JPH05211062A - Aging method for lead-acid battery plate - Google Patents
Aging method for lead-acid battery plateInfo
- Publication number
- JPH05211062A JPH05211062A JP4015297A JP1529792A JPH05211062A JP H05211062 A JPH05211062 A JP H05211062A JP 4015297 A JP4015297 A JP 4015297A JP 1529792 A JP1529792 A JP 1529792A JP H05211062 A JPH05211062 A JP H05211062A
- Authority
- JP
- Japan
- Prior art keywords
- lead
- aging
- electrode plate
- current collector
- plate
- 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.)
- Withdrawn
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
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉛蓄電池用極板の熟成
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for aging lead plates for lead-acid batteries.
【０００２】[0002]
【従来の技術】一般に鉛蓄電池用極板は次のようにして
製造する。まず、酸化鉛を主成分とする鉛粉と希硫酸と
水とを混練してペースト状活物質を作った後、鉛または
鉛合金からなる格子体等の集電体に該ペースト状活物質
を充填して未乾燥極板を作る。次にこの未乾燥極板を高
温度で且つ高湿度の雰囲気中に所定時間放置して熟成を
行い、その後乾燥処理を行って未化成の鉛蓄電池用極板
を製造する。熟成工程においては、ペースト状活物質中
の鉛粉を酸化させて酸化鉛（ＰｂＯ）を生成させるとと
もに三塩基性硫酸鉛（３ＰｂＯ・ＰｂＳＯ4 ）を成長さ
せて活物質粒子間の結合力を高める。そして集電体の表
面部を腐食させてその表面部に酸化鉛（ＰｂＯ）を生成
させて集電体のＰｂＯと活物質中のＰｂＯとを結合させ
て集電体と活物質との間の密着力を高める。一般的に
は、温度を極板の種類に応じた室温から８０℃の間の適
当な温度に保ち、また湿度をペースト中の水分を早期に
減少させないように１００％に近い相対湿度に保った熟
成槽内に未乾燥極板を所定時間放置して熟成を行う。2. Description of the Related Art Generally, an electrode plate for a lead storage battery is manufactured as follows. First, a lead powder containing lead oxide as a main component, dilute sulfuric acid, and water are kneaded to form a paste-like active material, and then the paste-like active material is applied to a current collector such as a grid body made of lead or a lead alloy. Fill to make undried plates. Next, this undried electrode plate is left for a predetermined time in an atmosphere of high temperature and high humidity for aging, and then dried to produce an unformed electrode plate for a lead storage battery. In the aging step, the lead powder in the paste-like active material is oxidized to generate lead oxide (PbO), and tribasic lead sulfate (3PbO · PbSO 4 ) is grown to increase the binding force between the active material particles. .. Then, the surface portion of the current collector is corroded, lead oxide (PbO) is generated on the surface portion, PbO of the current collector and PbO in the active material are combined, and a space between the current collector and the active material is formed. Improves adhesion. Generally, the temperature was kept at an appropriate temperature between room temperature and 80 ° C. according to the type of electrode plate, and the humidity was kept at a relative humidity close to 100% so as not to reduce the moisture in the paste early. The undried electrode plate is left to stand in the aging tank for a predetermined time for aging.
