JPH01149376A - Sealed lead-acid battery - Google Patents
Sealed lead-acid batteryInfo
- Publication number
- JPH01149376A JPH01149376A JP62307846A JP30784687A JPH01149376A JP H01149376 A JPH01149376 A JP H01149376A JP 62307846 A JP62307846 A JP 62307846A JP 30784687 A JP30784687 A JP 30784687A JP H01149376 A JPH01149376 A JP H01149376A
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- separator
- positive
- plate
- charging
- 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.)
- Pending
Links
- 239000002253 acid Substances 0.000 title claims description 9
- 239000002952 polymeric resin Substances 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 238000007600 charging Methods 0.000 abstract description 25
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 12
- 229910001882 dioxygen Inorganic materials 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 229910003307 Ni-Cd Inorganic materials 0.000 abstract 1
- 229920006254 polymer film Polymers 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 238000010277 constant-current charging Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- -1 etc. Chemical compound 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/34—Gastight accumulators
- H01M10/342—Gastight lead accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ボータグ〃機器用として、あるいは防災用と
して広く用いられている密閉型鉛蓄電池に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a sealed lead-acid battery that is widely used for Botag equipment or for disaster prevention.
従来の技術
密閉型鉛蓄電池は、高い経済性と取シ扱いの手軽さから
、ポータプルビデオをはじめとする多くノホータプル機
器の電源として用いられている。BACKGROUND OF THE INVENTION Sealed lead-acid batteries are used as power sources for many portable devices, including portable videos, due to their high cost efficiency and ease of handling.
この種の用法において、電池に要求される特性はハンド
リングが容易で、繰り返しのサイクル寿命に優れている
ことである。In this type of usage, the characteristics required of the battery are easy handling and good repeated cycle life.
密閉型鉛蓄電池の充電方法としては、定電圧充電方式、
■テーパー充電方式などが一般的に用いられているが、
より短時間で充電するためにＮｉ／Ｃｄ電池の充電に用
いられる、−Δ■方式による充電が求められている。Charging methods for sealed lead-acid batteries include constant voltage charging,
■Taper charging method etc. are commonly used,
In order to charge in a shorter time, there is a demand for charging using the -Δ■ method, which is used for charging Ni/Cd batteries.
発明が解決しようとする問題点
密閉型鉛蓄電池の充電は、充電終了とともに充電電流が
順々に減少していく定電圧方式、あるいはＶテーパ一方
式が一般的である。これは、充電終了とともに正極板か
ら発生する酸素ガスを負極板にて吸収する反応過程にお
いて、充電電流が大きく、発生する酸素ガヌが多量であ
る場合は、負極板の酸素吸収能力に限界があるためであ
る。したがって、比較的コストの低い定電流充電方式に
よって密閉型鉛蓄電池を短時間で急速充電するためには
、充電中における正極板からの酸素ガスの発生の抑制お
よび負極板の酸素ガス吸収能力を向上させる必要があっ
た。Problems to be Solved by the Invention Sealed lead-acid batteries are generally charged using a constant voltage method in which the charging current is gradually decreased as charging ends, or a V-taper method. This is because during the reaction process in which the negative electrode plate absorbs oxygen gas generated from the positive electrode plate when charging is completed, if the charging current is large and a large amount of oxygen gas is generated, there is a limit to the oxygen absorption capacity of the negative electrode plate. This is because there is. Therefore, in order to rapidly charge a sealed lead-acid battery in a short time using a relatively low-cost constant current charging method, it is necessary to suppress the generation of oxygen gas from the positive electrode plate during charging and improve the oxygen gas absorption capacity of the negative electrode plate. I needed to do it.
負極板の酸素ガス吸収能力を高めるために、従来は電解
液量を規制し、遊離の電解液がない状態とするとともに
、負極活物質の活性度を高める工夫がなされていた。し
かし、この方法によれば、電池の活物質の利用率が低下
し、放電容量が小さくなる、長期保存特性時の自己放電
が大きい、充放電サイクル寿命が短いなどの電池性能の
劣化がみられた。また、負極板のセパレータと接してい
ない面は高分子多層フィルムあるいは樹脂製電槽と接し
ているため、電解液の分布、拡散が十分ではなく、酸素
ガスの吸収能力が十分に生かされているとはいえなかっ
た。In order to increase the oxygen gas absorption capacity of the negative electrode plate, conventional efforts have been made to regulate the amount of electrolyte so that there is no free electrolyte and to increase the activity of the negative electrode active material. However, this method causes deterioration in battery performance, such as a decrease in the utilization rate of the battery's active material, a decrease in discharge capacity, a large self-discharge during long-term storage characteristics, and a short charge-discharge cycle life. Ta. In addition, because the surface of the negative electrode plate that is not in contact with the separator is in contact with the polymer multilayer film or the resin battery case, the distribution and diffusion of the electrolyte is not sufficient, and the oxygen gas absorption ability is not fully utilized. I couldn't say that.
