JPH02236963A - Sealed lead-acid battery - Google Patents
Sealed lead-acid batteryInfo
- Publication number
- JPH02236963A JPH02236963A JP1057075A JP5707589A JPH02236963A JP H02236963 A JPH02236963 A JP H02236963A JP 1057075 A JP1057075 A JP 1057075A JP 5707589 A JP5707589 A JP 5707589A JP H02236963 A JPH02236963 A JP H02236963A
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- positive
- active material
- negative
- electrode
- 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 9
- 239000003792 electrolyte Substances 0.000 claims abstract description 36
- 239000011347 resin Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011149 active material Substances 0.000 claims abstract description 10
- 239000011245 gel electrolyte Substances 0.000 claims description 14
- 230000002745 absorbent Effects 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 claims description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- 239000000835 fiber Substances 0.000 abstract description 5
- 239000007773 negative electrode material Substances 0.000 abstract description 5
- 239000007774 positive electrode material Substances 0.000 abstract description 5
- 239000004745 nonwoven fabric Substances 0.000 abstract description 2
- 230000000717 retained effect Effects 0.000 abstract description 2
- 239000012784 inorganic fiber Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 5
- 239000007772 electrode material Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 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
-
- 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
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ポータブル機器などの小型機器に用いること
のできる密閉形鉛蓄電池の構造に関するものである．
従来の技術
従来、密閉形鉛蓄電池の構造は、電解液保持体であるセ
パレータなどを介して，正極板と負極板を積層した構造
となっている．しかしながら，この構造では、近年の機
器の小型化に伴う密閉形鉛蓄電池の薄形化要求に対して
、既に限界にきている．そこで，第５図に示すような、
同一平面上に正極１と負極２を電解液を保持したセパレ
ータ１０を介して配置し，全体を樹脂製フィルム８で密
封した密閉形釦蓄電池の構造が提案されている．（比較
品）
発明が解決しようとする課題
上記提案による密閉形鉛蓄電池は，厚さの面でかなり簿
くすることができるようになった．しかしながら、同一
平面上で，必要量の電解液を保持したセパレータを介し
て正極と負極を配置するために，極間が離れすぎてセパ
レータ中の電解液抵抗が大きくなる欠点があり，また，
電解液との接触が活物質全体に及びにくいので、容量が
非常に小さいという欠点を有している．本発明は，上記
の問題を解決し，さらに高容斌化を可能にするような密
閉形鉛蓄電池を提供することを目的とする．
課題を解決するための手段
本発明は，同一平面上に設巴した正極と負極の活物質間
に、電解液を含浸した高吸水性樹脂又はゲル状電解質を
有し、前記正極及び負極の活物質面と前記高吸水性樹脂
又はゲル状電解質面の上部にわたって電解液保持層を設
けたことを特徴とするものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure of a sealed lead-acid battery that can be used in small devices such as portable devices. Conventional technology Conventionally, the structure of a sealed lead-acid battery is a structure in which a positive electrode plate and a negative electrode plate are stacked with a separator, which is an electrolyte holding body, interposed therebetween. However, this structure has already reached its limit in meeting the demand for thinner sealed lead-acid batteries due to the miniaturization of devices in recent years. Therefore, as shown in Figure 5,
A sealed button storage battery structure has been proposed in which a positive electrode 1 and a negative electrode 2 are placed on the same plane with a separator 10 holding an electrolyte in between, and the entire structure is sealed with a resin film 8. (Comparative product) Problems to be solved by the invention The sealed lead-acid battery proposed above can now be made considerably smaller in terms of thickness. However, since the positive and negative electrodes are placed on the same plane with a separator holding the required amount of electrolyte in between, there is a drawback that the electrodes are too far apart, increasing the resistance of the electrolyte in the separator.
Since it is difficult for the entire active material to come into contact with the electrolyte, it has the disadvantage of very low capacity. An object of the present invention is to provide a sealed lead-acid battery that solves the above problems and also enables higher capacity. Means for Solving the Problems The present invention has a super absorbent resin or gel electrolyte impregnated with an electrolytic solution between the active materials of the positive and negative electrodes disposed on the same plane. It is characterized in that an electrolyte holding layer is provided over the material surface and the superabsorbent resin or gel electrolyte surface.
