JPH103938A - Alkaline storage battery - Google Patents
Alkaline storage batteryInfo
- Publication number
- JPH103938A JPH103938A JP8172914A JP17291496A JPH103938A JP H103938 A JPH103938 A JP H103938A JP 8172914 A JP8172914 A JP 8172914A JP 17291496 A JP17291496 A JP 17291496A JP H103938 A JPH103938 A JP H103938A
- Authority
- JP
- Japan
- Prior art keywords
- separator
- positive
- thickness
- storage battery
- region
- 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
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- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ニッケル水素電
池、ニッケルカドミウム電池、ニッケル鉄電池、ニッケ
ル亜鉛電池などのアルカリ蓄電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alkaline storage battery such as a nickel hydride battery, a nickel cadmium battery, a nickel iron battery and a nickel zinc battery.
【０００２】[0002]
【従来の技術】従来のアルカリ蓄電池は、多数枚の正極
板と負極板をセパレータを介して交互に積層して成る極
板群を電槽内に収容し、電解液を注入し、気密に施蓋し
て成る密閉アルカリ蓄電池は、携帯用機器、非常用電源
などに広く用いられている。図９は、従来の大型密閉ア
ルカリ蓄電池の１例の電槽蓋を除去した模式平面図を示
す。Ａは金属製角形電槽、Ｂは該電槽Ａ内に収容された
極板群を示す。極板群Ｂは、交互に積層した多数枚の正
極板Ｐと負極板Ｎの各正，負極板間に図１０示の長尺の
帯状セパレータＣをじぐざぐ状に折り曲げて介在させて
構成したものである。次に、このように構成したアルカ
リ蓄電池に、所定量のアルカリ電解液を注入した後、電
槽Ａ上面に気密に電槽蓋を施して密閉アルカリ蓄電池と
したものである。2. Description of the Related Art In a conventional alkaline storage battery, a group of electrode plates formed by alternately laminating a large number of positive plates and negative plates via a separator is housed in a battery case, an electrolyte is injected, and the battery is hermetically sealed. A sealed alkaline storage battery with a lid is widely used for portable equipment, emergency power supplies, and the like. FIG. 9 is a schematic plan view of an example of a conventional large-sized sealed alkaline storage battery with a battery case cover removed. A indicates a metal square battery case, and B indicates an electrode group housed in the battery case A. The electrode plate group B is configured such that a long strip-shaped separator C shown in FIG. 10 is bent and interposed between each of the positive and negative electrode plates of the positive electrode plate P and the negative electrode plate N which are alternately stacked. Things. Next, after injecting a predetermined amount of alkaline electrolyte into the alkaline storage battery thus configured, a battery case lid is provided on the upper surface of the battery case A in an airtight manner to obtain a sealed alkaline storage battery.
【０００３】[0003]
【発明が解決しようとする課題】しかし乍ら、上記従来
の密閉アルカリ蓄電池は、高温での充電効率が悪く、特
に大形の密閉アルカリ蓄電池において、特に高温での充
電効率が悪く、サイクル寿命が特に短くなる欠点を有す
る。この原因は、通常充電電流が大きいため充電末期の
発熱量が多いことに加え、外部に面した電池容器の面積
が発熱量に対して少ないために放熱しにくいこと、密閉
電池のため電解液が少なく内部の発熱を外部に熱伝導し
にくい密閉構造となっていることなどが考えられるが、
種々検討、分析を重ねた所、特に、高温雰囲気下は、密
閉電池の中央部が、換言すれば、極板群の積層方向の中
央部が特に非常に高温となることが充電効率の低下、充
放電サイクル寿命の短縮を導くように思われる。また、
特に、ニッケル水素電池を大形密閉構造とした場合、電
池の中心部が高温となるとＭＨ極の腐食が進み、ＭＨ極
内に電解液が取り込まれることにより、液涸れによる短
寿命をもたらすことが認められた。発明者は、上記従来
のアルカリ蓄電池の検討、分析に基づいて、高温での充
電効率の向上、電池寿命の延長のため、鋭意研究を重ね
