JP2696975B2 - Lead-acid battery group welding method - Google Patents

Lead-acid battery group welding method

Info

Publication number
JP2696975B2
JP2696975B2 JP63209263A JP20926388A JP2696975B2 JP 2696975 B2 JP2696975 B2 JP 2696975B2 JP 63209263 A JP63209263 A JP 63209263A JP 20926388 A JP20926388 A JP 20926388A JP 2696975 B2 JP2696975 B2 JP 2696975B2
Authority
JP
Japan
Prior art keywords
ear
group
welding
strap
group welding
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
Application number
JP63209263A
Other languages
Japanese (ja)
Other versions
JPH0256853A (en
Inventor
良佐 森成
忠司 米田
恒美 相羽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shin Kobe Electric Machinery Co Ltd
Original Assignee
Shin Kobe Electric Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shin Kobe Electric Machinery Co Ltd filed Critical Shin Kobe Electric Machinery Co Ltd
Priority to JP63209263A priority Critical patent/JP2696975B2/en
Publication of JPH0256853A publication Critical patent/JPH0256853A/en
Application granted granted Critical
Publication of JP2696975B2 publication Critical patent/JP2696975B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • H01M50/541—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges for 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、自動車用等として使用される鉛蓄電池の群
溶接方法に関し、特に正極板にPb−Sb系合金格子を用
い、負極板にPb−Ca系合金格子を用いたハイブリット形
電池（以下、HB電池と称する。）の各極板における耳部
を一括して溶接する群溶接方法に適用して好適な鉛蓄電
池の群溶接方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a group welding method for lead-acid batteries used for automobiles and the like, and more particularly to a Pb-Sb-based alloy grid for a positive electrode plate and Pb for a negative electrode plate. The present invention relates to a group welding method for a lead storage battery which is suitable for a group welding method in which lugs of respective electrode plates of a hybrid battery (hereinafter referred to as an HB battery) using a Ca-based alloy lattice are collectively welded. It is.

［従来技術］ 自動車用鉛蓄電池の群溶接作業は、各セル内に納めら
れた各極板を、正極板は正極板同士、負極板は負極板同
士、その耳部をひとまとめにして溶接してストラップを
形成し、該ストラップで各極板を電気的に接続する作業
である。[Prior art] In group welding of lead-acid batteries for automobiles, each electrode plate housed in each cell is welded by collectively welding the positive plates to the positive plates, the negative plates to the negative plates, and their lugs. This is an operation of forming a strap and electrically connecting each electrode plate with the strap.

第４図（Ａ）（Ｂ）はその一例を示したものであり、
同極性の各極板１の耳部２を群溶接することによりPb合
金のストラップ３を形成し、このストラップ３により各
極板１を電気的に接続している。FIGS. 4 (A) and 4 (B) show an example thereof.
The Pb alloy straps 3 are formed by group welding the ears 2 of the poles 1 of the same polarity, and the straps 3 electrically connect the poles 1.

この場合、群溶接方法としては、いくつかの方法があ
る。その中で、図示しないが櫛歯状の冷し金の間に耳部
２を挟み、その上からPb合金の溶加棒をガスバーナーで
加熱溶接させてこれを各耳部２の間に流し込み、同時に
各耳部２を溶融させてストラップ３を形成させると同時
に各耳部２の溶接を行なうバーナー式と称する方式と、
ストラップ３の形状した金型の凹部にPb合金溶湯を流し
込み、引き続きこの溶湯中に各耳部２を浸漬して該溶湯
を凝固させて各耳部２の溶接とストラップ３の形成を行
なうキャストオンストラップ式と称する方法とが、代表
的な方法である。In this case, there are several methods for group welding. In this case, although not shown, the lugs 2 are sandwiched between comb-shaped chills, and a welding rod of a Pb alloy is heated and welded from above with a gas burner and poured between the lugs 2. A method called a burner type in which each ear 2 is simultaneously melted to form the strap 3 and at the same time, each ear 2 is welded;
A cast Pon alloy is poured into a concave portion of the mold having the shape of the strap 3, and each ear 2 is immersed in the molten metal to solidify the molten metal, thereby welding each ear 2 and forming the strap 3. A method called a strap type is a typical method.

