JP2001283901A - Alkaline battery - Google Patents
Alkaline batteryInfo
- Publication number
- JP2001283901A JP2001283901A JP2000097194A JP2000097194A JP2001283901A JP 2001283901 A JP2001283901 A JP 2001283901A JP 2000097194 A JP2000097194 A JP 2000097194A JP 2000097194 A JP2000097194 A JP 2000097194A JP 2001283901 A JP2001283901 A JP 2001283901A
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- electrode plate
- negative electrode
- storage battery
- active material
- 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.)
- Pending
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
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はニッケル−水素蓄電
池、ニッケル−カドミウム蓄電池などの正極板と負極板
とをセパレータを介して積層した極板群を備えたアルカ
リ蓄電池に係り、特に、これらの極板の高密度化構造お
よび補液構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alkaline storage battery provided with an electrode group in which a positive electrode plate and a negative electrode plate, such as a nickel-hydrogen storage battery and a nickel-cadmium storage battery, are laminated with a separator interposed therebetween. It relates to a densified structure and a rehydration structure of a plate.
【０００２】[0002]
【従来の技術】近年、正極板と負極板をセパレータを介
して渦巻状に巻回した渦巻状極板群を備えた円筒型アル
カリ蓄電池に代わり、電池使用機器内での体積効率を高
めるために角型アルカリ蓄電池が開発されるようになっ
た。この種の角型アルカリ蓄電池においては、正極板と
負極板をセパレータを介して交互に積層した極板群を角
型の外装缶内に挿入し、正極板より延出する正極リード
を正極端子に接続し、負極板より延出する負極リードを
負極端子に接続した後、電解液を注入し、開口部を封口
体で封止して作製するようにしている。2. Description of the Related Art In recent years, instead of a cylindrical alkaline storage battery having a spirally wound electrode plate group in which a positive electrode plate and a negative electrode plate are spirally wound with a separator interposed therebetween, in order to increase the volumetric efficiency in battery-powered equipment. Prismatic alkaline storage batteries have been developed. In this type of prismatic alkaline storage battery, a positive electrode plate and a negative electrode plate are alternately laminated via a separator, and an electrode plate group is inserted into a rectangular outer can, and a positive electrode lead extending from the positive electrode plate is connected to a positive electrode terminal. After connection, a negative electrode lead extending from the negative electrode plate is connected to the negative electrode terminal, an electrolytic solution is injected, and the opening is sealed with a sealing body.
【０００３】この種の角型アルカリ蓄電池は携帯電話、
ノートブック型パーソナルコンピュータ等の携帯機器用
電源としての需要が急速に拡大し、これに伴って、角型
アルカリ蓄電池のさらなる高容量化、長寿命化が要求さ
れるようになった。このため、この種の角型アルカリ蓄
電池は、例えば、帯状の芯体を共通にしてその左右に２
つの負極板を形成した後、その中央部（連結部）をＵ字
状に折曲し、Ｕ字状に折曲された２つの負極板間にセパ
レータを介して正極板を挟持させた積層構造体の間にセ
パレータを介して正極板を積層して極板群とし、この極
板群を電解液とともに角型外装缶内に挿入して製造され
る。[0003] This type of prismatic alkaline storage battery is used for mobile phones,
Demand for a power source for portable devices such as notebook personal computers has rapidly expanded, and accordingly, a higher capacity and longer life of a rectangular alkaline storage battery has been required. For this reason, this type of prismatic alkaline storage battery has, for example, a common band-shaped core and two
After forming two negative plates, the central part (connection part) is bent in a U-shape, and a positive plate is sandwiched between two U-shaped bent negative plates via a separator. A positive electrode plate is laminated with a separator interposed between the bodies to form an electrode plate group, and the electrode plate group is inserted into a rectangular outer can together with an electrolytic solution.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上述した角
型のアルカリ蓄電池のエネルギー密度をさらに増大させ
ようとした場合、電池の充放電反応に関与しないセパレ
ータを薄型にすれば、セパレータが薄くなった分だけ活
物質の充填量を増加させることが可能となって高エネル
ギー密度で高容量の電池が得られるようになる。しかし
ながら、セパレータを薄型にすればするほどセパレータ
の機械的強度が減少して、内部短絡が発生するようにな
るので、セパレータの薄型化には限界があった。By the way, in order to further increase the energy density of the above-described prismatic alkaline storage battery, if the separator which does not participate in the charge / discharge reaction of the battery is made thinner, the separator becomes thinner. It is possible to increase the filling amount of the active material by the amount, so that a battery with high energy density and high capacity can be obtained. However, as the separator is made thinner, the mechanical strength of the separator is reduced and an internal short circuit occurs, so that there is a limit to the thickness of the separator.
【０００５】ここで、例えば、図７に示すように、中央
の折曲部（連結部）２２ａでＵ字状に折曲された２つの
負極板２２，２２間にセパレータ２３を介して正極板２
１を挟持させて積層構造体とし、これらの２つの積層構
造体の間にセパレータ２３を介して正極板２１を積層し
て極板群２０とし、この極板群２０を電解液とともに角
型外装缶内に挿入してアルカリ蓄電池を形成すると、セ
パレータ２３は６枚が必要となる。Here, as shown in FIG. 7, for example, a cathode plate is interposed between two anode plates 22, 22 bent in a U-shape at a central bent portion (connection portion) 22a with a separator 23 interposed therebetween. 2
1 is sandwiched between them to form a laminated structure, and a positive electrode plate 21 is laminated between these two laminated structures with a separator 23 interposed therebetween to form an electrode plate group 20. When an alkaline storage battery is formed by inserting it in a can, six separators 23 are required.
【０００６】ところが、セパレータを薄型化する代わり
に電池内に配置するセパレータの枚数を減少させ、セパ
レータが減少した分だけ極板の厚みを増大させて活物質
の充填量を増加させると、図３に示すように、中央の折
曲部（連結部）１３ａでＵ字状に折曲された２つの負極
板１３，１３間にセパレータ１６を介して厚みの厚い正
極板１２を挟持させて積層構造体とし、これらの２つの
積層構造体を積層して極板群１０ｘとして、この極板群
１０ｘを電解液とともに外装缶内に挿入してアルカリ蓄
電池を形成すると、セパレータは４枚だけで済むように
なる。However, instead of reducing the thickness of the separator, the number of separators arranged in the battery is reduced, and the thickness of the electrode plate is increased by the reduced number of separators to increase the filling amount of the active material. As shown in the figure, a thick positive electrode plate 12 is sandwiched between two negative plates 13 and 13 bent in a U-shape at a central bent portion (connecting portion) 13a with a separator 16 interposed therebetween. When these two laminated structures are laminated to form an electrode group 10x, and the electrode group 10x is inserted into an outer can together with an electrolytic solution to form an alkaline storage battery, only four separators are required. become.
