JPS6231941A - Zinc can for dry battery - Google Patents
Zinc can for dry batteryInfo
- Publication number
- JPS6231941A JPS6231941A JP17075185A JP17075185A JPS6231941A JP S6231941 A JPS6231941 A JP S6231941A JP 17075185 A JP17075185 A JP 17075185A JP 17075185 A JP17075185 A JP 17075185A JP S6231941 A JPS6231941 A JP S6231941A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- lithium
- lead
- cans
- dry batteries
- 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
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 63
- 239000011701 zinc Substances 0.000 title claims abstract description 63
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 25
- 239000008188 pellet Substances 0.000 claims abstract description 13
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 23
- 229910052793 cadmium Inorganic materials 0.000 abstract description 11
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract description 11
- 239000012535 impurity Substances 0.000 abstract description 8
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052753 mercury Inorganic materials 0.000 abstract description 7
- 238000004090 dissolution Methods 0.000 abstract description 5
- 238000011109 contamination Methods 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 4
- 238000005536 corrosion prevention Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 238000005260 corrosion Methods 0.000 description 18
- 230000007797 corrosion Effects 0.000 description 17
- 239000000047 product Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002730 mercury Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 150000003751 zinc Chemical class 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/06—Electrodes for primary cells
- H01M4/08—Processes of manufacture
- H01M4/12—Processes of manufacture of consumable metal or alloy electrodes
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/42—Alloys based on zinc
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は亜鉛ペレットを衝撃押出法により製造する乾電
池用亜鉛缶に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a zinc can for a dry cell manufactured by producing zinc pellets by an impact extrusion method.
従来の乾電池用亜鉛缶においては、亜鉛が比較的脆性を
持ち加工性に劣るととと、乾電池の電解液に対して自己
溶解が大きいことを理由として、純亜鉛に適量の鉛およ
びカドミウムを添加した亜鉛合金材を用いて衝撃押出法
で製缶することが行なわれていた。ことで、添加される
鉛は延展性の向上と加圧力を低減させる効果があり、ま
たカドミウムは衝撃押出法による加工等の脆性を改善す
る効果があることが知られておシ、金属的強度を向上さ
せることができる。特に鉛については、上述の効果の他
に電解液に対して自己溶解を抑制する効果があるととも
に、亜鉛または電池構成材料等から溶出して亜鉛を無為
に浸食せしめるアンチモン、砒素、鉄等の不純物による
悪影響を抑える効果がある。In conventional zinc cans for dry cell batteries, appropriate amounts of lead and cadmium are added to pure zinc because zinc is relatively brittle and has poor workability, and because it is highly self-dissolving in the dry cell electrolyte. The impact extrusion method was used to manufacture cans using zinc alloy materials. As a result, the added lead has the effect of improving ductility and reducing the pressing force, and cadmium is known to have the effect of improving brittleness during processing by impact extrusion, etc., and improves metallic strength. can be improved. In particular, regarding lead, in addition to the above-mentioned effects, it has the effect of suppressing self-dissolution in the electrolytic solution, and impurities such as antimony, arsenic, and iron that are leached from zinc or battery constituent materials and wastefully erode zinc. It has the effect of suppressing the negative effects of
以上のことから、亜鉛の加工性および防食性を向上させ
るうえで鉛を０．１０〜０．５０重量％添加させておシ
、また加工時の脆性および金属的強度を向上させるとと
もに、更に防食性を高めることを目的としてカドミウム
を０．０３〜０．０５重量％添加している。このよう表
組成範囲で鉛およびカドミウムを添加して作った亜鉛ペ
レットを衝撃押出法によシ製缶した亜鉛缶は加工性、金
属的強度、防食性に優れたものとなる。From the above, we found that adding 0.10 to 0.50% by weight of lead improves the workability and corrosion resistance of zinc, and also improves the brittleness and metallic strength during processing, as well as providing further corrosion protection. Cadmium is added in an amount of 0.03 to 0.05% by weight for the purpose of increasing the properties. Zinc cans made by impact extrusion of zinc pellets made by adding lead and cadmium within the composition range shown above have excellent workability, metallic strength, and corrosion resistance.
