JP3511695B2 - Method for producing lead powder for lead-acid battery active material and lead lump for producing lead powder for lead-acid battery active material - Google Patents
Method for producing lead powder for lead-acid battery active material and lead lump for producing lead powder for lead-acid battery active materialInfo
- Publication number
- JP3511695B2 JP3511695B2 JP27413894A JP27413894A JP3511695B2 JP 3511695 B2 JP3511695 B2 JP 3511695B2 JP 27413894 A JP27413894 A JP 27413894A JP 27413894 A JP27413894 A JP 27413894A JP 3511695 B2 JP3511695 B2 JP 3511695B2
- Authority
- JP
- Japan
- Prior art keywords
- lead
- active material
- powder
- lead powder
- producing
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉛蓄電池極板を製造す
るための活物質用鉛粉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead powder for an active material for producing a lead storage battery electrode plate.
【０００２】[0002]
【従来の技術】鉛蓄電池のペースト式極板の製造工程に
は、格子体にペースト状活物質を充填した未乾燥の極板
を恒温・恒湿度雰囲気に放置する熟成工程が含まれる。
熟成工程の目的は、活物質粒子同士および活物質と格子
体間の結合を強くし、極板に必要な強度を付与し、ま
た、活物質の多孔度を上げることである。熟成工程は、
電池の寿命や容量を左右する重要な工程となっている。
熟成工程で上記の結合を強くするためには、一酸化鉛を
主体とする活物質用鉛粉に適度な量の金属鉛を残留さ
せ、熟成工程で前記金属鉛を徐々に酸化させるとよいこ
とが知られている。通常、酸化度が７０〜９０％の鉛粉
が活物質用として用いられている。このような鉛粉は、
鉛塊を投入したドラムを、ドラムに空気を送り込みなが
ら回転させ、鉛塊を粉砕して酸化する方法（ボールミル
法）、または、溶融鉛を撹拌翼によって激しく撹拌し飛
散させて酸化する方法（バートンポット法）で製造され
ている。ボールミル法では、高純度の鉛を円柱状に鋳造
した鉛塊を回転するドラムに多数投入し、鉛塊同士が衝
突して生成した鉛粉が回転するドラムの中で徐々に酸化
されていく。2. Description of the Related Art A process for manufacturing a paste type electrode plate for a lead storage battery includes an aging process in which an undried electrode plate in which a grid body is filled with a paste-like active material is left in a constant temperature and constant humidity atmosphere.
The purpose of the aging step is to strengthen the bond between the active material particles and between the active material and the lattice, to give the electrode plate the necessary strength, and to increase the porosity of the active material. The aging process is
It is an important process that affects the life and capacity of batteries.
In order to strengthen the above-mentioned bond in the aging step, it is good to leave an appropriate amount of metallic lead in the lead powder for active material mainly composed of lead monoxide, and gradually oxidize the metallic lead in the aging step. It has been known. Usually, lead powder having an oxidation degree of 70 to 90% is used for an active material. Such lead powder is
A method of rotating a drum containing lead lumps while feeding air into the drum to pulverize and oxidize the lead lumps (ball mill method) or a method in which molten lead is vigorously stirred and scattered by a stirring blade to oxidize (Burton It is manufactured by the pot method. In the ball mill method, a large number of lead lumps, each of which is made by casting high-purity lead into a cylindrical shape, are put into a rotating drum, and lead powder produced by collision between lead lumps is gradually oxidized in the rotating drum.
【０００３】[0003]
【発明が解決しようとする課題】上記のバートンポット
法で製造された鉛粉は、残留している金属鉛の形状が球
状に近い。ボールミル法による場合でも、表面に凹凸の
ある球に近い形状となっている。このような形状の金属
鉛を熟成工程で酸化し酸化反応を完結させるためには２
４時間程度を要し、製造工程を長くする原因となってい
る。本発明が解決しようとする課題は、熟成工程で金属
鉛の酸化が速く進む活物質用鉛粉を提供することであ
る。また、そのような鉛粉を製造することである。In the lead powder produced by the above Burton pot method, the shape of residual metallic lead is close to spherical. Even in the case of using the ball mill method, the shape is similar to that of a sphere having an uneven surface. In order to complete the oxidation reaction by oxidizing metallic lead having such a shape in the aging step, 2
It takes about 4 hours, which is a cause of lengthening the manufacturing process. The problem to be solved by the present invention is to provide a lead powder for an active material in which the oxidation of metallic lead is accelerated in the aging step. Moreover, it is to manufacture such lead powder.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
の本発明に係る活物質用鉛粉は、一酸化鉛と金属鉛を主
成分とし、金属鉛が薄片状であることを特徴とする。ま
た、本発明に係る製造法は、三角錐形状に鋳造した多数
の鉛塊を回転するドラムに投入し、鉛塊同士を衝突させ
て鉛粉を生成させることを特徴とする。鉛塊の形状は、
角柱、円錐台、三角錐台、樋形状から選ばれる形状であ
ってもよい。The lead powder for an active material according to the present invention for solving the above-mentioned problems is characterized in that lead monoxide and metallic lead are the main components, and the metallic lead is flaky. . Further, the manufacturing method according to the present invention is characterized in that a large number of lead lumps cast in the shape of a triangular pyramid are put into a rotating drum and the lead lumps are made to collide with each other to generate lead powder. The shape of the lead mass is
The shape may be selected from a prism, a truncated cone, a truncated pyramid, and a gutter shape.
