JPH0249353A - Lead-acid battery - Google Patents
Lead-acid batteryInfo
- Publication number
- JPH0249353A JPH0249353A JP63200593A JP20059388A JPH0249353A JP H0249353 A JPH0249353 A JP H0249353A JP 63200593 A JP63200593 A JP 63200593A JP 20059388 A JP20059388 A JP 20059388A JP H0249353 A JPH0249353 A JP H0249353A
- Authority
- JP
- Japan
- Prior art keywords
- active material
- sulfuric acid
- lead
- electrode plate
- battery
- 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 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000011149 active material Substances 0.000 claims abstract description 53
- 239000000126 substance Substances 0.000 claims abstract description 20
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 10
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 abstract description 17
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000009792 diffusion process Methods 0.000 abstract description 10
- 239000004677 Nylon Substances 0.000 description 9
- 239000011324 bead Substances 0.000 description 9
- 229920001778 nylon Polymers 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000013078 crystal Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- YADSGOSSYOOKMP-UHFFFAOYSA-N dioxolead Chemical compound O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 241001503991 Consolida Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 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
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005211 surface analysis Methods 0.000 description 1
- 239000002344 surface layer 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
- 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
【発明の詳細な説明】
産業上の利用分野
本発明は鉛蓄電池に関するもので更に詳しくは活物質の
利用率向上に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to lead-acid batteries, and more particularly to improving the utilization rate of active materials.
従来の技術
鉛蓄電池は安定な性能を有し、エネルギー貯蔵手段とし
て非常に優れている。しかし、池の蓄電池系と比較して
、エネルギー密ＩＪ［（Ｗｈ／ｋｇ ）が劣るという欠
点を有している。これは活物質の利用率が悪いというこ
とによるものである。この活物質の利用率を向上させる
ことが、鉛蓄電池のエネルギー密度を向上させるために
、最も効果的であると考えられる。Conventional technology Lead-acid batteries have stable performance and are very good as energy storage means. However, it has the disadvantage that the energy density IJ [(Wh/kg) is inferior to that of pond storage battery systems. This is due to the poor utilization rate of the active material. Improving the utilization rate of this active material is considered to be the most effective way to improve the energy density of lead-acid batteries.
鉛蓄電池の正極及び負極の活物質は、原料となる鉛粉を
、それぞれの添加物とともに、希硫酸またはその他の練
液と混合し、攪拌しながらペーストを作りこのペースト
を格子中に充填し、所定の乾燥、化成の工程を経て、作
製されている。The active materials for the positive and negative electrodes of lead-acid batteries are made by mixing lead powder as a raw material with dilute sulfuric acid or other mixing liquid, along with the respective additives, making a paste while stirring, and filling this paste into a lattice. It is manufactured through prescribed drying and chemical formation processes.
化成により正極活物質は二酸化鉛ｐｂｏ２に変化し負極
活物質は鉛ｐｂに変化する。そして、放電、充電の繰り
返しは、下記の反応式で示すように起こる。Through chemical formation, the positive electrode active material changes to lead dioxide pbo2, and the negative electrode active material changes to lead pb. The repetition of discharging and charging occurs as shown in the reaction formula below.
放電反応が進行すると、放電生成物である硫酸鉛ＰｂＳ
Ｏ４が、電解液である硫酸Ｈ２ＳＯ４の拡散の良い極板
表面から生成され、結晶として成長していき、極板表面
を覆うようになる。この放電反応の進行状況に、大きく
影響を与えるのは電解液である硫酸Ｈ２ＳＯ４の極板内
での拡散であり、極板内部に十分存在していることが望
ましい。As the discharge reaction progresses, the discharge product lead sulfate PbS
O4 is generated from the surface of the electrode plate where the electrolytic solution sulfuric acid H2SO4 can diffuse well, and grows as a crystal to cover the surface of the electrode plate. What greatly influences the progress of this discharge reaction is the diffusion of sulfuric acid H2SO4, which is an electrolytic solution, within the electrode plate, and it is desirable that the electrolyte be sufficiently present inside the electrode plate.
ところで、鉛蓄電池の極板活物質は多くのボアを持つ、
多孔性のものであシ、次の２種類に大別することができ
る。ひとつは直径Ｏｊμｍ 未満の個々の結晶の集合に
よりできる小さなボアで、活物質の表面積を増加させ反
応の場を提供している。By the way, the plate active material of lead-acid batteries has many bores.