【０００７】このように、セパレータを薄型化する代わ
りに電池内に配置するセパレータの枚数を減少させれ
ば、セパレータの挿入枚数が減少した分だけ極板の厚み
を増加させて活物質の充填量を増加させることが可能と
なるので、高エネルギー密度で高容量の電池が得られる
ようになる。しかしながら、活物質を高密度に充填し
て、厚みが厚い極板を作製することは困難であるという
問題を生じた。また、極板芯体として、三次元網目構造
の多孔性基板（発泡ニッケルなど）を極板芯体として用
いた極板を製造する場合、極板芯体自体の厚みを厚くす
ることが困難であるという問題も生じた。As described above, if the number of separators arranged in the battery is reduced instead of reducing the thickness of the separators, the thickness of the electrode plate is increased by the reduced number of inserted separators, thereby increasing the amount of the active material. Can be increased, so that a battery with high energy density and high capacity can be obtained. However, there has been a problem that it is difficult to fill the active material at a high density to produce a thick electrode plate. Further, when manufacturing an electrode plate using a porous substrate having a three-dimensional mesh structure (such as foamed nickel) as the electrode plate core, it is difficult to increase the thickness of the electrode plate itself. There was also a problem.
【０００８】さらに、この種のアルカリ蓄電池は充放電
に伴って正極が膨張（膨潤）するため、正極での電解液
の保持率が低下するという、所謂、ドライアウト現象が
生じて、サイクル特性などの電池特性が低下するという
問題も生じた。また、活物質を高密度に充填するように
して、極板の厚みを厚くすると、極板の内部まで電解液
が侵入しにくくなって極板内部での反応性が低下し、活
物質利用率が低下して放電容量が低下するという問題も
生じた。そこで、本発明は上記問題点を解消するために
なされたものであって、活物質の充填密度を向上させて
も活物質利用率が低下しない極板構造として、サイクル
特性および放電容量が向上したアルカリ蓄電池を提供す
ることを目的とするものである。Further, in this type of alkaline storage battery, since the positive electrode expands (swells) with charging and discharging, the so-called dry-out phenomenon occurs in which the retention rate of the electrolytic solution at the positive electrode is reduced, and the cycle characteristics and the like are increased. In addition, there was a problem that the battery characteristics of the battery deteriorated. In addition, when the thickness of the electrode plate is increased by filling the active material at a high density, it is difficult for the electrolyte solution to penetrate into the inside of the electrode plate, and the reactivity inside the electrode plate is reduced. And the discharge capacity is reduced. Therefore, the present invention has been made in order to solve the above problems, and as an electrode plate structure in which the active material utilization rate does not decrease even if the packing density of the active material is improved, cycle characteristics and discharge capacity have been improved. It is an object to provide an alkaline storage battery.
【０００９】[0009]
【課題を解決するための手段およびその作用・効果】上
記目的を達成するため、本発明のアルカリ蓄電池は、正
極あるいは負極の少なくとも一方は電解液を保持する保
液部材を備えるようにしている。このように、極板に電
解液を保持する保液部材を備えるようにすると、活物質
が膨潤しても電解液は保液部材から供給することができ
るので、電解液の保持率が低下することなく、ドライア
ウト現象の発生を防止することができる。これにより、
極板の内部まで電解液が侵入するため、極板内部におい
ても充放電反応が促進されて、活物質利用率が向上し、
放電容量が増大することとなる。Means for Solving the Problems and Functions / Effects To attain the above object, the alkaline storage battery of the present invention has at least one of a positive electrode and a negative electrode provided with a liquid retaining member for holding an electrolytic solution. As described above, when the electrode plate is provided with the liquid retaining member that retains the electrolytic solution, even if the active material swells, the electrolytic solution can be supplied from the liquid retaining member, and the retention rate of the electrolytic solution decreases. Without this, the occurrence of the dryout phenomenon can be prevented. This allows
Since the electrolyte infiltrates the inside of the electrode plate, the charge / discharge reaction is promoted even inside the electrode plate, and the active material utilization rate is improved,
The discharge capacity will increase.
【００１０】また、本発明のアルカリ蓄電池は、正極あ
るいは負極の少なくとも一方は複数の極板を積層して構
成されるとともに、この極板間に電解液を保持する保液
部材を備えるようにしている。このように、正極あるい
は負極の少なくとも一方を積層構造としてこれらの極板
間に電解液を保持する保液部材を備えると、積層される
極板の厚みを薄く形成できるので、これらの極板の活物
質の充填密度を高密度にすることが可能となる。これに
より、積層された極板の容量が増大するとともに、積層
された極板間に保液部材を備えているため、積層された
極板内部においても充放電反応が促進されて活物質利用
率が向上し、電解液の保持率が低下することなく、ドラ
イアウト現象の発生を防止することができるようにな
る。In the alkaline storage battery of the present invention, at least one of the positive electrode and the negative electrode is formed by laminating a plurality of electrode plates, and has a liquid retaining member for holding an electrolytic solution between the electrode plates. I have. As described above, when at least one of the positive electrode and the negative electrode is provided in a laminated structure and the liquid retaining member that holds the electrolytic solution between these plates is provided, the thickness of the laminated plates can be reduced. It is possible to increase the packing density of the active material. As a result, the capacity of the stacked electrode plates is increased, and since a liquid retaining member is provided between the stacked electrode plates, the charge / discharge reaction is promoted even inside the stacked electrode plates, and the active material utilization rate is increased. And the dryout phenomenon can be prevented from occurring without lowering the retention rate of the electrolytic solution.
【００１１】そして、保液部材としては、電解液の保持
性が良好な織布あるいは不織布とすることが好ましく、
また、アルカリ電解液中で使用されるため、耐アルカリ
性の材質を用いる必要がある。また、保液材は極板内に
備えられるので、短絡防止するための機械的強度は必要
ではなく、単に保液性が良好な材質であればよい。この
ことから、短絡防止機能を有するセパレータよりも保液
率が大きい材質により形成し、特に、親水性処理が施さ
れているものが望ましい。[0011] The liquid retaining member is preferably a woven or non-woven fabric having good retention of the electrolyte.
Further, since it is used in an alkaline electrolyte, it is necessary to use an alkali-resistant material. Further, since the liquid retaining material is provided in the electrode plate, it is not necessary to have a mechanical strength for preventing a short circuit, and it is sufficient if the liquid retaining material is simply a material having a good liquid retaining property. For this reason, it is desirable that the separator be formed of a material having a higher liquid retention rate than that of the separator having the function of preventing short-circuit, and be subjected to a hydrophilic treatment.