【０００５】[0005]
【作用】極板の熟成工程における金属鉛の酸化反応は、
下記の（化１）に示す工程を経て進む。この酸化反応
は、固体（Ｐｂ）、液体（Ｈ2Ｏ）、気体（Ｏ2）の三相
間で起こるため、固体の表面積が大きいほど反応面積が
増加し、酸化反応が短時間で完結することになる。本発
明に係る鉛粉は、金属鉛が薄片状であるので表面積が広
くなり、酸化反応が短時間で完結する。本発明に係る方
法によれば、鉛塊が三角錐形状であるために鉛塊の中に
角部がたくさん存在し鉛塊同士の衝突が激しく起こり、
生成した金属鉛粉は薄片状となる。[Function] The oxidation reaction of metallic lead in the aging process of the electrode plate is
The process proceeds through the process shown in (Chemical formula 1) below. Since this oxidation reaction occurs between the three phases of solid (Pb), liquid (H 2 O) and gas (O 2 ), the reaction area increases as the surface area of the solid increases, and the oxidation reaction is completed in a short time. become. The lead powder according to the present invention has a large surface area because the metallic lead is flaky, and the oxidation reaction is completed in a short time. According to the method of the present invention, since the lead mass has a triangular pyramid shape, there are many corners in the lead mass and the collision of the lead masses occurs violently,
The produced metallic lead powder becomes flaky.
【０００６】[0006]
【化１】 [Chemical 1]
【０００７】[0007]
【実施例】高純度の鉛を正三角錐状に鋳造した多数の鉛
塊を回転するドラムに投入し、鉛粉を製造した。この鉛
粉は、ドラムの中で上部まで持ち上げられた後に衝突す
るため鉛塊同士の衝突が激しく起こる。衝突した鉛塊の
角部で削られて生成した金属鉛粉は薄片状となる。図１
（ａ）は、生成した鉛粉を樹脂に埋め込み研磨して断面
を観察し、金属鉛粉だけを取り出してその形状を模式的
に示したものである。また、図１（ｂ）は、高純度の鉛
を円柱状に鋳造した多数の鉛塊を回転するドラムに投入
して製造した鉛粉（従来例）において、図１（ａ）と同
様に金属鉛粉だけを取り出してその形状を模式的に示し
たものである。図１（ａ）および（ｂ）の比較から、本
発明に係る鉛粉は金属鉛粉が薄片状であることを理解で
きる。上記実施例の鉛粉と従来例の鉛粉をそれぞれ原料
としてペースト状活物質を調製し、これを格子体に充填
して、２４時間熟成した極板と６時間熟成した極板を製
造した。熟成の雰囲気条件は、３５℃、９８％Ｒ．Ｈ．
である。極板製造条件を表１にまとめて示した。Example A large number of lead lumps obtained by casting high-purity lead in the shape of a regular triangular pyramid were put into a rotating drum to produce lead powder. The lead powder collides with each other after being lifted to the upper part in the drum, so that the lead masses collide with each other violently. The metallic lead powder produced by being scraped at the corners of the lead mass that collided becomes flaky. Figure 1
In (a), the produced lead powder is embedded in a resin and polished, the cross section is observed, and only the metallic lead powder is taken out and its shape is schematically shown. Further, FIG. 1 (b) is a lead powder (conventional example) produced by charging a large number of lead ingots in which high-purity lead is cylindrically cast into a rotating drum (conventional example). Only the lead powder is taken out and its shape is schematically shown. From the comparison of FIGS. 1 (a) and 1 (b), it can be understood that the lead powder according to the present invention is a flaky metallic lead powder. A paste-like active material was prepared by using the lead powder of the above-mentioned example and the lead powder of the conventional example as raw materials, and the paste was filled in a grid to manufacture a plate aged for 24 hours and a plate aged for 6 hours. The atmosphere conditions for aging are 35 ° C. and 98% R. H.
Is. The electrode plate production conditions are summarized in Table 1.
