JPH08106917A - Cylindrical sealed alkaline storage battery - Google Patents
Cylindrical sealed alkaline storage batteryInfo
- Publication number
- JPH08106917A JPH08106917A JP6241232A JP24123294A JPH08106917A JP H08106917 A JPH08106917 A JP H08106917A JP 6241232 A JP6241232 A JP 6241232A JP 24123294 A JP24123294 A JP 24123294A JP H08106917 A JPH08106917 A JP H08106917A
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- negative electrode
- battery
- burr
- group
- 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
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- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は円筒密閉型アルカリ蓄電
池の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved cylindrical sealed alkaline storage battery.
【０００２】[0002]
【従来の技術】各種電源として用いられる蓄電池にはよ
く知られているように、鉛蓄電池とアルカリ蓄電池があ
る。アルカリ蓄電池の代表的な系はニッケル−カドミウ
ム蓄電池であり、その他にニッケル−水素蓄電池が普及
してきた。2. Description of the Related Art As is well known, storage batteries used as various power sources include lead storage batteries and alkaline storage batteries. A typical system of alkaline storage batteries is a nickel-cadmium storage battery, and other nickel-hydrogen storage batteries have become popular.
【０００３】これらはその取扱いの簡便さから密閉型が
広く使われており、また、このようなニッケル電極を正
極とするアルカリ蓄電池は、帯状の正極板、負極板およ
びセパレータを渦巻状に巻回した極板群を電池缶に収容
して電池を構成している。The sealed type is widely used because it is easy to handle, and in an alkaline storage battery having such a nickel electrode as a positive electrode, a strip-shaped positive electrode plate, a negative electrode plate and a separator are spirally wound. The electrode plate group is housed in a battery can to form a battery.
【０００４】電極の製法としては、焼結式、発泡式、ペ
ースト式などがあるが、スクリーン、エキスパンドメタ
ル、パンチングメタルなどの多孔性の芯材に活物質ペー
ストを塗着する方式が生産性や価格の点で有利である。The electrodes can be manufactured by a sintering method, a foaming method, a paste method, or the like. The method of applying the active material paste to a porous core material such as a screen, an expanded metal, or a punching metal can improve productivity. It is advantageous in terms of price.
【０００５】また、端子の取り出し法としては、一般に
タブを用いない場合は別にして、正極板は封口蓋に正極
リード板を溶接により取り付け、負極は同じくリード板
を電池缶内底面に溶接により取り付けている。しかしな
がら、電池が小型化し、さらに細形化してくると、負極
のリードは電池内に溶接のための電極を挿入する必要が
あることから溶接が困難であり、例えば、特願平５−１
１０３５３号において提案したように、負極板の最外周
部を電池缶内壁に接触させることで電池缶を負極外部端
子とするようにした。In addition, as a method of taking out the terminal, generally, except when a tab is not used, the positive electrode plate is attached to the sealing lid by welding the positive electrode lead plate, and the negative electrode is also welded to the lead plate inside the battery can. It is attached. However, as the battery becomes smaller and more compact, it is difficult to weld the negative electrode lead because an electrode for welding needs to be inserted into the battery. For example, Japanese Patent Application No. 5-1
As proposed in No. 10353, the outermost peripheral portion of the negative electrode plate was brought into contact with the inner wall of the battery can so that the battery can served as the negative electrode external terminal.
【０００６】[0006]
【発明が解決しようとする課題】ところが、このような
負極板の最外周面を電池缶内壁に接触させることで電池
缶を負極端子とした場合、急速充電や放電においては、
負極板と電池缶の間の接触抵抗が大きいため、電圧低下
の原因の一つになっている。そこで接触抵抗を減少させ
るために、この部分の導電性の向上をねらって種々の方
策が検討されたが、工程が複雑であったり、コストアッ
プになるなど充分な解決策は見出されていない。However, when the battery can is used as a negative electrode terminal by bringing the outermost peripheral surface of such a negative electrode plate into contact with the inner wall of the battery can, in rapid charging or discharging,
Since the contact resistance between the negative electrode plate and the battery can is large, it is one of the causes of the voltage drop. Therefore, in order to reduce the contact resistance, various measures have been studied with the aim of improving the conductivity of this part, but no sufficient solution has been found such as the process being complicated or the cost increasing. .