【００１２】また、アルカリ蓄電池の正極活物質は充放
電に伴って膨潤しやすくなる性質がある。このため、正
極に保液部材を備えると、保液部材の効果を発揮するこ
とができるようになる。また、本発明のような保液部材
を備えた極板を用いる場合は、四角柱状に形成された極
板群を角型（四角柱状）に形成された外装缶内に挿入さ
れる電池に適用することが効果的である。そして、この
ような角型電池としては、ニッケル正極と水素吸蔵合金
負極を用いたニッケル−水素蓄電池とすることが望まし
い。Further, the positive electrode active material of the alkaline storage battery has a property of easily swelling as it is charged and discharged. Therefore, when the positive electrode is provided with a liquid retaining member, the effect of the liquid retaining member can be exhibited. When an electrode plate provided with a liquid retaining member as in the present invention is used, a group of electrode plates formed in a quadrangular prism shape is applied to a battery inserted in an outer can formed in a square shape (rectangular prism shape). It is effective to do. As such a prismatic battery, a nickel-hydrogen storage battery using a nickel positive electrode and a hydrogen storage alloy negative electrode is desirable.
【００１３】[0013]
【発明の実施の形態】以下に、本発明をニッケル−水素
蓄電池に適用した場合の実施形態を図に基づいて説明す
る。なお、図１は２枚の正極板の間に保液部材を備えた
正極と２枚の負極板が連結された負極の間にセパレータ
を介在させて積層した実施例１の極板群を模式的に示す
断面図である。図２は２枚の正極板の間に親水処理され
た保液部材を備えた正極と２枚の負極板が連結された負
極の間にセパレータを介在させて積層した実施例２の極
板群を模式的に示す断面図である。図３は厚みの厚い１
枚の正極板からなる正極と２枚の負極板が連結された負
極の間にセパレータを介在させて積層した比較例の極板
群を模式的に示す断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a nickel-hydrogen storage battery will be described below with reference to the drawings. FIG. 1 schematically illustrates the electrode group of Example 1 in which a separator is interposed between a positive electrode including a liquid retaining member between two positive electrode plates and a negative electrode in which two negative electrode plates are connected, with a separator interposed therebetween. FIG. FIG. 2 schematically illustrates a group of electrode plates of Example 2 in which a separator is interposed between a positive electrode having a liquid retaining member subjected to hydrophilic treatment between two positive electrode plates and a negative electrode in which two negative electrode plates are connected, with a separator interposed therebetween. FIG. FIG. 3 shows a thick 1
It is sectional drawing which shows typically the electrode group of the comparative example which laminated | stacked with the separator interposed between the positive electrode which consists of one positive electrode plate, and the negative electrode which two negative electrode plates were connected.
【００１４】１．正極板の作製 （１）実施例 発泡ニッケルなどの三次元的に連続する空間を有する金
属多孔体（例えば、厚みが１．２ｍｍのもの）からなる
芯体に水酸化ニッケルを主成分とする活物質スラリーを
充填し、乾燥した後、所定の厚み（例えば、０．６３ｍ
ｍ）になるように圧延してニッケル正極板１１を作製し
た。なお、水酸化ニッケルを主成分とする活物質スラリ
ーとしては、例えば、共沈成分として亜鉛２．５質量％
とコバルト１質量％を含有する水酸化ニッケル粉末１０
質量部と、酸化亜鉛粉末３質量部との混合粉末に、ヒド
ロキシプロピルセルロースの０．２質量％水溶液を加え
て撹拌、混合したものを使用した。1. Manufacture of Positive Electrode (1) Example An active material containing nickel hydroxide as a main component was formed on a core made of a porous metal body (for example, having a thickness of 1.2 mm) having a three-dimensionally continuous space such as foamed nickel. After filling and drying the substance slurry, a predetermined thickness (for example, 0.63 m
m) to produce a nickel positive electrode plate 11. In addition, as an active material slurry containing nickel hydroxide as a main component, for example, zinc 2.5% by mass as a coprecipitating component is used.
And nickel hydroxide powder 10 containing 1% by mass of cobalt
A 0.2 mass% aqueous solution of hydroxypropylcellulose was added to a mixed powder of 3 parts by mass of zinc oxide powder and stirred and mixed, and used.
【００１５】（２）比較例 発泡ニッケル等などの三次元的に連続する空間を有する
金属多孔体（例えば、厚みが２．２８ｍｍのもの）から
なる芯体に、上述した実施例と同様の水酸化ニッケルを
主成分とする活物質スラリーを充填し、乾燥した後、所
定の厚み（例えば、１．３８ｍｍ）になるように圧延し
てニッケル正極板１２を作製した。なお、ニッケル正極
板１２の厚みは、上述した実施例のニッケル正極板１１
の２枚分の厚みと、後述する保液部材１４，１５の厚み
の和と等しくなるように調整した。(2) Comparative Example A core made of a porous metal body (for example, having a thickness of 2.28 mm) having a three-dimensionally continuous space such as foamed nickel or the like is provided with the same water as in the above-described embodiment. An active material slurry containing nickel oxide as a main component was filled therein, dried, and then rolled to have a predetermined thickness (for example, 1.38 mm) to produce a nickel positive electrode plate 12. The thickness of the nickel positive electrode plate 12 is the same as that of the nickel positive electrode plate 11 of the above-described embodiment.
Was adjusted to be equal to the sum of the thicknesses of the two liquid retaining members 14 and 15 described later.
【００１６】２．負極板の作製 Ｔｉ−Ｎｉ系あるいはＬａ（もしくはＭｍ）−Ｎｉ系の
多元合金、例えば、ＭｍＮｉ3.4Ｃｏ0.8Ａｌ0.2Ｍｎ0.6
合金よりなる水素吸蔵合金粉末に結着剤としてポリテト
ラフルオロエチレン（ＰＴＦＥ）粉末を水素吸蔵合金粉
末に対して５質量％を加えて混練して、負極活物質ペー
ストを作製した。この負極活物質ペーストを、パンチン
グメタル等からなる金属芯体にその中央部（連結部）１
３ａが露出するように左右両側に塗着した後、両面から
加圧して中央部（連結部）１３ａで接続された２個の水
素吸蔵合金負極板１３，１３を作製した。なお、上述し
た実施例および比較例で作製した正極板１１，１２と負
極板１３の容量比が同一となるように、負極活物質ペー
ストの充填量を調整した。2. Preparation Ti-Ni-based or La (or Mm) -Ni system multi-alloy negative electrode plates, for example, MmNi 3.4 Co 0.8 Al 0.2 Mn 0.6
A negative electrode active material paste was prepared by adding a polytetrafluoroethylene (PTFE) powder as a binder to a hydrogen storage alloy powder made of an alloy and adding 5% by mass to the hydrogen storage alloy powder and kneading the mixture. This negative electrode active material paste is applied to a central portion (connection portion) 1 of a metal core made of punching metal or the like.
After application to both left and right sides so that 3a was exposed, pressure was applied from both sides to produce two hydrogen storage alloy negative electrode plates 13, 13 connected at a central portion (connection portion) 13a. In addition, the filling amount of the negative electrode active material paste was adjusted so that the capacity ratio of the positive electrode plates 11 and 12 and the negative electrode plate 13 manufactured in the above-described Examples and Comparative Examples was the same.