との亜鉛缶を乾電池として実用化させるには、亜鉛の水
素過電圧を高めるとともに亜鉛の自己溶解を抑え、かつ
他の重金属の混入による局部電池の発生を抑制する必要
がある。そこで、従来では水銀塩により亜鉛缶内表面を
アマルガムして防食性を高めることが行なわれている。In order to put zinc cans into practical use as dry batteries, it is necessary to increase the hydrogen overvoltage of zinc, suppress the self-dissolution of zinc, and suppress the occurrence of local batteries due to the contamination of other heavy metals. Therefore, in the past, the inner surface of zinc cans was amalgamated with mercury salts to improve corrosion resistance.
従来のものによると、防食に必要とされる水銀の量は鉛
、カドミウムの含有量によシ大きく影響を受けることに
なり、充分な防食性を得るには水銀の量を増大させる必
要がある。近年、乾電池中の水銀が公害的重金属として
とりあげられ、水銀を添加しない乾電池の開発が要望さ
れている。また、カドミウムも公害として問題のある金
属であることから、カドミウムの量を減らし、強いては
含有しない乾電池の開発が望まれている。According to conventional methods, the amount of mercury required for corrosion protection is greatly affected by the content of lead and cadmium, and it is necessary to increase the amount of mercury to obtain sufficient corrosion protection. . In recent years, mercury in dry batteries has been highlighted as a polluting heavy metal, and there has been a demand for the development of dry batteries that do not contain mercury. Furthermore, since cadmium is also a metal that poses a pollution problem, there is a desire to reduce the amount of cadmium, or even to develop dry batteries that do not contain it.
この発明は衝撃押出法によって製造される乾電池用亜鉛
缶を亜鉛に鉛とリチウムを添加した亜鉛合金で作ること
で、前記の問題点を解決し、加工性、金属的強度、防食
性に優れた乾電池亜鉛缶を提供することを目的とする。This invention solves the above problems by making zinc cans for dry batteries manufactured by impact extrusion from a zinc alloy containing zinc with lead and lithium, and has excellent workability, metallic strength, and corrosion resistance. The purpose is to provide zinc cans for dry batteries.
この発明は亜鉛ベレットを亜鉛、鉛、リチウムを必須成
分とする亜鉛合金で構成し、とれを衝撃押出法で製缶し
て亜鉛缶を製造することを特徴とするものである。This invention is characterized in that zinc pellets are made of a zinc alloy containing zinc, lead, and lithium as essential components, and the pellets are made into cans by impact extrusion to produce zinc cans.
添加される鉛は地金の延展性の向上、加圧力の低減およ
び不純物による悪影響を抑える効果を有し、この効果を
発揮せしめるには鉛の添加量を０６１０〜０．５０．！
［％にする必要がある。なお、リチウムの防食効果を考
慮に入れた場合には鉛の添加量は０．１０〜０．２０重
重量幅する必要がある。The added lead has the effect of improving the ductility of the base metal, reducing the pressing force, and suppressing the adverse effects of impurities. To achieve this effect, the amount of lead added should be 0.610 to 0.50. !
[Need to be in %. In addition, when the anticorrosive effect of lithium is taken into consideration, the amount of lead added needs to range from 0.10 to 0.20 weight range.
一方、添加されるリチウムは電解液中における亜鉛缶の
腐食量および金属的強度を勘案して添加量を０．００ｆ
〜１．０重量幅にする必要があり、更に１亜鉛合金材。On the other hand, the amount of lithium added was adjusted to 0.00f in consideration of the amount of corrosion of the zinc can in the electrolyte and the metal strength.
It is necessary to make the weight range ~1.0, and further 1 zinc alloy material.
