JPH0363178B2 - - Google Patents
Info
- Publication number
- JPH0363178B2 JPH0363178B2 JP59148288A JP14828884A JPH0363178B2 JP H0363178 B2 JPH0363178 B2 JP H0363178B2 JP 59148288 A JP59148288 A JP 59148288A JP 14828884 A JP14828884 A JP 14828884A JP H0363178 B2 JPH0363178 B2 JP H0363178B2
- Authority
- JP
- Japan
- Prior art keywords
- lead
- acid
- grid
- negative electrode
- alloy
- 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 - Lifetime
Links
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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/68—Selection of materials for use in lead-acid accumulators
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Description
〔産業上の利用分野〕
本発明は鉛蓄電池の改良、特に正・負極の格子
耳、ストラツプおよびポールなどの導電部の改良
に関するものである。
〔従来の技術〕
鉛蓄電池の導電部、即ち正・負極の格子耳、ス
トラツプおよびポールなどには、一般に樹枝状構
造を有する鉛−アンチモン系合金の鋳造物が用い
られている。
〔発明が解決しようとする問題点〕
鉛−アンチモン系合金あるいは鉛−銀合金のよ
うな共晶合金組成の溶湯を鋳造した構造物は、鉛
リツチの初晶が樹枝状に配列し、その間隙をアン
チモンリツチの共晶が埋めた構造となつている。
この共晶組成の溶湯は凝固温度が低く、樹枝状晶
が形成されたあとで固化する。このとき、温度降
下による溶積収縮のために結晶粒間ばかりでなく
樹枝状晶間の空間でさえ完全には埋めることがで
きない。即ち、樹枝状晶を有する鉛合金鋳造物に
は、結晶粒間および樹枝状晶間にある程度の間隙
を生じることが避け難い。鉛−アンチモン系合金
ではアンチモン量が少ないものほど、また硫黄、
セレン、銅、テルルなどのように初晶凝固の核化
剤となる元素が少ないものほど、上記した間隙は
多くなる。特に、断面積が大きく熱容量の大きな
部分ではこの傾向が顕著であつて、細い桟からな
る格子の本体と比較すると格子耳、ストラツプお
よびポールなどの導電部において表面に開口する
間隙が多くなる。このような間隙のある鉛合金鋳
造物を導電部に用いると、電解液が侵入し、局部
的な酸化、腐食が進行して破損に至る場合があ
る。
〔問題点を解決するための手段〕
本発明は上記の欠点を解決するもので、その要
旨は、格子耳、ストラツプおよびポールからなる
導電部は樹枝状晶構造を有する鉛合金鋳造物から
なり、鋳造物表面に開口する間隙内に耐酸性プラ
スチツクを充填固化させた導電部を用いた鉛蓄電
池にある。
〔作用〕
本発明による鉛蓄電池の導電部は、結晶粒間や
樹枝状晶間の間隙には耐酸性プラススチツクが埋
められているので、希硫酸の浸透を防ぎ、結晶粒
間に多量の硫酸鉛が生成するという腐食の進行を
防ぐことができる。
〔実施例〕
本発明を実施例を示す図面によつて説明する。
第１図は本発明鉛蓄電池を示す要部縦断面模式図
であり、１は負極板で鉛−アンチモン系合金から
なる鋳造格子を有する。２は負極格子耳、３は負
極ストラツプ、４は負極ポールであり、負極格子
耳と負極ストラツプおよび負極ポールはそれぞれ
鉛−アンチモン系合金からなる樹枝状晶構造有す
る鋳造物であり、耐酸性のポリエステル樹脂５が
この鋳造物の表面に付着、被覆され、かつ表面に
開口する間〓内に充填されている。６はセパレー
タ、７は正極格子耳、８は正極ストラツプ、９は
正極ポールであり、正極格子耳と正極ストラツプ
および正極ポールはそれぞれ鉛−アンチモン系合
金からなる樹枝状晶構造を有する鋳造物であり、
耐酸性のポリエステル樹脂５がこの鋳造物の表面
に付着、被覆され、かつ表表面に開口する間〓内
に充填されている。１０は電解液、１１は電槽、
１２は蓋である。第２図は負極格子耳の断面の一
部を拡大したもので、１３は耳の内部に点在する
間〓、１４は耳の表面に開口する間〓であり、
５′はこの間〓１４内に充填されたポリエステル
樹脂である。
鉛合金鋳造物の間隙内にプラスチツクを充填す
る方法には、次のような種々の方法がある。
(1) エポキシ、ポリエステル、ウレタンあるいは
フエノール系などの熱硬化性且つ耐酸性の液状
プラスチツクを鋳造物の表面に塗布し、必要に
応じて減圧状態とし、あるいは加熱して、重
合、硬化させる。
(2) スチロールあるいはアクリル系などの熱可塑
性且つ耐酸性のプラスチツクのモノマー溶液あ
るいは半重合物を鋳造物の表面に塗布し、必要
に応じて減圧状態とし、あるいは加熱して、溶
剤を除去し、あるいは重合させて固化する。
(3) ポリスチロールあるいはポリオレフインなど
の熱可塑性且つ耐酸性のプラスチツクの粉末を
鋳造物表面に付着させるとともに加熱、溶融し
て液状態とし、かつ減圧状態とする。
(4) 上記のようにプラスチツクを間隙内に充填し
たのち、鋳造物表面のプラスチツクはその一部
または全部を除去してもよい。
次に本発明による導電部と従来の鋳造したまま
の導電部とについて行なつた腐食試験結果を次表
に示す。試験は合金組成がPb−2.5％Sb−0.1％
Asで、形状が直径110mmの棒を試片とし、この試
片を比重1.01（20℃）の希硫酸中で３ケ月間、試
片の全表面積に対して0.01mA/cm2および１mA/
cm2の電流で陽分極および陰分極することにより行
つた。なお、本発明による試片は表面の50％にポ
リエステル系樹脂またはエポキシ系樹脂を減圧下
