能を付
与した、疎水性繊維から成る電池用セパレータの試料を
用いて、セパレータの耐薬品性試験又は電池のサイクル
寿命試験を行った後に、上記試料をイオン結合可能な染
料の溶液で以て染色し、試料の発色状態によって、試料
中の親水基の劣化状況を判別して、親水基の外れ易さが
検知される。例えばアクリル酸グラフト重合処理したセ
パレータでは、反応時間が増加すると、濃い紫色から薄
い紫色に変化しており、過度な酸化条件下でカルボキシ
ル基が外れたことを検知することができ、また、サイク
ル数が増加するにつれて色あせていき、特に正極側の色
落ちが激しく、色落ちが電極の縁から始まることを検知
することができる。Further, using a sample of a battery separator made of a hydrophobic fiber provided with a hydrophilizing treatment or an ion-exchange ability, a chemical resistance test of the separator or a cycle life test of the battery is performed, and then the sample is subjected to The sample is stained with a solution of a dye capable of ion-bonding, the state of deterioration of the hydrophilic group in the sample is determined based on the color development state of the sample, and the tendency of the hydrophilic group to come off is detected. For example, in the case of an acrylic acid graft polymerization-treated separator, as the reaction time increases, the color changes from dark purple to light purple, and it can be detected that the carboxyl group has been removed under excessive oxidation conditions. It is possible to detect that the color fades as the value increases and that the color fading on the positive electrode side is particularly severe and that the color fading starts from the edge of the electrode.
【００１０】上記イオン結合可能な染料としては、カチ
オン染料又は酸性染料が好ましい。また、上記イオン結
合可能な染料は、その溶液にギ酸、酢酸等を適量添加し
て、そのｐＨを調整して、試料中の官能基との結合力を
調整して発色させることによって、発色された試料の色
の三属性（色相・明度・彩度）の変化をより一層明瞭に
することができる。As the dye capable of ion-bonding, a cationic dye or an acidic dye is preferable. The dye capable of ion binding is colored by adding an appropriate amount of formic acid, acetic acid, or the like to the solution, adjusting the pH thereof, and adjusting the bonding force with the functional group in the sample to form a color. The changes in the three attributes (hue, lightness, and saturation) of the color of the sample can be further clarified.
【００１１】ところで、上記電池用セパレータの性能分
析方法は、電池用セパレータの製造工程において、ロッ
ト毎にセパレータの端末に染色し、発色された色彩と基
準データとの色差を求めて、この色差によって親水基や
イオン交換樹脂微粉体の付着量を検出し、この検出値と
予め設定した基準付着量との偏差を求め、この偏差値に
よってイオン交換樹脂微粉体の付着量を制御することに
より、電池用セパレータのイオン交換樹脂微粉体の付着
量を制御するのに、適用することができる。By the way, in the method of analyzing the performance of the battery separator, in the manufacturing process of the battery separator, the terminal of the separator is dyed for each lot, and the color difference between the developed color and the reference data is obtained. By detecting the amount of adhesion of hydrophilic groups or ion exchange resin fine powder, calculating the deviation between this detection value and a preset reference adhesion amount, and controlling the amount of adhesion of ion exchange resin fine powder by this deviation value, the battery It can be applied to control the amount of the ion-exchange resin fine powder attached to the separator for use.
【００１２】[0012]
【発明の実施の形態】次に、本発明の電池用セパレータ
の性能分析方法を詳細に説明する。各種親水化処理を施
された電池用セパレータとイオン交換能を付与した電池
用セパレータの各種試料を準備した。次に、加温して均
一に溶解して沸騰した染料（例えば、カチオン染料）の
溶液に、上記各種試料を浸漬して、温度ムラを防ぐた
め、一定時間攪拌して煮沸した後、水洗し、乾燥した。
各種試料は、親水基の種類によって発色していた。Next, a method for analyzing the performance of a battery separator according to the present invention will be described in detail. Various samples of a battery separator subjected to various hydrophilic treatments and a battery separator provided with an ion exchange ability were prepared. Next, the above-mentioned various samples are immersed in a solution of a dye (for example, a cationic dye) that has been heated and uniformly dissolved and boiled. And dried.
Various samples were colored depending on the type of hydrophilic group.