本発明は上記の問題点の解決をはかり、比較的大きな定
電流充電時においても正極板からの酸素ガスの発生を抑
制し、同時に負極板における酸素ガス吸収能力を活発に
してＮｉ／Ｃｄ電池と同じ、−ΔＶ充電方式による充電
を可能とするものである。The present invention aims to solve the above problems, and suppresses the generation of oxygen gas from the positive electrode plate even during relatively large constant current charging, and at the same time activates the oxygen gas absorption ability of the negative electrode plate, thereby improving the performance of Ni/Cd batteries. This enables charging using the same -ΔV charging method.
問題点を解決するための手段
本発明は、前記問題点の解決をはかるため、正極板と負
極板の構成枚数を１：１とした密閉型鉛蓄電池において
、正極板と負極板のセパレータを一介して各々対向しな
いｌ裏面にもセパレータを設けることを特徴とし、正極
板の充電中の電流密度を小さくするとともに、負極板の
酸素ガス吸収能力の向上を図ったものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a sealed lead-acid battery in which the number of positive and negative plates is 1:1, in which the separators of the positive and negative plates are made one. This is characterized in that a separator is also provided on the back surface of the battery which does not face each other through the battery, in order to reduce the current density during charging of the positive electrode plate and to improve the oxygen gas absorption ability of the negative electrode plate.
作 用
正極板と負極板のセパレータを介して各々対向しない裏
面にもセパレータを設けることによシ、従来高分子樹脂
多層フィルムと接していた負極板の裏面でも十分な酸素
吸収反応を行なうことが可能となり、また、正極板上で
の充電電流密度を小さくすることができるため、充電中
の酸素ガス発生の抑制が可能となシ、Ｎｉ／Ｃｄ電池と
同じ−Δ■充電方式による急速充電が可能となる。By providing a separator on the back surfaces of the positive and negative electrode plates that do not face each other through the separator, it is possible to carry out a sufficient oxygen absorption reaction even on the back surface of the negative electrode plate, which was conventionally in contact with the polymer resin multilayer film. In addition, since the charging current density on the positive electrode plate can be reduced, it is possible to suppress the generation of oxygen gas during charging. It becomes possible.
実施例 以下に本発明の詳細な説明する。Example The present invention will be explained in detail below.
Ｐｂ−Ｃａ−８ｎ合金よりなる格子体に、酸化鉛、水、
希硫酸等を練シ合わせてなるペーストを充填し、化成し
た正極板１枚と、Ｐｂ−Ｃａ−８ｎ合金よシなる格子体
に、酸化鉛、硫酸バリウム、有機繊維、水および希硫酸
等を練シ合せてなるペーストを充填し、化成した負極板
１枚を用意し、これらの極板間に厚さ１．５ ｍ（２０
ｈ ／ｄ７７／加圧時、加工時じ）の微細なガラス繊維
からなる多孔性セパレータを挿入して極板群を構成した
。極板群は高分子多層フィルムに収納し、電解液として
比重１．３４ （２０’ｔ： ）の希硫酸を用いて、１
０■、１．１ＡＨの電池を作成した。以上のようにして
作成した従来品電池に対し、本発明品は、正極板１と負
極板２の間に挿入するセパレータ３ａの厚さを１．２ｍ
１ｌｌとし、負極板２の正極板１と対面せずに、高分子
樹脂多層フィルム７と接する裏面に、負極板２とフィル
ム７との間に厚さｏ、ｓｍｍのセパレータ３ｂを挿入し
、正極板１とフィルム７との間にもセパレータ３Ｃを挿
入し、同様に組立、１ｏ■、１．１ＡＨの電池を作成し
た。第１図に本発明による極板群の斜視図を示す。図中
４．５は正負の極これらの電池を−ΔＶ充電方式によっ
て充放電サイクルを行なった。充電は、０．８Ａの定電
流により行ない、充電終了時において電池電圧がピーク
になった時点の電圧を充電器内の記憶回路に記憶させ、
その後の電池電圧の減少がピーク電圧から１００ｍＶと
なった時点で充電終了とし、電流が流れない制御機能を
持つ−Δ■充電器を用いた。放電は、１２Ωの定抵抗を
用い、放電電圧が８．８ｖになるまで連続放電すること
とした。Lead oxide, water,
Filled with a paste made by kneading dilute sulfuric acid, etc., lead oxide, barium sulfate, organic fibers, water, dilute sulfuric acid, etc. were added to one positive electrode plate and a lattice made of Pb-Ca-8n alloy. Prepare one negative electrode plate that has been filled with a paste made by kneading and chemically formed, and place a 1.5 m (20 m) thick plate between these electrode plates.
