JPH0260070A - Sealed lead-acid battery and its manufacture - Google Patents
Sealed lead-acid battery and its manufactureInfo
- Publication number
- JPH0260070A JPH0260070A JP63211530A JP21153088A JPH0260070A JP H0260070 A JPH0260070 A JP H0260070A JP 63211530 A JP63211530 A JP 63211530A JP 21153088 A JP21153088 A JP 21153088A JP H0260070 A JPH0260070 A JP H0260070A
- Authority
- JP
- Japan
- Prior art keywords
- active material
- film
- plate
- anode
- current collector
- 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
- 239000002253 acid Substances 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000011149 active material Substances 0.000 claims abstract description 21
- 239000003792 electrolyte Substances 0.000 claims abstract description 16
- 239000006182 cathode active material Substances 0.000 claims abstract description 14
- 239000006183 anode active material Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 3
- 229920005992 thermoplastic resin Polymers 0.000 abstract description 5
- 229910000978 Pb alloy Inorganic materials 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000012212 insulator Substances 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000126 substance Substances 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
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
- H01M10/126—Small-sized flat cells or batteries for portable equipment
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (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、密閉形鉛蓄電池の薄形化に関するものである
。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to thinning of sealed lead-acid batteries.
従来の技術
近年のポルタプル機器の薄形化に伴い、その電源である
鉛蓄電池に対しても薄形化の要求が高まってきている。BACKGROUND OF THE INVENTION As porta-pull devices have become thinner in recent years, there has been an increasing demand for thinner lead-acid batteries, which are their power source.
このような状況下で、平面よりみた形状が正方形又は長
方形である陽極板、セ・せレータおよび陰極板を同一平
面上に隣接して配置してなる極板群と電解液を蓄電池ケ
ース内に収納した蓄電池が提案されている。これに基づ
いて考えられる構造の一例を第３図に示した。（従来品
）
この場合の電池厚みは、陽極板１、七ノ４レータ４′、
陰極板１０の内の最も厚みが大きい部材の厚みと電槽６
厚みとの相となり、陽極板、セパレータ、陰極板が積層
された構造の電池に比べて薄形化が可能である。Under these circumstances, an electrode plate group consisting of an anode plate, a separator, and a cathode plate that are square or rectangular in shape when viewed from above are arranged adjacent to each other on the same plane, and an electrolyte are placed in a storage battery case. Storage batteries have been proposed. An example of a possible structure based on this is shown in FIG. (Conventional product) In this case, the battery thickness is: 1 anode plate, 4 plates 4',
The thickness of the thickest member of the cathode plate 10 and the battery case 6
Because of the thickness, it is possible to make the battery thinner than a battery with a structure in which an anode plate, a separator, and a cathode plate are stacked.
発明が解決しようとする課題
ところが前述した密閉形鉛蓄電池では、ポータプル機器
に実装した場合、そのエネルギー密度がｌ」・さいため
問題であった。この原因は、その構造と製造法に起因す
る。陽極板１と陰極板１０とセパレータ４′が隣接して
いるため、セパレータ４′ヲ介して対向する陽極＠１と
陰極板１０は、ともに側面に位置する活物質しか放電に
寄与しない。この側面の面積を増加すれば放電容量は増
加するが、側面の面積の増加は厚みの増加となるため、
好ましくない。Problems to be Solved by the Invention However, the above-mentioned sealed lead-acid battery has a problem because its energy density is low when it is mounted in a portable device. This is due to its structure and manufacturing method. Since the anode plate 1, the cathode plate 10, and the separator 4' are adjacent to each other, only the active material located on the side surfaces of the anode @1 and the cathode plate 10, which face each other via the separator 4', contribute to the discharge. Increasing the side surface area increases the discharge capacity, but increasing the side surface area also increases the thickness.
Undesirable.
又、陽極板１、陰極板１０、セパレータ４′の幅を小さ
くすれば、放電電流密度が小さくなるため、放電容量は
増加するが、この幅が小さすぎると精度をかなりよくし
ないと、短絡の危険性があるため、生産技術上限界があ
る。Also, if the widths of the anode plate 1, cathode plate 10, and separator 4' are made smaller, the discharge current density becomes smaller and the discharge capacity increases, but if the widths are too small, short circuits may occur unless the accuracy is improved considerably. Due to the danger, there are limits to production technology.