【００１３】本発明に用いるイオン結合可能な染料とし
て、カチオン染料としては、第４級アンモニュウムが染
料分子共役系の中に存在する共役型カチオン染料と第４
級アンモニュウムが染料分子共役系の外に存在して水溶
性に寄与する絶縁型カチオン染料とがあるが、色相が鮮
明で、着色力が大きい共役型の方が好ましい。また、酸
性染料としては、染色ｐＨ２〜４に適する均染型（レベ
リングタイプ）、染色ｐＨ４〜５に適する堅牢型（ファ
ーストタイプ）、染色ｐＨ６〜７に適するミーリング型
（ミーリングタイプ）を用いることができる。As the dye capable of ion bonding used in the present invention, as the cationic dye, quaternary ammonium is used as a conjugated cationic dye existing in a dye molecule conjugated system.
There is an insulated cationic dye which exists outside the dye molecule conjugated system and contributes to water solubility, but a conjugated type having a clear hue and a large coloring power is preferable. In addition, as the acidic dye, a level dyeing type (leveling type) suitable for dyeing pH 2 to 4, a fast type (fast type) suitable for dyeing pH 4 to 5, and a milling type (milling type) suitable for dyeing pH 6 to 7 may be used. it can.
【００１４】また、試料中の親水基が判明しているとき
には、染料溶液のｐＨを試料中の親水基の等電点付近
に、例えば、スルフォン基はｐＨ２〜３、カルボキシル
基はｐＨ５〜６、水酸基はｐＨ８〜９に調整すると、試
料中の親水基をより一層明瞭に染色することができる。When the hydrophilic group in the sample is known, the pH of the dye solution is set to around the isoelectric point of the hydrophilic group in the sample. For example, the sulfone group has a pH of 2 to 3, the carboxyl group has a pH of 5 to 6, When the hydroxyl group is adjusted to pH 8 to 9, the hydrophilic group in the sample can be more clearly stained.
【００１５】また、試料中の親水基が強酸性のスルフォ
ン基のときには赤色染料（カチオン染料）を、弱酸性の
カルボキシル基のときには青色染料（酸性染料）のよう
に、試料中の親水基の種類によって、染料を使い分ける
と、試料中の親水基をより一層明瞭に染色することがで
きる。When the hydrophilic group in the sample is a strongly acidic sulfone group, a red dye (cationic dye) is used. When the hydrophilic group is a weakly acidic carboxyl group, a blue dye (acid dye) is used. By using different dyes, the hydrophilic group in the sample can be more clearly stained.
【００１６】本発明において、染料は、０．３ｇ〜１．
０ｇを１００倍の蒸留水で、溶解温度６０℃〜７０℃で
溶解すると、均一に溶解されるので、好ましい。In the present invention, the dye is used in an amount of 0.3 g to 1.g.
It is preferable to dissolve 0 g with 100 times the volume of distilled water at a dissolution temperature of 60 ° C. to 70 ° C., since it is uniformly dissolved.
【００１７】ところで、上記実施の形態において、各種
試料を染料溶液中に入れて一定時間煮沸して染色した
が、単一の試料のときには均一に溶解した染料溶液中に
浸漬することにより試料中の親水基を発色することもで
きる。In the above embodiment, various samples are placed in a dye solution and boiled for a certain period of time for dyeing. In the case of a single sample, the sample is immersed in a uniformly dissolved dye solution. It can also develop a hydrophilic group.
【００１８】[0018]
【実施例】以下、本発明の実施例について説明するが、
本発明がこれによって限定されるものではない。Hereinafter, embodiments of the present invention will be described.
The present invention is not limited by this.
【００１９】カチオン染料（商標カヤステンＱ：日本化
薬製）１．０ｇを１００ｇの蒸留水に入れ加温（６０℃
〜７０℃）して均一に溶解した後、沸騰させた溶液中に
ポリプロピレン繊維から成る不織布に各種親水化処理及
びイオン交換樹脂微粉体を付着したセパレータの試料
Ａ，Ｂ，Ｃ，Ｄ，Ｅを投入して攪拌しながら１０分間煮
沸した。次に、各種試料Ａ，Ｂ，Ｃ，Ｄ，Ｅを十分に水
洗して、８０℃×１０分間乾燥したところ、各種試料は
次の色彩に発色され、次の事項が判別された。1.0 g of a cationic dye (Kayasten Q: manufactured by Nippon Kayaku) is placed in 100 g of distilled water and heated (60 ° C.).