【０００３】[0003]
【発明が解決しようとする課題】熟成を行う際の温度を
高くすると集電体の表面部の腐食速度が速くなって、熟
成効率を向上させることができる。しかしながら、限界
温度以上の高温中で極板の熟成を行うとペースト中の三
塩基性硫酸鉛は四塩基性硫酸鉛に変化する。例えば、陽
極板を熟成する場合には約６０℃が限界温度であり、ま
た陰極板を熟成する場合には約８０℃が限界温度であ
る。四塩基性硫酸鉛は比較的大きな柱状結晶を有してい
るため、四塩基性硫酸鉛が生成すると極板の寿命性能は
高くなるものの極板の化成効率が低くなり、また極板の
初期の容量が低くなるという問題が生じる。そのため従
来は、上記の限界温度より低い温度で熟成を行って、四
塩基性硫酸鉛を発生させないように長い時間をかけて熟
成をおこなっていた。本発明の目的は、四塩基性硫酸鉛
を生成させずに短時間で熟成を行うことができる鉛蓄電
池用極板の熟成方法を提供することにある。When the temperature during aging is increased, the corrosion rate of the surface portion of the current collector is increased, and the aging efficiency can be improved. However, when the electrode plate is aged at a temperature higher than the limit temperature, the tribasic lead sulfate in the paste changes to tetrabasic lead sulfate. For example, when aging the anode plate, about 60 ° C. is the limit temperature, and when aging the cathode plate, about 80 ° C. is the limit temperature. Since tetrabasic lead sulfate has relatively large columnar crystals, when tetrabasic lead sulfate is formed, the life performance of the electrode plate is increased, but the conversion efficiency of the electrode plate is reduced, and the The problem of low capacity arises. Therefore, conventionally, aging was carried out at a temperature lower than the above-mentioned limit temperature, and aging was carried out for a long time so as not to generate tetrabasic lead sulfate. An object of the present invention is to provide a method for aging a lead-acid battery electrode plate that can be aged in a short time without producing tetrabasic lead sulfate.
【０００４】[0004]
【課題を解決するための手段】請求項１の発明は、ペー
スト状活物質を鉛または鉛合金からなる集電体に充填す
る鉛蓄電池用極板の熟成方法を対象とする。そして本発
明では、集電体の一方の端部に鉛よりイオン化傾向の小
さい金属または合金を電気的に接続し、集電体の他方の
端部に該金属または合金を電解質溶液を介して接続した
状態で熟成を行う。請求項２の発明では、電解質溶液と
して中性硫酸塩の溶液を用いる。The invention according to claim 1 is directed to a method for aging a lead-acid battery electrode plate, in which a current collector made of lead or a lead alloy is filled with a paste-like active material. And in the present invention, a metal or alloy having a smaller ionization tendency than lead is electrically connected to one end of the current collector, and the metal or alloy is connected to the other end of the current collector through an electrolyte solution. Aging is carried out in this state. In the invention of claim 2, a solution of neutral sulfate is used as the electrolyte solution.
【０００５】[0005]
【作用】請求項１の発明では、集電体と鉛よりイオン化
傾向の小さい金属または合金との間に発生する起電力の
差を利用して、集電体に微小電流を流すことによって以
下に示される反応式により集電体の表面部を短時間で腐
食させることができる。According to the invention of claim 1, by utilizing a difference in electromotive force generated between the current collector and a metal or alloy having a smaller ionization tendency than that of lead, a small current is passed through the current collector to achieve the following. By the reaction formula shown, the surface portion of the current collector can be corroded in a short time.
【０００６】 Ｐｂ→Ｐｂ2+ （溶解） Ｐｂ2+＋2/1 Ｏ2 ＋Ｈ2 Ｏ→Ｐｂ（ＯＨ）2 Ｐｂ（ＯＨ）2 →ＰｂＯ＋Ｈ2 Ｏ そのため、本発明によれば四塩基性硫酸鉛が生成する限
界温度より低い温度で熟成を行っても集電体と活物質と
の間の密着性を早期に向上させることができ、寿命性能
の高い極板を短時間の熟成で得ることができる。請求項
２の発明のように電解質溶液として中性硫酸塩の溶液を
用いると電池性能に悪影響を及ぼすことなく熟成時間を
短縮できる。Pb → Pb 2+ (dissolved) Pb 2+ +2/1 O 2 + H 2 O → Pb (OH) 2 Pb (OH) 2 → PbO + H 2 O Therefore, according to the present invention, tetrabasic lead sulfate is Even if aging is performed at a temperature lower than the critical temperature at which it is formed, the adhesion between the current collector and the active material can be improved early, and an electrode plate with high life performance can be obtained in a short time aging. .. When a neutral sulfate solution is used as the electrolyte solution as in the invention of claim 2, the aging time can be shortened without adversely affecting the battery performance.