更Ｋ、陽極板１、陰極板ｌＯ、セパレータ４′を隣接さ
せて各界面の密着状態を良好に保つ方法についても生産
技術上困難であり、放電エネルギー密度が小さい一因と
なっていた。Furthermore, it is also difficult in terms of production technology to maintain good adhesion between the interfaces of the anode plate 1, cathode plate 1O, and separator 4' by adjoining them, which is one reason why the discharge energy density is low.
以上に述べた原因により、従来の電池では、放電エネル
ギー密度が小さく、ポータプル機器用の電源として課題
を残していた。本発明は、この課題を大幅に改善するも
のである。Due to the reasons described above, conventional batteries have a low discharge energy density, which remains a problem as a power source for portable devices. The present invention significantly improves this problem.
課題を解決するだめの手段
本発明では、正極板、セ／？レータおよび負極板を同一
平面上に隣接して配置するのではなく、シート状もしく
はフィルム状の集電体の少なくとも１ケ所以上に陽極活
物質もしくは陰極活物質のどちらか一方が配置され、こ
の活物質が配置されていない部分に、もう一方の活物質
が配置された極板が、絶縁ノΔを介して接合され、シー
ト状もしくはフィルム状の集電体に配置された活物質を
包むように電解質保持層が当接されて構成されたことを
特徴とするものである。（本発明品１）又、シート状も
しくはフィルム状の集電体に、少なくとも１ケ所以上の
穴をあけたフィルム状の絶縁性樹脂が接合され、この穴
部に、陽極活物質もしくは陰極活物質のどちらか一方が
配置され、もう一方の活物質が配置された極板が前記樹
脂部に接合され、シート状もしくはフィルム状の集電体
に配置された活物質を包むように電解質保持体が当接さ
れて構成されたことを特徴とするものである。（本発明
品２）
作用
本発明においては、陽極活物質あるいは陰極活物質がシ
ート状あるいはフィルム状の集電体に配置され、それを
包むように電解質保持層が配置されているため、片方の
活物質は利用率が上昇して容量が大きくなシ、電解質保
持層がかぶせられるための嵌合も容易である。又、絶縁
層を、穴をあけたフィルム状の絶縁性樹脂を用いること
によＱ、更に作成し易くなシ、容量の低下も少なく、寿
命特性も向上する。また、一方の極板が他方の集電体と
接合されているため、電槽挿入時等においても、極板が
ずれることがなく、電解質保持層との密着性も保持され
る。Means for Solving the Problems In the present invention, the positive electrode plate, se/? Instead of arranging the electrode plate and the negative electrode plate adjacent to each other on the same plane, either the anode active material or the cathode active material is arranged in at least one place on a sheet-like or film-like current collector. The electrode plate on which the other active material is placed is connected to the part where no substance is placed through the insulation gap, and the electrolyte is applied so as to surround the active material placed on the sheet-like or film-like current collector. It is characterized in that the holding layer is in contact with the holding layer. (Product 1 of the present invention) In addition, a film-like insulating resin with at least one hole is bonded to a sheet-like or film-like current collector, and an anode active material or a cathode active material is inserted into the hole. The electrode plate on which the other active material is placed is bonded to the resin part, and the electrolyte holder is placed so as to wrap the active material placed on the sheet-like or film-like current collector. It is characterized by being constructed in such a way that they are in contact with each other. (Product of the present invention 2) Effect In the present invention, the anode active material or the cathode active material is arranged on a sheet-like or film-like current collector, and the electrolyte holding layer is arranged so as to wrap it. The material has an increased utilization rate and a large capacity, and is also easy to fit over with an electrolyte retaining layer. Furthermore, by using a film-like insulating resin with holes for the insulating layer, it is easier to create, the capacity decreases less, and the life characteristics are improved. Furthermore, since one electrode plate is joined to the other current collector, the electrode plate does not shift even when inserted into a battery case, and the adhesion with the electrolyte holding layer is maintained.