【０００７】本発明は、上記のような課題を解決し、電
池缶を負極端子とした電池の内部抵抗を小さくし信頼性
の高い電池を提供することを目的とする。An object of the present invention is to solve the above problems and to provide a highly reliable battery in which the battery can is used as a negative electrode terminal to reduce the internal resistance of the battery.
【０００８】[0008]
【課題を解決するための手段】本発明の円筒密閉型アル
カリ蓄電池は、前記目的を達成するべく、帯状の正極板
および負極板をセパレータを介して巻回した極板群を電
池缶に収納してなる円筒密閉型アルカリ蓄電池におい
て、前記負極板はその短尺方向の切断面に生じた負極板
のバリまたはかえりが、前記極板群の巻終わりの部分で
は、前記極板群の中心方向とは反対の外側を向くように
巻回され、前記バリまたはかえりの箇所で前記電池缶と
接触していることを特徴とする。In order to achieve the above-mentioned object, a cylindrical sealed alkaline storage battery of the present invention has a battery can in which an electrode plate group in which a strip-shaped positive electrode plate and a negative electrode plate are wound via a separator is housed. In the cylindrical sealed alkaline storage battery consisting of, the negative electrode plate has a burr or burr of the negative electrode plate formed on the cut surface in the short-side direction, at the end of winding of the electrode plate group, with the center direction of the electrode plate group. It is characterized in that it is wound so as to face the opposite outside and is in contact with the battery can at the location of the burr or burr.
【０００９】また、この場合、前記負極板はその短尺方
向の切断面に生じた負極板のバリまたはかえりが、前記
極板群の巻始めの部分では、前記極板群の中心方向を向
くように巻回されていることが好ましい。Further, in this case, the burr or the burr of the negative electrode plate formed on the cut surface in the short direction of the negative electrode plate faces the center direction of the electrode plate group at the winding start portion of the electrode plate group. It is preferably wound around.
【００１０】[0010]
【作用】上記構成によれば、負極板の最外周面と電池缶
の内壁との接触は活物質層だけでなく、バリやかえり、
つまり芯材金属の端部においてもなされるので負極板と
電池缶の間の接触抵抗が低減される。このため、充放電
における電圧低下を抑えると共に集電効率に優れ、性能
的に良好な円筒密閉型アルカリ蓄電池を提供することが
可能となる。さらには、極板群の巻き始めの負極板のバ
リやかえりを極板群の中心方向を向くように巻回するこ
とにより内部短絡による不良の削減も可能となる。According to the above structure, contact between the outermost peripheral surface of the negative electrode plate and the inner wall of the battery can is caused not only by the active material layer but also by burrs and burr.
That is, the contact resistance between the negative electrode plate and the battery can is reduced because it is also performed at the end of the core metal. Therefore, it is possible to provide a cylindrical sealed alkaline storage battery that suppresses the voltage drop during charge and discharge, has excellent current collection efficiency, and has good performance. Furthermore, by winding the burr and burrs of the negative electrode plate at the beginning of winding of the electrode plate group so as to face the center direction of the electrode plate group, it is possible to reduce defects due to internal short circuits.
【００１１】[0011]
【実施例】以下本発明の実施例について説明する。EXAMPLES Examples of the present invention will be described below.
【００１２】正極板は、水酸化ニッケル粉末をポリビニ
ルアルコール（ＰＶＡ）水溶液で混合撹拌により調整し
た水酸化ニッケルペースト中に三次元構造を有する多孔
度９０〜９５％からなる発泡メタル芯体を浸漬すること
により活物質を充填して作成した。負極板は酸化カドミ
ウム粉末１００重量部をエチレングリコール２５重量部
で混合撹拌により調整したカドミウムペーストをニッケ
ルメッキを施した開孔率５０％のパンチング鋼板からな
る芯体上に塗着して作成した。For the positive electrode plate, a foam metal core having a three-dimensional structure and a porosity of 90 to 95% is immersed in a nickel hydroxide paste prepared by mixing nickel hydroxide powder with an aqueous solution of polyvinyl alcohol (PVA) and stirring. It was prepared by filling the active material. The negative electrode plate was prepared by coating 100 parts by weight of cadmium oxide powder with 25 parts by weight of ethylene glycol by mixing and stirring and coating a cadmium paste on a core body made of a nickel-plated punched steel sheet having a porosity of 50%.
【００１３】このように作成した大寸法の正負極板を電
池用の単位極板に切断した。この時、正極板の切断面に
はバリまたはかえりの発生はほとんど見られなかった。The large-sized positive and negative electrode plates thus prepared were cut into unit electrode plates for batteries. At this time, almost no burrs or burrs were observed on the cut surface of the positive electrode plate.
【００１４】次に図１に示すように前記のようにして得
られた帯状正極板１と帯状負極板２をナイロン不織布か
らなるセパレータ３を介して渦巻状に巻回して極板群を
作製し、極板群の巻終わりの負極板２のバリまたはかえ
り４が電池缶５の内壁に接触するように電池缶５に収容
した。ついで、水酸化カリウムを主体とした電解液を電
池缶５内に注入し、封口板で封口することにより、本発
明の実施例によるＡＡサイズの円筒密閉型ニッケル−カ
ドミウム蓄電池Ａを得た。なお、図中６は負極板２の芯
材を示す。Next, as shown in FIG. 1, the strip-shaped positive electrode plate 1 and the strip-shaped negative electrode plate 2 obtained as described above are spirally wound with a separator 3 made of a nylon non-woven fabric interposed therebetween to prepare an electrode plate group. The burr or burr 4 of the negative electrode plate 2 at the end of winding of the electrode plate group was housed in the battery can 5 so as to contact the inner wall of the battery can 5. Then, an electrolytic solution containing potassium hydroxide as a main component was poured into the battery can 5 and sealed with a sealing plate to obtain an AA size cylindrical sealed nickel-cadmium storage battery A according to an example of the present invention. In addition, 6 in the figure shows the core material of the negative electrode plate 2.
【００１５】次に、実施例蓄電池Ａと同様にして極板を
作製し、大寸法の負極板７からは図２のように固定切断
刃８に対して可動切断刃９を矢印の如く上下動させ、大
寸法の負極板７を上下から交互に切断することにより単
位極板としての負極板２を切断した。このとき出来上が
った単位極板としての負極板２の切断面に生じたバリま
たはかえり４は、互いに向かい合った切断面で逆向きに
なる。このようにして得られた極板を用いて実施例蓄電
池Ａと同様にして電池を作製し本発明の実施例による円
筒密閉型ニッケル−カドミウム蓄電池Ｂを得た。なお、
このときの負極板２の短尺方向の切断面に生じたバリま
たはかえり４の向きは、極板群巻き始め部分では極板群
の中心方向、巻終わり部分では極板群の中心方向と反対
の外側をそれぞれ向いている。Next, an electrode plate was prepared in the same manner as the storage battery A of Example, and the movable cutting blade 9 was moved up and down with respect to the fixed cutting blade 8 from the large size negative electrode plate 7 as shown in FIG. Then, the negative electrode plate 2 as a unit electrode plate was cut by alternately cutting the large-sized negative electrode plate 7 from above and below. At this time, the burrs or burrs 4 formed on the cut surface of the negative electrode plate 2 as a unit electrode plate thus completed are opposite in the cut surfaces facing each other. Using the electrode plate thus obtained, a battery was produced in the same manner as in Example storage battery A to obtain a cylindrical sealed nickel-cadmium storage battery B according to an example of the present invention. In addition,
At this time, the direction of the burr or burr 4 generated on the cut surface of the negative electrode plate 2 in the short direction is opposite to the central direction of the electrode plate group at the winding start portion and the central direction of the electrode plate group at the winding end portion. Facing outwards.