で塗布し、合金結晶の間〓に充填させた後、加熱
して硬化させた。
[Industrial Field of Application] The present invention relates to improvements in lead-acid batteries, and in particular to improvements in conductive parts such as positive and negative grid ears, straps and poles. [Prior Art] Castings of lead-antimony alloys having a dendritic structure are generally used for conductive parts of lead-acid batteries, such as positive and negative grid ears, straps and poles. [Problems to be Solved by the Invention] Structures produced by casting a molten metal with a eutectic alloy composition such as a lead-antimony alloy or a lead-silver alloy have a structure in which lead-rich primary crystals are arranged in a dendritic manner, and the gaps between them are The structure is filled with antimony-rich eutectic.
Molten metal with this eutectic composition has a low solidification temperature and solidifies after dendrites are formed. At this time, not only the spaces between crystal grains but also the spaces between dendrites cannot be completely filled due to melt shrinkage due to temperature drop. That is, in a lead alloy casting having dendrites, it is unavoidable that a certain amount of gaps are created between crystal grains and between dendrites. In lead-antimony alloys, the lower the amount of antimony, the more sulfur,
The fewer the elements that act as nucleating agents for primary crystal solidification, such as selenium, copper, tellurium, etc., the more the above-mentioned gaps become. This tendency is particularly noticeable in parts with a large cross-sectional area and large heat capacity, and compared to the main body of the grid made of thin crosspieces, there are more gaps opening to the surface in conductive parts such as grid ears, straps, and poles. If a lead alloy casting with such a gap is used for a conductive part, the electrolytic solution may penetrate and local oxidation and corrosion may proceed, leading to damage. [Means for Solving the Problems] The present invention solves the above-mentioned drawbacks, and the gist thereof is that the conductive part consisting of the grid ears, straps and poles is made of a lead alloy casting having a dendrite structure, This lead-acid battery uses a conductive part in which acid-resistant plastic is filled and solidified in the gap that opens on the surface of the cast material. [Function] In the conductive part of the lead-acid battery according to the present invention, the gaps between crystal grains and dendrites are filled with acid-resistant plastic. It is possible to prevent the progress of corrosion caused by the formation of [Example] The present invention will be explained with reference to drawings showing examples.