実施例
本発明品１、本発明品２および従来品を厚さ１間の電池
として、それぞれ２０個ずつ作成した。EXAMPLE 20 batteries each of the present invention product 1, the present invention product 2, and the conventional product were prepared with a thickness of 1 mm.
本発明品１は、第１図（ａ） 、 （ｂ）に示すように
、鉛または鉛合金より成る陰極集電体２に、陰極活物質
３を形成し、陰極活物質３を形成していない部分に、陽
極板１を絶縁層５（本実施例ではエポキシ樹脂）を介し
て接合し、陰極活物質３を包むように電解質保持層４を
当接することによシ極板群を形成し、この極板群を熱可
塑性樹脂フィルムにより包み込み、フィルム周囲を熱溶
着（熱浴着部８）して電槽６を形成し、電池とした。As shown in FIGS. 1(a) and 1(b), the product 1 of the present invention has a cathode active material 3 formed on a cathode current collector 2 made of lead or a lead alloy. A cathode plate group is formed by joining the anode plate 1 to the portion where the anode plate 1 is not present via an insulating layer 5 (epoxy resin in this example) and abutting the electrolyte holding layer 4 so as to wrap the cathode active material 3. This electrode plate group was wrapped in a thermoplastic resin film, and the periphery of the film was thermally welded (thermal bath bonding part 8) to form a battery case 6, thereby producing a battery.
本発明品２は、第２図（ａ） 、 （ｂ）に示すように
、鉛または鉛合金上り成る陰極集電体２に、穴をあけた
ポリプロピレンフィルム（厚さ１００μｍ）の絶縁性樹
脂９ｆｔ接合し、この穴部に、陰極活物質３を形成し、
陰極活物質３を形成していない部分、つまシ絶縁性樹脂
９の表面に、陽極板１を接合し、陰極活物質３を包むよ
うに電解質保持層４を当接して極板群を形成し、この極
板群を熱可塑性樹脂フィルムによυ包み込み、フィルム
周囲を熱溶着（熱溶着部８）して電槽６を形成し、電池
とした。As shown in FIGS. 2(a) and 2(b), the product 2 of the present invention consists of a cathode current collector 2 made of lead or a lead alloy, and a 9 ft. and form a cathode active material 3 in this hole,
The anode plate 1 is bonded to the surface of the insulating resin resin 9 in the portion where the cathode active material 3 is not formed, and the electrolyte holding layer 4 is brought into contact with the cathode active material 3 so as to surround it to form an electrode plate group. This electrode plate group was wrapped in a thermoplastic resin film, and the periphery of the film was thermally welded (thermal welding part 8) to form a battery case 6, thereby producing a battery.
尚、７は安全弁である。Note that 7 is a safety valve.
従来品は、第３図に示したが、１枚の熱可塑性樹脂フィ
ルム上に１陽極叛１１陰極板１０、セＡ？レータ４′ヲ
置き、その上からもう１枚の熱可塑性樹脂フィルムを置
き、２枚のフィルムの周囲を熱浴着（熱溶着部８）し、
電槽６を形成し、電池とした。The conventional product, shown in Fig. 3, has 1 anode plate, 11 cathode plate 10, and a cell plate on one thermoplastic resin film. Layer 4' is placed, another thermoplastic resin film is placed on top of it, and the periphery of the two films is hot bath bonded (thermal welding part 8).
A battery case 6 was formed to serve as a battery.
なお、従来品の作成時には、熱溶着時に、陽極板１と陰
極板１０に対する電解質保持層４の接触部がずれる現象
が認めら扛、電池作成は内錐をきわめた。It should be noted that in the production of the conventional product, a phenomenon in which the contact portions of the electrolyte retaining layer 4 with respect to the anode plate 1 and the cathode plate 10 were shifted during thermal welding was observed, and the battery production was completed with an inner cone.