A porous separator made of fine glass fibers of h/d77/during pressurization and processing) was inserted to form an electrode plate group. The electrode plate group was housed in a polymer multilayer film, and diluted sulfuric acid with a specific gravity of 1.34 (20't: ) was used as the electrolyte.
0■, 1.1AH batteries were prepared. In contrast to the conventional battery produced as described above, the product of the present invention has a separator 3a inserted between the positive electrode plate 1 and the negative electrode plate 2 with a thickness of 1.2 m.
1ll, and insert a separator 3b with a thickness of o, smm between the negative electrode plate 2 and the film 7 on the back side of the negative electrode plate 2, which does not face the positive electrode plate 1 but is in contact with the polymer resin multilayer film 7, and A separator 3C was also inserted between the plate 1 and the film 7, and assembled in the same manner to produce a 1O2, 1.1AH battery. FIG. 1 shows a perspective view of an electrode plate group according to the present invention. In the figure, 4.5 indicates positive and negative poles.These batteries were subjected to charging/discharging cycles using a -ΔV charging method. Charging is performed with a constant current of 0.8 A, and the voltage at the time when the battery voltage reaches its peak at the end of charging is stored in a memory circuit in the charger.
Charging was terminated when the battery voltage decreased to 100 mV from the peak voltage, and a -Δ■ charger with a control function that prevents current flow was used. Discharge was performed using a constant resistance of 12Ω, and continuous discharge was performed until the discharge voltage reached 8.8V.
第２図に従来品と本発明品の充放電サイクル寿命を示す
。Figure 2 shows the charge/discharge cycle life of the conventional product and the product of the present invention.
本発明によれば、充電時のガス吸収能力が向上されるた
め、電解液が電気分解されることによって生じる電池の
重量減少も小さく、優れたサイクル寿命特性が得られた
。また、第３図には、サイクル寿命試験中の充電電圧を
示すが、本発明品は充放電サイクルを繰り返しても−Δ
Ｖ特性が良好に得られた。According to the present invention, since the gas absorption ability during charging is improved, the weight loss of the battery due to electrolysis of the electrolyte is small, and excellent cycle life characteristics are obtained. In addition, Fig. 3 shows the charging voltage during the cycle life test, and the product of the present invention has -Δ
Good V characteristics were obtained.
発明の効果
以上の説明から明らかなように、本発明によれば、負極
板における酸素吸収能力を向上させることが可能になシ
、Ｎ ｉ ／Ｃｄ電池と共通な−ΔＶ充電方式によって
もサイクル寿命の優れた密閉型鉛蓄電池を提供すること
ができる。Effects of the Invention As is clear from the above explanation, according to the present invention, it is possible to improve the oxygen absorption capacity of the negative electrode plate, and the cycle life can also be improved by using the -ΔV charging method common to Ni/Cd batteries. It is possible to provide an excellent sealed lead-acid battery.