【０００８】[0008]
【表１】 [Table 1]
【０００９】これら極板を用いて組み立てた鉛蓄電池
（Ａ〜Ｄ）のサイクル寿命特性を調べた結果を図２に示
す。試験は、１．５Ａ（２．４５Ｖ制限）で２０時間充
電し、１．２５Ａで終止電圧１．７Ｖまで放電する繰返
しを行ない、放電容量を測定するものである。図２から
明らかなように、実施例の鉛粉を活物質に用いた極板
は、熟成工程の時間が短くても、熟成工程が長い場合と
同等の寿命性能を備えている。FIG. 2 shows the results of examining the cycle life characteristics of the lead acid batteries (A to D) assembled using these electrode plates. In the test, charging is performed at 1.5 A (2.45 V limit) for 20 hours, and discharging is repeated at 1.25 A to a final voltage of 1.7 V, and the discharge capacity is measured. As is clear from FIG. 2, the electrode plate using the lead powder of the example as the active material has a life performance equivalent to that in the case where the aging process is long even if the aging process time is short.
【００１０】上記実施例では、ボールミル法による鉛粉
の製造に、鉛塊として図３（ａ）に示すような三角錐形
状のものを用いたが、（ｂ）に示した角柱、（ｃ）に示
した円錐台、（ｄ）に示した三角錐台、（ｅ）に示した
樋形状など、多くの角を有する形状の鉛塊を用いること
により同等の効果を得ることができる。In the above example, the lead powder was manufactured by the ball mill method in the form of a triangular pyramid as shown in FIG. 3 (a), but the prism shown in FIG. 3 (b), (c). The same effect can be obtained by using lead lumps having a shape with many corners such as the truncated cone shown in (1), the truncated pyramid shown in (d), and the gutter shape shown in (e).
【００１１】[0011]
【発明の効果】上述のように、本発明に係る鉛粉は、金
属鉛粉が薄片状であるため、この鉛粉を活物質とした極
板の熟成工程において、金属鉛粉の酸化が速く進み、熟
成工程を短くすることができる。熟成工程を短くしても
電池性能は低下することなく、熟成工程の時間を長くと
った従来の鉛蓄電池と同等の性能を保持している。本発
明に係る方法によれば、薄片状金属鉛粉を含む鉛粉を容
易に製造することができる。As described above, in the lead powder according to the present invention, since the metallic lead powder is in the form of flakes, the metallic lead powder is rapidly oxidized in the aging step of the electrode plate using this lead powder as the active material. The aging process can be shortened. Even if the aging process is shortened, the battery performance does not deteriorate, and the performance is the same as that of the conventional lead storage battery in which the aging process time is long. According to the method of the present invention, lead powder containing flaky metallic lead powder can be easily manufactured.
【図１】本発明に係る実施例の鉛粉と従来の鉛粉におけ
る金属鉛粉の形状を示す模式図である。FIG. 1 is a schematic diagram showing the shapes of metallic lead powder in a lead powder of an example according to the present invention and a conventional lead powder.
【図２】本発明に係る実施例の鉛粉と従来の鉛粉を活物
質に用いた鉛蓄電池のサイクル寿命特性を示す曲線図で
ある。FIG. 2 is a curve diagram showing cycle life characteristics of a lead storage battery using lead powder of an example according to the present invention and conventional lead powder as an active material.
【図３】本発明に係る鉛粉製造用の鉛塊の例を示す斜視
図である。FIG. 3 is a perspective view showing an example of a lead ingot for producing lead powder according to the present invention.
Claims (2)
から選ばれる形状に鋳造した多数の鉛塊を回転するドラ
ムに投入し、鉛塊同士を衝突させて鉛粉を生成させるこ
とを特徴とする鉛蓄電池活物質用鉛粉の製造法。1. A large number of lead lumps cast in a shape selected from a triangular pyramid, a prism, a truncated cone, a triangular pyramid, and a gutter shape are put into a rotating drum, and lead lumps are collided with each other to produce lead powder. A method for producing lead powder for a lead storage battery active material, comprising:
から選ばれる形状であることを特徴とする鉛蓄電池活物
質用鉛粉製造用鉛塊。2. A lead mass for producing lead powder for a lead storage battery active material, which has a shape selected from a triangular pyramid, a prism, a truncated cone, a triangular pyramid and a trough shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27413894A JP3511695B2 (en) | 1994-11-09 | 1994-11-09 | Method for producing lead powder for lead-acid battery active material and lead lump for producing lead powder for lead-acid battery active material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27413894A JP3511695B2 (en) | 1994-11-09 | 1994-11-09 | Method for producing lead powder for lead-acid battery active material and lead lump for producing lead powder for lead-acid battery active material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08138667A JPH08138667A (en) | 1996-05-31 |
| JP3511695B2 true JP3511695B2 (en) | 2004-03-29 |
Family
ID=17537557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27413894A Expired - Fee Related JP3511695B2 (en) | 1994-11-09 | 1994-11-09 | Method for producing lead powder for lead-acid battery active material and lead lump for producing lead powder for lead-acid battery active material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3511695B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5636699B2 (en) * | 2010-03-10 | 2014-12-10 | 株式会社Ｇｓユアサ | Negative electrode plate for lead-acid battery and lead-acid battery using the same |
-
1994
- 1994-11-09 JP JP27413894A patent/JP3511695B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08138667A (en) | 1996-05-31 |
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