また、各電池ともに、活物質の幅は５止、陽極板１と陰
極活物質３の距離は５顛とした。Further, in each battery, the width of the active material was 5 mm, and the distance between the anode plate 1 and the cathode active material 3 was 5 mm.
それぞれの電池６１０個ずつの初期容量を測定した。結
果を第４図に示す。本発明品１，２に比べて従来品は容
量が少なく、又測定値にばらつきが大きい。これは、陽
極板、陰極板および七ノ４レータが同一平面上に配置さ
れているため、陽極板、陰極板とセパレータが極板側面
だけで接触するため、接触面積が小さく、容量が小さく
なり、又、陽極板、陰極板とセノ！レータの嵌合が誰し
く、嵌合状態が不完全なために、測定値にばらつきが生
じるためである。又、本発明品１に比べて本発明品２の
初期容量が少し小さいのは、集電体表面に配置されたフ
ィルム状の絶縁性樹脂の厚み分だけ活物質と電解質保持
１１との接触面積が小さくなったためである。The initial capacity of each of 610 batteries was measured. The results are shown in Figure 4. Compared to products 1 and 2 of the present invention, the conventional product has a smaller capacity, and the measured values vary widely. This is because the anode plate, cathode plate, and seven-layer plate are arranged on the same plane, so the anode plate, cathode plate, and separator contact only on the sides of the plate, resulting in a small contact area and a small capacity. , Also, anode plate, cathode plate and Seno! This is because the measured values vary because the rotor is not properly fitted and the fitted state is incomplete. Furthermore, the reason why the initial capacity of the present invention product 2 is a little smaller than that of the present invention product 1 is because the contact area between the active material and the electrolyte holding member 11 is equivalent to the thickness of the film-like insulating resin placed on the current collector surface. This is because it has become smaller.
次に、各電池それぞれ１０個ずつを、
放電条件 ３０ｍＡ、放電終止電圧１．６■充電条件
２．４５Ｖ定電圧、制限電流１５ ｍＡ 、 １６ｈ
ｒ温度 ２５℃
という条注で充放電寿命試験を行った。結果を第５図に
示す。従来品に比べて本発明品１および２の寿命はいず
ｎも、約２倍で奉った。これは、従来品は、陽極板、陰
極板とセパレータの接触面積が小さいため、放電電流密
度が大きくなり、活物質の劣化が早くなシ、又嵌合状態
が不均一でセ・母レークが密着していない陰極活物質が
硫酸鉛化するためである。これらの理由によって容量低
下が早くなっている。Next, 10 of each battery were charged under discharging conditions of 30 mA and final discharge voltage of 1.6 ■charging conditions.
2.45V constant voltage, limited current 15 mA, 16h
A charge/discharge life test was conducted at a temperature of 25°C. The results are shown in Figure 5. Compared to conventional products, the lifespan of products 1 and 2 of the present invention was approximately twice as long. This is because in conventional products, the contact area between the anode plate, cathode plate, and separator is small, resulting in a high discharge current density and rapid deterioration of the active material. This is because the cathode active material that is not in close contact becomes lead sulfate. For these reasons, the capacity decreases quickly.
発明の効果
上記のように、本発明品１および２は高容量化、長寿命
化が可能であり、かつ、いかなる電槽形成法を用いても
、陽極、陰極電解質の密着性が損われないため、特性の
ばらつきが小さい等、工業的価値が非常に高いものであ
る。Effects of the Invention As described above, products 1 and 2 of the present invention can have a high capacity and a long life, and the adhesion between the anode and cathode electrolytes is not impaired no matter what method of forming the battery case is used. Therefore, it has very high industrial value, such as small variations in properties.
第１図は本発明の一実施例（本発明品１）を示す（、）
正面図、（ｂ） Ａ −Ａ断面図、第２図は本発明の他
の実施例（本発明品２）を示す（ａ）正面図、（ｂ）
Ｂ −Ｂ断面図、第３図は従来の密閉形鉛蓄電池（従来
品）を示す断面図、
第４図は初期容量試験の結果を示す比較図、第５図は充
放電サイクル寿命試験の結果を示す４は電解質保持ノー
、５は絶縁ノー、６は電槽、７は安全弁、８は熱溶着部
、９は絶縁性樹脂、１０は陰極板Figure 1 shows an embodiment of the present invention (invention product 1) (,)
Front view, (b) A-A sectional view, (a) Front view, (b) Fig. 2 shows another embodiment of the present invention (invention product 2).