【００１７】なお、上述のようにして作製された実施例
および比較例の正極板厚み、正極活物質密度、正極活物
質量（実施例は正極板２枚）、負極活物質量および正極
基体目付（三次元的に連続する空間を有する金属多孔体
の基体目付）を測定し、比較例の正極板（負極板につい
ては、実施例と比較例は同じである）の数値を１００と
してその比率を求めると、下記の表１に示すような結果
となった。The thickness of the positive electrode plate, the density of the positive electrode active material, the amount of the positive electrode active material (two positive plates in the example), the amount of the negative electrode active material, and the weight of the positive electrode substrate of the examples and the comparative examples produced as described above. (Base weight of a porous metal body having a three-dimensionally continuous space) was measured, and the ratio of the positive electrode plate of the comparative example (the negative electrode plate is the same as that of the embodiment and the comparative example) was set to 100, and the ratio was set to 100. As a result, the results shown in Table 1 below were obtained.
【００１８】[0018]
【表１】 [Table 1]
【００１９】上記表１において、実施例と比較例の正極
活物質密度を比較すると、実施例の正極活物質密度が大
きいことが分かる。これは、実施例の正極板のように、
正極板の厚みを薄くすると活物質充填後の圧延が均一に
行えるため、正極活物質の高密度化が可能となる。これ
に対して、比較例の正極板にあっては、正極板の厚みが
厚くなると、活物質充填後の圧延が均一に行えなくなっ
て高密度化ができなくなるためである。なお、一般的
に、活物質の充填、圧延後に集電タブ（集電リード）を
溶接するために、集電タブが溶接される部分の活物質を
除去する必要があるが、正極板の厚みが厚くなると集電
タブの溶接部分に充填された活物質を完全に除去するこ
とが困難になるが、正極板の厚みを薄くすると、この活
物質の除去が容易になるというメリットも生じる。In Table 1 above, comparing the positive electrode active material densities of the example and the comparative example, it can be seen that the positive electrode active material density of the example is large. This is, like the positive electrode plate of the example,
When the thickness of the positive electrode plate is reduced, the rolling after filling the active material can be performed uniformly, so that the density of the positive electrode active material can be increased. On the other hand, in the positive electrode plate of the comparative example, when the thickness of the positive electrode plate is large, rolling after filling the active material cannot be performed uniformly, and the density cannot be increased. Generally, in order to weld a current collecting tab (current collecting lead) after filling and rolling of the active material, it is necessary to remove the active material at a portion where the current collecting tab is welded. When the thickness of the positive electrode plate increases, it becomes difficult to completely remove the active material filled in the welded portion of the current collecting tab. However, when the thickness of the positive electrode plate is reduced, there is a merit that the removal of the active material is facilitated.
【００２０】３．極板群の作製 （１）実施例１ 上述のように作製した実施例の正極板１１を２枚用い、
これらの２枚の正極板１１，１１の間に、厚みが０．１
２ｍｍのポリプロピレン製の織布あるいは不織布からな
る保液部材１４を介在させて正極とした。一方、上述の
ように作製した中央部（連結部）１３ａで接続された２
個の水素吸蔵合金負極板１３，１３を用いて負極とし
た。ついで、これらの正極と負極との間に厚みが０．１
２ｍｍのポリプロピレン製のセパレータ１６を介在させ
た後、２枚の水素吸蔵合金負極板１３，１３の中央部
（連結部）１３ａを折り曲げて積層構造体とした。これ
らの積層構造体を２組用いて積層して、図１に示すよう
な実施例１の極板群１０ａとした。3. Production of Electrode Plate Group (1) Example 1 Using two positive electrode plates 11 of the example produced as described above,
The thickness between the two positive plates 11 is 0.1
A positive electrode was formed by interposing a liquid retaining member 14 made of a 2 mm polypropylene woven or nonwoven fabric. On the other hand, 2 connected at the central portion (connection portion) 13a manufactured as described above.
A negative electrode was formed using the hydrogen storage alloy negative electrode plates 13, 13. Next, the thickness between the positive electrode and the negative electrode was 0.1
After interposing a 2 mm polypropylene separator 16, the central portion (connection portion) 13 a of the two hydrogen storage alloy negative electrode plates 13, 13 was bent to form a laminated structure. Two sets of these laminated structures were laminated to form an electrode group 10a of Example 1 as shown in FIG.
【００２１】（２）実施例２ 上述のように作製した実施例の正極板１１を２枚用い、
これらの２枚の正極板１１，１１の間に、厚みが０．１
２ｍｍで、スルホン化処理によって親水処理を施したポ
リプロピレン製の織布あるいは不織布からなる保液部材
１５を介在させて正極とした。一方、上述のように作製
した中央部（連結部）１３ａで接続された２個の水素吸
蔵合金負極板１３，１３を用いて負極とした。ついで、
これらの正極と負極との間に厚みが０．１２ｍｍのポリ
プロピレン製のセパレータ１６を介在させた後、２枚の
水素吸蔵合金負極板１３，１３の中央部（連結部）１３
ａを折り曲げて積層構造体とした。これらの積層構造体
を２組用いて積層して、図２に示すような実施例２の極
板群１０ｂとした。(2) Embodiment 2 Using two positive plates 11 of the embodiment manufactured as described above,
The thickness between the two positive plates 11 is 0.1
The positive electrode was formed by interposing a liquid retaining member 15 made of a woven or nonwoven fabric made of polypropylene and having been subjected to hydrophilic treatment by sulfonation at 2 mm. On the other hand, a negative electrode was formed by using two hydrogen storage alloy negative electrode plates 13 and 13 connected at the central portion (connection portion) 13a produced as described above. Then
After interposing a polypropylene separator 16 having a thickness of 0.12 mm between the positive electrode and the negative electrode, the central part (connecting part) 13 of the two hydrogen-absorbing alloy negative electrodes 13, 13 is formed.
a was bent to obtain a laminated structure. Two sets of these stacked structures were stacked to form an electrode group 10b of Example 2 as shown in FIG.
【００２２】（３）比較例 上述のように作製した比較例の正極板１２を用いるとと
もに、上述のように作製した中央部（連結部）１３ａで
接続された２個の水素吸蔵合金負極板１３，１３を用い
て、これらの正極と負極との間に厚みが０．１２ｍｍの
ポリプロピレン製のセパレータ１６を介在させた後、２
枚の水素吸蔵合金負極板１３，１３の中央部（連結部）
１３ａを折り曲げて積層構造体とした。これらの積層構
造体を２組用いて積層して、図３に示すような比較例の
極板群１０ｘとした。(3) Comparative Example While using the positive electrode plate 12 of the comparative example manufactured as described above, the two hydrogen-absorbing alloy negative electrode plates 13 connected at the central portion (connection portion) 13a manufactured as described above. , 13, a polypropylene separator 16 having a thickness of 0.12 mm is interposed between the positive electrode and the negative electrode.
Central part (connection part) of two hydrogen storage alloy negative electrode plates 13, 13
13a was bent to form a laminated structure. Two sets of these laminated structures were laminated to form a group of electrode plates 10x of a comparative example as shown in FIG.
【００２３】４．ニッケル−水素蓄電池の作製 上述のように作製した各極板群１０ａ，１０ｂ，１０ｘ
をそれぞれ有底四角柱状（角型）の金属外装缶内に挿入
し、各極板群１０ａ，１０ｂ，１０ｘの両端部の水素吸
蔵合金負極板１３と金属外装缶の内側面とを緊密に接触
させるとともに、金属芯体が露出した中央部（連結部）
１３ａが金属外装缶の内底面に緊密に接触させる。つい
で、正極端子を有する各封口板と正極板１１（１２）の
上端部に溶接された正極集電タブとをそれぞれ溶接し
た。この後、これらの各金属外装缶内にそれぞれ３０質
量％の水酸化カリウム（ＫＯＨ）水溶液よりなる電解液
を注液した。4. Production of Nickel-Hydrogen Storage Battery Each electrode group 10a, 10b, 10x produced as described above
Is inserted into the bottomed square pillar-shaped (square) metal outer can, and the hydrogen storage alloy negative electrode plate 13 at both ends of each of the electrode groups 10a, 10b, 10x is brought into close contact with the inner surface of the metal outer can. And the central part (connecting part) where the metal core is exposed
13a makes close contact with the inner bottom surface of the metal outer can. Next, each sealing plate having a positive electrode terminal and the positive electrode current collecting tab welded to the upper end of the positive electrode plate 11 (12) were welded. Thereafter, an electrolyte composed of a 30% by mass aqueous solution of potassium hydroxide (KOH) was injected into each of the metal outer cans.
【００２４】ついで、各封口板を各金属外装缶の開口部
に載置して、その接合部をレーザー溶接して、６００ｍ
Ａｈ（幅１６．４ｍｍ、高さ３５．０ｍｍ、厚み５．６
ｍｍ）のニッケル−水素蓄電池Ａ，Ｂ，Ｘをそれぞれ作
製した。なお、実施例１の極板群１０ａを用いたニッケ
ル−水素蓄電池を実施例１の電池Ａとし、実施例２の極
板群１０ｂを用いたニッケル−水素蓄電池を実施例２の
電池Ｂとし、比較例の極板群１０ｘを用いたニッケル−
水素蓄電池を比較例の電池Ｘとした。Next, each sealing plate was placed on the opening of each metal outer can, and the joint was laser-welded to 600 m.
Ah (width 16.4 mm, height 35.0 mm, thickness 5.6
mm) nickel-hydrogen storage batteries A, B, and X, respectively. The nickel-hydrogen storage battery using the electrode group 10a of the first embodiment is referred to as a battery A of the first embodiment, and the nickel-hydrogen storage battery using the electrode group 10b of the second embodiment is referred to as a battery B of the second embodiment. Nickel using electrode group 10x of Comparative Example
The hydrogen storage battery was designated as Battery X of Comparative Example.
【００２５】５．試験 （１）放電容量 上述のように作製した各電池Ａ，Ｂ，Ｘを用いて、室温
（２５℃）で０．１Ｃ（６０ｍＡ）の充電々流で１６時
間充電し、１時間休止させた後、０．２Ｃ（１２０ｍ
Ａ）の放電々流で終止電圧が１．０Ｖになるまで放電さ
せ、１時間休止させるという充放電サイクルを５回繰り
返して、各ニッケル−水素蓄電池Ａ，Ｂ，Ｘを活性化し
た。なお、５サイクル後の放電容量を初期容量として測
定した。[5] Test (1) Discharge capacity Using each of the batteries A, B, and X prepared as described above, the batteries were charged at room temperature (25 ° C.) with a charge current of 0.1 C (60 mA) for 16 hours, and left for 1 hour. After that, 0.2C (120m
Each of the nickel-hydrogen storage batteries A, B, and X was activated by repeating the charge / discharge cycle of discharging the battery until the final voltage reached 1.0 V with the discharge current of A) and suspending for 1 hour five times. The discharge capacity after 5 cycles was measured as the initial capacity.
【００２６】ついで、上述のように活性化した各ニッケ
ル−水素蓄電池Ａ，Ｂ，Ｘを、０．１Ｃ（６０ｍＡ）の
充電々流で１６時間充電した後、１時間休止させた後、
０．２Ｃ（１２０ｍＡ）の放電々流で終止電圧が１．０
Ｖになるまで放電させたときの放電時間より放電容量を
求め、比較例の電池Ｘの放電容量を１００とした場合の
容量比を求めると、下記の表２に示すような結果が得ら
れた。Next, the nickel-hydrogen storage batteries A, B, and X activated as described above were charged for 16 hours at a charge current of 0.1 C (60 mA), and then suspended for 1 hour.
1.0V at 0.2C (120mA) discharge current
When the discharge capacity was calculated from the discharge time when the battery was discharged to V and the capacity ratio when the discharge capacity of the battery X of the comparative example was set to 100, the results shown in Table 2 below were obtained. .
【００２７】[0027]
【表２】 [Table 2]
【００２８】上記表２より明らかなように、実施例１の
電池Ａおよび実施例２の電池Ｂと比較例の電池Ｘとを比
較すると、実施例１の電池Ａおよび実施例２の電池Ｂは
正極活物質量が比較例の電池Ｘよりも２．９％も少ない
のに関わらず、それらの放電容量が等しくなっているこ
とが分かる。これは、実施例１の電池Ａおよび実施例２
の電池Ｂにあっては、正極板１１を２枚とし、これらの
２枚の正極板１１，１１の間に保液部材１４または１５
が配置されているため、各正極板１１，１１の内部まで
電解液が浸透して活物質利用率が向上したためと考えら
れる。As is apparent from Table 2 above, when the battery A of Example 1 and the battery B of Example 2 are compared with the battery X of Comparative Example, the batteries A of Example 1 and the battery B of Example 2 are compared. It can be seen that their discharge capacities are equal regardless of the amount of the positive electrode active material being 2.9% less than that of the battery X of the comparative example. This is because the battery A of Example 1 and the battery of Example 2
In the battery B, the number of the positive electrode plates 11 is two, and the liquid retaining member 14 or 15 is provided between the two positive electrode plates 11 and 11.
This is probably because the electrolyte solution penetrated into the inside of each of the positive electrodes 11 and 11 and the active material utilization was improved.
【００２９】（２）サイクル特性 ついで、周囲温度が２５℃（室温）の雰囲気で、６００
ｍＡ（１Ｃ）の充電電流で、正極が完全に充填された後
に生じる電池電圧の低下（−ΔＶ）が１０ｍＶになるま
で充電した後、１時間休止し、６００ｍＡ（１Ｃ）の放
電電流で終止電圧が１．０Ｖに達するまで放電させた
後、１時間休止するという充放電サイクル試験を行い、
各サイクルの終了後に放電容量と内部抵抗の測定を行っ
た。この放電容量の測定結果に基づいて、初期容量に対
する比率を容量維持率（％）として求めると、図４に示
すような結果となった。また、各サイクル毎の内部抵抗
は図５に示すような結果となった。(2) Cycle Characteristics Next, at an ambient temperature of 25 ° C. (room temperature),
At a charging current of mA (1C), the battery was charged until the decrease in battery voltage (−ΔV) that occurred after the positive electrode was completely filled became 10 mV, then paused for 1 hour, and terminated at a discharging current of 600 mA (1C). Is discharged until the voltage reaches 1.0 V, and then a charge / discharge cycle test of pausing for 1 hour is performed.
After each cycle, the discharge capacity and the internal resistance were measured. When the ratio to the initial capacity was obtained as a capacity retention ratio (%) based on the measurement result of the discharge capacity, the result was as shown in FIG. Further, the internal resistance in each cycle was as shown in FIG.
【００３０】図４から明らかなように、比較例の電池Ｘ
（図４の黒丸印）は充放電サイクルの進行に伴って容量
維持率が低下し、特に、３００サイクルを越えると急激
に容量維持率が低下している。一方、実施例１の電池Ａ
（図４の黒三角印）および実施例２の電池Ｂ（図４の黒
四角印）は充放電サイクルの進行に伴って多少は容量維
持率が低下するが、５００サイクルを経過しても初期容
量に対して９０％程度の容量を維持している。これは、
実施例１の電池Ａおよび実施例２の電池Ｂにあっては、
正極板１１を２枚とし、これらの２枚の正極板１１，１
１の間に保液部材１４または１５が配置されているた
め、充放電サイクルを繰り返しても常に各正極板１１，
１１の内部まで電解液が供給されて、ドライアウトが生
じなかったためと考えられる。As is clear from FIG. 4, the battery X of the comparative example
In FIG. 4 (black circles), the capacity retention rate decreases as the charge / discharge cycle progresses, and particularly, the capacity retention rate sharply decreases after 300 cycles. On the other hand, battery A of Example 1
(Black triangles in FIG. 4) and the battery B of Example 2 (black squares in FIG. 4) show a slight decrease in capacity retention with the progress of the charge / discharge cycle, but the initial capacity after 500 cycles has passed. About 90% of the capacity is maintained. this is,
In the battery A of Example 1 and the battery B of Example 2,
The number of the positive electrode plates 11 is two, and these two positive electrode plates 11, 1
1, the liquid retaining members 14 or 15 are arranged between the positive electrode plates 11 and 11, even if the charge / discharge cycle is repeated.
It is considered that the electrolyte solution was supplied to the inside of No. 11 and no dryout occurred.
【００３１】また、図５から明らかなように、比較例の
電池Ｘ（図５の黒丸印）は充放電サイクルの進行に伴っ
て内部抵抗が増大し、特に、４００サイクルを越えると
急激に内部抵抗が増大している。一方、実施例１の電池
Ａ（図５の黒三角印）および実施例２の電池Ｂ（図５の
黒四角印）は充放電サイクルの進行に伴って内部抵抗が
増大するが、比較例の電池Ｘのようには増大していな
い。これは、実施例１の電池Ａおよび実施例２の電池Ｂ
にあっては、正極板１１を２枚とし、これらの２枚の正
極板１１，１１の間に保液部材１４または１５が配置さ
れているため、充放電サイクルを繰り返しても常に各正
極板１１，１１の内部まで電解液が供給されて、ドライ
アウトが生じなかったためと考えられる。As is clear from FIG. 5, the internal resistance of the battery X of the comparative example (shown by a black circle in FIG. 5) increases as the charge / discharge cycle progresses. Resistance is increasing. On the other hand, the internal resistance of the battery A of Example 1 (black triangle in FIG. 5) and the battery B of Example 2 (black square in FIG. 5) increase with the progress of the charge / discharge cycle. It is not increasing like the battery X. This corresponds to the battery A of Example 1 and the battery B of Example 2.
In this case, since the number of the positive electrode plates 11 is two, and the liquid retaining member 14 or 15 is disposed between the two positive electrode plates 11, 11, each of the positive electrode plates It is considered that the electrolyte solution was supplied to the insides of 11 and 11, and no dryout occurred.
【００３２】（３）放電率特性 ついで、各ニッケル−水素蓄電池Ａ，Ｂ，Ｘを、０．１
Ｃ（６０ｍＡ）の充電々流で１６時間充電した後、１時
間休止させる。その後、０．２Ｃ（１２０ｍＡ）、１Ｃ
（６００ｍＡ）、２Ｃ（１２００ｍＡ）、４Ｃ（２４０
０ｍＡ）の放電々流で終止電圧が１．０Ｖになるまで放
電させたときの放電時間より各放電電流での各放電容量
を求めて、初期容量に対する比率（対初期比）即ち、放
電率特性をそれぞれ求めると図６に示すような結果が得
られた。(3) Discharge Rate Characteristics Next, each nickel-hydrogen storage battery A, B, X
After charging for 16 hours with a charging current of C (60 mA), the system is paused for 1 hour. Then, 0.2C (120mA), 1C
(600 mA), 2C (1200 mA), 4C (240
The discharge capacity at each discharge current is determined from the discharge time when the discharge is performed at a discharge current of 0 mA) until the final voltage reaches 1.0 V, and the ratio to the initial capacity (to the initial capacity), that is, the discharge rate characteristic Were obtained, the results shown in FIG. 6 were obtained.
【００３３】図６から明らかなように、比較例の電池Ｘ
（図６の黒丸印）は高率放電に伴って初期容量に対する
比率（対初期比）が低下し、特に、２Ｃを越えると急激
に対初期比が低下している。一方、実施例１の電池Ａ
（図６の黒三角印）および実施例２の電池Ｂ（図６の黒
四角印）は高率放電を行ってもそれほど対初期比は低下
せず、４Ｃという高率放電においても８０％程度の初期
比を維持している。これは、実施例１の電池Ａおよび実
施例２の電池Ｂにあっては、正極板１１を２枚とし、こ
れらの２枚の正極板１１，１１の間に保液部材１４また
は１５が配置されているため、充放電サイクルを繰り返
しても常に各正極板１１，１１の内部まで電解液が浸透
して活物質利用率が向上したためと考えられる。As is clear from FIG. 6, the battery X of the comparative example
In FIG. 6 (black circles), the ratio to the initial capacity (ratio to the initial capacity) decreases with the high-rate discharge, and particularly, the ratio to the initial capacity sharply decreases when the ratio exceeds 2C. On the other hand, battery A of Example 1
(The black triangle in FIG. 6) and the battery B of Example 2 (the black square in FIG. 6) did not significantly decrease the initial ratio even when high-rate discharge was performed, and was about 80% even at a high-rate discharge of 4C. Maintain the initial ratio. This is because, in the battery A of Example 1 and the battery B of Example 2, the number of the positive electrode plates 11 is two, and the liquid retaining member 14 or 15 is disposed between the two positive electrodes 11. Therefore, it is considered that even if the charge / discharge cycle is repeated, the electrolytic solution always penetrates into the inside of each of the positive electrode plates 11, 11 and the active material utilization rate is improved.
【００３４】また、図４〜図６の容量維持率、サイクル
特性、放電率特性を示す図から明らかなように、実施例
１の電池Ａ（図４、図５、図６の黒三角印）と実施例２
の電池Ｂ（図４、図５、図６の黒四角印）とを比較する
と、容量維持率、サイクル特性、放電率特性のいずれの
特性においても実施例２の電池Ｂの方が向上しているこ
とが分かる。これは、実施例２の電池Ｂにあっては、保
液部材１５としてスルホン化処理によって親水性が付与
されているため、各正極板１１，１１の内部までより電
解液が浸透しやすくなって、活物質利用率がさらに向上
し、ドライアウト現象もさらに低下したためと考えられ
る。Further, as is apparent from the graphs of FIG. 4 to FIG. 6 showing the capacity retention ratio, cycle characteristics, and discharge rate characteristics, the battery A of Example 1 (black triangles in FIG. 4, FIG. 5, FIG. 6) And Example 2
In comparison with the battery B (black squares in FIGS. 4, 5, and 6), the battery B of Example 2 was improved in any of the capacity retention ratio, cycle characteristics, and discharge rate characteristics. You can see that there is. This is because, in the battery B of the second embodiment, since the liquid retaining member 15 is provided with hydrophilicity by the sulfonation treatment, the electrolytic solution permeates more easily into the inside of each of the positive electrodes 11. It is considered that the active material utilization rate was further improved and the dryout phenomenon was further reduced.
【００３５】上述したように、本発明においては、各正
極板１１，１１の間に電解液を保持する保液部材１４
（１５）を配置しているので、活物質が膨潤しても電解
液は保液部材１４（１５）から供給することができるよ
うになって、ドライアウト現象の発生を防止することが
できるとともに、各正極板１１，１１の内部まで電解液
が侵入するため、各正極板１１，１１の内部においても
充放電反応が促進されて、活物質利用率が向上し、放電
容量が増大する。As described above, in the present invention, the liquid retaining member 14 for holding the electrolytic solution between the respective positive electrode plates 11, 11 is provided.
Since (15) is provided, even if the active material swells, the electrolyte can be supplied from the liquid retaining member 14 (15), and the occurrence of the dryout phenomenon can be prevented. Since the electrolytic solution penetrates into the inside of each of the positive plates 11, 11, the charge / discharge reaction is also promoted inside each of the positive plates 11, 11, the active material utilization rate is improved, and the discharge capacity is increased.
【００３６】なお、上述した実施形態においては、保液
部材１５への親水性処理としてスルホン化処理を行う例
について説明したが、スルホン化処理以外に、グラフト
重合処理、コロナ放電処理による親水性処理を施しても
同様な効果が得られる。また、上述した実施形態におい
ては、本発明をニッケル−水素蓄電池に適用する例につ
いて説明したが、ニッケル−水素蓄電池に限らず、ニッ
ケル−カドミウム蓄電池などの他のアルカリ蓄電池に本
発明を適用しても同様な効果が得られる。In the above-described embodiment, an example in which a sulfonation treatment is performed as a hydrophilic treatment on the liquid retaining member 15 has been described. However, in addition to the sulfonation treatment, a graft polymerization treatment and a hydrophilic treatment by corona discharge treatment are performed. The same effect can be obtained by applying. In the above-described embodiment, an example in which the present invention is applied to a nickel-hydrogen storage battery has been described. However, the present invention is not limited to a nickel-hydrogen storage battery, but may be applied to another alkaline storage battery such as a nickel-cadmium storage battery. Has the same effect.
【図１】 ２枚の正極板の間に保液部材を備えた正極と
２枚の負極板が連結された負極の間にセパレータを介在
させて積層した実施例１の極板群を模式的に示す断面図
である。FIG. 1 schematically shows an electrode plate group of Example 1 in which a separator is interposed between a positive electrode provided with a liquid retaining member between two positive electrode plates and a negative electrode in which two negative electrode plates are connected, with a separator interposed therebetween. It is sectional drawing.
【図２】 ２枚の正極板の間に親水処理された保液部材
を備えた正極と２枚の負極板が連結された負極の間にセ
パレータを介在させて積層した実施例２の極板群を模式
的に示す断面図である。FIG. 2 shows an electrode plate group of Example 2 in which a separator is interposed between a positive electrode having a liquid retaining member subjected to hydrophilic treatment between two positive electrode plates and a negative electrode in which two negative electrode plates are connected, with a separator interposed therebetween. It is sectional drawing which shows typically.
【図３】 厚みの厚い１枚の正極板からなる正極と２枚
の負極板が連結された負極の間にセパレータを介在させ
て積層した比較例の極板群を模式的に示す断面図であ
る。FIG. 3 is a cross-sectional view schematically showing an electrode plate group of a comparative example in which a separator is interposed between a positive electrode made of one thick positive electrode plate and a negative electrode in which two negative electrode plates are connected with a separator interposed therebetween. is there.
【図４】 充放電サイクル数に対する容量維持率の関係
を示す図である。FIG. 4 is a diagram showing the relationship between the number of charge / discharge cycles and the capacity retention ratio.
【図５】 充放電サイクル数に対する抵抗値の関係を示
す図である。FIG. 5 is a diagram showing the relationship between the number of charge / discharge cycles and the resistance value.
【図６】 放電率に対する初期容量の比率（対初期比）
を示す図である。FIG. 6: Ratio of initial capacity to discharge rate (vs. initial ratio)
FIG.
【図７】 正極板と２枚の負極板が連結された負極の間
にセパレータを介在させて積層した従来例の極板群を模
式的に示す断面図である。FIG. 7 is a cross-sectional view schematically illustrating a conventional electrode plate group in which a separator is interposed between a positive electrode plate and a negative electrode in which two negative electrode plates are connected, with a separator interposed therebetween.