第５図にバーナー式による群溶接部の断面形状の代表
例を示す。同図で、５枚の耳部２のうちの右側３枚の耳
部２は溶融境界部（耳部２の溶融した所としなかった所
との境界）４がストラップ３の下面3Aより下（極板１
側）に位置した形で溶接されている。このような溶接状
態を呈するのがバーナー式による群溶接方法の特徴であ
る。これに対して、キャストオンストラップ式の場合に
は、溶融境界部４がストラップ３の内部に位置した形で
溶接されているのが一般的である。FIG. 5 shows a representative example of the cross-sectional shape of the group welded portion by the burner method. In the drawing, the right three ears 2 of the five ears 2 have a fusion boundary portion (a boundary between a portion where the ear portion 2 is melted and a portion where the ear portion 2 is not fused) 4 below the lower surface 3A of the strap 3 (see FIG. Electrode plate 1
Side). It is a feature of the group welding method based on the burner method that such a welding state is exhibited. On the other hand, in the case of the cast-on-strap type, it is common that the fusion boundary portion 4 is welded in a form positioned inside the strap 3.

ところで、従来は溶融境界部４がどこに位置するよう
に溶接するかという点に関してはほとんど注意が払われ
ておらず、ストラップ３と各耳部２とが一体化されてい
れば問題ないといった認識でしか群溶接が行なわれてい
なかった。Conventionally, little attention has been paid to where the fusion boundary 4 is welded, and it is recognized that there is no problem if the strap 3 and each ear 2 are integrated. Only group welding was performed.

［発明が解決しようとする課題］ 最近、自動車用鉛蓄電池としてHB電池の使用が広まり
つつあるが、この種の電池には１つの欠点がある。それ
は、高温下で負極側の群溶接部が腐食され易いというこ
とである。より正確に云うと、高温下で電池が使用さ
れ、電界液が蒸発し、群溶接部が露出すると、その表面
で硫酸が濃縮され、ストラップ３を形成してするPb−Sb
系合金と耳部２を形成しているPb−Ca系合金との接合部
である溶融境界部４において腐食が進行するというもの
である。[Problems to be Solved by the Invention] Recently, the use of HB batteries as lead storage batteries for automobiles has been widespread, but this type of battery has one disadvantage. That is, the group weld on the negative electrode side is easily corroded at a high temperature. More precisely, when the battery is used at a high temperature, the electrolytic solution evaporates, and when the group weld is exposed, sulfuric acid is concentrated on the surface thereof, forming Pb-Sb forming the strap 3.
Corrosion progresses at a fusion boundary 4 which is a joint between the base alloy and the Pb-Ca based alloy forming the ears 2.

最近、自動車のエンジンルームの高温化が著しく、こ
の中に納められる電池の温度は80〜90゜に達する。この
ような状況下でHB電池が使用されると、正極側に比べて
負極側で顕著な腐食が生じ、ストラップ３と耳部２との
溶融境界部４で耳部２が析損してしまう非常に厄介な問
題が生じている。Recently, the temperature of the engine room of an automobile has been remarkably high, and the temperature of the battery contained therein reaches 80 to 90 degrees. When the HB battery is used in such a situation, significant corrosion occurs on the negative electrode side as compared with the positive electrode side, and the ears 2 are deposited and damaged at the fusion boundary 4 between the strap 3 and the ears 2. Has a troublesome problem.

一般に２種の金属を溶接した場合、その溶融境界部で
は機械的強度や耐食性が母材のそれに比べて低下するこ
とが多い。それ故、異種の金属に関しては注意を要する
わけであるが、HB電池の負極側における群溶接部の高温
下での腐食は、電解液が関与したものであるため、溶融
境界部４の位置が非常に重要なポイントとなる。即ち、
腐食が生じるためには、電解液の存在が不可欠であるわ
けで、溶融境界部４が電解液と接触し易い位置にあるか
否かで、群溶接部の耐食性が決ってくるわけである。In general, when two kinds of metals are welded, mechanical strength and corrosion resistance often decrease at the fusion boundary portion as compared with those of the base material. Therefore, it is necessary to pay attention to the dissimilar metals. However, since the corrosion of the group weld on the negative electrode side of the HB battery at a high temperature is related to the electrolytic solution, the position of the molten boundary portion 4 may be reduced. This is a very important point. That is,
In order for corrosion to occur, the presence of the electrolytic solution is indispensable, and the corrosion resistance of the group welded portion is determined by whether or not the molten boundary portion 4 is at a position where the electrolytic solution easily contacts.

それ故、第６図に示した如く、溶融境界部４を完全に
ストラップ３の内部に収納し、十分なフィレット５によ
りストラップ３内部への電解液の侵入を阻止することに
より、電解液を溶融境界部４に直接接触させないような
構造の群溶接部を得ることが、高温耐食性を確保する上
で最も重要なことになるわけである。Therefore, as shown in FIG. 6, the molten boundary portion 4 is completely housed inside the strap 3 and the electrolyte is melted by preventing the electrolyte solution from entering the strap 3 with a sufficient fillet 5. Obtaining a group weld having a structure that does not directly contact the boundary part 4 is the most important in securing high-temperature corrosion resistance.

ところで、第６図に示すような好ましい群溶接状態を
得るためには、溶接条件をかなり微妙に制御してやるこ
とが必要である。例えば、Cu線同士を半田付けする時に
は、溶接しようとするCu線は半田に比べて十分高い融点
をもっており、溶融した半田を溶接部に供給してもCu線
自体は溶ける心配がない。これに対し、群溶接の場合
は、約325℃のPb−Ca系合金の耳部２の周囲に、400〜50
0℃のPb−Sb系合金溶湯が注入されるわけであるから、
よほど溶接条件を上手に制御しないと、耳部２ほとんど
が過剰溶融状態となる。即ち、第５図の右側３枚の耳部
２のような溶接状態を呈するわけで、このような状態が
最も耐食性が心配される状態である。ここに群溶接の難
しさがあるわけである。By the way, in order to obtain a preferable group welding state as shown in FIG. 6, it is necessary to control the welding conditions quite finely. For example, when soldering Cu wires, the Cu wire to be welded has a melting point sufficiently higher than that of the solder, and there is no fear that the Cu wire itself will melt even if the molten solder is supplied to the welded portion. On the other hand, in the case of group welding, the periphery of the Pb-Ca alloy
Since the molten Pb-Sb alloy at 0 ° C is injected,
If the welding conditions are not well controlled, most of the ears 2 will be in an excessively molten state. That is, a welding state like the three right ears 2 in FIG. 5 is exhibited, and such a state is a state where the corrosion resistance is most concerned. Here is the difficulty of group welding.

このようなことから、過剰溶接状態を呈さないような
群溶接部を安定して得るためには、かなりの熟練と溶接
条件の微妙な制御が必要なわけで、より容易に群溶接が
できる群溶接方法が強く求められている。For this reason, in order to stably obtain a group weld that does not exhibit an excessive welding state, considerable skill and delicate control of welding conditions are necessary, and a group that can perform group welding more easily. There is a strong need for a welding method.

［課題を解決するための手段］ 上記の要求を達成するための本発明の手段を説明する
と、本発明は同極性の各極板の各耳部を群溶接してスト
ラップを形成する鉛蓄電池の群溶接方法において、 耳部上端より所定長さ離れた位置より下部の断面積が
連続して大きい耳部をそれぞれ有する各極板を用いて、
前記各耳部の上部を群溶接することを特徴とする。[Means for Solving the Problems] The means of the present invention for achieving the above-mentioned requirements will be described. The present invention relates to a lead-acid battery in which a strap is formed by group-welding each ear of each electrode plate having the same polarity. In the group welding method, using each of the electrode plates having ear portions each having a continuously larger cross-sectional area below a position apart from the ear upper end by a predetermined length,
The upper part of each ear part is group-welded.

［作用］ このように耳部上端より所定の位置より下部の断面積
が連続して大きい耳部をそれぞれ有する各極板を用いて
群溶接すると、各耳部の熱容量が大きくなり、各耳部が
適度に温度上昇するようになり、各耳部と溶湯とのヒー
トバランスがよくなって、溶融境界部がストラップの内
部に位置し、且つ耳部側面が十分に溶接されてストラッ
プの下面に十分なフィレットが形成される群溶接を容易
に行うことができる。[Operation] When the group welding is performed using the respective electrode plates each having the ear portion having a continuously larger cross-sectional area below the predetermined position from the upper end of the ear portion, the heat capacity of each ear portion is increased, and each ear portion is increased. Temperature rises moderately, the heat balance between each ear and the molten metal is improved, the fusion boundary is located inside the strap, and the ear side is sufficiently welded to the lower surface of the strap. It is possible to easily perform group welding in which a large fillet is formed.

また、耳部上端より所定の位置より下部の耳部断面積
を連続的に大きくすると、極板の内部抵抗が小さくな
り、放電特性がよくなる。Further, when the cross-sectional area of the ear portion below the predetermined position from the upper end of the ear portion is continuously increased, the internal resistance of the electrode plate is reduced, and the discharge characteristics are improved.

［実施例］ 以下、本発明の実施例を図面を参照して詳細に説明す
る。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

第１図及び第２図（Ａ）（Ｂ）は本発明の一実施例を
示したものである。本実施例では、耳部幅がw1で、耳部
上部厚みがt1で、該耳部上部の上端より所定長さh1下が
った位置より下部の耳部厚みが耳部上部の厚みt1より厚
いt2で連続的に厚くなっている（換言すれば、断面積が
連続して大きくなっている）耳部２を有する複数の極板
１を用いて、各耳部２の上部を群溶接し、ストラップ３
を形成する。FIGS. 1 and 2A and 2B show an embodiment of the present invention. In this embodiment, in the ear region width w 1, with ears upper thickness t 1, given from the upper end of the ear portion upper length h 1 lowered lower ears thicker position of the ears upper thickness t By using a plurality of electrode plates 1 having ears 2 that are continuously thickened at t 2 that is larger than 1 (in other words, the cross-sectional area is continuously increased), the upper part of each ear 2 is Group welding, strap 3
To form

このようにすると、断面積が大きく、熱容量の大きい
厚みt2の耳部下部の存在により、溶湯と各耳部２とのヒ
ートバランスが良くなって、溶融境界部４がストラップ
３の内部に位置し、且つ各耳部２の側面が十分に溶接さ
れてストラップ３の下面に十分なフィレット５が形成さ
れる群溶接を容易に行うことができる。従って、耳部２
の側面の溶接が不十分でそこに電解液が侵入する心配が
なくなる。この場合、単純に耳部２の全体の厚さを増加
させると、耳部２の側面が溶接されず、フィレット５が
形成されないという結果になり易い。このため、厚みt2
の厚肉の耳部下部より先の耳部上部は適度に温度が上り
易いように薄肉にし、該厚肉の耳部下部の上端の僅か上
の部分から下の極板１側の厚肉部分では完全に過剰溶融
に阻止するように、厚みt2の寸法を決定する。With this arrangement, the heat balance between the molten metal and each ear portion 2 is improved due to the presence of the lower portion of the ear portion having a large sectional area and a large heat capacity and a thickness t 2 , and the molten boundary portion 4 is located inside the strap 3. In addition, it is possible to easily perform the group welding in which the side surface of each ear portion 2 is sufficiently welded to form a sufficient fillet 5 on the lower surface of the strap 3. Therefore, the ear 2
There is no need to worry that the electrolyte may enter the side because of insufficient welding. In this case, simply increasing the entire thickness of the ear portion 2 tends to result in that the side surfaces of the ear portion 2 are not welded and the fillet 5 is not formed. Therefore, the thickness t 2
The upper part of the ear part ahead of the lower part of the thick ear part is made thin so that the temperature easily rises appropriately, and the thick part on the side of the electrode plate 1 from a part slightly above the upper end of the lower part of the thick ear part in to block completely excessive melting, to determine the dimensions of the thickness t 2.

本発明で用いる極板１としては、上記実施例のものば
かりでなく、第３図（Ａ）（Ｂ）に示すような構造のも
の等でもよい。The electrode plate 1 used in the present invention is not limited to the one in the above embodiment, but may be one having a structure as shown in FIGS. 3 (A) and 3 (B).

第３図（Ａ）（Ｂ）は、耳部上端より所定長さ位置よ
り下の耳部下部が、熱容量を増大させるため、幅が耳部
上部より連続的に広くしかもその状態が極板１まで続い
ている（換言すれば、断面積が連続して大きくなってい
る）耳部２を有する極板１の例を示したものである。FIGS. 3 (A) and 3 (B) show that the lower part of the ear below a predetermined length position from the upper end of the ear increases the heat capacity, so that the width is continuously larger than the upper part of the ear and the state is the electrode plate 1. This is an example of an electrode plate 1 having an ear portion 2 which continues to the above (in other words, has a continuously increasing cross-sectional area).

なお、本発明の技術は、前述した如くヒートバランス
の改善を図るものであるから、単にHB電池の負極側の群
溶接部に対して効果を発揮することにとどまらず、正，
負の区別なくいずれの電池に適用しても群溶接性の向上
に効果を発揮するものであることは言うまでもない。Since the technique of the present invention is intended to improve the heat balance as described above, it is not limited to exerting the effect on the group welded portion on the negative electrode side of the HB battery.
It goes without saying that the application to any of the batteries without distinction is effective in improving the group weldability.