製造イ件ヵ、ら。、。。５〜０．５□量ｍｏｂことが望
まれる。なお、リチウムの添加量が０００１〜１０重量
％の範囲で高い防食性を示すのは、０．００１ １重量
幅以下では亜鉛を良好に防食するのに不十分な量であ！
＋、１．０重量％以上では亜鉛に含有されるリチウム自
体が溶出してしまうためである。Manufacturing matters, etc. ,. . A mob size of 5 to 0.5 square meters is desired. Note that high corrosion resistance is exhibited when the amount of lithium added is in the range of 0.001 to 10% by weight, because if the amount is less than 0.0011% by weight, the amount is insufficient to properly protect zinc from corrosion!
This is because lithium itself contained in zinc will be eluted if the amount is 1.0% by weight or more.
本発明の乾電池用亜鉛缶が加工性、金属的強度および防
食性に優れている理由を以下に述べる。The reason why the zinc can for dry batteries of the present invention is excellent in workability, metallic strength, and corrosion resistance will be described below.
必須成分である鉛は亜鉛の延展性の向上と加圧力の低減
および不純物の混入による悪影響を抑える効果がある。Lead, which is an essential component, has the effect of improving the spreadability of zinc, reducing the pressing force, and suppressing the negative effects of impurity contamination.
とのとから、衝撃押出法によシ製缶する際に加工性を向
上させることができる。また防食性については鉛が亜鉛
の結晶粒界に析出してその部分の水素過電圧が高まるこ
とから、不純物の内部への析出によって起こる腐食を抑
制することができる。Therefore, the processability can be improved when making cans by the impact extrusion method. Regarding anti-corrosion properties, lead precipitates at grain boundaries of zinc and increases the hydrogen overvoltage in that area, making it possible to suppress corrosion caused by impurity precipitation inside.
必須成分であるリチウムは主に亜鉛缶の金属的強度を高
める効果と、不純物の混入による亜鉛の自己溶解を防止
する効果を有する。金属的強度を向上させる理由として
は、亜鉛に微量のリチウムを添加することによシ、亜鉛
が著しく硬化することに起因するもので、リチウムを０
．００５重量％添加しただけでも亜鉛の硬度を著しく高
めることができる。更に、リチウムを鉛とともに添加す
るととによ）、鉛のもつ効果を阻害せずに加工性、金属
的強度に優れた亜鉛缶を衝撃押出法によシ製造するとと
ができる。また、防食性については、リチウムが亜鉛中
に含まれている極微量の不純物と金属間化合物をつくシ
腐食を抑制せしめるとともに、添加したリチウムが表面
腐食生成物として除々に溶出し、亜鉛の自己溶解を著し
く抑制することができるためである。Lithium, which is an essential component, mainly has the effect of increasing the metallic strength of the zinc can and the effect of preventing self-dissolution of zinc due to contamination with impurities. The reason for improving the metallic strength is that adding a small amount of lithium to zinc causes the zinc to harden significantly.
．． Addition of just 0.05% by weight can significantly increase the hardness of zinc. Furthermore, if lithium is added together with lead, it is possible to produce zinc cans with excellent workability and metallic strength by impact extrusion without inhibiting the effects of lead. In addition, regarding corrosion resistance, lithium inhibits corrosion due to the formation of extremely small amounts of impurities and intermetallic compounds contained in zinc, and the added lithium gradually dissolves as a surface corrosion product, causing zinc to self-regulate. This is because dissolution can be significantly suppressed.
以下、この発明の第一実施例を説明する。 A first embodiment of this invention will be described below.
純度９９．９９１の亜鉛を黒鉛ルツボの中に入れ、ここ
に所定量の鉛を添加した後、アルゴンガス雰囲気中で６
００℃に加熱して溶解させて合金化する。Zinc with a purity of 99.991 was placed in a graphite crucible, a predetermined amount of lead was added thereto, and then heated in an argon gas atmosphere for 6 hours.