It is porous and can be roughly divided into the following two types. One is a small pore formed by a collection of individual crystals with a diameter of less than Ojμm, which increases the surface area of the active material and provides a reaction field.
もうひとつは、直径０．１μｍ以上の個々の結晶が集合
したものが結合することによりできる大きなボアで、こ
のボアが電解液の移動の通路となっている。つまりボア
の中でも硫酸の拡散に寄与するのは、直径Ｑ、１μｍ以
上の大きなボアである。よって大きなボアを持つ極板で
は硫酸の拡散が良く、極板内部まで反応するため、極板
中の活物質の利用率が高くなる。The other is a large bore formed by combining individual crystals with a diameter of 0.1 μm or more, and this bore serves as a passage for the electrolyte to move. In other words, among the bores, it is the large bores with a diameter Q of 1 μm or more that contribute to the diffusion of sulfuric acid. Therefore, in an electrode plate with a large bore, sulfuric acid diffuses well and reacts to the inside of the electrode plate, increasing the utilization rate of the active material in the electrode plate.
従来のペースト処方では、第２図に示すように、活物質
中のボアは全体的に少なく、硫酸の拡散が悪く、利用率
も悪いものであった。In the conventional paste formulation, as shown in FIG. 2, the number of bores in the active material was generally small, the diffusion of sulfuric acid was poor, and the utilization rate was also poor.
次にボアを増やすため、鉛粉練今時に多量の水を入れ、
活物質中のボアを増やし、硫酸の拡散を良くして利用率
の向上を計った。この方法では、活物質中のボアは、大
きいボアも小さいボアも全般的に増えた。Next, to increase the bore, add a large amount of water while mixing lead powder.
The aim was to increase the utilization rate by increasing the number of bores in the active material and improving the diffusion of sulfuric acid. With this method, the number of bores in the active material, both large and small, was increased overall.
発明が解決しようとする課題
このような方法では、活物質中の硫酸の拡散に関与する
大きなボアのみが増加するのではなく、小さなボアまで
も増加する。小さなボアは結晶の集合によりできるボア
であるため、これが増加すると活物質の結晶間の結着性
が悪くなり、原板強度が弱まるのでサイクル特性が悪く
なるという課題を有していた。Problems to be Solved by the Invention In such a method, not only the large pores involved in the diffusion of sulfuric acid in the active material are increased, but also the small pores are increased. Since small bores are formed by aggregation of crystals, when the number of small bores increases, the binding between the crystals of the active material deteriorates, which weakens the strength of the original plate, resulting in poor cycle characteristics.
本発明は、上記従来の課題を解決するもので、活物質中
に小さいボアを増やさず硫酸の移動の通路となる大きな
ボアのみを増加させることにより、サイクル特性を下げ
ることなく、硫酸の拡散を良くして利用率を高め、エネ
ルギー密度（Ｗ ｈ 、、／ｋｇ ）を向上させること
を目的とするものである。The present invention solves the above-mentioned conventional problems. By increasing only the large bores that serve as passages for sulfuric acid movement without increasing the number of small bores in the active material, the diffusion of sulfuric acid can be improved without deteriorating the cycle characteristics. The purpose of this is to increase the utilization rate and improve the energy density (W h , /kg).
課題を解決するための手段
このような課題を解決するために、本発明は鉛粉に直径
０．０８μｍ〜１．０７１ｍで化成時の硫酸水溶液に可
溶性の物質を添加したペースト状活物質を塗着した極板
を用いることを特徴とする鉛蓄電池である。Means for Solving the Problems In order to solve these problems, the present invention coats lead powder with a paste-like active material having a diameter of 0.08 μm to 1.071 m and containing a substance soluble in an aqueous sulfuric acid solution during formation. This is a lead-acid battery characterized by the use of attached electrode plates.