［発明の効果］ 以上説明したように本発明では、耳部上端より所定の
位置より下部の断面積が連続して大きい耳部をそれぞれ
有する各極板を用いて群溶接するので、各耳部の熱容量
が大きくなり、各耳部が適度に温度上昇するようにな
り、各耳部と溶湯とのヒートバランスが良くなって、溶
融境界部がストラップの内部に位置し、且つ耳部の側面
が十分に溶接されてストラップの下面に十分なフィレッ
トが形成される群溶接を容易に行うことができる。従っ
て、本発明によれば、群溶接部の高温耐食性を大幅に向
上させることができる。[Effects of the Invention] As described above, in the present invention, since group welding is performed using each electrode plate having ear portions each having a continuously larger cross-sectional area below a predetermined position from the upper end of each ear portion, each ear portion is welded. The heat capacity of each ear part is increased appropriately, the heat balance between each ear part and the molten metal is improved, the fusion boundary part is located inside the strap, and the side surface of the ear part is It is possible to easily perform a group welding that is sufficiently welded to form a sufficient fillet on the lower surface of the strap. Therefore, according to the present invention, the high-temperature corrosion resistance of the group weld can be significantly improved.

また、耳部上端より所定の位置より下部の耳部断面積
を連続的に大きくしているので、極板の内部抵抗が小さ
くなり、放電特性がよくなる利点がある。Further, since the cross-sectional area of the ear portion below the predetermined position from the upper end of the ear portion is continuously increased, there is an advantage that the internal resistance of the electrode plate is reduced and the discharge characteristics are improved.

【図面の簡単な説明】[Brief description of the drawings]

第１図は本発明に係る鉛蓄電池の群溶接方法で得られた
群溶接部の一例を示す縦断面図、第２図（Ａ）（Ｂ）は
第１図で用いている極板の耳部の側面図及び正面図、第
３図（Ａ）（Ｂ）は本発明で用いる耳部の他の例を示す
側面図及び正面図、第４図（Ａ）（Ｂ）は従来の群溶接
部の側面図及び正面図、第５図は従来の群溶接部の縦断
面図、第６図は従来の群溶接部のうち最も良好な溶接が
なされたものの縦断面図である。 １……極板、２……耳部、３……ストラップ、3A……ス
トラップ下面、４……溶融境界部、５……フィレット。FIG. 1 is a longitudinal sectional view showing an example of a group welded portion obtained by the group welding method for lead-acid batteries according to the present invention, and FIGS. 2 (A) and (B) are ears of an electrode plate used in FIG. 3 (A) and 3 (B) are side and front views showing another example of the ear used in the present invention, and FIGS. 4 (A) and 4 (B) are conventional group welding. 5 is a longitudinal sectional view of a conventional group weld, and FIG. 6 is a longitudinal sectional view of the conventional group weld where the best welding is performed. 1 ... electrode plate, 2 ... ears, 3 ... strap, 3A ... strap lower surface, 4 ... fusion boundary, 5 ... fillet.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】同極性の各極板の各耳部を群溶接してスト
ラップを形成する鉛蓄電池の群溶接方法において、 耳部上端より所定長さ離れた位置より下部の断面積が連
続して大きい耳部をそれぞれ有する各極板を用いて、前
記各耳部の上部を群溶接することを特徴とする鉛蓄電池
の群溶接方法。1. A lead-acid battery group welding method for forming a strap by group-welding each ear part of each electrode plate of the same polarity, wherein a cross-sectional area of a lower part of a part lower than a position separated by a predetermined length from an upper end of the ear part is continuous. A group welding of an upper part of each ear using each electrode plate having a large ear.
JP63209263A 1988-08-23 1988-08-23 Lead-acid battery group welding method Expired - Lifetime JP2696975B2 (en)

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JP63209263A JP2696975B2 (en) 1988-08-23 1988-08-23 Lead-acid battery group welding method

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Application Number Priority Date Filing Date Title
JP63209263A JP2696975B2 (en) 1988-08-23 1988-08-23 Lead-acid battery group welding method

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JPH0256853A JPH0256853A (en) 1990-02-26
JP2696975B2 true JP2696975B2 (en) 1998-01-14

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JP (1) JP2696975B2 (en)

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Publication number Priority date Publication date Assignee Title
US5810039A (en) * 1995-08-11 1998-09-22 Solvay (Societe Anonyme) Module for extracting fluid from a hollow vessel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0799687B2 (en) * 1987-03-31 1995-10-25 新神戸電機株式会社 Method of manufacturing electrode plate group for lead acid battery

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