第１図に本発明による電池の単セルの斜視図、第２図は
充放電サイクル寿命を示す図、第３図は充電中の電池電
圧を示す図である。
１・・・・・・正極板、２・・・・・・負極板、３ａ、
３ｂ、３ｃ・・・・・・セパレータ、４・・・・・・正
極極柱、６・・・・・・負極極柱、６・・・・・・安全
弁、７・・・・・・高分子樹脂多層フィルム。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名７−
−−正社板
２− 負屍板
３α、３ム、３ｃｍ セパレータ
４、ｓ−−一梗柱
６−安全弁
７− 高今子謝脂多層フィルム
第１図
錘＝１ｍ−乗一
区 殖賎む郊
第３図
充電時間 （会）FIG. 1 is a perspective view of a single cell of a battery according to the present invention, FIG. 2 is a diagram showing the charge/discharge cycle life, and FIG. 3 is a diagram showing the battery voltage during charging. 1...Positive electrode plate, 2...Negative electrode plate, 3a,
3b, 3c...Separator, 4...Positive pole, 6...Negative pole, 6...Safety valve, 7...High Molecular resin multilayer film. Name of agent: Patent attorney Toshio Nakao and 1 other person7-
--Seisha board 2- Negative corpse board 3α, 3mu, 3cm Separator 4, s--Ikkyo pillar 6-Safety valve 7- Takaimako Xiaxi multilayer film Figure 1 Weight = 1m - 1 section Figure 3 Charging time (meeting)
Claims (2)
の負極板とを備え、負極板と正極板の各々が対向しない
面にもそれぞれセパレータを設けたことを特徴とする密
閉型鉛蓄電池。(1) A sealed lead which is characterized by having one positive electrode plate and one negative electrode plate facing each other with a separator in between, and also having a separator provided on each side of the negative electrode plate and the positive electrode plate, which do not face each other. Storage battery.
分子樹脂の多層フィルムによって被覆、収納したことを
特徴とする特許請求の範囲第１項記載の密閉型鉛蓄電池
。(2) The sealed lead-acid battery according to claim 1, wherein the electrode plate group consisting of a positive electrode plate, a negative electrode plate, and a separator is covered and housed with a multilayer film of polymer resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62307846A JPH01149376A (en) | 1987-12-04 | 1987-12-04 | Sealed lead-acid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62307846A JPH01149376A (en) | 1987-12-04 | 1987-12-04 | Sealed lead-acid battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01149376A true JPH01149376A (en) | 1989-06-12 |
Family
ID=17973890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62307846A Pending JPH01149376A (en) | 1987-12-04 | 1987-12-04 | Sealed lead-acid battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01149376A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01298655A (en) * | 1988-05-26 | 1989-12-01 | Matsushita Electric Ind Co Ltd | Sealed lead storage battery |
| JPH0495360A (en) * | 1990-07-31 | 1992-03-27 | Shin Kobe Electric Mach Co Ltd | Closed type lead storage battery |
| JPH04102564U (en) * | 1991-02-08 | 1992-09-03 | 新神戸電機株式会社 | Thin sealed lead acid battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5491730A (en) * | 1977-12-29 | 1979-07-20 | Matsushita Electric Ind Co Ltd | Method of producing small lead storage battery |
| JPS5765677A (en) * | 1980-10-07 | 1982-04-21 | Matsushita Electric Ind Co Ltd | Sealed lead acid battery |
| JPS6110866A (en) * | 1984-06-27 | 1986-01-18 | Matsushita Electric Ind Co Ltd | Sealed lead storage battery |
| JPS6229074A (en) * | 1985-07-31 | 1987-02-07 | Shin Kobe Electric Mach Co Ltd | Enclosed lead storage battery |
-
1987
- 1987-12-04 JP JP62307846A patent/JPH01149376A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5491730A (en) * | 1977-12-29 | 1979-07-20 | Matsushita Electric Ind Co Ltd | Method of producing small lead storage battery |
| JPS5765677A (en) * | 1980-10-07 | 1982-04-21 | Matsushita Electric Ind Co Ltd | Sealed lead acid battery |
| JPS6110866A (en) * | 1984-06-27 | 1986-01-18 | Matsushita Electric Ind Co Ltd | Sealed lead storage battery |
| JPS6229074A (en) * | 1985-07-31 | 1987-02-07 | Shin Kobe Electric Mach Co Ltd | Enclosed lead storage battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01298655A (en) * | 1988-05-26 | 1989-12-01 | Matsushita Electric Ind Co Ltd | Sealed lead storage battery |
| JPH0495360A (en) * | 1990-07-31 | 1992-03-27 | Shin Kobe Electric Mach Co Ltd | Closed type lead storage battery |
| JPH04102564U (en) * | 1991-02-08 | 1992-09-03 | 新神戸電機株式会社 | Thin sealed lead acid battery |
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