作用
上記のように、鉛粉に直径０．０８μｍ〜１．０μｍで
化成時の硫酸水溶液に可溶性の物質を添加し、化成時に
可溶性物質を溶かし出すことによりペースト活物質中に
、硫酸が通過するのに適切な大きなボアのみをあけるこ
とが可能となる。このため、極板内での硫酸の拡散が良
くなり、極板内部まで反応が起こり、活物質の利用率が
高められる。すなわち、電池のエネルギー密度（Ｗｈ／
ｋｇ）が向上することになる。Effect As mentioned above, by adding a substance with a diameter of 0.08 μm to 1.0 μm to lead powder that is soluble in an aqueous sulfuric acid solution during formation, and dissolving the soluble substance during formation, sulfuric acid passes into the paste active material. This makes it possible to drill only large bores suitable for Therefore, the diffusion of sulfuric acid within the electrode plate is improved, the reaction occurs even inside the electrode plate, and the utilization rate of the active material is increased. In other words, the energy density of the battery (Wh/
kg) will be improved.
また、大きなボアのみをあけることができるので、活物
質の結晶間の結着性を悪くすることもなく、サイクル特
性を下げることなく、エネルギー密度が向上することと
なる。Furthermore, since only large bores can be formed, the energy density is improved without impairing the binding between the crystals of the active material and without degrading the cycle characteristics.
実施例
以下本発明の一実施例について、図面を参照しながら説
明する。EXAMPLE An example of the present invention will be described below with reference to the drawings.
第１図は本発明の実施例で、鉛粉に直径０．０８μｍ〜
１−Ｑμｍを有し、化成時の硫酸水溶液に可溶性の物質
を添加し５作製した活物質の概念図である。第１図にお
いてムはペーストを格子中に充填し、乾燥した状態のも
のである。この未化成の乾燥状態の時貞では、硫酸水溶
液に可溶性の物質として添加したナイロンビーズが存在
している。この極板を硫酸水溶液中で化成することによ
り、Ｂに示した様にナイロンビーズが溶けだし大きなボ
アがあいた活物質となる。Figure 1 shows an example of the present invention, in which lead powder has a diameter of 0.08 μm or more.
FIG. 5 is a conceptual diagram of an active material having a diameter of 1-Q μm and prepared by adding a soluble substance to an aqueous sulfuric acid solution during chemical formation. In FIG. 1, the paste is filled into a lattice and dried. In this dry, unformed Tokisada, nylon beads added as a soluble substance to the sulfuric acid aqueous solution are present. By chemically converting this electrode plate in an aqueous sulfuric acid solution, the nylon beads begin to melt as shown in B, forming an active material with large bores.
第２図は本発明の鉛粉にナイロンビーズを添加し大きな
ボアをあけた活物質と、従来の活物質、及び多量の水を
加えた活物質の三種類の活物質の孔径分布を示したもの
である。従来の活物質ではボアは全体的に少なく、又多
量の水を加えた活物質では孔径Ｏｊμｍ以上の大きなボ
アが多くなっているのに加え、孔径０．１μｍ以下の小
さなボアも多くなっている。これに対して、本発明の活
物質においては、口径０．１μｍ以上の大きなボアのみ
多くなっているのが確認できた。Figure 2 shows the pore size distribution of three types of active materials: the active material of the present invention in which nylon beads are added to lead powder and large pores are made, the conventional active material, and the active material in which a large amount of water is added. It is something. Conventional active materials have fewer pores overall, and active materials with a large amount of water added have many large pores with a pore diameter of Ojμm or more, as well as many small pores with a pore diameter of 0.1μm or less. . In contrast, in the active material of the present invention, it was confirmed that only large bores with a diameter of 0.1 μm or more were present.
上記第１図の活物質を用いて鉛蓄電池を作製する。たと
えば、鉛粉１ｋｇに対して、直径０．１／７！１１のナ
イロンビーズを０．２重量％加える。まず、鉛粉に純水
９ｏ肩ｅ及び比重１．４希硫酸１ｏＯｒｕｔを添加しよ
く混練し、いわゆるペースト状物質を得る。A lead-acid battery is manufactured using the active material shown in FIG. 1 above. For example, 0.2% by weight of nylon beads with a diameter of 0.1/7!11 is added to 1kg of lead powder. First, 90 degrees of pure water and 10 degrees of dilute sulfuric acid with a specific gravity of 1.4 are added to lead powder and thoroughly kneaded to obtain a so-called paste-like substance.