作用
本発明は、上記の特徴を有することにより、放電時には
、電解液保持層を通じて電池反応が持続し、充電時には
，前記高吸水性樹脂又はゲル状電解質を通じて直接対極
へのガス吸収反応が進行するので、正極と負極が接触す
る電池反応に必要な電解液量を常に確保できる．実施例
本発明の一実施例について説明する．
第１図は，本発明の密閉形蓄電池に関する第１の実施例
としてその縦断面図を示すもので，１は正極、２は負極
、３は正極活物質，４は正極集電体、５は電解液保持層
、６は負極活物質、７は負極集電体、８は樹脂製フィル
ム、９はゲル状電解質である．
第１図の実施例において、正極１と負極２がその間にゲ
ル状電解質９を介して同一平面上に設置され、各極活物
質３、６面下部に各極隻電体４、７を有し、各極活物質
３，６面とゲル状電解質９面上部にわたって無機繊維又
は有機繊維を主体とする不織布が電解液保持）ＦＪ ５
として配置され、全体が気密性を有する樹脂製フィルム
８で密封されている。（本発明品１）ゲル状電解質９は
、シリカ粒子を分散させた水溶液に゛市解液を加えて撹
拌し，ゾル状態で各極１、２間に充填した後ゲル化した
ものである．電解液保持Ｎ５の不織布としては、ガラス
繊維のほかアルミナ繊維，ジルコニア繊維，ポリプロピ
レン繊維、ポリエステル繊維、アクリル繊維等を使用す
ることができる。Operation The present invention has the above features, so that during discharging, the battery reaction continues through the electrolyte holding layer, and during charging, the gas absorption reaction progresses directly to the counter electrode through the superabsorbent resin or gel electrolyte. Therefore, the amount of electrolyte required for the battery reaction in which the positive and negative electrodes are in contact can always be secured. Example An example of the present invention will be explained. FIG. 1 shows a vertical cross-sectional view of a first embodiment of the sealed storage battery of the present invention, in which 1 is a positive electrode, 2 is a negative electrode, 3 is a positive electrode active material, 4 is a positive electrode current collector, and 5 is a positive electrode current collector. An electrolytic solution holding layer, 6 a negative electrode active material, 7 a negative electrode current collector, 8 a resin film, and 9 a gel electrolyte. In the embodiment shown in FIG. 1, a positive electrode 1 and a negative electrode 2 are installed on the same plane with a gel electrolyte 9 interposed between them, and each electrode has an electric body 4, 7 at the bottom of the surface of each electrode active material 3, 6. (FJ 5
The entire structure is sealed with an airtight resin film 8. (Product 1 of the present invention) Gel electrolyte 9 is obtained by adding a city solution to an aqueous solution in which silica particles are dispersed, stirring the mixture, filling it in a sol state between electrodes 1 and 2, and then gelling it. In addition to glass fibers, alumina fibers, zirconia fibers, polypropylene fibers, polyester fibers, acrylic fibers, and the like can be used as the electrolyte-retaining nonwoven fabric N5.
正極活物質３は、ｐｂｏｚ、負極活物質６は、ｐｂであ
り，正極集電体４と負極集電体７は、鉛又は鉛合金シー
トからなっている。The positive electrode active material 3 is pboz, the negative electrode active material 6 is pb, and the positive electrode current collector 4 and negative electrode current collector 7 are made of lead or a lead alloy sheet.