(70-70 ° C) and uniformly dissolved. Then, in a boiling solution, non-woven fabrics made of polypropylene fibers were subjected to various hydrophilizing treatments and separator samples A, B, C, D, and E were attached. It poured and boiled for 10 minutes, stirring. Next, each of the samples A, B, C, D, and E was sufficiently washed with water and dried at 80 ° C. for 10 minutes. As a result, the samples were colored in the following colors, and the following items were determined.
【００２０】 発色された色彩 判別した親水化処理方法等 親水基の種類 試料Ａ 濃い赤色 スルフォン化処理 −ＳＯ3 Ｈ 試料Ｂ 薄いピンク色 フッ酸＋亜硫酸ガス 同上 試料Ｃ 濃紫色 アクリル酸グラフト重合 −ＣＯＯＨ 試料Ｄ 薄い青色 ＰＶＡ共重合繊維等 −ＯＨ 試料Ｅ 赤色 イオン交換樹脂 −ＳＯ3 ＨColored Color Distinguished Hydrophilization treatment method etc. Type of hydrophilic group Sample A Dark red Sulfonation treatment -SO 3 H Sample B Light pink hydrofluoric acid + sulfurous acid gas Same as above Sample C Dark purple acrylic acid graft polymerization -COOH Sample D Light blue PVA copolymer fiber, etc. -OH Sample E Red ion exchange resin -SO 3 H
【００２１】また、赤色の色相の差異によって、試料
Ａ，Ｂ，Ｅのスルフォン基導入量は、試料Ａ＞試料Ｅ＞
試料Ｂであることが判別された。さらに、各種試料Ａ〜
Ｅの発色状態（バラツキ・ムラ）によって、試料中の親
水基の分布状態を判別して、親水基の付着の均一性を確
認することができた。Also, due to the difference in red hue, the amount of sulfone groups introduced into Samples A, B, and E was determined as Sample A> Sample E>
Sample B was determined. Further, various samples A to
The distribution state of the hydrophilic groups in the sample was determined based on the color development state (variation and unevenness) of E, and the uniformity of the adhesion of the hydrophilic groups could be confirmed.
【００２２】次に、アクリル酸グラフト重合処理セパレ
ータの試料Ｃを、５％の過マンガン酸カリウムを溶解し
た３０％の水酸化カリウム溶液に浸漬し、６０℃で１時
間放置する耐酸化試験を行った後、上述の染料溶液中に
浸漬して染色した。この試料Ｃは、耐酸化試験前に染色
したものと比較して、色相が薄くなっており、耐酸化試
験によって試料中のカルボキシル基が脱落したことが確
認できた。Next, a sample C of the acrylic acid graft polymerization-treated separator was immersed in a 30% potassium hydroxide solution in which 5% of potassium permanganate was dissolved, and an oxidation resistance test was performed in which the sample was left at 60 ° C. for 1 hour. After that, it was immersed in the above-mentioned dye solution and dyed. This sample C had a lighter hue than that dyed before the oxidation resistance test, and it was confirmed by the oxidation resistance test that the carboxyl groups in the sample had dropped off.
【００２３】また、上記試料ＡとＣとＥとを用いて、容
量２４００ｍＡｈの密閉電池を試作して、０．１Ｃ率で
１３０％充電し、０．２Ｃ率で０．８Ｖまで放電する、
充放電サイクル試験を行った後、上述と同一の染料溶液
を用いて染色した。A sealed battery having a capacity of 2400 mAh is prototyped using the above-mentioned samples A, C and E, and charged to 130% at a rate of 0.1 C and discharged to 0.8 V at a rate of 0.2 C.
After performing the charge / discharge cycle test, dyeing was performed using the same dye solution as described above.