このペースト状物質は、添加した硫酸は全て鉛粉と反応
しておりＰＨ７で中性を示している。ここでナイロンビ
ーズを添加し再び混練する。このペーストを格子中に充
填し、乾燥、化成の工程を経て、正極板及び負極板とし
て鉛蓄電池を組み立てた。ナイロンビーズは化成時に溶
は出し、活物質は大きなボアをもった多孔質なものとな
る。これを活物質Ａとする。同様にして、従来の活物質
を鉛粉１ｋｇに対して、純水９ｏ ｚｇ及び比重１．４
の希硫酸１ｏＯ−を添加しよく混練し、作製する。これ
を活物質Ｂとする。更に、同様にして、多量の水で練合
した活物質を鉛粉１ｋｇに対して純水１８０ｗＬｔ及び
比重１．４の希硫酸１ｏｏｙｘｌを添加しよく混練し、
作製する。これを活物質Ｃとする。All of the added sulfuric acid reacted with the lead powder, and the paste-like material had a neutral pH of 7. At this point, nylon beads are added and kneaded again. This paste was filled into a grid, and after drying and chemical conversion steps, a lead-acid battery was assembled as a positive electrode plate and a negative electrode plate. The nylon beads dissolve during chemical formation, and the active material becomes porous with large pores. This is called active material A. Similarly, the conventional active material was mixed with 9 ozg of pure water and a specific gravity of 1.4 for 1 kg of lead powder.
100- of dilute sulfuric acid is added and kneaded well to prepare. This is called active material B. Furthermore, in the same manner, 180 wLt of pure water and 10yxl of dilute sulfuric acid with a specific gravity of 1.4 were added to 1 kg of lead powder to the active material kneaded with a large amount of water, and the mixture was thoroughly kneaded.
Create. This is called active material C.
第３図は本発明の一実施例における密閉形鉛蓄電池のセ
ルの断面の概略図を示すものである。第３図において、
４は正極板であり、上記のようにして大きなボアをあけ
た多孔質な活物質を用いて作製したものである。鉛粉は
化成により正極活物質である二酸化鉛ＰｂＯ２に変化し
ている。５は負極板であり、４の正極板と同様に上記の
ようにして大きなボアをあけた多孔質な活物質を用いて
作製したものである。鉛粉は化成により負極活物質であ
る鉛ｐｂに変化している。６はセパレータであり。FIG. 3 shows a schematic cross-sectional view of a cell of a sealed lead-acid battery according to an embodiment of the present invention. In Figure 3,
4 is a positive electrode plate, which was manufactured using a porous active material with a large bore as described above. The lead powder is transformed into lead dioxide PbO2, which is a positive electrode active material, through chemical conversion. Reference numeral 5 denotes a negative electrode plate, which, like the positive electrode plate 4, is manufactured using a porous active material with a large bore as described above. The lead powder is transformed into lead PB, which is a negative electrode active material, through chemical conversion. 6 is a separator.
ガラス繊維を主成分としており、７は耐硫酸性を有スる
ポリプロピレン製の電槽である。８は正極端子、９は負
極端子、１０は電槽上部に設けたガス抜き弁で、通常電
槽内部を密閉構造に保っている。電解液としては、比重
１．３０の希硫酸を使用した。The main component is glass fiber, and 7 is a polypropylene battery case that is resistant to sulfuric acid. 8 is a positive terminal, 9 is a negative terminal, and 10 is a gas vent valve provided at the top of the battery case, which normally maintains the inside of the battery case in a sealed structure. Dilute sulfuric acid with a specific gravity of 1.30 was used as the electrolyte.
本発明の活物質ムを用いて酸４Ｑｍｍ、横３Ｑｍｍ。Using the active material of the present invention, the acid size is 4Qmm and the width is 3Qmm.
厚さ３−６ ｍｍの正極板及び負極板とし、第３図に示
すように組み立てた。この密閉形鉛蓄電池を電池人とす
る。次に従来の活物質Ｂを用いて、上記と同様にして電
池を作製する。この密閉形鉛蓄電池を電池Ｂとする。ま
た、多量の水で練合した活物質Ｃを用いて、上記と同様
にして電池を作製する。A positive electrode plate and a negative electrode plate having a thickness of 3 to 6 mm were assembled as shown in FIG. This sealed lead-acid battery is called a battery person. Next, a battery is produced using conventional active material B in the same manner as above. This sealed lead-acid battery will be referred to as battery B. Further, a battery is produced in the same manner as above using the active material C mixed with a large amount of water.
この密閉形鉛蓄電池を電池Ｃとする。This sealed lead-acid battery will be referred to as battery C.