【０００７】[0007]
【実施例】以下、本発明の方法を用いて極板を熟成する
場合の実施例について図面を参照して詳細に説明する。
図１は本発明の方法を実施する装置の断面を示す概略構
成図であり、図２は図１のＡ−Ａ線断面図である。同図
において、１は内部の温度及び湿度を制御できる熟成槽
であり、熟成槽１の底部１ａ上には、受け皿２が載置さ
れている。この受け皿２の中には電解質溶液（中性硫酸
塩溶液）を含浸したガラス不織布３が配置されている。
この実施例では、０．２重量％の硫酸ナトリウム（Ｎａ
2 ＳＯ4）溶液を電解質溶液として用いている。４は複
数枚の未乾燥極板５…を支持する架台であり、図１及び
２には未乾燥極板５…を支持する一対の棒状部材４ａ，
４ａだけを示し、この棒状部材４ａ，４ａを熟成槽１の
底部１ａまたは受け皿２に対して固定するための支持部
材は図示していない。本実施例では棒状部材４ａ，４ａ
を銅から形成している。未乾燥極板５は、ペースト状活
物質５ａが充填された格子体５ｂの耳部５ｃと凸状部５
ｄとを、一対の棒状部材４ａ，４ａに引っ掛けた状態で
吊下げられており、吊下げられた未乾燥極板５の格子体
５ｂの枠部５ｅの一部が受け皿２中の電解質溶液に浸漬
されている。受け皿２の内部には、鉛よりイオン化傾向
の小さい金属または合金としての銅板６が電解質溶液中
に浸漬した状態で配置されている。電解質溶液は、格子
体５ｂと銅板６との間でイオン伝導性を確保する機能を
果している。銅板６は、銅線からなる導電線７により棒
状部材４ａ，４ａの少なくとも一方に接続されている。
銅板６の大きさは、複数枚の未乾燥極板５…の格子体５
ｂ…と銅板６との間に発生する起電力の差が所定レベル
（２００mV) 以上になるように定められている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of aging an electrode plate using the method of the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing a cross section of an apparatus for carrying out the method of the present invention, and FIG. 2 is a cross sectional view taken along the line AA of FIG. In FIG. 1, reference numeral 1 denotes a aging tank whose internal temperature and humidity can be controlled, and a saucer 2 is placed on the bottom 1 a of the aging tank 1. A glass nonwoven fabric 3 impregnated with an electrolyte solution (neutral sulfate solution) is arranged in the tray 2.
In this example, 0.2 wt% sodium sulfate (Na
2 SO 4 ) solution is used as the electrolyte solution. Reference numeral 4 denotes a pedestal that supports a plurality of undried electrode plates 5, ... In FIGS. 1 and 2, a pair of rod-shaped members 4a that support the undried electrode plates 5 ...
4a is shown, and a supporting member for fixing the rod-shaped members 4a, 4a to the bottom portion 1a of the aging tank 1 or the tray 2 is not shown. In this embodiment, the rod-shaped members 4a, 4a
Is formed from copper. The undried electrode plate 5 includes the ears 5c and the protrusions 5 of the lattice 5b filled with the paste-like active material 5a.
and d are hung in a state of being hooked on the pair of rod-shaped members 4a, 4a, and a part of the frame portion 5e of the grid 5b of the undried electrode plate 5 becomes the electrolyte solution in the tray 2. It is immersed. Inside the tray 2, a copper plate 6 as a metal or alloy having a smaller ionization tendency than lead is arranged in a state of being immersed in the electrolyte solution. The electrolyte solution has a function of ensuring ionic conductivity between the grid 5b and the copper plate 6. The copper plate 6 is connected to at least one of the rod-shaped members 4a, 4a by a conductive wire 7 made of a copper wire.
The size of the copper plate 6 is the grid 5 of a plurality of undried electrode plates 5 ...
It is set so that the difference in electromotive force generated between b ... And the copper plate 6 becomes a predetermined level (200 mV) or more.
【０００８】本実施例において、棒状部材４ａ及び導電
線７により、未乾燥極板５…の格子体５ｂの一端を銅板
６に電気的に接続する導電体が構成されている。また格
子体５ｂの耳部５ｃ及び凸状部５ｄにより集電体の一方
の端部が構成され、電解質溶液に浸漬された格子体５ｂ
の枠部５ｅの一部により集電体の他方の端部が構成され
ている。In the present embodiment, the rod-shaped member 4a and the conductive wire 7 constitute a conductor for electrically connecting one end of the grid 5b of the undried electrode plates 5 to the copper plate 6. Further, one end of the current collector is constituted by the ear portion 5c and the convex portion 5d of the lattice body 5b, and the lattice body 5b immersed in the electrolyte solution is formed.
The other end portion of the current collector is configured by a part of the frame portion 5e.
【０００９】上記実施例においては、棒状部材４ａ及び
導電線７を銅により形成しているが、これらは鉛よりイ
オン化傾向の小さい金属または合金から形成されていれ
ばよい。また上記実施例では、鉛よりイオン化傾向の小
さい金属または合金として銅板６を用いたが、銅板に代
えて金、銀等を用いることができる。更に電解質溶液は
イオン伝導性を確保できる水溶液であればよく、例えば
硫酸ナトリウムに代えて硫酸カリウム等の溶液を用いる
ことができる。In the above embodiment, the rod-shaped member 4a and the conductive wire 7 are made of copper, but they may be made of a metal or alloy having a smaller ionization tendency than lead. Further, in the above embodiment, the copper plate 6 was used as the metal or alloy having a smaller ionization tendency than lead, but gold, silver or the like can be used instead of the copper plate. Further, the electrolyte solution may be an aqueous solution capable of ensuring ionic conductivity, and for example, a solution of potassium sulfate or the like can be used instead of sodium sulfate.
【００１０】次に上記装置を用いて、未乾燥極板を熟成
した試験例について説明する。熟成に用いた未乾燥極板
としては、Ｃａ系鉛合金からなる寸法１００mm×１００
mm×１．５mmの格子体（集電体）３に、鉛粉８１重量％
と硫酸４重量％と水１５重量％とを混練して作ったペー
スト状活物質を充填したものを用いた。この極板を１０
０枚棒状部材４ａ，４ａに吊下げ、銅板６としては１０
０mm×５０mm×２mmの銅板を用いた。熟成槽１の内部の
温度は５０℃、相対湿度は９８％に維持した。未乾燥極
板２は、未乾燥極板２と銅板６とによって発生した起電
力の差によって格子体５ｂに電流が流れ、格子体の表面
部に位置する鉛が酸化してＰｂＯに変化し、格子体の表
面部の腐食が促進されて、未乾燥極板２の熟成効率が向
上する。Next, a test example in which the undried electrode plate is aged using the above-mentioned apparatus will be described. As the undried electrode plate used for aging, a size of 100 mm x 100 made of Ca-based lead alloy
81% by weight of lead powder in a grid body (current collector) 3 mm × 1.5 mm
A paste-like active material prepared by kneading 4% by weight of sulfuric acid and 15% by weight of water was used. This electrode plate 10
It is hung from 0 rod-shaped members 4a, 4a, and the copper plate 6 is 10
A copper plate of 0 mm x 50 mm x 2 mm was used. The temperature inside the aging tank 1 was maintained at 50 ° C. and the relative humidity was maintained at 98%. In the undried electrode plate 2, due to the difference in electromotive force generated by the undried electrode plate 2 and the copper plate 6, a current flows through the grid 5b, and lead located on the surface of the grid is oxidized and changed to PbO, Corrosion of the surface portion of the grid is promoted, and the aging efficiency of the undried electrode plate 2 is improved.