正極１と負極２の平面形状は、第３図（．）、（ｂ）に
それぞれ示すもので、第４図のように組み合わされてい
る。第４図のＡ−Ａ線に沿う断面が、第１図の正極１と
負極２との関係に相当する．
なお、各極朶電体４、７と各極活物質３、６を合わせた
各極板の厚さはｌＵｌ．幅は４ｍ，正極１と負極２の間
の間隔は２ＩＩＩｏで、電解液保持層５の厚さは１．２
閣、大きさは５２ｍＸ５２ｎｎである．樹脂製フィルム
８の大きさは６０＋＋ｎ＋Ｘ６０ｍ＋＋＋で厚さは０．
１閣である．その結果、密閉形鉛蓄電池の厚さは全体で
２．４Ｒｌ１となり、極めて薄くかつ十分な容量を持つ
密閉形釦蓄電池を得ることが可能となる．
放電時には、電解液保持層５を通じて電池反応が持続し
、充電時には、ゲル状電解質９を通じて直接対極へのガ
ス吸収反応が進行するので、正極１と負極２が接触する
電池反応に必要な電解液量を常に確保できる．
正極１、負極２を同一平面に設置したとき、電解液保持
層５を各極１、２の活物質３、６面上部にわたって設置
すると，各極１、２間に電解液を保持したセパレータ１
０を設置するものに比べて、電解液の保持量が多く、活
物質３、６面全体での反応が可能となり、内部抵抗を小
さくするための各極１、２間隔の接近も可能となり、そ
れに伴い密閉形鉛蓄電池も小型化できる。The planar shapes of the positive electrode 1 and the negative electrode 2 are shown in FIGS. 3(.) and 3(b), respectively, and are combined as shown in FIG. 4. The cross section taken along the line A-A in FIG. 4 corresponds to the relationship between the positive electrode 1 and the negative electrode 2 in FIG. The thickness of each electrode plate, which is the sum of each electrode body 4, 7 and each electrode active material 3, 6, is lUl. The width is 4 m, the distance between the positive electrode 1 and the negative electrode 2 is 2IIIo, and the thickness of the electrolyte holding layer 5 is 1.2 m.
The size of the cabinet is 52m x 52nn. The size of the resin film 8 is 60++n+X60m+++ and the thickness is 0.
There is one cabinet. As a result, the total thickness of the sealed lead acid battery is 2.4Rl1, making it possible to obtain a sealed button storage battery that is extremely thin and has sufficient capacity. During discharging, the battery reaction continues through the electrolyte holding layer 5, and during charging, the gas absorption reaction progresses directly to the counter electrode through the gel electrolyte 9, so that the electrolyte necessary for the battery reaction where the positive electrode 1 and the negative electrode 2 are in contact with each other. You can always secure the quantity. When the positive electrode 1 and the negative electrode 2 are installed on the same plane, and the electrolyte holding layer 5 is installed over the active material 3 and 6 surfaces of each electrode 1 and 2, the separator 1 holding the electrolyte between each electrode 1 and 2
Compared to the case where 0 is installed, the amount of electrolyte retained is large, and the reaction can occur on the entire 3rd and 6th surfaces of the active material, and it is also possible to close the 1st and 2nd intervals of each pole to reduce internal resistance. Accordingly, sealed lead-acid batteries can also be made smaller.
更に，活物質３、６面の剥離防止にも役立ち、全体的に
容量安定となる。又、各極１、２間にゲル状電解質９を
設けると電池反応に寄与するだけでなく、充電中の発生
ガスが電解質保持層５中に捕らわれず、このゲル状電解
質９の亀裂を通じて直接対極へ吸収されるので、電解液
保持層５と各極１、２との密着がガス発生により損なわ
れることがなくなり、高容量化できる。Furthermore, it also helps to prevent the active materials 3 and 6 from peeling off, resulting in overall capacity stability. Furthermore, by providing a gel electrolyte 9 between each electrode 1 and 2, not only does it contribute to the battery reaction, but gas generated during charging is not trapped in the electrolyte holding layer 5, and is directly transferred to the counter electrode through cracks in the gel electrolyte 9. Therefore, the adhesion between the electrolyte holding layer 5 and each of the electrodes 1 and 2 is not impaired by gas generation, and the capacity can be increased.
また、本発明の密閉形銘’Ｔｊ ′Ｋ１池に関する第２
の実施例として、第１図に示したゲル状電解質９に代え
て高吸水性樹脂１１中に電解液を含浸したものを第２図
に示している。（本発明品２）高吸水性樹脂１１は、ゲ
ル状電解質より多址の電解液を保持することができるの
で、各極活物質３，６面に供給される放電反応に寄与す
る電解液が増加し、容量が増加する。Also, the second part regarding the sealed type 'Tj'K1 pond of the present invention
As an example, FIG. 2 shows a super absorbent resin 11 impregnated with an electrolyte instead of the gel electrolyte 9 shown in FIG. (Product of the present invention 2) The superabsorbent resin 11 can hold more electrolyte than the gel electrolyte, so that the electrolyte that contributes to the discharge reaction supplied to the surfaces of each electrode active material 3 and 6 is increases and capacity increases.
第６図に前記本発明品１、２と比較品のＩＣの定電流に
よる高率放電曲線を示す。図よりわかるように、比較品
は３０分間の放電持続時間であったが，本発明品１は４
５分間、本１発明品２は５５分間となり、比較品より容
量がそれぞれ５０％、８０％向上した．
発明の効果
本発明により、従来提案された密閉形鉛蓄電池に比べ、
活物質反応面積が増し、その結果容量安定となった．又
、電解液保持層で必要量の電解液量を確保できるので、
極間を接近させることができ、更に，電解液保持層とは
別に極間に電解液を含浸した高吸水性樹脂又はゲル状電
解質を介在させたことにより、電池反応に寄与するだけ
でなく充電時に発生したガスが電解液保持層を経由する
ことなく直接対極へ吸収されて電解液保持層へ残留しな
いため、活物質と電解液が十分に接触し高容社化をもた
らすので，工業的価値は絶大なるものである．FIG. 6 shows high rate discharge curves at constant current of ICs of the invention products 1 and 2 and a comparative product. As can be seen from the figure, the comparative product had a discharge duration of 30 minutes, but the inventive product 1 had a discharge duration of 40 minutes.
5 minutes, and 55 minutes for Inventive Product 1 and Invention Product 2, showing a capacity improvement of 50% and 80%, respectively, over the comparative product. Effects of the Invention The present invention provides a
The active material reaction area increased, resulting in stable capacity. In addition, since the required amount of electrolyte can be secured in the electrolyte holding layer,
It is possible to bring the electrodes closer together, and by interposing a super absorbent resin or gel electrolyte impregnated with electrolyte between the electrodes in addition to the electrolyte holding layer, it not only contributes to the battery reaction but also improves charging. The gas generated at the time is directly absorbed into the counter electrode without passing through the electrolyte holding layer, and does not remain in the electrolyte holding layer, so the active material and electrolyte come into sufficient contact, resulting in high capacity, which has industrial value. is enormous.
第１図は本発明の構造の一実施例を示す拡大断面図，第
２図は同じく他の実施例を示す拡大断面図，第３図は第
１図及び第２図に用いる（ａ）正極、（ｂ）負極、の形
状をそれぞれ示す平面図、第４図は同じく両極を組合せ
た状態を示す平面図，第５図は比較品の楕造を示す拡大
断面図、第６図は本発明品と比較品における高率放電特
性曲線図である。
１は正極、２は負極、３は正極活物質、４は正極集電体
、５は電解液保持層、６は負極活物質、７は負極集電体
、８は樹脂製フィルム，９はゲル状電解質，１０はセパ
レータ、１１は電解液を含浸した高吸水性樹脂Fig. 1 is an enlarged sectional view showing one embodiment of the structure of the present invention, Fig. 2 is an enlarged sectional view showing another embodiment, and Fig. 3 is the positive electrode (a) used in Figs. 1 and 2. , (b) A plan view showing the shapes of the negative electrode, FIG. 4 is a plan view showing the combined state of the two electrodes, FIG. 5 is an enlarged sectional view showing the oval shape of the comparative product, and FIG. 6 is the inventive product. It is a high rate discharge characteristic curve diagram of a product and a comparison product. 1 is a positive electrode, 2 is a negative electrode, 3 is a positive electrode active material, 4 is a positive electrode current collector, 5 is an electrolyte holding layer, 6 is a negative electrode active material, 7 is a negative electrode current collector, 8 is a resin film, 9 is a gel 10 is a separator, 11 is a super absorbent resin impregnated with electrolyte
Claims (1)
解液を含浸した高吸水性樹脂又はゲル状電解質を有し、
且つ前記正極及び負極の活物質面と前記高吸水性樹脂又
はゲル状電解質面の上部にわたって電解液保持層を設け
たことを特徴とする密閉形鉛蓄電池。It has a super absorbent resin or gel electrolyte impregnated with an electrolytic solution between the active materials of the positive electrode and negative electrode installed on the same plane,
A sealed lead-acid battery characterized in that an electrolyte holding layer is provided over the active material surfaces of the positive and negative electrodes and the superabsorbent resin or gel electrolyte surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1057075A JP2552352B2 (en) | 1989-03-09 | 1989-03-09 | Sealed lead acid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1057075A JP2552352B2 (en) | 1989-03-09 | 1989-03-09 | Sealed lead acid battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02236963A true JPH02236963A (en) | 1990-09-19 |
| JP2552352B2 JP2552352B2 (en) | 1996-11-13 |
Family
ID=13045343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1057075A Expired - Lifetime JP2552352B2 (en) | 1989-03-09 | 1989-03-09 | Sealed lead acid battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2552352B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05129009A (en) * | 1991-11-06 | 1993-05-25 | Shin Kobe Electric Mach Co Ltd | Sealed lead-acid battery |
| JPH05129036A (en) * | 1991-11-06 | 1993-05-25 | Shin Kobe Electric Mach Co Ltd | Closed type secondary battery |
| EP0689273A1 (en) * | 1993-05-03 | 1995-12-27 | Dial Engineering Ag | Method for charging of sealed lead-acid batteries |
| JP2006147210A (en) * | 2004-11-17 | 2006-06-08 | Hitachi Ltd | Secondary battery and production method therefor |
| JP2013170289A (en) * | 2012-02-20 | 2013-09-02 | Mitsubishi Heavy Ind Ltd | Electrolytic etching jig and electrolytic etching method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108653A (en) * | 1981-12-22 | 1983-06-28 | Matsushita Electric Ind Co Ltd | Sealed storage battery |
| JPS6113468U (en) * | 1984-06-29 | 1986-01-25 | 新神戸電機株式会社 | sealed lead acid battery |
| JPS63190260A (en) * | 1987-01-30 | 1988-08-05 | Shin Kobe Electric Mach Co Ltd | Lead storage battery |
-
1989
- 1989-03-09 JP JP1057075A patent/JP2552352B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108653A (en) * | 1981-12-22 | 1983-06-28 | Matsushita Electric Ind Co Ltd | Sealed storage battery |
| JPS6113468U (en) * | 1984-06-29 | 1986-01-25 | 新神戸電機株式会社 | sealed lead acid battery |
| JPS63190260A (en) * | 1987-01-30 | 1988-08-05 | Shin Kobe Electric Mach Co Ltd | Lead storage battery |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05129009A (en) * | 1991-11-06 | 1993-05-25 | Shin Kobe Electric Mach Co Ltd | Sealed lead-acid battery |
| JPH05129036A (en) * | 1991-11-06 | 1993-05-25 | Shin Kobe Electric Mach Co Ltd | Closed type secondary battery |
| EP0689273A1 (en) * | 1993-05-03 | 1995-12-27 | Dial Engineering Ag | Method for charging of sealed lead-acid batteries |
| JP2006147210A (en) * | 2004-11-17 | 2006-06-08 | Hitachi Ltd | Secondary battery and production method therefor |
| JP2013170289A (en) * | 2012-02-20 | 2013-09-02 | Mitsubishi Heavy Ind Ltd | Electrolytic etching jig and electrolytic etching method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2552352B2 (en) | 1996-11-13 |
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