【００１６】次に、上記実施例蓄電池Ａと同様にして負
極板を作成し、正極板と組み合わせてセパレータを介し
て巻回するとき、バリまたはかえりの方向を規定しない
で極板群を構成し、このような極板群を用いてニッケル
−カドミウム蓄電池を作製し、従来例による蓄電池Ｃを
得た。Next, when a negative electrode plate is prepared in the same manner as in the storage battery A of the above embodiment and is wound with a separator combined with the positive electrode plate, the electrode plate group is formed without defining the direction of burr or burr. A nickel-cadmium storage battery was manufactured using such an electrode plate group, and a storage battery C according to a conventional example was obtained.
【００１７】実施例の蓄電池Ａ、Ｂおよび従来例の蓄電
池Ｃを各々５０００セルずつ試作し、全ての電池につい
て内部抵抗と短絡不良の有無を確認した。その時の内部
抵抗の平均値と標準偏差σ及び短絡不良率について下記
表１に示す。The storage batteries A and B of the example and the storage battery C of the conventional example were made as prototypes of 5000 cells each, and the internal resistance and the presence or absence of short circuit defects were confirmed for all the batteries. Table 1 below shows the average value, standard deviation σ, and short-circuit defect rate of the internal resistance at that time.
【００１８】[0018]
【表１】 [Table 1]
【００１９】電池の評価試験は２０℃において充電電流
６００ｍＡ、充電時間１．５時間、放電電流１２０ｍ
Ａ、６００ｍＡ、１２００ｍＡ、１８００ｍＡ、３００
０ｍＡ、放電終止電圧１．０Ｖの条件下でそれぞれ充放
電試験を行った。このときの各々の放電電流値に対する
放電電気量を図３に示す。A battery evaluation test was carried out at 20 ° C. with a charging current of 600 mA, a charging time of 1.5 hours, and a discharge current of 120 m.
A, 600 mA, 1200 mA, 1800 mA, 300
A charge / discharge test was performed under the conditions of 0 mA and a discharge end voltage of 1.0 V. FIG. 3 shows the amount of discharged electricity for each discharge current value at this time.
【００２０】この表１と図３より明らかなように、負極
板の短尺方向の切断面に生じたバリまたはかえりが極板
群の巻終わりの部分では極板群の中心方向とは反対の外
側を向くように巻回し、この負極板の巻終わりのバリま
たはかえりを電池缶内壁と接触させることにより、接触
抵抗が低減し性能的に良好な結果が得られる。同時に、
極板群の巻終わり部での短絡不良率が減少し、信頼性の
高い円筒密閉型電池を得ることができる。また、負極板
の巻き始め部でのバリまたはかえりの方向を前記極板群
の中心方向側に規定することにより短絡不良率をさらに
低減することができる。As is clear from Table 1 and FIG. 3, burrs or burrs formed on the cut surface of the negative electrode plate in the short-side direction are located on the outer side opposite to the center direction of the electrode group at the end of winding of the electrode group. The contact resistance is reduced and good results are obtained by contacting the burr or burr at the end of winding of the negative electrode plate with the inner wall of the battery can. at the same time,
The short-circuit failure rate at the winding end of the electrode plate group is reduced, and a highly reliable cylindrical sealed battery can be obtained. Further, by defining the direction of burr or burr at the winding start portion of the negative electrode plate toward the center side of the electrode plate group, the short circuit failure rate can be further reduced.
【００２１】[0021]
【発明の効果】以上のように、帯状の正極板および負極
板をセパレータを介して巻回した極板群を電池缶に収納
してなる円筒密閉型アルカリ蓄電池において、前記負極
板をその短尺方向の切断面に生じた負極板のバリまたは
かえりが、前記極板群の巻終わりの部分では、前記極板
群の中心方向とは反対の外側を向くように巻回し、前記
バリまたはかえりの箇所で前記電池缶と接触させること
により、電池の内部抵抗が低減し、放電時の電圧低下を
抑えると共に短絡不良率が低く、信頼性の高い円筒密閉
型アルカリ蓄電池を提供することができる。As described above, in the cylindrical sealed alkaline storage battery in which the electrode plate group in which the strip-shaped positive electrode plate and the negative electrode plate are wound with the separator interposed therebetween is housed in the battery can, the negative electrode plate is arranged in the short direction. The burr or burr of the negative electrode plate generated on the cut surface of the electrode plate group is wound so as to face the outer side opposite to the center direction of the electrode plate group at the end of winding of the electrode plate group, and the burr or burr portion By bringing the battery can into contact with the battery can, it is possible to provide a highly reliable cylindrical sealed alkaline storage battery that reduces the internal resistance of the battery, suppresses the voltage drop during discharge, and has a low short circuit failure rate.