【００２４】上記試料Ｃは、サイクル数が進むにつれ
て、電極接触部分から変色が進行することが確認でき
た。そこで、電極接触部分を光学顕微鏡で観察したとこ
ろ、試料Ｃの電極接触部分の一部の繊維が濃紫から黄変
（ポリプロピレン繊維特有の色）しており、この試料Ｃ
の親水基は、サイクル試験により外れたものであること
が確認できた。これに対して、試料ＡとＥは、サイクル
数が進んでも、変色が生じず、サイクル寿命特性に優れ
ていることが確認できた。In sample C, it was confirmed that the discoloration progressed from the electrode contact portion as the cycle number increased. Then, when the electrode contact portion was observed with an optical microscope, a part of the fiber of the electrode contact portion of Sample C turned from deep purple to yellow (a color unique to polypropylene fiber).
It was confirmed that the hydrophilic group was out of the range by the cycle test. On the other hand, it was confirmed that the samples A and E did not discolor even if the number of cycles was advanced, and had excellent cycle life characteristics.
【００２５】[0025]
【発明の効果】本発明によるときは、親水化処理又はイ
オン交換能を付与したセパレータの性能を、簡単な方法
によって短時間で分析することができる。また、製造工
程におけるロット毎の一部や最終製品の端末に本発明の
方法を用いることにより、主として工程管理や品質管理
等に適用することができ、セパレータ製品の品質の安定
化を図ることができる。According to the present invention, the performance of a separator provided with a hydrophilic treatment or an ion exchange ability can be analyzed in a short time by a simple method. In addition, by using the method of the present invention for a part of each lot in a manufacturing process or a terminal of a final product, the method can be mainly applied to process control, quality control, and the like, and the quality of separator products can be stabilized. it can.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西川 和寿 奈良県北葛城郡王寺町明神３丁目２の15 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuhisa Nishikawa 3-2-1, Myojin, Oji-cho, Kitatsukatsugi-gun, Nara Prefecture
Claims (7)
た、疎水性繊維から成る電池用セパレータの試料をイオ
ン結合可能な染料の溶液で以て染色し、試料中の親水基
を発色させることを特徴とする電池用セパレータの性能
分析方法。1. A method of dyeing a sample of a battery separator made of a hydrophobic fiber, which has been subjected to a hydrophilic treatment or an ion-exchange ability, with a solution of an ion-bondable dye to develop a hydrophilic group in the sample. Characteristic method for analyzing battery separator performance.
基の分布状態を判別する請求項１に記載の電池用セパレ
ータの性能分析方法。2. The method for analyzing the performance of a battery separator according to claim 1, wherein the distribution state of the hydrophilic groups in the sample is determined based on the color development state of the sample.
試料中の親水基の種類を判別する請求項１に記載の電池
用セパレータの性能分析方法。3. The change in hue of the color-developed sample
The method for analyzing the performance of a battery separator according to claim 1, wherein the type of the hydrophilic group in the sample is determined.
準色彩との色差を求め、この偏差値によって、試料中の
親水基導入量を定量的に判別する請求項１に記載の電池
用セパレータの性能分析方法。4. The battery separator according to claim 1, wherein a color difference between the color of the color-developed sample and a preset reference color is obtained, and the amount of the hydrophilic group introduced into the sample is quantitatively determined based on the deviation value. Performance analysis method.
た、疎水性繊維から成る電池用セパレータの試料を用い
て、セパレータの耐薬品性試験又は電池の性能試験を行
った後に、上記試料をイオン結合可能な染料の溶液で以
て染色し、試料の発色状態によって、試料中の親水基の
劣化状況を判別することを特徴とする電池用セパレータ
の性能分析方法。5. After performing a chemical resistance test or a battery performance test of a separator using a sample of a battery separator made of a hydrophobic fiber and provided with a hydrophilic treatment or an ion exchange ability, the sample is ionized. A method for analyzing the performance of a battery separator, wherein the method is performed by dyeing with a solution of a dye capable of binding, and judging the state of deterioration of the hydrophilic group in the sample according to the color development state of the sample.
又は酸性染料である請求項１、２、３、４又は５に記載
の電池用セパレータの性能分析方法。6. The method according to claim 1, wherein the dye capable of ion bonding is a cationic dye or an acid dye.
