JP2001202988A - Sealed lead-acid battery - Google Patents
Sealed lead-acid batteryInfo
- Publication number
- JP2001202988A JP2001202988A JP2000011430A JP2000011430A JP2001202988A JP 2001202988 A JP2001202988 A JP 2001202988A JP 2000011430 A JP2000011430 A JP 2000011430A JP 2000011430 A JP2000011430 A JP 2000011430A JP 2001202988 A JP2001202988 A JP 2001202988A
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- battery
- positive electrode
- lead
- acid 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.)
- Granted
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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Cell Electrode Carriers And Collectors (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は通信機器、UPS等
の非常時バックアップ電源等に利用されるシール形鉛蓄
電池に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed lead-acid battery used as an emergency backup power source for communication equipment, UPS and the like.
【0002】[0002]
【従来の技術】シール形鉛蓄電池の極板に用いる格子体
として従来から鋳造格子体が広く用いられていた。さら
に近年、鉛合金からなる圧延シートに複数のスリットを
入れ、このスリット部を展開伸長した、いわゆるエキス
パンド格子体が生産性の面から使用されるようになって
きている。2. Description of the Related Art Cast grids have been widely used as grids for the electrodes of sealed lead-acid batteries. Further, in recent years, a so-called expanded lattice body in which a plurality of slits are formed in a rolled sheet made of a lead alloy and the slit portions are developed and extended has been used from the viewpoint of productivity.
【0003】そして、特に高率放電におけるトリクル寿
命を向上させるために、前記したようなエキスパンド格
子体を有する正負極板を用いると共に極板表面積を大き
く確保し、かつ正負極板間の距離をより短くする構成が
検討されてきている。Particularly, in order to improve the trickle life in high-rate discharge, a positive / negative electrode plate having the above-described expanded lattice is used, a large electrode plate surface area is secured, and the distance between the positive and negative electrode plates is increased. A configuration for shortening is being studied.
【0004】前記したような鉛合金の圧延体を用いたエ
キスパンド格子体はその結晶組織が微細なラメラ状の圧
延結晶を有しているため、従来の鋳造格子体が有してい
るような粗大な鋳造組織よりも酸化腐食の形態は異なっ
ている。すなわち、圧延体の腐食は厚みが減少する方向
に均一に進行する。高温雰囲気下での寿命を考慮して格
子体合金中のSn濃度を1.0重量%程度以上に添加し
たPb−Ca−Sn系合金を用いた場合には格子網目部
の変形が抑制されるので格子網目部と活物質との密着性
は長期間にわたって維持される。一方、格子体自体はそ
の厚みを減じる方向に腐食され続ける。このような状態
の電池を高温下で高率電流で放電した場合に格子耳部が
切断し、電池の容量が急激に低下して、突然電池が寿命
に至ることがあった。[0004] Since the expanded lattice body using the rolled lead alloy as described above has a fine lamellar rolled crystal in its crystal structure, it is as coarse as the conventional cast lattice body has. The form of oxidative corrosion is different from that of a simple cast structure. That is, the corrosion of the rolled body proceeds uniformly in the direction in which the thickness decreases. In the case of using a Pb-Ca-Sn-based alloy in which the Sn concentration in the lattice alloy is added to about 1.0% by weight or more in consideration of the life in a high-temperature atmosphere, the deformation of the lattice network is suppressed. Therefore, the adhesion between the lattice network and the active material is maintained for a long time. On the other hand, the grid itself continues to be corroded in the direction of reducing its thickness. When the battery in such a state is discharged at a high rate current at a high temperature, the grid ears are cut off, the capacity of the battery is rapidly reduced, and the battery may suddenly reach the end of its life.
【0005】[0005]
【発明が解決しようとする課題】本発明は前記したよう
な従来例のエキスパンド格子体を用いたシール形鉛蓄電
池を高率放電を含むトリクル使用した時に、格子耳部が
切断することを抑制した信頼性に優れたシール形鉛蓄電
池を提供することを目的とする。SUMMARY OF THE INVENTION The present invention suppresses cutting of the grid ears when a sealed lead-acid battery using the above-described conventional expanded grid body is used in a trickle including a high-rate discharge. An object of the present invention is to provide a sealed lead-acid battery having excellent reliability.
【0006】[0006]
【課題を解決するための手段】前記した課題を解決する
ために、請求項1記載に係る発明は鉛合金からなる圧延
シートに複数のスリットを入れ、このスリット部を展開
伸長して形成した格子網目部と、これに連接された格子
耳部とを備えたエキスパンド格子体を有する正極板およ
び負極板を備えたシール形鉛蓄電池において、極板群を
構成する前記正極板と前記負極板との間の距離を1.2
mm以下とし、かつ、同極性の前記格子耳部の断面積総
和を電池の20時間率容量当たり1.9mm2 /Ah以
上とするシール形鉛蓄電池とした。According to a first aspect of the present invention, there is provided a grid formed by forming a plurality of slits in a rolled sheet made of a lead alloy and expanding and expanding the slits. In a sealed lead-acid battery having a positive electrode plate and an negative electrode plate having an expanded grid body having a mesh portion and a grid lug connected thereto, the positive electrode plate and the negative electrode plate constituting an electrode plate group Distance between 1.2
mm, and the total cross-sectional area of the grid ears having the same polarity is 1.9 mm 2 / Ah or more per 20 hour rate capacity of the battery.
【0007】また、請求項2記載に係る発明は請求項1
記載に係る発明のシール形鉛蓄電池において、正極板の
見かけ表面積の総和を電池の20時間率容量当たり、2
6.6mm2 /Ah以上とした。The invention according to claim 2 is the invention according to claim 1.
In the sealed lead-acid battery of the invention according to the above description, the sum of the apparent surface areas of the positive electrode plates is 2 per hour rate capacity of the battery.
6.6 mm 2 / Ah or more.
【0008】また、請求項3記載に係る発明は請求項1
または請求項2記載に係る発明のシール形鉛蓄電池にお
いて、正極板に用いるエキスパンド格子体は少なくとも
Snを1.0重量%以上含有するPb−Ca−Sn系合
金を用いることとした。[0008] The invention according to claim 3 is based on claim 1.
Alternatively, in the sealed lead-acid battery according to the second aspect of the present invention, the expanded lattice body used for the positive electrode plate is a Pb-Ca-Sn-based alloy containing at least 1.0% by weight of Sn.
【0009】[0009]
【発明の実施の形態】以下、本発明の実施の形態につい
て説明する。Embodiments of the present invention will be described below.
【0010】まず、Pb−Ca−Sn系合金の鋳造スラ
ブを作製した後、多段階に圧延して圧延鉛シートを作製
した。次に、この圧延鉛シートにスリットを形成した
後、スリット形成部を展開伸長して図1に示すエキスパ
ンド格子体1を作製した。この圧延鉛シートの合金組成
としてはCa含有量は0.05〜0.08重量%、Sn
含有量は0.2〜1.8重量%のものが一般に使用され
ている。このエキスパンド格子体1はスリット形成部を
展開伸長して得られた格子網目部2、この格子網目部2
に連接された上枠骨3、そしてこの上枠骨3に連接され
た耳部4から構成されている。ここで耳部4の断面積
は、その耳部4の厚み(t)とその耳部4の幅(w)と
の積として算出される。格子網目部2には活物質ペース
ト(図示せず)が充填される。この活物質ペーストは、
一般に鉛と鉛酸化物との混合粉体に耐硫酸性の合成樹脂
繊維や各種添加剤を添加し、水と希硫酸とで練合して作
製される。特に正極活物質用のペーストにおいては、化
成効率や蓄電池の初期容量特性を考慮して鉛酸化物に鉛
丹を添加した物が一般的に使用される。さらに、この鉛
丹としては一酸化鉛を焼成して鉛丹の含有量が90重量
%、他は一酸化鉛等の低級酸化物を含有した物が一般的
に使用される。First, a cast slab of a Pb-Ca-Sn-based alloy was prepared, and then rolled in multiple stages to prepare a rolled lead sheet. Next, after forming a slit in the rolled lead sheet, the slit forming portion was developed and extended to produce an expanded lattice body 1 shown in FIG. As the alloy composition of this rolled lead sheet, the Ca content is 0.05 to 0.08% by weight, Sn
Those having a content of 0.2 to 1.8% by weight are generally used. This expanded lattice body 1 has a lattice mesh part 2 obtained by developing and expanding a slit forming part,
, And an ear 4 connected to the upper frame 3. Here, the cross-sectional area of the ear 4 is calculated as the product of the thickness (t) of the ear 4 and the width (w) of the ear 4. The grid mesh part 2 is filled with an active material paste (not shown). This active material paste
Generally, it is manufactured by adding sulfuric acid-resistant synthetic resin fibers and various additives to a mixed powder of lead and lead oxide, and kneading with water and dilute sulfuric acid. Particularly, in the paste for the positive electrode active material, a material obtained by adding lead oxide to lead oxide is generally used in consideration of the formation efficiency and the initial capacity characteristics of the storage battery. Further, as the lead mica, a material containing a lower oxide such as lead monoxide is generally used by baking lead monoxide and having a content of 90% by weight of the lead mica.
【0011】活物質ペーストが充填されたエキスパンド
格子体1は、表面をパルプ繊維を主体とするペースト紙
が張り付けられ、所定の寸法に切断された後に40〜8
5℃程度の温度で乾燥され、未化成の正極板5と負極板
6が作製される。これらの極板はガラスマットのセパレ
ータ7と共に組み合わされ、同一極性の極板が複数枚あ
る場合には図2に示したように同一極性の耳部4を集合
溶接して棚部8を形成し、棚部8に端子取り出し部9を
構成する。本発明のシール形鉛蓄電池は極性の異なる正
極板5と負極板6と間の距離Gを1.2mm以下とし、
かつ同一極性極板の耳部4の断面積(t×w)の総和を
シール形鉛蓄電池の20時間率容量当たり1.9mm2
/Ah以上とする。このような構成であれば高率放電を
含む高温トリクル使用における耳部の断線を抑制するこ
とができる。The expanded lattice body 1 filled with the active material paste has a surface to which a paste paper mainly composed of pulp fibers is stuck and cut to a predetermined size.
Drying is performed at a temperature of about 5 ° C. to produce an unformed positive electrode plate 5 and a negative electrode plate 6. These electrode plates are combined with a glass mat separator 7, and when there are a plurality of electrode plates of the same polarity, the lugs 4 of the same polarity are collectively welded to form a shelf 8 as shown in FIG. , A terminal take-out unit 9 is formed on the shelf 8. In the sealed lead-acid battery of the present invention, the distance G between the positive electrode plate 5 and the negative electrode plate 6 having different polarities is 1.2 mm or less,
In addition, the sum of the cross-sectional areas (t × w) of the ears 4 of the same polarity electrode plate is 1.9 mm 2 per 20 hour rate capacity of the sealed lead-acid battery.
/ Ah or more. With such a configuration, it is possible to suppress disconnection of the ear portion when a high-temperature trickle including a high-rate discharge is used.
【0012】なお、断面積の総和は極板1枚当たりの耳
部の断面積に同一極性極板の枚数を乗じたものになる。
図2の例では正極板5が4枚、負極板6が5枚で極板群
が構成されているので、正極については正極の耳部4の
断面積に4を乗じた値となる。同じく負極については負
極の耳部4の断面積に5を乗じた値となる。また、上記
の構成は特にセル内の正極板の見かけ表面積の和{極板
面の高さ×幅×2(表裏2面)}が電池の20時間率容
量当たり26.6mm2 /Ahを超えた場合に適用する
ことが好ましい。電池容量当たりの極板面積が上記の値
を超えて大きくなると電池の内部抵抗はさらに低下し、
高率放電での持続時間が長くなり、耳部が断線する確率
が高くなるためである。The sum of the cross-sectional areas is obtained by multiplying the cross-sectional area of the lug per electrode plate by the number of the same-polarity electrode plates.
In the example of FIG. 2, four positive electrode plates 5 and five negative electrode plates 6 constitute an electrode plate group. Therefore, the positive electrode has a value obtained by multiplying the cross-sectional area of the lug 4 of the positive electrode by 4. Similarly, for the negative electrode, the value is obtained by multiplying 5 by the cross-sectional area of the ear part 4 of the negative electrode. In addition, in the above configuration, in particular, the sum of the apparent surface areas of the positive electrode plates in the cell {height of the electrode plate surface × width × 2 (front and back surfaces)} exceeds 26.6 mm 2 / Ah per 20 hour rate capacity of the battery. It is preferable to apply this case. When the electrode plate area per battery capacity is larger than the above value, the internal resistance of the battery further decreases,
This is because the duration of the high-rate discharge increases, and the probability of disconnection of the ears increases.
【0013】また正極格子体に用いる圧延鉛シートのS
nの含有量が1.0重量%を超える場合、酸化腐食によ
る格子体の変形・伸びは抑制され、長期にわたって格子
体と活物質間の密着性を良好に維持できる。電池寿命の
観点からはこのような作用は好ましいものであるが、反
面、電池を長期間使用した後に腐食によって耳部の断面
積が減少した状態でも電池は高率の放電電流で長時間放
電することが可能であることから、耳部が断線する可能
性が高い。このような場合には前記したような本発明の
構成を適用することが特に好ましい。The rolled lead sheet used for the positive electrode grid body has
When the content of n exceeds 1.0% by weight, deformation and elongation of the lattice body due to oxidation corrosion are suppressed, and good adhesion between the lattice body and the active material can be maintained for a long time. From the viewpoint of battery life, such an action is preferable, but on the other hand, even after the battery has been used for a long period of time, the battery discharges for a long time at a high discharge current even in a state where the cross-sectional area of the ear part is reduced by corrosion. Since it is possible, the ears are likely to be disconnected. In such a case, it is particularly preferable to apply the configuration of the present invention as described above.
【0014】[0014]
【実施例】本発明の構成および比較例のシール形鉛蓄電
池についてトリクル寿命特性の評価を行い、本発明の効
果を明らかにした。以下にその内容を記載する。EXAMPLES The structure of the present invention and the trickle life characteristics of the sealed lead-acid battery of the comparative example were evaluated, and the effect of the present invention was clarified. The details are described below.
【0015】(実施例1)まず、本発明例および比較例
によるシール形鉛蓄電池は公称電圧12V、20時間率
定格容量7Ahである。本発明例および比較例によるシ
ール形鉛蓄電池は正極板が4枚、負極板が5枚で構成さ
れている。それぞれの極板寸法は正極板が高さ69m
m,幅45mm,厚み2.90mm、負極板が高さ70
mm,幅45mm,厚み1.90mmである。これらの
極板に用いる格子体はすべてPb−Ca−Sn系合金の
圧延鉛シートをエキスパンド加工して得られたエキスパ
ンド格子体を用いた。実施例1で用いた圧延鉛シートの
厚みは正極で1.1mm、負極で0.7mmとした。こ
れらの厚みはそれぞれ正極の耳部4の厚みと負極の耳部
4の厚みに対応する。なお、これらの正極板および負極
板の活物質充填量は極板群当たり正極で100g、負極
で110gである。上記の場合は正極板の見かけ表面積
は一枚当たり表裏両面で62.1cm2 、極板群では2
48.4cm2 であり、20時間率容量当たりでは3
5.5cm2 /Ahに相当する。ここで負極板の耳部4
の幅寸法を5mm(負極板の耳部断面積の総和を17.
5mm2 )とし、20時間率容量当たりの負極板耳部断
面積の総和は2.5mm2 /Ahの一定とし、正極板の
耳部断面積と正極板と負極板との間の距離を変化させて
表1に示す電池を作製した。また正極格子合金としては
Pb−0.06重量%Ca−1.0重量%Sn合金、負
極格子合金としてPb−0.06重量%Ca−0.25
重量%Sn合金を用いた。(Embodiment 1) First, the sealed lead-acid batteries according to the present invention and comparative examples have a nominal voltage of 12 V and a rated capacity of 20 hours at 7 Ah. The sealed lead-acid batteries according to the examples of the present invention and the comparative examples each include four positive plates and five negative plates. The size of each electrode plate is 69 m in height for the positive electrode plate
m, width 45mm, thickness 2.90mm, negative electrode plate height 70
mm, width 45 mm, thickness 1.90 mm. The grids used for these electrode plates were all expanded grids obtained by expanding a rolled lead sheet of a Pb-Ca-Sn-based alloy. The thickness of the rolled lead sheet used in Example 1 was 1.1 mm for the positive electrode and 0.7 mm for the negative electrode. These thicknesses correspond to the thickness of the ear 4 of the positive electrode and the thickness of the ear 4 of the negative electrode, respectively. The positive electrode plate and the negative electrode plate had an active material filling amount of 100 g for the positive electrode and 110 g for the negative electrode per electrode plate group. In the above case, the apparent surface area of the positive electrode plate is 62.1 cm 2 on both sides, and 2 in the electrode plate group.
48.4 cm 2 , 3 per 20 hour rate capacity
It corresponds to 5.5 cm 2 / Ah. Here, the ear 4 of the negative electrode plate
Is 5 mm (total sum of the sectional areas of the ears of the negative electrode plate is 17 mm).
5 mm 2 ), and the total sum of the cross-sectional areas of the negative electrode plate ears per 20 hour rate capacity is fixed at 2.5 mm 2 / Ah, and the distance between the positive electrode plate ear cross-sectional area and the distance between the positive electrode plate and the negative electrode plate is changed. Thus, a battery shown in Table 1 was produced. Pb-0.06% by weight Ca-1.0% by weight Sn alloy as a positive electrode grid alloy, and Pb-0.06% by weight Ca-0.25% as a negative electrode grid alloy
A weight percent Sn alloy was used.
【0016】[0016]
【表1】 [Table 1]
【0017】次に表1に示した電池A〜電池Iについて
20時間率容量当りの正極板見かけ表面積の総和を変更
した電池を作製した。具体的には電池A〜電池Iの極板
構成枚数である正極板4枚、負極板5枚の構成から正極
板3枚、負極板4枚もしくは正極板2枚、負極板3枚の
構成とした。ただし、極板群内に含まれる活物質量は表
1に示した電池と同じ正極100g、負極110gとし
た。これらの電池の構成を表2に示す。Next, the batteries A to I shown in Table 1 were prepared by changing the sum of the apparent surface areas of the positive electrode plates per 20 hour rate capacity. Specifically, from the configuration of four positive electrode plates and five negative electrode plates, which are the number of electrode plates of Battery A to Battery I, the configuration of three positive electrode plates, four negative electrode plates or two positive electrode plates, and three negative electrode plates did. However, the amount of the active material contained in the electrode plate group was 100 g for the positive electrode and 110 g for the negative electrode, which were the same as the batteries shown in Table 1. Table 2 shows the configurations of these batteries.
【0018】[0018]
【表2】 [Table 2]
【0019】表1および表2に示した電池A〜電池Uに
ついて、以下に示す評価方法でトリクル寿命特性の評価
を行った。For the batteries A to U shown in Tables 1 and 2, the trickle life characteristics were evaluated by the following evaluation method.
【0020】試験条件は以下の通りである。 <トリクル寿命試験> (1).充電状態にある試験電池について、25℃にお
いて35A放電で終止電圧9.6Vまで放電し、初期容
量を算出する。 (2).60±2℃雰囲気下において13.8V定電圧
充電を3週間行う。 (3).(1)の条件にて容量確認を行う。 (4).(2)と(3)の充放電サイクルを行い、放電
容量が初期容量の1/2以下になるまで繰り返し行う。
この時の充電期間をトリクル寿命とする。また、試験終
了後の電池を分解調査し、正極耳部の状態の確認を行っ
た。これらの結果を表3に示す。The test conditions are as follows. <Trickle life test> (1). The test battery in a charged state is discharged at a discharge of 35 A at 25 ° C. to a final voltage of 9.6 V, and the initial capacity is calculated. (2). The battery is charged at a constant voltage of 13.8 V in an atmosphere of 60 ± 2 ° C. for 3 weeks. (3). Confirm the capacity under the condition of (1). (4). The charge / discharge cycle of (2) and (3) is performed, and the cycle is repeated until the discharge capacity becomes 1/2 or less of the initial capacity.
The charging period at this time is defined as a trickle life. Further, the battery after the test was disassembled and inspected, and the state of the positive electrode lug was confirmed. Table 3 shows the results.
【0021】[0021]
【表3】 [Table 3]
【0022】表3の結果から明らかなように、本発明の
構成によれば高率放電を含むトリクル使用において正極
耳の厚みが著しく減少したり、もしくは正極耳が切断す
るといった現象を抑制し、長期間にわたって正極耳の状
態を正常に維持できることが確認できる。また正極板と
負極板間の距離が1.2mmの電池NとOについては2
0時間率容量当たりの正極板耳部断面積の総和が1.9
mm2 /Ahの電池Nに比較して電池Oは1.6mm2
/Ahに低下したことにより、正極耳の腐食の程度は急
激に悪化していた。その悪化に応じて寿命低下も著しい
ものであった。一方、電池容量当たりの耳部断面積の総
和は2.2mm2 /Ahから1.9mm 2 /Ahへの低
下では殆ど寿命低下に影響を及ぼすことはなかった。そ
して断面積と腐食との関係を考察するに、断面積が低下
することによって、高率放電時に流れる電流密度は増加
する。さらに断面積低下によって耳部の体積は減少して
いることから、放電電流に基づいて発生するジュール熱
による温度上昇は激しくなり耳部の温度が上昇して腐食
反応が加速されていることが推測される。特に本発明の
シール形鉛蓄電池のように耳部が電解液から露出して電
解液によって耳部の熱が放熱されにくい構造の場合に、
このような現象が顕著になると推測される。As is clear from the results in Table 3, the present invention
According to the configuration, the positive electrode is used in trickle using high-rate discharge.
The thickness of the ears is significantly reduced or the positive ears are cut
Over the long term,
It can be confirmed that the state can be maintained normally. Also, with the positive electrode plate
2 for batteries N and O whose distance between the anode plates is 1.2 mm
The sum total of the positive electrode plate ear cross-sectional areas per 0 hour rate capacity is 1.9.
mmTwo/ Ah battery O is 1.6 mm compared to battery NTwo
/ Ah, the degree of corrosion of the positive electrode ears is
It was getting very bad. The life is remarkably reduced according to the deterioration
Was something. On the other hand, the total ear cross-sectional area per battery capacity
The sum is 2.2mmTwo1.9mm from / Ah TwoLow to / Ah
Under the conditions, there was almost no influence on the life reduction. So
To consider the relationship between cross-sectional area and corrosion.
Current density during high-rate discharge increases
I do. Furthermore, the volume of the ear part decreases due to the reduction of the cross-sectional area.
Joule heat generated based on the discharge current
Temperature rise is severe, the temperature of the ears rises and corrodes
It is assumed that the reaction was accelerated. Especially of the present invention
As with sealed lead-acid batteries, the ears are exposed
In the case of a structure in which heat from the ears is difficult to dissipate due to liquid dissolution,
It is presumed that such a phenomenon becomes significant.
【0023】(実施例2)次に実施例1で行った確認実
験において正極格子体合金中のSn含有量について検討
を行った。表1に示した電池D,E,Fについてそれぞ
れ正極格子体合金をPb−0.06重量%Ca−0.6
重量%Snとした表4に示す電池V,W,Xを作製し
た。(Example 2) Next, in a confirmation experiment performed in Example 1, the Sn content in the positive electrode lattice alloy was examined. For each of the batteries D, E, and F shown in Table 1, the positive electrode grid alloy was Pb-0.06% by weight Ca-0.6.
Batteries V, W, and X shown in Table 4 were prepared in which the percentage by weight was Sn.
【0024】[0024]
【表4】 [Table 4]
【0025】表4に示した電池V,W,Xについて実施
例1で行ったトリクル寿命試験を行った。またこの寿命
試験が終了した電池についても実施例1で行ったと同じ
分解調査をし、正極耳部の状態の確認を行った。これら
の結果を表5に示す。The trickle life test performed in Example 1 was performed on the batteries V, W, and X shown in Table 4. In addition, the same disassembly and investigation as in Example 1 was performed on the battery that had completed the life test, and the state of the positive electrode lug was confirmed. Table 5 shows the results.
【0026】[0026]
【表5】 [Table 5]
【0027】表5に示した電池V,W,Xおよび表3に
示した電池D,E,Fの試験結果から正極格子体合金中
のSnの濃度が0.6重量%まで低下した場合には電池
のトリクル寿命が著しく低下していることがわかる。ま
た、正極耳部の状態は電池D,E,Fに比較して良好で
あった。また電池V,W,Xの正極格子体は上下方向へ
の伸びが著しく、正極活物質は正極格子体から浮き上が
った状態に至っていた。これらの結果から正極格子体合
金中のSnの濃度を低下させた場合、正極耳部に異常が
発生する以前に電池が寿命に至ると考えられる。よって
本発明の課題である正極耳部での異常を抑制することは
できるものの、電池寿命自体が低下するので最も好まし
いとは云えない。これに対して請求項3による本発明の
構成によれば長い電池寿命と正極耳部での異常抑制とを
両立して得ることができる。From the test results of the batteries V, W, X shown in Table 5 and the batteries D, E, F shown in Table 3, when the concentration of Sn in the positive electrode grid alloy was reduced to 0.6% by weight. Indicates that the trickle life of the battery is significantly reduced. The condition of the positive electrode lug was better than that of the batteries D, E, and F. In addition, the positive electrode lattices of the batteries V, W, and X extended remarkably in the vertical direction, and the positive electrode active material was in a state of being lifted from the positive electrode lattice. From these results, when the concentration of Sn in the positive electrode lattice alloy is reduced, it is considered that the battery reaches its life before an abnormality occurs in the positive electrode lug. Therefore, although it is possible to suppress the abnormality at the positive electrode lug, which is the subject of the present invention, it is not the most preferable because the battery life itself is shortened. On the other hand, according to the configuration of the present invention according to claim 3, it is possible to obtain both long battery life and suppression of abnormalities at the positive electrode lug.
【0028】また本実施例においては通常のPb−Ca
−Sn合金の圧延シートを用いた例について記載した
が、過放電回復性を考慮して圧延シート表面上に圧延シ
ートよりも高濃度のSnを含有するPb−Sn合金層を
圧着等により形成した場合においても同様の結果が得ら
れる。In the present embodiment, ordinary Pb-Ca
Although an example using a rolled sheet of a -Sn alloy was described, a Pb-Sn alloy layer containing Sn at a higher concentration than the rolled sheet was formed on the rolled sheet surface by pressing or the like in consideration of overdischarge recoverability. A similar result is obtained in this case.
【0029】[0029]
【発明の効果】以上の説明から判るように、本発明の構
成によれば、エキスパンド格子体を備えたシール形鉛蓄
電池において、高率放電のトリクル寿命特性を確保する
と共に正極耳部の異常発生を抑制して信頼性に優れたシ
ール形鉛蓄電池が得られ、その効果は高い。As can be seen from the above description, according to the structure of the present invention, in the sealed lead-acid battery provided with the expanded grid, the trickle life characteristic of high rate discharge is ensured and the occurrence of abnormalities in the positive electrode lug is ensured. And a highly reliable sealed lead storage battery is obtained, and the effect is high.
【図1】エキスパンド格子体を示す一部平面図FIG. 1 is a partial plan view showing an expanded lattice body.
【図2】(a)極板群の側面図 (b)同平面図FIG. 2A is a side view of an electrode group; FIG.
1 エキスパンド格子体 2 格子網目部 3 上枠骨 4 耳部 5 正極板 6 負極板 7 セパレータ 8 棚部 9 端子取り出し部 G 距離 w 幅 DESCRIPTION OF SYMBOLS 1 Expanded lattice body 2 Grid mesh part 3 Upper frame bone 4 Ear part 5 Positive electrode plate 6 Negative electrode plate 7 Separator 8 Shelf 9 Terminal take-out part G Distance w Width
Claims (3)
ットを入れ、このスリット部を展開伸長して形成した格
子網目部と、これに連接された格子耳部とを備えたエキ
スパンド格子体を有する正極板および負極板を備えたシ
ール形鉛蓄電池において、極板群を構成する前記正極板
と前記負極板との間の距離を1.2mm以下とし、かつ
同極性の前記格子耳部の断面積総和を電池の20時間率
容量当たり1.9mm2 /Ah以上としたことを特徴と
するシール形鉛蓄電池。A rolled sheet made of a lead alloy is provided with a plurality of slits, and an expanded grid body having a grid mesh formed by expanding and expanding the slits and a grid lug connected to the grid mesh. In a sealed lead-acid battery provided with a positive electrode plate and a negative electrode plate, a distance between the positive electrode plate and the negative electrode plate constituting an electrode plate group is set to 1.2 mm or less, and a cross-sectional area of the grid ears having the same polarity. A sealed lead-acid battery having a total sum of not less than 1.9 mm 2 / Ah per 20 hour capacity of the battery.
率容量当たり、26.6mm2 /Ah以上としたことを
特徴とする請求項1に記載のシール形鉛蓄電池。2. The sealed lead-acid battery according to claim 1, wherein the apparent surface area of the positive electrode plate is at least 26.6 mm 2 / Ah per 20 hour capacity of the battery.
なくともSnを1.0重量%以上含有するPb−Ca−
Sn系合金としたことを特徴とする請求項1または2に
記載のシール形鉛蓄電池。3. An expanded lattice body used for a positive electrode plate contains Pb—Ca— containing at least 1.0% by weight of Sn.
3. The sealed lead-acid battery according to claim 1, wherein the lead-acid battery is a Sn-based alloy.
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JP2000011430A JP4292666B2 (en) | 2000-01-20 | 2000-01-20 | Sealed lead acid battery |
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Cited By (5)
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JP2006179378A (en) * | 2004-12-24 | 2006-07-06 | Furukawa Battery Co Ltd:The | Backup sealed lead-acid battery for automobile |
WO2012064028A3 (en) * | 2010-11-08 | 2012-09-20 | 세방전지(주) | Automobile battery and method for manufacturing pole plates |
JP2013114870A (en) * | 2011-11-28 | 2013-06-10 | Gs Yuasa Corp | Positive electrode plate for lead acid battery, and lead acid battery using the same |
JP2019207786A (en) * | 2018-05-29 | 2019-12-05 | 古河電池株式会社 | Lead acid battery |
CN114256515A (en) * | 2021-11-02 | 2022-03-29 | 浙江长兴绿色电池科技有限公司 | Research method for dynamic charge acceptance of exhaust type start-stop lead-acid storage battery |
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2000
- 2000-01-20 JP JP2000011430A patent/JP4292666B2/en not_active Expired - Fee Related
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006179378A (en) * | 2004-12-24 | 2006-07-06 | Furukawa Battery Co Ltd:The | Backup sealed lead-acid battery for automobile |
WO2012064028A3 (en) * | 2010-11-08 | 2012-09-20 | 세방전지(주) | Automobile battery and method for manufacturing pole plates |
KR101252631B1 (en) * | 2010-11-08 | 2013-04-09 | 세방전지(주) | A battery for automobile and plate manufacturing method thereof |
CN103181019A (en) * | 2010-11-08 | 2013-06-26 | 世邦电池株式会社 | Automobile battery and method for manufacturing pole plates |
US9225041B2 (en) | 2010-11-08 | 2015-12-29 | Global Battery Co., Ltd. | Automobile battery and method for manufacturing pole plates |
JP2013114870A (en) * | 2011-11-28 | 2013-06-10 | Gs Yuasa Corp | Positive electrode plate for lead acid battery, and lead acid battery using the same |
JP2019207786A (en) * | 2018-05-29 | 2019-12-05 | 古河電池株式会社 | Lead acid battery |
CN114256515A (en) * | 2021-11-02 | 2022-03-29 | 浙江长兴绿色电池科技有限公司 | Research method for dynamic charge acceptance of exhaust type start-stop lead-acid storage battery |
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