【図１】本発明の実施例における円筒密閉型ニッケル−
カドミウム蓄電池の横断面図FIG. 1 is a cylindrical closed-type nickel according to an embodiment of the present invention.
Cross section of a cadmium battery
【図２】本発明を構成する負極板の製造方法を示す図FIG. 2 is a diagram showing a method for manufacturing a negative electrode plate constituting the present invention.
【図３】放電電流値と放電電気量の関係を示す図FIG. 3 is a diagram showing a relationship between a discharge current value and a discharge electricity quantity.
１ 正極板 ２ 負極板 ３ セパレータ ４ バリまたはかえり ５ 電池缶 ６ 芯材 ７ 大寸法の負極板 ８ 固定切断刃 ９ 可動切断刃 DESCRIPTION OF SYMBOLS 1 Positive electrode plate 2 Negative electrode plate 3 Separator 4 Burr or burr 5 Battery can 6 Core material 7 Large size negative electrode plate 8 Fixed cutting blade 9 Movable cutting blade
───────────────────────────────────────────────────── フロントページの続き (72)発明者 伊丹 淳 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 稲葉 吉尚 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Atami 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (2)
を介して巻回した極板群を電池缶に収納してなる円筒密
閉型アルカリ蓄電池において、前記負極板はその短尺方
向の切断面に生じた負極板のバリまたはかえりが、前記
極板群の巻終わりの部分では、前記極板群の中心方向と
は反対の外側を向くように巻回され、前記バリまたはか
えりの箇所で前記電池缶と接触していることを特徴とす
る円筒密閉型アルカリ蓄電池。1. A cylindrical sealed alkaline storage battery comprising a positive electrode plate and a negative electrode plate, each of which is wound with a separator interposed therebetween in a battery can. The negative electrode plate is formed on a cut surface in a short direction. The burr or burr of the negative electrode plate is wound so as to face the outer side opposite to the central direction of the electrode plate group at the end of the winding of the electrode plate group, and the battery can at the burr or burr portion. A cylindrical sealed alkaline storage battery characterized in that it is in contact with.
じた負極板のバリまたはかえりが、前記極板群の巻始め
の部分では、前記極板群の中心方向を向くように巻回さ
れていることを特徴とする請求項１記載の円筒密閉型ア
ルカリ蓄電池。2. The negative electrode plate is wound such that a burr or a burr of the negative electrode plate formed on a cut surface in a short direction of the negative electrode plate faces a central direction of the electrode plate group at a winding start portion of the electrode plate group. The sealed cylindrical alkaline storage battery according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6241232A JP2976825B2 (en) | 1994-10-05 | 1994-10-05 | Cylindrical sealed alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6241232A JP2976825B2 (en) | 1994-10-05 | 1994-10-05 | Cylindrical sealed alkaline storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08106917A true JPH08106917A (en) | 1996-04-23 |
| JP2976825B2 JP2976825B2 (en) | 1999-11-10 |
Family
ID=17071173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6241232A Expired - Lifetime JP2976825B2 (en) | 1994-10-05 | 1994-10-05 | Cylindrical sealed alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2976825B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016170909A (en) * | 2015-03-11 | 2016-09-23 | 日立マクセル株式会社 | Flat battery |
| WO2017018120A1 (en) * | 2015-07-29 | 2017-02-02 | ニッポン高度紙工業株式会社 | Battery positive electrode active material, battery, and method for producing battery positive electrode active material |
-
1994
- 1994-10-05 JP JP6241232A patent/JP2976825B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016170909A (en) * | 2015-03-11 | 2016-09-23 | 日立マクセル株式会社 | Flat battery |
| WO2017018120A1 (en) * | 2015-07-29 | 2017-02-02 | ニッポン高度紙工業株式会社 | Battery positive electrode active material, battery, and method for producing battery positive electrode active material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2976825B2 (en) | 1999-11-10 |
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