て、試料中の官能基との結合力を調整して発色させた請
求項１、２、４、５又は６に記載の電池用セパレータの
性能分析方法。7. The battery separator according to claim 1, wherein the pH of the dye capable of ion-bonding is adjusted to adjust the bonding force with the functional group in the sample to form a color. Performance analysis method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32947197A JP3914978B2 (en) | 1997-11-12 | 1997-11-12 | Battery separator performance analysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32947197A JP3914978B2 (en) | 1997-11-12 | 1997-11-12 | Battery separator performance analysis method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11142339A true JPH11142339A (en) | 1999-05-28 |
| JP3914978B2 JP3914978B2 (en) | 2007-05-16 |
Family
ID=18221755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32947197A Expired - Lifetime JP3914978B2 (en) | 1997-11-12 | 1997-11-12 | Battery separator performance analysis method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3914978B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008107212A (en) * | 2006-10-26 | 2008-05-08 | Sawai Pharmaceutical Co Ltd | New sticking evaluating method |
| JP2020009608A (en) * | 2018-07-06 | 2020-01-16 | トヨタ自動車株式会社 | Contaminant identification method of fuel cell separator |
| CN115184346A (en) * | 2022-07-08 | 2022-10-14 | 天鹏锂能技术(淮安)有限公司 | Battery self-discharge detection method |
-
1997
- 1997-11-12 JP JP32947197A patent/JP3914978B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008107212A (en) * | 2006-10-26 | 2008-05-08 | Sawai Pharmaceutical Co Ltd | New sticking evaluating method |
| JP2020009608A (en) * | 2018-07-06 | 2020-01-16 | トヨタ自動車株式会社 | Contaminant identification method of fuel cell separator |
| CN115184346A (en) * | 2022-07-08 | 2022-10-14 | 天鹏锂能技术(淮安)有限公司 | Battery self-discharge detection method |
| CN115184346B (en) * | 2022-07-08 | 2024-06-04 | 天鹏锂能技术(淮安)有限公司 | Battery self-discharge detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3914978B2 (en) | 2007-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5229282A (en) | Preparation of biosensor having a layer containing an enzyme, electron acceptor and hydrophilic polymer on an electrode system | |
| US5030697A (en) | Polymer-bound dyes, process for their production and use | |
| CA1192821A (en) | High glucose-determining analytical element | |
| US4891046A (en) | Tinted contact lens and method for preparation with dichlorotriazine reactive dye | |
| JPS59120958A (en) | Test piece and its manufacture | |
| US5565363A (en) | Reagent composition for measuring ionic strength or specific gravity of aqueous solution samples | |
| JPH11142339A (en) | Analysis of capacity of separator for battery | |
| CN106932693A (en) | Insulating paper Diagnosis of Aging based on fiber dispersion dye image feature in oil | |
| CN112881928A (en) | Screening method for consistency of battery monomers | |
| CN110265714A (en) | A kind of Ionomer electrolyte and its preparation method and application | |
| JP2003535231A (en) | Acrylic fiber dyeing method | |
| CN111579412A (en) | Method for evaluating performance of negative electrode binder | |
| JP3810534B2 (en) | Hematocrit value measuring element and method for measuring hematocrit value | |
| EP0158443A2 (en) | A latex for immunoserological tests and a method of producing the same | |
| CA2294599A1 (en) | Non-woven fabric laminate | |
| CN105301194B (en) | The detection method of surface of positive electrode active material covered effect | |
| CN112335111B (en) | Slurry for adhesive layer, battery member, and method for producing nonaqueous secondary battery | |
| CN116087135B (en) | Evaluation test method for performance of inner layer adhesive of aluminum plastic film | |
| CN108344660A (en) | A kind of detection method of silk gum content | |
| FR2643089A1 (en) | POLYAMIDE-IMIDE-BASED YARNS AND THE PROCESS FOR OBTAINING THEIR | |
| CA2140812A1 (en) | Method for preparing dye useful for tinting contact lens | |
| JPS60112493A (en) | Polyester film for dry-type transfer color development of cationic dye | |
| JPH063346A (en) | Hydrogel formed body for detecting free chlorine | |
| CN118017155B (en) | High-safety diaphragm and preparation method and application thereof | |
| CN112014744A (en) | Method for evaluating influence of pole piece surface defects on performance of lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040202 |
|
| A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A711 Effective date: 20040202 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20040202 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060829 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060929 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070109 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |