JPH06111812A - Manufacture of electrode plate for lead-acid battery - Google Patents
Manufacture of electrode plate for lead-acid batteryInfo
- Publication number
- JPH06111812A JPH06111812A JP4258348A JP25834892A JPH06111812A JP H06111812 A JPH06111812 A JP H06111812A JP 4258348 A JP4258348 A JP 4258348A JP 25834892 A JP25834892 A JP 25834892A JP H06111812 A JPH06111812 A JP H06111812A
- Authority
- JP
- Japan
- Prior art keywords
- active material
- lead
- mold
- current collector
- material paste
- 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- Withdrawn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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
- H01M4/16—Processes of manufacture
- H01M4/20—Processes of manufacture of pasted electrodes
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- 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製造方
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 of manufacturing an electrode plate for a lead storage battery.
【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粉体と希硫酸とを
混練した高粘度の活物質ペーストを鋳造格子、エキスパ
ンド格子等の集電体に充填機を用いて充填して未乾燥極
板を作る。次にこの未乾燥極板を熟成乾燥して三塩基性
硫酸鉛を生成した後に、これを化成して鉛蓄電池用極板
を完成する。しかしながら、希硫酸を用いて作った活物
質ペーストの熟成温度を６０℃以上に上げると三塩基性
硫酸鉛が四塩基性硫酸鉛になるため、熟成温度を高くし
て熟成時間の短縮化を図ることができず、熟成に１０数
時間を必要とするいう問題があった。そこで、水練りし
た活物質ペーストを用いて活物質層を形成することが提
案された。水練りした活物質ペーストを用いる場合には
三塩基性硫酸鉛を生成させる必要がないので、熟成温度
を高めて、熟成時間を短縮することができる。2. Description of the Related Art Generally, a lead-acid battery electrode plate is manufactured as follows. First, a high-viscosity active material paste obtained by kneading a powder containing lead oxide as a main component and dilute sulfuric acid is filled in a current collector such as a casting grid or an expanding grid using a packing machine to prepare a undried electrode plate. Next, this undried electrode plate is aged and dried to produce tribasic lead sulfate, and then this is formed to complete the lead acid battery electrode plate. However, if the aging temperature of the active material paste made using dilute sulfuric acid is raised to 60 ° C. or higher, the tribasic lead sulfate becomes tetrabasic lead sulfate, so the aging temperature is increased to shorten the aging time. However, there was a problem that it took 10 to several hours for aging. Therefore, it has been proposed to form an active material layer using an active material paste that has been kneaded with water. When the active material paste kneaded with water is used, it is not necessary to generate tribasic lead sulfate, so the aging temperature can be increased and the aging time can be shortened.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、水練り
した活物質ペーストは粘度が低いために、活物質ペース
トを集電体に充填して活物質層を成形するのは容易では
ない。また、単なる水練ペーストでは、集電体と活物質
との密着力を高め且つ活物質層中の多孔度を十分に高く
することができなかった。更に、従来の方法では集電体
が活物質の充填枠を兼ねているため、集電体の構造を活
物質ペーストを保持できる強度の高い構造にする必要が
あり、そのため、集電体の重量が重くなるという問題が
あった。However, since the water-kneaded active material paste has a low viscosity, it is not easy to fill the current collector with the active material paste to form the active material layer. Moreover, it was not possible to increase the adhesion between the current collector and the active material and to sufficiently increase the porosity in the active material layer with a mere water paste. Further, in the conventional method, since the current collector also serves as a filling frame for the active material, it is necessary to make the structure of the current collector a structure having high strength capable of holding the active material paste. There was a problem that it became heavy.
【０００４】本発明の目的は、水練りした活物質ペース
トを用いて活物質層を形成する場合でも、活物質層の形
成が容易で、しかも集電体と活物質との密着力を高くす
ることができ、また活物質中の多孔度を高くすることが
できる鉛蓄電池用極板の製造方法を提供することにあ
る。An object of the present invention is to easily form an active material layer even when it is used to form an active material layer using a water-kneaded active material paste, and to increase the adhesion between the current collector and the active material. Another object of the present invention is to provide a method for producing an electrode plate for a lead storage battery, which is capable of increasing the porosity of the active material.
【０００５】[0005]
【課題を解決するための手段】本発明は、水練りした活
物質ペーストを用いて活物質層を形成する鉛蓄電池用極
板の製造方法を対象にする。本発明では、活物質ペース
トとして鉛または鉛合金の繊維と鉛丹（Ｐｂ3 Ｏ4 ）と
水とを混練したものを用い、集電体を所定形状の型内に
配置する前または後に活物質ペーストを型に注入し、型
内で活物質ペーストを乾燥させる。The present invention is directed to a method of manufacturing a lead storage battery electrode plate in which an active material layer is formed by using a water-kneaded active material paste. In the present invention, as the active material paste, a material obtained by kneading lead or lead alloy fibers, red lead (Pb 3 O 4 ) and water is used, and the active material is placed before or after the current collector is placed in a mold having a predetermined shape. The paste is poured into a mold and the active material paste is dried in the mold.
【０００６】[0006]
【作用】本発明によれば、集電体を所定形状の型内に配
置する前または後に活物質ペーストを型に注入し、型内
で活物質ペーストを乾燥させるため、低粘度の水練りし
た活物質ペーストを用いて容易に活物質層を成形するこ
とができる。しかも型内で活物質ペーストを乾燥させる
ため、従来のように集電体の構造を活物質ペーストを充
填する充填枠のような強度の高い構造にする必要がな
く、集電体の重量を軽減することができる。According to the present invention, the active material paste is poured into the mold before or after the current collector is placed in the mold having a predetermined shape, and the active material paste is dried in the mold. The active material layer can be easily formed using the active material paste. Moreover, since the active material paste is dried in the mold, it is not necessary to make the structure of the current collector a structure having high strength like a filling frame for filling the active material paste as in the past, and the weight of the current collector is reduced. can do.
【０００７】特に、本発明によれば、活物質ペーストと
して鉛または鉛合金の繊維と鉛丹（Ｐｂ3 Ｏ4 ）と水と
を混練したものを用いるため、活物質ペーストの乾燥過
程で、鉛丹は鉛または鉛合金の繊維及び集電体のそれぞ
れと下記の反応式で急速に反応して一酸化鉛（ＰｂＯ）
を生成する。この反応は温度が高くなると急速に進む。
水練りペーストは、いくら高温で乾燥しても、乾燥段階
で三塩基性硫酸鉛が成長することがないため、高温乾燥
が可能となり、熟成及び乾燥時間の短縮化を図ることが
できる。In particular, according to the present invention, since the active material paste is prepared by kneading lead or lead alloy fiber, red lead (Pb 3 O 4 ) and water, the active material paste is dried during the drying process. Tan reacts rapidly with lead or lead alloy fibers and current collectors according to the following reaction formula, and leads to lead monoxide (PbO)
To generate. This reaction proceeds rapidly at higher temperatures.
Since the tribasic lead sulfate does not grow in the drying stage of the water-mix paste, no matter how high the temperature is, the high-temperature drying becomes possible, and the aging and the drying time can be shortened.
【０００８】Ｐｂ3 Ｏ4 ＋Ｐｂ→４ＰｂＯ このようにして生成された一酸化鉛は非常に緻密な結晶
構造を有しており、その結果、集電体と鉛または鉛合金
の繊維の周囲に一酸化鉛の緻密な層が形成される。極板
が陽極板の場合、このようにして形成された一酸化鉛は
化成によってα−ＰｂＯ2 となる。集電体の表面に形成
されるα−ＰｂＯ2 は集電体と活物質層との密着力を高
める。そして活物質層となるα−ＰｂＯ2 は鉛または鉛
合金の繊維を介して強く結合されるため、活物質どうし
の結合力を高めることができる。また極板が陰極板の場
合には、一酸化鉛は化成によりＰｂとなり、このＰｂが
陽極板におけるα−ＰｂＯ2 と同様に集電体と活物質層
との密着力の向上及び活物質と繊維との密着力の向上に
寄与する。また、活物質層中においては鉛または鉛合金
の繊維は三次元的に交わっているため、高温で乾燥して
水分が急速に蒸発しても活物質層は収縮しにくくなる。
そのため、活物質の多孔度を高く維持することができ
る。このように多孔度を高く維持できると、活物質層内
部の硫酸含有量を増大させることができ、高容量化を図
ることができる。Pb 3 O 4 + Pb → 4PbO The lead monoxide thus produced has a very dense crystal structure, and as a result, the lead monoxide is formed around the current collector and the lead or lead alloy fiber. A dense layer of lead oxide is formed. When the electrode plate is an anode plate, the lead monoxide thus formed becomes α-PbO 2 by chemical conversion. Α-PbO 2 formed on the surface of the current collector enhances the adhesion between the current collector and the active material layer. Then, since α-PbO 2 that becomes the active material layer is strongly bonded through the fibers of lead or lead alloy, the binding force between the active materials can be increased. When the electrode plate is a cathode plate, lead monoxide becomes Pb by chemical conversion, and this Pb improves the adhesion between the current collector and the active material layer and the active material as P-ObO 2 in the anode plate. It contributes to the improvement of the adhesion with the fiber. Further, since the lead or lead alloy fibers are three-dimensionally intersected in the active material layer, the active material layer is unlikely to shrink even if it is dried at a high temperature and the water vaporizes rapidly.
Therefore, the porosity of the active material can be maintained high. If the porosity can be maintained high in this way, the sulfuric acid content inside the active material layer can be increased, and the capacity can be increased.
【０００９】[0009]
【実施例】以下、鉛蓄電池用陽極板を製造する方法を例
にして本発明の実施例を詳細に説明する。まず、平均直
径０．３mm、長さ３mmのＰｂ−Ｓｎ合金繊維２０重量％
と鉛丹８０重量％とを水で混練して１０万ｃｐｓの低粘
度の水練り活物質ペーストを作った。尚、鉛合金繊維の
含有量は活物質充填量を著しく低下させることなく、し
かも化成後において多孔度を高くできる範囲で適当に選
択すればよく、この例では好ましくは１５〜２５重量％
である。またこの繊維の平均直径寸法及び平均長さ寸法
の許容範囲は、それぞれ０．１〜０．４mm、及び２〜４
mmである。次に図１に示すように、一辺開口状の箱型の
金型１内にスペーサ２を有する鉛合金の格子体からなる
集電体３を配置し、定量ポンプを備えたペースト注入機
４を用いて活物質ペーストを金型１内に注入した。次に
金型１を１２０℃で１０分間加熱して活物質ペーストを
急速乾燥してから金型１から未化成極板５を抜き出し
た。そして未化成極板５の化成は、電槽化成により行っ
た。図２は本実施例の方法で製造した陽極板の活物質の
部分模式拡大図である。本図に示すように鉛合金繊維６
はα−ＰｂＯ2 の結晶粒子７を介して連続してつなが
り、各鉛合金繊維６…の間には数百μm の径の細孔８が
形成されている。またα−ＰｂＯ2 の結晶粒子間には数
μm 以下の細孔が形成されている。EXAMPLES Hereinafter, examples of the present invention will be described in detail by taking a method for producing an anode plate for a lead storage battery as an example. First, 20% by weight of Pb-Sn alloy fiber having an average diameter of 0.3 mm and a length of 3 mm
And 80% by weight of lead tin were kneaded with water to prepare a low-viscosity water-mixed active material paste of 100,000 cps. Incidentally, the content of the lead alloy fiber may be appropriately selected within a range capable of increasing the porosity after chemical conversion without significantly reducing the active material filling amount, and in this example, preferably 15 to 25% by weight.
Is. The permissible ranges of the average diameter dimension and the average length dimension of this fiber are 0.1 to 0.4 mm, and 2 to 4 respectively.
mm. Next, as shown in FIG. 1, a current collector 3 made of a lead alloy lattice having spacers 2 is arranged in a box-shaped mold 1 having an opening on one side, and a paste injecting machine 4 equipped with a metering pump is installed. The active material paste was poured into the mold 1. Next, the mold 1 was heated at 120 ° C. for 10 minutes to rapidly dry the active material paste, and then the unformed electrode plate 5 was extracted from the mold 1. The unformed electrode plate 5 was formed by battery case formation. FIG. 2 is a partial schematic enlarged view of the active material of the anode plate manufactured by the method of this example. As shown in this figure, lead alloy fiber 6
Are continuously connected through α-PbO 2 crystal particles 7, and pores 8 having a diameter of several hundred μm are formed between the lead alloy fibers 6 ... Further, pores of several μm or less are formed between the α-PbO 2 crystal grains.
【００１０】次に本実施例の方法で製造した陽極板の特
性を調べるために極板ａ，ｂを作り試験を行った。極板
ａは本実施例の方法で製造した陽極板であり、極板ｂは
従来の方法で製造した陽極板である。尚、陽極板ｂは次
のようにして製造した。まず、主としてＰｂＯからなる
酸化鉛を希硫酸で混練して３５０万ｃｐｓの高粘度の活
物質ペーストを作った。次に従来の活物質ペースト充填
装置でＰｂ−Ｃａ合金の鋳造格子に活物質ペーストを充
填し恒温（３５℃）、恒湿（９８％）の状態で１６時間
放置した後、５時間乾燥して未化成極板を得た。そして
未化成極板を電槽化成して完成した。尚、従来の方法で
陽極板ｂを製造するのに要した時間は、本実施例の方法
で陽極板ａを製造するのに要した時間の５０倍であっ
た。また、陽極板ａ及び陽極板ｂの多孔度及び平均孔径
を調べたところ、従来の方法で製造した陽極板ｂは多孔
度が５５％で、１００μm 以上の細孔が全くなかったの
に対して本実施例の方法で製造した陽極板ａでは多孔度
は陽極板ｂと同様に５５％であったものの、その内の１
０％は１００μm 以上の径の細孔であった。次に、陽極
板ａ，ｂを用いて４Ａｈ−６Ｖタイプの鉛蓄電池Ａ，Ｂ
を作り、各電池Ａ，Ｂを２５±２℃の雰囲気中で終止電
圧１．３Ｖまで１２Ａで放電して各鉛蓄電池Ａ，Ｂの放
電容量を測定した。測定結果は、本実施例の方法で製造
した陽極板ａを用いた電池Ａは従来の方法で製造した陽
極板ｂを用いた電池Ｂに比べて２２％容量が高かった。Next, in order to investigate the characteristics of the anode plate manufactured by the method of this embodiment, electrode plates a and b were prepared and tested. The electrode plate a is an anode plate manufactured by the method of this embodiment, and the electrode plate b is an anode plate manufactured by a conventional method. The anode plate b was manufactured as follows. First, lead oxide mainly composed of PbO was kneaded with dilute sulfuric acid to prepare an active material paste having a high viscosity of 3.5 million cps. Next, using a conventional active material paste filling device, the active material paste was filled in a casting grid of Pb-Ca alloy, left standing for 16 hours at a constant temperature (35 ° C) and constant humidity (98%), and then dried for 5 hours. An unformed electrode plate was obtained. And the unformed electrode plate was completed by forming the battery case. The time required to manufacture the anode plate b by the conventional method was 50 times the time required to manufacture the anode plate a by the method of this example. Further, when the porosity and the average pore diameter of the anode plate a and the anode plate b were examined, it was found that the anode plate b manufactured by the conventional method had a porosity of 55% and had no pores of 100 μm or more. The porosity of the anode plate a manufactured by the method of this example was 55% as in the case of the anode plate b.
0% was pores having a diameter of 100 μm or more. Next, using the anode plates a and b, 4Ah-6V type lead storage batteries A and B
Was prepared, and each of the batteries A and B was discharged at 12 A to an end voltage of 1.3 V in an atmosphere of 25 ± 2 ° C., and the discharge capacities of the lead storage batteries A and B were measured. The measurement result shows that the battery A using the anode plate a manufactured by the method of this example has a capacity higher by 22% than the battery B using the anode plate b manufactured by the conventional method.
【００１１】尚、本実施例は陽極板を製造する場合に本
発明を適用したものであるが、陰極板を製造する方法に
も本発明の製造方法を適用できるのは勿論である。陰極
板を製造する場合には、例えば、鉛丹４０重量％と酸化
鉛４０重量％と鉛合金繊維２０重量％とを水で混練して
活物質ペーストを作ればよい。Although the present invention is applied to the case of manufacturing an anode plate in this embodiment, it goes without saying that the manufacturing method of the present invention can also be applied to a method of manufacturing a cathode plate. When manufacturing the cathode plate, for example, 40% by weight of red lead, 40% by weight of lead oxide, and 20% by weight of lead alloy fiber may be kneaded with water to form an active material paste.
【００１２】また、活物質ペーストを注入する際に用い
る型は本実施例で用いた型に限定されるものではなく、
例えば図３に示されるように集電体をその長手方向に沿
って挿入できる金型１０を用いることもできる。またこ
の場合には、活物質ペーストの注入及び乾燥は、集電体
３０を所定の高さに吊り下げて行ってもよいし、図１の
例のようにスペーサを用いてもよい。また型は金属製の
型に限定されるものではなく、耐熱性を有するものであ
れば、他の材質で形成されたものを用いることができ
る。さらに本実施例では集電体を内部に配置した型に活
物質ペーストを注入したが、活物質ペーストを型に注入
した後に集電体を型の内部に配置しても構わない。The mold used for injecting the active material paste is not limited to the mold used in this embodiment,
For example, as shown in FIG. 3, it is possible to use a mold 10 into which a current collector can be inserted along its longitudinal direction. Further, in this case, the injection and drying of the active material paste may be performed by suspending the current collector 30 at a predetermined height, or using a spacer as in the example of FIG. 1. Further, the mold is not limited to a metal mold, and a mold formed of another material can be used as long as it has heat resistance. Further, in this embodiment, the active material paste is injected into the mold in which the current collector is arranged, but the current collector may be arranged in the mold after the active material paste is injected into the mold.