【００１１】本実施例の方法により熟成した格子体の腐
食層厚さと熟成時間との関係を図３に示す。図３におい
て曲線ａは本実施例の方法により熟成した極板の特性曲
線である。曲線ｂは従来の方法（熟成槽の内部の温度及
び相対湿度は上記例と同じ）により熟成した極板の特性
曲線である。本図より本実施例の方法で極板を熟成する
と従来の方法に比較して腐食の進行が速いのが判る。FIG. 3 shows the relationship between the corrosion layer thickness and the aging time of the lattice aged by the method of this embodiment. In FIG. 3, a curve a is a characteristic curve of the electrode plate aged by the method of this embodiment. Curve b is a characteristic curve of an electrode plate aged by a conventional method (the temperature and relative humidity inside the aging tank are the same as those in the above example). From this figure, it is understood that when the electrode plate is aged by the method of this embodiment, the corrosion progresses faster than in the conventional method.
【００１２】次に、本実施例の方法により６時間熟成し
た極板ａと、従来の方法により６時間熟成した極板ｂと
をそれぞれ用いて３４Ｂ２０系の電池Ａ，Ｂを製造し
た。そして各電池Ａ，Ｂを４０℃の水槽で５時間率公称
容量の７０％を放電した後に放電量の１２０％を充電す
る充放電を繰返し、２５サイクル毎に１．７Ｖまで放電
した際の放電持続時間を測定して電池Ａ，Ｂの充放電特
性を調べた。図４は測定結果を示している。本図より、
本実施例の方法で熟成した極板ａを用いた電池Ａが、従
来の方法で熟成した極板ｂを用いた電池Ｂより寿命性能
が向上しているのが判る。Next, batteries A and B of the 34B20 series were manufactured using the electrode plate a aged for 6 hours by the method of this example and the electrode plate b aged for 6 hours by the conventional method. Then, each battery A, B was repeatedly charged and discharged by discharging 70% of the nominal capacity for 5 hours in a water tank at 40 ° C. and then charging 120% of the discharge amount, and discharging when it was discharged to 1.7 V every 25 cycles. The duration was measured and the charge / discharge characteristics of the batteries A and B were examined. FIG. 4 shows the measurement results. From this figure,
It can be seen that the battery A using the electrode plate a aged by the method of this example has a longer life performance than the battery B using the electrode plate b aged by the conventional method.
【００１３】本実施例では格子体の腐食を促進させる金
属（銅板６）と格子体とを棒状部材と接続線とからなる
導電体を介して接続したが、導電体を介さずに格子体の
腐食を促進させる金属と格子体とを直接接続してもよ
い。架台４全体を鉛よりイオン化傾向の小さい金属（例
えば銅）で形成し、架台４の下端を電解液溶液に浸漬す
るようにしてもよい。In this embodiment, the metal (copper plate 6) that promotes the corrosion of the lattice and the lattice were connected via the conductor consisting of the rod-shaped member and the connecting wire. The metal that promotes corrosion may be directly connected to the grid. Alternatively, the entire pedestal 4 may be formed of a metal (for example, copper) having a smaller ionization tendency than lead, and the lower end of the pedestal 4 may be immersed in the electrolytic solution.
【００１４】また本実施例では陽極板を熟成する方法に
本発明を適用したが陰極板を熟成する場合にも、本発明
の方法を適用できるのは勿論である。Further, although the present invention is applied to the method of aging the anode plate in the present embodiment, it goes without saying that the method of the present invention can also be applied to the case of aging the cathode plate.