B-B sectional view, Figure 3 is a sectional view of a conventional sealed lead-acid battery (conventional product), Figure 4 is a comparison diagram showing the results of the initial capacity test, and Figure 5 is the result of the charge/discharge cycle life test. 4 indicates electrolyte retention, 5 indicates insulation, 6 indicates battery case, 7 indicates safety valve, 8 indicates heat welding part, 9 indicates insulating resin, 10 indicates cathode plate
Claims (4)
も１ケ所以上に陽極活物質もしくは陰極活物質のどちら
か一方が配置され、この活物質が配置されていない部分
に、もう一方の活物質が配置された極板が、絶縁層を介
して接合され、シート状もしくはフィルム状の集電体に
配置された活物質を包むように電解質保持層が当接され
て構成されたことを特徴とする密閉形鉛蓄電池。(1) Either an anode active material or a cathode active material is placed in at least one location of a sheet-like or film-like current collector, and the other active material is placed in a portion where this active material is not placed. A sealed structure characterized in that the arranged electrode plates are joined through an insulating layer, and an electrolyte holding layer is brought into contact with the active material arranged on a sheet-like or film-like current collector so as to enclose the active material. lead-acid battery.
ート状もしくはフィルム状の集電体の活物質が配置され
ていない部分に配置されたことを特徴とする特許請求の
範囲第１項記載の密閉形鉛蓄電池。(2) Claim 1, characterized in that the insulating layer is a film-like insulating resin and is arranged in a portion of a sheet-like or film-like current collector where no active material is arranged. Sealed lead-acid batteries as described in section.
も１ケ所以上に陽極活物質もしくは陰極活物質のどちら
か一方を形成し、この活物質を形成していない部分に、
もう一方の活物質を形成した極板を、絶縁層を介して接
合し、シート状もしくはフィルム状の集電体に配置され
た活物質を包むように電解質保持層を当接して構成する
ことを特徴とする密閉形鉛蓄電池の製造法。(3) Either an anode active material or a cathode active material is formed on at least one location of a sheet-like or film-like current collector, and on the part where this active material is not formed,
The electrode plate with the other active material formed thereon is joined via an insulating layer, and an electrolyte holding layer is brought into contact with the active material arranged on a sheet-like or film-like current collector. A manufacturing method for a sealed lead-acid battery.
とも１ケ所以上に穴をあけたフィルム状の絶縁性樹脂を
あらかじめ接合しておき、この穴部に、陽極活物質もし
くは陰極活物質のどちらか一方を形成し、この活物質を
形成していない絶縁性樹脂部に、もう一方の活物質を形
成した極板を接合することを特徴とする特許請求の範囲
第３項記載の密閉形鉛蓄電池の製造法。(4) A film-like insulating resin with holes in at least one place is bonded to a sheet-like or film-like current collector in advance, and either the anode active material or the cathode active material is inserted into the hole. The sealed lead according to claim 3, characterized in that the electrode plate formed with the other active material is bonded to the insulating resin portion on which the active material is not formed. Method of manufacturing storage batteries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63211530A JPH0650648B2 (en) | 1988-08-25 | 1988-08-25 | Sealed lead acid battery and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63211530A JPH0650648B2 (en) | 1988-08-25 | 1988-08-25 | Sealed lead acid battery and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0260070A true JPH0260070A (en) | 1990-02-28 |
| JPH0650648B2 JPH0650648B2 (en) | 1994-06-29 |
Family
ID=16607405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63211530A Expired - Lifetime JPH0650648B2 (en) | 1988-08-25 | 1988-08-25 | Sealed lead acid battery and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0650648B2 (en) |
-
1988
- 1988-08-25 JP JP63211530A patent/JPH0650648B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0650648B2 (en) | 1994-06-29 |
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