【００１３】[0013]
【発明の効果】本発明によれば、集電体を所定形状の型
内に配置する前または後に活物質ペーストを型に注入
し、型内で活物質ペーストを乾燥させるため、低粘度の
水練りした活物質ペーストを用いて容易に活物質層を成
形することができる。しかも型内で活物質ペーストを乾
燥させるため、集電体の重量を軽減することができる。
特に、本発明によれば、活物質ペーストとして鉛または
鉛合金の繊維と鉛丹（Ｐｂ3 Ｏ4 ）と水とを混練したも
のを用いるため、集電体と活物質層との密着力の向上及
び活物質と繊維との密着力の向上させることができる。
また、活物質層中においては鉛または鉛合金の繊維は三
次元的に交わっているため、活物質の多孔度を高く維持
することができる。このように多孔度を高く維持できる
と、活物質層内部の硫酸含有量を増大させることがで
き、高容量化を図ることができ、特に電池の高率放電特
性を向上させることができる。According to the present invention, the active material paste is poured into the mold before or after the current collector is placed in the mold having a predetermined shape, and the active material paste is dried in the mold. The active material layer can be easily formed using the kneaded active material paste. Moreover, since the active material paste is dried in the mold, the weight of the current collector can be reduced.
In particular, according to the present invention, since the active material paste is prepared by kneading the fibers of lead or lead alloy, red lead (Pb 3 O 4 ) and water, it is possible to improve the adhesion between the current collector and the active material layer. It is possible to improve and improve the adhesion between the active material and the fiber.
Further, since the lead or lead alloy fibers are three-dimensionally intersected in the active material layer, the porosity of the active material can be kept high. When the porosity can be maintained high as described above, the content of sulfuric acid in the active material layer can be increased, the capacity can be increased, and particularly, the high rate discharge characteristics of the battery can be improved.
【図１】 本実施例の製造方法の一部分を示す製造工程
図である。FIG. 1 is a manufacturing process diagram showing a part of the manufacturing method of the present embodiment.
【図２】 本実施例の方法で製造した鉛蓄電池用陽極板
の活物質の部分模式拡大図である。FIG. 2 is a partial schematic enlarged view of an active material of an anode plate for a lead storage battery manufactured by the method of this example.
【図３】 他の実施例の製造方法の一部分を示す製造工
程図である。FIG. 3 is a manufacturing process drawing showing a part of a manufacturing method of another embodiment.
１，１０ 金型 ３，３０ 集電体 ６ 鉛合金繊維 ７ 結晶粒子 ８ 細孔 1,10 Mold 3,30 Current collector 6 Lead alloy fiber 7 Crystal particle 8 Pore
Claims (1)
質層を形成する鉛蓄電池用極板の製造方法において、 前記活物質ペーストとして、鉛または鉛合金の繊維と鉛
丹と水とを混練したものを用い、鉛または鉛合金からな
る集電体を所定形状の型内に配置する前または後に前記
活物質ペーストを前記型内に注入し、前記型内で前記活
物質ペーストを乾燥させることを特徴とする鉛蓄電池用
極板の製造方法。1. A method of manufacturing an electrode plate for a lead storage battery, wherein an active material layer is formed by using a kneaded active material paste, wherein the active material paste is kneaded with lead or lead alloy fiber, red lead and water. The active material paste is injected into the mold before or after the current collector made of lead or a lead alloy is placed in the mold having a predetermined shape, and the active material paste is dried in the mold. A method for manufacturing a lead-acid battery electrode plate, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4258348A JPH06111812A (en) | 1992-09-28 | 1992-09-28 | Manufacture of electrode plate for lead-acid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4258348A JPH06111812A (en) | 1992-09-28 | 1992-09-28 | Manufacture of electrode plate for lead-acid battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06111812A true JPH06111812A (en) | 1994-04-22 |
Family
ID=17318996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4258348A Withdrawn JPH06111812A (en) | 1992-09-28 | 1992-09-28 | Manufacture of electrode plate for lead-acid battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06111812A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782905A (en) * | 2009-12-24 | 2012-11-14 | 阿克爱科蒂夫有限公司 | Improvements in lead-acid battery construction |
-
1992
- 1992-09-28 JP JP4258348A patent/JPH06111812A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782905A (en) * | 2009-12-24 | 2012-11-14 | 阿克爱科蒂夫有限公司 | Improvements in lead-acid battery construction |
| JP2013516035A (en) * | 2009-12-24 | 2013-05-09 | アークアクティブ リミテッド | Improvements in the construction of lead acid batteries. |
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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: 19991130 |