【００１５】[0015]
【発明の効果】請求項１の発明によれば、四塩基性硫酸
鉛が生成する限界温度より低い温度で熟成を行っても集
電体と活物質との間の密着性を早期に向上させることが
でき、寿命性能の高い極板を短時間の熟成で得ることが
できる。請求項２の発明のよれば、電池性能に悪影響を
及ぼすことなく熟成時間を短縮できる。According to the first aspect of the present invention, the adhesion between the current collector and the active material can be promptly improved even if aging is performed at a temperature lower than the critical temperature at which tetrabasic lead sulfate is formed. Therefore, an electrode plate having high life performance can be obtained by aging for a short time. According to the invention of claim 2, the aging time can be shortened without adversely affecting the battery performance.
【図１】本実施例の熟成を行う熟成槽の概略断面図であ
る。FIG. 1 is a schematic cross-sectional view of a aging tank for aging the present embodiment.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】試験に用いた極板の格子体の腐食層厚さと熟成
時間との関係を示す図である。FIG. 3 is a diagram showing the relationship between the corrosion layer thickness of the grid plate of the electrode plate used in the test and the aging time.
【図４】試験に用いた電池の寿命特性を示す図である。FIG. 4 is a diagram showing the life characteristics of the battery used in the test.
１…熟成槽、２…受け皿、３…ガラス不織布、４…架
台、５…未乾燥極板、５ａ…ペースト状活物質、５ｂ…
格子体、５ｃ…耳部、５ｄ…凸状部、５ｅ…枠部、６…
銅板。DESCRIPTION OF SYMBOLS 1 ... Aging tank, 2 ... Saucepan, 3 ... Glass nonwoven fabric, 4 ... Stand, 5 ... Undried electrode plate, 5a ... Paste active material, 5b ...
Lattice body, 5c ... Ear portion, 5d ... Convex portion, 5e ... Frame portion, 6 ...
Copper plate.
Claims (2)
る集電体に充填してなる鉛蓄電池用極板の熟成方法にお
いて、 前記集電体の一方の端部に鉛よりイオン化傾向の小さい
金属または合金を電気的に接続し、 前記集電体の他方の端部に前記金属または合金を電解質
溶液を介して接続した状態で熟成を行うことを特徴とす
る鉛蓄電池用極板の熟成方法。1. A method for aging an electrode plate for a lead storage battery, comprising a current collector made of lead or a lead alloy filled with a paste-like active material, wherein one end of the current collector has a smaller ionization tendency than lead. A method for aging a lead-acid battery electrode plate, which comprises electrically connecting a metal or an alloy, and performing aging in a state where the other end of the current collector is connected to the metal or alloy via an electrolyte solution. ..
いることを特徴とする請求項１に記載の鉛蓄電池用極板
の熟成方法。2. The method for aging a lead-acid battery electrode plate according to claim 1, wherein a neutral sulfate solution is used as the electrolyte solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4015297A JPH05211062A (en) | 1992-01-30 | 1992-01-30 | Aging method for lead-acid battery plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4015297A JPH05211062A (en) | 1992-01-30 | 1992-01-30 | Aging method for lead-acid battery plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05211062A true JPH05211062A (en) | 1993-08-20 |
Family
ID=11884895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4015297A Withdrawn JPH05211062A (en) | 1992-01-30 | 1992-01-30 | Aging method for lead-acid battery plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05211062A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148370A (en) * | 2011-02-28 | 2011-08-10 | 河南超威电源有限公司 | Quick aging hardening cabinet and technique for storage battery grids |
| JP2013211205A (en) * | 2012-03-30 | 2013-10-10 | Furukawa Battery Co Ltd:The | Negative electrode plate for lead-acid storage battery, manufacturing method therefor and lead-acid storage battery |
-
1992
- 1992-01-30 JP JP4015297A patent/JPH05211062A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148370A (en) * | 2011-02-28 | 2011-08-10 | 河南超威电源有限公司 | Quick aging hardening cabinet and technique for storage battery grids |
| JP2013211205A (en) * | 2012-03-30 | 2013-10-10 | Furukawa Battery Co Ltd:The | Negative electrode plate for lead-acid storage battery, manufacturing method therefor and lead-acid storage battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990408 |