It is heated to 00°C to melt and alloy.
このようにして得られた融液にリチウムを表示の割合で
添加し、全体を撹拌して再び６００℃で加熱溶解させて
均一な組成の亜鉛合金を作る。次に、この融液を高純度
黒鉛製鋳型の中に流し込み、放冷して円柱状亜鉛合金を
形成する。とれを所定の長さに切シ出して亜鉛ベレット
とする。この亜鉛ベレットに潤滑剤として黒鉛を付着さ
せ、１３０〜２５０℃に予熱を加えた状態で衝撃押出法
（インパクトエクスツルージ冒ン）により製缶し、縁切
シをして亜鉛缶が完成する。Lithium is added to the melt thus obtained in the indicated ratio, the whole is stirred, and the mixture is heated and melted again at 600° C. to produce a zinc alloy with a uniform composition. Next, this melt is poured into a mold made of high-purity graphite and allowed to cool to form a cylindrical zinc alloy. Cut the pieces to a specified length to make zinc pellets. Graphite is attached to this zinc pellet as a lubricant, preheated to 130 to 250 degrees Celsius, and cans are made using the impact extrusion method. The edges are cut to complete the zinc can. .
ここで、亜鉛、鉛、リチウムを必須成分として含有する
亜鉛缶について、リチウムの添加量を変化させて作った
単一型乾電池用亜鉛缶を５個ずつ６０℃で、３週間電解
液中に浸漬させて亜鉛缶の腐食減量の平均値を調べたと
ころ添付図に示すような結果が得られた。なお、本実験
においては鉛の添加量を０．１５５重量％設定し、また
電解液はＮＨ。Here, for zinc cans containing zinc, lead, and lithium as essential components, five zinc cans for single-type dry batteries made by varying the amount of lithium added were immersed in an electrolytic solution at 60°C for three weeks. When the average value of corrosion loss of zinc cans was investigated, the results shown in the attached figure were obtained. In this experiment, the amount of lead added was set at 0.155% by weight, and the electrolyte was NH.
Ｃ！７２０重量％ 、 ＺｎＯ／１２０重量％ 、 Ｈ
２Ｏ６０重量％−ｔ”構成したものを使用した。C! 720% by weight, ZnO/120% by weight, H
2O 60% by weight-t'' was used.
添付図によると、リチウムの含有量が０ｆ１０１〜ＩＤ
重量％の範囲で高い防食効果が認められることが判る。According to the attached diagram, the lithium content is 0f101~ID
It can be seen that a high anticorrosive effect is observed within a range of % by weight.
次に、鉛とリチウムの添加効果を調べるうえでリチウム
を０．００１〜１．０重量％の範囲で含有させた亜鉛ペ
レットを衝撃押出法によシ本発明の亜鉛缶を２００個製
造して、ひび割れや亀裂等の調べたととる、ひび割れや
亀裂等の発生が１個も見ら、れなかった。Next, in order to investigate the effect of adding lead and lithium, 200 zinc cans of the present invention were manufactured by impact extrusion using zinc pellets containing 0.001 to 1.0% by weight of lithium. When I checked for cracks, cracks, etc., I didn't find any cracks, cracks, etc.
このことから、本発明品は金属的強度を向上し、脆性に
優れたもので、従来品と同等以上の加工性を有すること
が判った。From this, it was found that the product of the present invention has improved metallic strength, excellent brittleness, and has workability equivalent to or better than conventional products.
しかして、本発明の亜鉛缶を用いてＲ２０形乾電池を構
成したところ、水銀無添加でも十分な耐漏液性放電性能
を得ることができ、従来品に比べて優れた亜鉛缶である
ことが判明した。However, when an R20 type dry battery was constructed using the zinc can of the present invention, sufficient leakage-resistant discharge performance could be obtained even without the addition of mercury, and it was found that the zinc can was superior to conventional products. did.