これらの電池ム、Ｂ及びＣにつき、放電（０，１Ｃムの
定電流）及び充電（０−１０ムの定電流）のサイクルを
繰り返す電池試験を行った。なお放電の終止電圧は１−
７５”／に設定した。For these batteries B and C, a battery test was conducted in which cycles of discharging (constant current of 0.1 cm) and charging (constant current of 0-10 cm) were repeated. The final voltage of discharge is 1-
It was set to 75”/.
第４図に、放電容量の比較図を示す。本発明電池Ａは、
従来電池Ｂに比べて約１８％多くなっている。そこでこ
れらの電池ム及びＢを放電終了後、極板を取り出しイオ
ウＳの分布状態をＸ線マイクロアナライザを用いて面分
析を行ない確認すると、電池Ｂでは極板の表面層のみに
集中的に分布し、極板内部には偏在している。これに対
し、電池ムでは極板の内部まで広く分布している。この
ことから本発明の活物質を用いたことによシ、極板中の
硫酸の拡散が良くなり利用率が向上したことが確認でき
る。FIG. 4 shows a comparison diagram of discharge capacity. The battery A of the present invention is
This is about 18% more than the conventional battery B. Therefore, after discharging these batteries M and B, the electrode plates were taken out and the state of distribution of sulfur S was confirmed by surface analysis using an X-ray microanalyzer.In battery B, the distribution of sulfur S was concentrated only on the surface layer of the electrode plate. However, it is unevenly distributed inside the electrode plate. On the other hand, in battery cells, it is widely distributed even inside the electrode plate. From this, it can be confirmed that by using the active material of the present invention, the diffusion of sulfuric acid in the electrode plate was improved and the utilization rate was improved.
第６図に、サイクル寿命の比較図を示す。多量の水を用
いた電池Ｃでは、初期容量の５０％となるのが約２３０
サイクルであるのに対して、本発明の電池ムでは約３０
０サイクルと寿命は短かくならない。これは、本発明の
活物質は大きなボアのみが増えたので、活物質の結着性
を悪くすることもなく、サイクル寿命も保たれていると
思われる。FIG. 6 shows a comparison chart of cycle life. In battery C, which uses a large amount of water, 50% of the initial capacity is approximately 230 ml.
cycle, whereas in the battery system of the present invention, it is approximately 30 cycles.
0 cycle and lifespan will not be shortened. This is thought to be because the active material of the present invention only has an increased number of large bores, so the binding properties of the active material are not deteriorated and the cycle life is maintained.
なお１本実施例においては、ナイロンビーズの直径は０
．１μｍを用いたが、大きなボアをあけ、硫酸の拡散を
良くし、利用率を向上させる効果を得るには、ナイロン
ビーズの直径を０．０８７１！１１以上のものを用いね
ばならない。ただし、直径１．Ｑｚｚｍ以上のものであ
ると極板自体の強度が弱まってしまうのでサイクル特性
に悪影響を与えてしまう。Note that in this example, the diameter of the nylon beads is 0.
．． Although 1 μm was used, in order to obtain the effect of making a large bore, improving the diffusion of sulfuric acid, and improving the utilization rate, it is necessary to use a nylon bead with a diameter of 0.0871!11 or more. However, the diameter is 1. If it exceeds Qzzm, the strength of the electrode plate itself will be weakened, which will adversely affect the cycle characteristics.
よって、利用率向上とサイクル特性の両面からみて硫酸
水溶液に可溶性の物質は直径０．Ｏ８ｌ１ｍ〜１．０μ
ｍの範囲で用いることによシ効果がみられる。Therefore, from the viewpoint of both improvement in utilization rate and cycle characteristics, substances soluble in sulfuric acid aqueous solution have a diameter of 0. O8l1m~1.0μ
A positive effect can be seen when used within the range of m.
発明の効果
以上のように本発明によれば、鉛粉に直径０．０８μｍ
〜１．Ｑμｍを有する硫酸水溶液に可溶性の物質を添加
することにより、活物質に硫酸が通過する大きなボアの
み増加させることができた。これによりサイクル特性が
下がることなく、硫酸の拡散も良く、極板の内部まで反
応が進行し、活物質の利用率が向上した。このことから
、エネルギー密度（Ｗ１１／ｋｇ）を格段に向上させる
という効果が得られる。Effects of the Invention As described above, according to the present invention, lead powder has a diameter of 0.08 μm.
