JPS60167267A - Electrode base plates for lead storage battery - Google Patents

Abstract

PURPOSE:To prevent any curving of electrode plates which might occur due to their expansion by specifying the ratio of the length of vertical grid bones to that of lateral grid bones which form each space into which an active material is to be packed when grid-like base plates are prepared from a thin lead-alloy plate by punching. CONSTITUTION:When forming electrode base plates 1 for a lead storage battery, the ratio of the length (a) of vertical grid bones 4 to the length (b) of lateral grid bones 5 is adjusted to be more than 1 preferably about 3.5; two vertical grid bones 4 and two lateral grid bones 5 surround each space 6 into which an active material is to be packed. As a result, after a plate group is made by fixing the lug 2 and the legs 3 of each base plate 1 to a strap and a container, the vertical expansion of the base plate 1 is smaller than its lateral expansion. Therefore the is no possibility that the plate formed by packing the active material is deformed due to curving or similar cause. Accordingly the reliability and the life of the plates can be improved by preventing any separation of the active material from the plates or short circuits between the plates.

Description

【発明の詳細な説明】 本発明は鉛蓄電池用極板基板の改良に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in electrode plate substrates for lead-acid batteries.

従来鉛蓄電池用極板用の格子基板は鋳造方式によって製
造しているものであるが、近時電池のメンテナンスフリ
ー化が要求されるとともに、電池の軽量化、高容量化並
びに長寿命化が要望されるため上記の鋳造方式に代って
機械加工方式即ちエクスノ４’ンド加工方式や打抜加工
方式が開発され実用化が進んでいる。Conventionally, grid substrates for electrode plates for lead-acid batteries have been manufactured using a casting method, but recently there has been a demand for batteries to be maintenance-free, as well as lighter weight, higher capacity, and longer life. Therefore, in place of the above-mentioned casting method, machining methods, such as an extended 4'-end processing method and a punching method, have been developed and are being put into practical use.

面Ｉ−イ打抜加Ｔ古ｔＶｒおいては鉛又は鉛介全板の圧
延加工による薄板を格子形状に打抜して第１図に示す格
子基板１を形成するものである。In the surface I-A punching process, a thin plate made of lead or lead-filled plate is punched into a grid shape to form the grid substrate 1 shown in FIG.

この場合該基板の打抜方法を示すと第２図に示す如くで
ちる。即ち圧延加工された鉛又は鉛合金薄板（以下鉛合
金薄板という）７の圧延方向（長さ方向）、ＬＤに沿っ
て、基板の上下方向が鉛合金薄板７の横方向Ｔ、Ｄと一
致するようにして２枚の打抜基板１，１′をその足部３
にて連接せしめて同時に得ているものである。なお２は
基板の耳部、４は縦格子骨、５は横格子骨でその長さ関
係は、縦格子骨の長さく横格子骨の長さである。６はこ
の格子骨にて囲まれて形成された活物質充填空間部であ
る。In this case, the method of punching out the substrate is as shown in FIG. That is, along the rolling direction (length direction) and LD of the rolled lead or lead alloy thin plate (hereinafter referred to as lead alloy thin plate) 7, the vertical direction of the substrate coincides with the lateral directions T and D of the lead alloy thin plate 7. In this way, the two punched substrates 1 and 1' are attached to their legs 3.
They are connected and obtained at the same time. Note that 2 is an ear part of the base plate, 4 is a vertical lattice bone, and 5 is a horizontal lattice bone, and the length relationship is that the length of the vertical lattice bone is the length of the horizontal lattice bone. Reference numeral 6 denotes an active material filling space surrounded by the lattice ribs.

このような縦格子骨に比し横格子骨を長くした基板１，
１′を蓄電池用極板として使用した場合には、極板は必
然的に、その基板が圧延方向　゛（Ｌ、Ｄ　）に対する
直角方向（Ｔ、Ｄ　）即ち基板の上下方向に伸びるため
蓄電池の使用中に極板は耳部２及び足部３の方向に伸び
る。ところが耳部２はストラップに、足部３は電槽のく
らに固定されているため極板は湾曲を余儀なくされるか
または耳部と反対側の部分例えば耳部が右側に設けであ
る場合左側部分が伸びて相手極のストラップと接触して
短絡をおこし蓄電池の寿命を短くしているものである。A substrate 1 in which horizontal lattice bones are longer than such vertical lattice bones,
When 1' is used as an electrode plate for a storage battery, the electrode plate inevitably extends in the direction (T, D) perpendicular to the rolling direction (L, D), that is, in the vertical direction of the substrate. During use, the plate extends in the direction of the ears 2 and feet 3. However, since the ear part 2 is fixed to the strap and the foot part 3 is fixed to the shoulder of the battery case, the electrode plate is forced to be bent or the part on the opposite side of the ear part, for example, the left side if the ear part is installed on the right side. The part stretches and comes into contact with the other strap, causing a short circuit and shortening the battery's lifespan.

なおこの伸びは活物質の体積膨張によって生ずる応力が
基板に加わることによっておこるこ゛とが証明されてい
る。It has been proven that this elongation is caused by stress caused by volumetric expansion of the active material being applied to the substrate.

本発明はかかる現状に鑑み鋭意研究を行った結果、耳部
及び足部の方向（上下方向）に伸びを生じにくクシた鉛
蓄電池用極板用基板を開発したものである。即ち本発明
は鉛または鉛合金薄板から形成された機械加工方式格子
基板の縦格子骨と横格子骨にて囲まれた活物質充填空間
部を、縦格子骨の長さａと横格子骨の長さｂとの比がａ
／ｂ≧１にて形成したものである。The present invention has been made as a result of extensive research in view of the current situation, and has developed a combed lead-acid battery electrode plate substrate that is resistant to elongation in the direction of the ears and feet (in the vertical direction). That is, in the present invention, an active material filling space surrounded by vertical lattice bones and horizontal lattice bones of a machined lattice substrate formed from a thin lead or lead alloy thin plate is defined by the length a of the vertical lattice bones and the length a of the horizontal lattice bones. The ratio to length b is a
/b≧1.

次に本発明の実施例について説明する。Next, examples of the present invention will be described.

連続鋳造圧延によシ得た鉛合金薄板から打抜方式によっ
て第３図示の如き格子基板１を得た。A lattice substrate 1 as shown in the third figure was obtained by punching from a lead alloy thin plate obtained by continuous casting and rolling.

活物質充填空間部６を囲む縦格子骨４と横格子骨５の各
々の長さをａおよびｂとしたときの両長さ比ａ／ｂを３
．５とし本発明基板を得た。図中２は耳部、３は足部で
ある。When the lengths of the vertical lattice bones 4 and the horizontal lattice bones 5 surrounding the active material filling space 6 are a and b, the length ratio a/b is 3.
．． 5 to obtain a substrate of the present invention. In the figure, 2 is an ear part and 3 is a foot part.

上記実施例にて得た基板と従来の基板に活物質を充填し
てＮＳ　４０タイプの鉛蓄電池を作成し、過充電寿命試
験を５サイクル実施した後の正極板の上下方向（ＰＱ力
方向の伸びを第１表に示す。An NS 40 type lead-acid battery was prepared by filling the substrate obtained in the above example and a conventional substrate with an active material, and after conducting an overcharge life test for 5 cycles, the positive electrode plate was moved in the vertical direction (in the PQ force direction). The elongation is shown in Table 1.

第１表 さらに、縦格子骨４の長さａと横格子骨５の長さｂの比
をそれぞれ変えた基板に活物質を充填して電池を作成し
これに過充電寿命試験を５サイクル行いそのときの上下
方向（ＰＱ力方向の基板の平均伸びε１と横方向（Ｒ８
方向）の基板の平均伸びε２との比εｌ／ε２を測定し
た結果は第２表の通シである。Table 1 Furthermore, batteries were prepared by filling active materials into substrates with different ratios of the length a of the vertical lattice ribs 4 and the length b of the horizontal lattice ribs 5, and an overcharge life test was performed on these for 5 cycles. At that time, the average elongation ε1 of the substrate in the vertical direction (PQ force direction) and the horizontal direction (R8
The results of measuring the ratio εl/ε2 to the average elongation ε2 of the substrate in the direction (direction) are shown in Table 2.

第２表 尚、第４図示の如く耳部２近傍の置数を増やす等電流密
度等を考慮して１つの基板１にａ／ｂの値か異なる活物
質充填空間部６を設けることもできる。Table 2 Note that as shown in Figure 4, active material filling spaces 6 with different a/b values may be provided on one substrate 1 in consideration of equal current densities, etc. by increasing the number of locations near the ears 2. .

以上の如く本発明基板によれば基板の伸びが少なくとも
上下方向（縦方向）に対する伸びが横方向に対する伸び
より極めて少ないため活物質を充填した極板の形状にお
いて湾曲等の変化は殆んど生せず、又これに伴って活物
質が脱落するようなこともなくまた他極板との短絡もお
こらず鉛蓄電池として長寿命のものをうる等顕著な効果
を有する。As described above, according to the substrate of the present invention, since the elongation of the substrate in at least the vertical direction (vertical direction) is extremely smaller than the elongation in the horizontal direction, changes such as curvature hardly occur in the shape of the electrode plate filled with the active material. Furthermore, the active material does not fall off, and short circuits with other electrode plates do not occur, resulting in a long-life lead-acid battery.

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

第１図は従来の鉛蓄電池極板用基板の平面図、第２図は
連続圧延による鉛合金薄板を打抜加工平面図である。 １．１′・・・打抜基板、２・・・耳部、３・・・足部
、４・・・縦格子骨、５・・・横格子骨、６・・・活物
質充填空間部、７・・・鉛合金薄板、ａ・・・縦格子骨
の長さ、ｂ・・・横格子骨の長さ。 出願人代理人　弁理士　鈴　江　武　彦第１図 第２図 第３図 第４図FIG. 1 is a plan view of a conventional lead-acid battery electrode plate substrate, and FIG. 2 is a plan view of a continuous rolling lead alloy thin plate punched. 1.1'...Punched substrate, 2...Ear portion, 3...Foot portion, 4...Vertical lattice bones, 5...Horizontal lattice bones, 6...Active material filling space portion , 7... Lead alloy thin plate, a... Length of vertical lattice bones, b... Length of horizontal lattice bones. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] 鉛または鉛合金薄板から形成された機械加工方式格子基
板の縦格子骨と横格子骨にて囲まれた活物質充填空間部
を、縦格子骨の長さく、）と横格子骨の長さくｂ）との
比がａ／ｂ≧１にて形成したことを特徴とする鉛蓄電池
用極板基板。The active material filling space surrounded by the vertical lattice bones and the horizontal lattice bones of the machined lattice substrate formed from a thin lead or lead alloy thin plate is defined by the length of the vertical lattice bones and the length of the horizontal lattice bones. 1. An electrode plate substrate for a lead-acid battery, characterized in that the ratio of a/b≧1.