なお、この発明は上記実施例にのみ限定されるものでは
なく、要旨を変更しない範囲において種々変形して実施
することができる。Note that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without changing the gist.
例えば、必須成分として添加する鉛、リチウム以外にイ
ンジウム、ガリウム、錫、ビスマス、アルカリ金属、ア
ルカリ土類金属等を添加して、防食性への複合効果をも
たせることもできる。For example, in addition to lead and lithium, which are added as essential components, indium, gallium, tin, bismuth, alkali metals, alkaline earth metals, etc. can be added to provide a combined effect on anticorrosion properties.
この発明によれば亜鉛に鉛とリチウムを添加することで
、従来のカドミウムを必須成分とした亜 １鉛缶に比べ
て同等以上の金属的強度、防食効果を得ることができる
。しか龜、従来品において必須成分として添加されてい
たカドミウムを低減もしくは無くすことができるととも
に、乾電池を構成する際に水銀無添加でも十分な性能を
維持することができるため、公害問題に対処し得る工業
的に価値のある乾電池を提供することができる。According to this invention, by adding lead and lithium to zinc, it is possible to obtain metal strength and anticorrosion effects that are equal to or greater than those of conventional zinc cans that contain cadmium as an essential component. However, it is possible to reduce or eliminate cadmium, which was added as an essential component in conventional products, and to maintain sufficient performance without adding mercury when constructing dry batteries, making it possible to address pollution issues. It is possible to provide industrially valuable dry batteries.
添付図面はこの発明の一実施例を説明するだめのリチウ
ム含有量と腐食減量の関係を示すグラフ図である。
印早士The accompanying drawing is a graph diagram showing the relationship between lithium content and corrosion loss for explaining one embodiment of the present invention. Insayashi
Claims (2)
鉛缶において、上記亜鉛ペレットを亜鉛、鉛およびリチ
ウム等を必須成分として含有する亜鉛合金で作ることを
特徴とする乾電池用亜鉛缶。(1) A zinc can for dry batteries in which zinc pellets are manufactured by an impact extrusion method, wherein the zinc pellets are made of a zinc alloy containing zinc, lead, lithium, etc. as essential components.
．０重量％にしたことを特徴とする特許請求の範囲第１
項記載の乾電池用亜鉛缶。(2) Zinc pellets have a lithium content of 0.001 to 1
．． Claim 1 characterized in that the content is 0% by weight.
Zinc cans for dry batteries as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17075185A JPS6231941A (en) | 1985-08-02 | 1985-08-02 | Zinc can for dry battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17075185A JPS6231941A (en) | 1985-08-02 | 1985-08-02 | Zinc can for dry battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6231941A true JPS6231941A (en) | 1987-02-10 |
Family
ID=15910711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17075185A Pending JPS6231941A (en) | 1985-08-02 | 1985-08-02 | Zinc can for dry battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6231941A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013534853A (en) * | 2010-07-01 | 2013-09-09 | オプトス、ピーエルシー | Improvement in ophthalmology or ophthalmology |
| US9978140B2 (en) | 2016-04-26 | 2018-05-22 | Optos Plc | Retinal image processing |
| US10010247B2 (en) | 2016-04-26 | 2018-07-03 | Optos Plc | Retinal image processing |
| US10178951B2 (en) | 2009-08-10 | 2019-01-15 | Optos Plc | Laser scanning system and method |
-
1985
- 1985-08-02 JP JP17075185A patent/JPS6231941A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10178951B2 (en) | 2009-08-10 | 2019-01-15 | Optos Plc | Laser scanning system and method |
| JP2013534853A (en) * | 2010-07-01 | 2013-09-09 | オプトス、ピーエルシー | Improvement in ophthalmology or ophthalmology |
| US9978140B2 (en) | 2016-04-26 | 2018-05-22 | Optos Plc | Retinal image processing |
| US10010247B2 (en) | 2016-04-26 | 2018-07-03 | Optos Plc | Retinal image processing |
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