~1. By adding a soluble substance to the sulfuric acid aqueous solution having a sulfuric acid aqueous solution having a particle diameter of Qμm, it was possible to increase only the large pores through which sulfuric acid passes through the active material. As a result, the cycle characteristics did not deteriorate, the sulfuric acid diffused well, the reaction progressed to the inside of the electrode plate, and the utilization rate of the active material improved. This provides the effect of significantly improving the energy density (W11/kg).
第１図は本発明の実施例における鉛粉に直径０．０８μ
ｍ〜１．Ｑ／１ｍで化成時の硫酸水溶液に可溶性の物質
を添加することにより、任意の大きな孔径の穴を増加さ
せた活物質の概念図、第２図は本発明の実施例における
活物質及び従来品の孔径分布の比較図、第３図は本発明
の実施例における密閉形鉛蓄電池の概要を示す断面図、
第４図は第３図に示す実施例の密閉形鉛蓄電池及び従来
品の定電流放電曲線の比較図、第５図は充放電サイクル
寿命の比較図を示すものである。
１・・・・・・活物質、２・・・・・・ナイロンビーズ
、３・・・・・・ｏ、０８μｍ〜１．０ｐｍの孔径の穴
、４・・・・・・正極板、５・・・・・・負極板、６・
・・・・・セパレータ、７・・・・・・電槽。
代理人の氏名 弁理士 粟 野 重 孝 ほか１名菓
図
、ぢム 曙ン５
と、ｌｌ−弓り１し７）
第
図
正及叛
ｌ・−活物質
大きなホ０ア
５ ｌＯ
玖！吟間Ｃｈ、、／ｒＪ
ブイグル（裟Figure 1 shows lead powder in an embodiment of the present invention with a diameter of 0.08μ.
m~1. A conceptual diagram of an active material in which pores of arbitrarily large pore size are increased by adding a soluble substance to a sulfuric acid aqueous solution during chemical formation at Q/1m. Figure 2 shows the active material in the example of the present invention and the conventional product. FIG. 3 is a cross-sectional view showing an outline of a sealed lead-acid battery according to an embodiment of the present invention.
FIG. 4 is a comparison diagram of constant current discharge curves of the sealed lead acid battery of the embodiment shown in FIG. 3 and a conventional product, and FIG. 5 is a comparison diagram of charge/discharge cycle life. 1...Active material, 2...Nylon beads, 3...O, hole with a pore diameter of 08 μm to 1.0 pm, 4...Positive electrode plate, 5 ...Negative electrode plate, 6.
... Separator, 7 ... Battery case. Agent's name: Patent attorney Shigetaka Awano and one other famous figure, Akebon 5 and 1-Yuri 1-7) Ginma Ch,,/rJ Bugle (裟
Claims (1)
水溶液に可溶性の物質を添加したペースト状活物質を塗
着した極板を備えた鉛蓄電池。A lead-acid battery comprising an electrode plate coated with a paste-like active material made by adding a substance soluble in a sulfuric acid aqueous solution during formation to lead powder and having a diameter of 0.08 μm to 1.0 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63200593A JPH0249353A (en) | 1988-08-11 | 1988-08-11 | Lead-acid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63200593A JPH0249353A (en) | 1988-08-11 | 1988-08-11 | Lead-acid battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0249353A true JPH0249353A (en) | 1990-02-19 |
Family
ID=16426931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63200593A Pending JPH0249353A (en) | 1988-08-11 | 1988-08-11 | Lead-acid battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249353A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170133650A1 (en) * | 2015-06-26 | 2017-05-11 | Daramic, Llc | Absorbent glass mat separators, vrla batteries, and related methods of manufacture and use |
-
1988
- 1988-08-11 JP JP63200593A patent/JPH0249353A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170133650A1 (en) * | 2015-06-26 | 2017-05-11 | Daramic, Llc | Absorbent glass mat separators, vrla batteries, and related methods of manufacture and use |
| US10056592B2 (en) * | 2015-06-26 | 2018-08-21 | Daramic, Llc | Absorbent glass mat separators, VRLA batteries, and related methods of manufacture and use |
| US10938010B2 (en) | 2015-06-26 | 2021-03-02 | Daramic, Llc | Absorbent glass mat separators, VRLA batteries, and related methods of manufacture and use |
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