FIG. 1 is a schematic vertical cross-sectional view of the main parts of the lead-acid battery of the present invention, where 1 is a negative electrode plate having a cast grid made of a lead-antimony alloy. 2 is a negative electrode grid ear, 3 is a negative electrode strap, and 4 is a negative electrode pole.The negative electrode grid ears, negative electrode strap, and negative electrode pole are each cast products having a dendrite structure made of a lead-antimony alloy, and are made of acid-resistant polyester. A resin 5 is attached to and coated on the surface of this casting, and is filled in the openings on the surface. 6 is a separator, 7 is a positive electrode lattice ear, 8 is a positive electrode strap, and 9 is a positive electrode pole, and the positive electrode lattice ear, the positive electrode strap, and the positive electrode pole are each a cast product having a dendrite structure made of a lead-antimony alloy. ,
Acid-resistant polyester resin 5 is adhered to and coated on the surface of this casting, and is filled in the gap opening to the surface. 10 is an electrolytic solution, 11 is a battery container,
12 is a lid. FIG. 2 is an enlarged view of a part of the cross section of the negative electrode grid ear, where 13 is the area dotted inside the ear, 14 is the area opening on the surface of the ear,
5' is a polyester resin filled in 14 during this period. There are various methods for filling the gaps in lead alloy castings with plastic, as follows. (1) Apply a thermosetting and acid-resistant liquid plastic such as epoxy, polyester, urethane, or phenol to the surface of the casting, and polymerize and harden it under reduced pressure or heat as necessary. (2) Applying a monomer solution or semi-polymer of thermoplastic and acid-resistant plastic such as styrene or acrylic to the surface of the casting, and removing the solvent by applying reduced pressure or heating as necessary; Alternatively, it is polymerized and solidified. (3) Powder of thermoplastic and acid-resistant plastic such as polystyrene or polyolefin is attached to the surface of the casting, heated and melted to a liquid state, and then brought to a reduced pressure. (4) After filling the gap with plastic as described above, part or all of the plastic on the surface of the casting may be removed. Next, the results of corrosion tests conducted on the conductive part according to the present invention and the conventional conductive part as cast are shown in the following table. In the test, the alloy composition was Pb-2.5% Sb-0.1%
The specimen was made of As and had a diameter of 110 mm. The specimen was placed in dilute sulfuric acid with a specific gravity of 1.01 (20°C) for 3 months at 0.01 mA/cm 2 and 1 mA/cm2 for the total surface area of the specimen.
This was done by positive and negative polarization with a current of cm 2 . In addition, the specimen according to the present invention was coated with polyester resin or epoxy resin on 50% of the surface under reduced pressure, filled between the alloy crystals, and then heated and cured.
以上述べたように本発明によれば、正・負極の
格子耳、ストラツプなどの導電部に用いる樹枝状
晶構造を有する鉛合金鋳造物の耐食性を向上さ
せ、鉛蓄電池の信頼性を高めることができる。
As described above, according to the present invention, it is possible to improve the corrosion resistance of lead alloy castings having a dendrite structure used for conductive parts such as positive and negative electrode grid ears and straps, thereby increasing the reliability of lead-acid batteries. can.
第１図は本発明になる鉛蓄電池を示す要部縦断
面模式図、第２図は本発明になる鉛蓄電池の負極
格子耳の一部を示す拡大した断面図である。
１…負極板、２…負極格子耳、３…負極ストラ
ツプ、４…負極ポール、５，５′……耐酸性樹脂、
７…正極格子耳、８…正極ストラツプ、９…正極
ポール、１３…内部の間〓、１４…表面に開口す
る間〓。
FIG. 1 is a schematic vertical cross-sectional view of a main part of a lead-acid battery according to the present invention, and FIG. 2 is an enlarged cross-sectional view showing a part of a negative electrode grid lug of the lead-acid battery according to the present invention. 1... Negative electrode plate, 2... Negative electrode grid lug, 3... Negative electrode strap, 4... Negative pole, 5, 5'... Acid-resistant resin,
7...Positive grid ear, 8...Positive strap, 9...Positive pole, 13...Between the inside, 14...Between the opening on the surface.
Claims (1)
びポール４，９などの導電部を有する鉛蓄電池で
あつて、格子耳２，７、ストラツプ３，８および
ポール４，９からなる導電部は樹枝状晶構造を有
する鉛合金鋳造物からなり、表面に開口する間〓
１４内に耐酸性プラスチツク５，５′が充填固化
されたものである鉛蓄電池。1. A lead-acid battery having conductive parts such as a grid, grid ears 2, 7, straps 3, 8, and poles 4, 9. It is made of a lead alloy casting with a dendrite structure and has an opening on the surface.
A lead-acid battery in which acid-resistant plastics 5, 5' are filled and solidified inside 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59148288A JPS6127067A (en) | 1984-07-16 | 1984-07-16 | Lead-acid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59148288A JPS6127067A (en) | 1984-07-16 | 1984-07-16 | Lead-acid battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6127067A JPS6127067A (en) | 1986-02-06 |
| JPH0363178B2 true JPH0363178B2 (en) | 1991-09-30 |
Family
ID=15449415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59148288A Granted JPS6127067A (en) | 1984-07-16 | 1984-07-16 | Lead-acid battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6127067A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2022196566A1 (en) | 2021-03-16 | 2022-09-22 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52151331U (en) * | 1976-05-13 | 1977-11-16 | ||
| JPS57143266A (en) * | 1981-02-27 | 1982-09-04 | Shin Kobe Electric Mach Co Ltd | Plate for lead acid battery |
-
1984
- 1984-07-16 JP JP59148288A patent/JPS6127067A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6127067A (en) | 1986-02-06 |
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