１０ａ，１０ｂ，１０ｘ…極板群、１１…実施例の正極
板、１２…比較例の正極板、１３…負極板、１３ａ…連
結部、１４…保液部材、１５…親水処理した保液部材、
１６…セパレータ10a, 10b, 10x ... electrode plate group, 11 ... positive electrode plate of example, 12 ... positive electrode plate of comparative example, 13 ... negative electrode plate, 13a ... connecting portion, 14 ... liquid retaining member, 15 ... liquid retaining member subjected to hydrophilic treatment ,
16 ... Separator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長瀬 敬 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 井上 雅雄 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 江西 英二 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 Ｆターム(参考） 5H028 AA06 AA08 BB10 CC08 CC11 EE06 FF02 FF10 5H050 AA08 BA14 CA03 CB16 DA02 DA03 DA17 DA19 FA02 FA16 GA21 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Takashi Nagase 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Masao Inoue 2--5 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Eiji Enishi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 5H028 AA06 AA08 BB10 CC08 CC11 EE06 FF02 FF10 5H050 AA08 BA14 CA03 CB16 DA02 DA03 DA17 DA19 FA02 FA16 GA21
Claims (8)
を介在させて積層した極板群を備えたアルカリ蓄電池で
あって、 前記正極あるいは負極の少なくとも一方の極板は電解液
を保持する保液部材を備えるようにしたことを特徴とす
るアルカリ蓄電池。1. An alkaline storage battery comprising an electrode group stacked with a separator interposed between a pair of positive and negative electrode plates, wherein at least one of the positive electrode and the negative electrode holds an electrolyte. An alkaline storage battery comprising a liquid retaining member.
を介在させて積層した極板群を備えたアルカリ蓄電池で
あって、 前記正極あるいは負極の少なくとも一方の極板は複数の
極板を積層して構成されるとともに、これらの極板間に
電解液を保持する保液部材を備えるようにしたことを特
徴とするアルカリ蓄電池。2. An alkaline storage battery comprising an electrode group stacked with a separator interposed between a pair of positive and negative electrode plates, wherein at least one of the positive electrode and the negative electrode has a plurality of electrode plates. An alkaline storage battery comprising a laminated structure and a liquid retaining member for retaining an electrolytic solution between these electrode plates.
いは不織布であることを特徴とする請求項１または請求
項２に記載のアルカリ蓄電池。3. The alkaline storage battery according to claim 1, wherein the liquid retaining member is an alkali-resistant woven or nonwoven fabric.
タよりも保液率が大きい材質により形成されていること
を特徴とする請求項３に記載のアルカリ蓄電池。4. The alkaline storage battery according to claim 3, wherein the woven or nonwoven fabric is formed of a material having a higher liquid retention rate than the separator.
施されて前記セパレータよりも保液率を大くしたことを
特徴とする請求項４に記載のアルカリ蓄電池。5. The alkaline storage battery according to claim 4, wherein the woven or nonwoven fabric has been subjected to a hydrophilic treatment so as to have a higher liquid retention than the separator.
って膨潤する正極であることを特徴とする請求項１から
請求項５のいずれかに記載のアルカリ蓄電池。6. The alkaline storage battery according to claim 1, wherein the electrode plate provided with the liquid retaining member is a positive electrode that swells with charge and discharge.
角柱状に形成された外装缶内に備えるようにしたことを
特徴とする請求項１から請求項６のいずれかに記載のア
ルカリ蓄電池。7. The alkali according to claim 1, wherein said electrode plate group is formed in a quadrangular prism shape, and is provided in an outer can formed in a quadrangular prism shape. Storage battery.
するニッケル正極とし、前記負極は水素吸蔵合金を活物
質とする水素吸蔵合金負極としたことを特徴とする請求
項１から請求項７のいずれかに記載のアルカリ蓄電池。8. The positive electrode according to claim 1, wherein the positive electrode is a nickel positive electrode using nickel hydroxide as a main active material, and the negative electrode is a hydrogen storage alloy negative electrode using a hydrogen storage alloy as an active material. The alkaline storage battery according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000097194A JP2001283901A (en) | 2000-03-31 | 2000-03-31 | Alkaline battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000097194A JP2001283901A (en) | 2000-03-31 | 2000-03-31 | Alkaline battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001283901A true JP2001283901A (en) | 2001-10-12 |
Family
ID=18611847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000097194A Pending JP2001283901A (en) | 2000-03-31 | 2000-03-31 | Alkaline battery |
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| Country | Link |
|---|---|
| JP (1) | JP2001283901A (en) |
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|---|---|---|---|---|
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| JPH0536436A (en) * | 1991-07-30 | 1993-02-12 | Shin Kobe Electric Mach Co Ltd | Electrode plate group for storage battery and manufacture thereof |
| JPH06267587A (en) * | 1993-03-15 | 1994-09-22 | Yuasa Corp | Sealed alkali-zinc secondary battery |
| JPH06333568A (en) * | 1993-05-24 | 1994-12-02 | Matsushita Electric Ind Co Ltd | Sealed metal oxide-hydrogen battery, and its manufacture |
| JPH09180753A (en) * | 1995-12-22 | 1997-07-11 | Japan Storage Battery Co Ltd | Nickel-metal hydride battery |
| JPH09283133A (en) * | 1996-04-18 | 1997-10-31 | Matsushita Electric Ind Co Ltd | Nickel electrodefor alkaline storage battery and manufacture thereof |
| JPH11339839A (en) * | 1998-05-28 | 1999-12-10 | Matsushita Electric Ind Co Ltd | Square or thin secondary battery |
-
2000
- 2000-03-31 JP JP2000097194A patent/JP2001283901A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5590078A (en) * | 1978-12-27 | 1980-07-08 | Matsushita Electric Ind Co Ltd | Ni-zn battery |
| JPS6225465U (en) * | 1985-07-30 | 1987-02-16 | ||
| JPH01211857A (en) * | 1988-02-18 | 1989-08-25 | Hitachi Chem Co Ltd | Nickel electrode for alkaline storage battery |
| JPH04349348A (en) * | 1990-11-30 | 1992-12-03 | Matsushita Electric Ind Co Ltd | Metal oxide-hydrogen storage battery |
| JPH0536436A (en) * | 1991-07-30 | 1993-02-12 | Shin Kobe Electric Mach Co Ltd | Electrode plate group for storage battery and manufacture thereof |
| JPH06267587A (en) * | 1993-03-15 | 1994-09-22 | Yuasa Corp | Sealed alkali-zinc secondary battery |
| JPH06333568A (en) * | 1993-05-24 | 1994-12-02 | Matsushita Electric Ind Co Ltd | Sealed metal oxide-hydrogen battery, and its manufacture |
| JPH09180753A (en) * | 1995-12-22 | 1997-07-11 | Japan Storage Battery Co Ltd | Nickel-metal hydride battery |
| JPH09283133A (en) * | 1996-04-18 | 1997-10-31 | Matsushita Electric Ind Co Ltd | Nickel electrodefor alkaline storage battery and manufacture thereof |
| JPH11339839A (en) * | 1998-05-28 | 1999-12-10 | Matsushita Electric Ind Co Ltd | Square or thin secondary battery |
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