上記の不都合を解決した。However, the above-mentioned conventional sealed alkaline storage battery has poor charging efficiency at high temperatures, and particularly in a large sealed alkaline storage battery, the charging efficiency at high temperatures is particularly poor, and the cycle life is short. It has the disadvantage of being particularly short. This is due to the fact that the charge current is large and the calorific value at the end of charging is large, and the area of the battery container facing the outside is small compared to the calorific value. It is conceivable that it has a sealed structure that is less likely to conduct heat internally to the outside,
After various studies and analysis, especially under high temperature atmosphere, the central part of the sealed battery, in other words, the central part in the stacking direction of the electrode group becomes extremely high in temperature, and the charging efficiency is reduced. It appears to lead to a shorter charge and discharge cycle life. Also,
In particular, when the nickel-metal hydride battery has a large sealed structure, when the temperature of the central portion of the battery becomes high, the corrosion of the MH electrode progresses, and the electrolyte is taken into the MH electrode, thereby resulting in a short life due to drying out. Admitted. The present inventors have conducted intensive studies based on the above-described examination and analysis of the conventional alkaline storage battery to improve the charging efficiency at a high temperature and extend the life of the battery, and solved the above-mentioned disadvantages.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記従来の課
題を解決したアルカリ蓄電池を提供するもので、多数枚
の正極板と負極板を、セパレータを介して交互に積層し
て成る極板群を電槽内に収容し、且つアルカリ電解液を
注入して成るアルカリ蓄電池において、該極板群の積層
方向における中間域部に位置する各正，負極板間に介在
するセパレータの厚さを、その前域部及び後域部に位置
する各正，負極板間に介在するセパレータの厚さより厚
くしたことを特徴とする。本発明の上記のアルカリ蓄電
池において、セパレータとして、長尺の帯状セパレータ
を用いる場合は次のように構成する。即ち、多数枚の正
極板と負極板をじぐざぐ状に折り曲げた長尺の帯状セパ
レータを介して交互に積層して成る極板群を構成するに
当たり、該長尺の帯状セパレータとしてその長さ方向に
おける中間帯域部のセパレータの厚さをその前帯域部及
び後帯域部のセパレータの厚さより厚くして成るものを
用い、これをじぐざぐ状に折り曲げて、該極板群の中間
帯域部に位置する各正，負極板間に介在するセパレータ
を、その該中間帯域部で構成し、該極板群の前域部及び
後域部に位置する各正，負極板間に介在するセパレータ
を、その前帯域部及び後帯域部で、夫々構成したことを
特徴とする。また、本発明の上記のアルカリ蓄電池にお
いて、セパレータとして、リーフ状セパレータを用いる
場合は次のように構成する。即ち、多数枚の正極板と負
極板をリーフ状セパレータを介して交互に積層して成る
極板群を構成するに当たり、該極板群の中間域部に位置
する各正，負極板間に介在せしめるリーフ状セパレータ
シートの厚さが、その前域部及び後域部に位置する各
正，負極板間に介在するリーフ状セパレータシートの厚
さより厚いものを使用したことを特徴とする。本発明の
長尺の帯状セパレータは、次のように構成する。即ち、
少なくとも１枚の長尺の帯状セパレータシートの長さ方
向の中間帯域部に、少なくとも１枚の帯状セパレータシ
ートを貼着して構成したことを特徴とする。或いは、上
記に代え、本発明の長尺の帯状セパレータは次のように
構成する。即ち、該長尺の帯状セパレータは、その中間
帯域部を構成すべき帯状セパレータシートの厚さを、そ
の前域部及び後域部を構成すべき帯状セパレータシート
の厚さより厚いものを使用し、その両端を、前記の前域
部及び後域部を構成すべき帯状セパレータシートの対向
端に接続して構成する。また、本発明の上記のアルカリ
蓄電池において、セパレータとして、リーフ状セパレー
タを用いる場合は、本発明の極板群は次のように構成す
る。即ち、該極板群の該中間域部に位置する各正，負極
板間に介在せしめるリーフ状セパレータシートの枚数
を、その前域部及び後域部の各正，負極板間に介在せし
めるリーフ状セパレータシートの枚数より少なくとも１
枚多く介在せしめて構成する。或いは、上記に代え、本
発明の極板群は次のように構成する。即ち、該極板群の
該中間域部に位置する各正，負極板間に介在せしめるリ
ーフ状セパレータシートは、その前域部及び後域部に位
置する各正，負極板間に介在せしめるリーフ状セパレー
タのシートより肉厚のものを介在せしめて構成する。SUMMARY OF THE INVENTION The present invention provides an alkaline storage battery which solves the above-mentioned conventional problems, and comprises an electrode plate formed by alternately stacking a large number of positive and negative plates via a separator. In an alkaline storage battery in which a group is accommodated in a battery case and an alkaline electrolyte is injected, the thickness of a separator interposed between each of the positive and negative electrodes located in an intermediate region in the stacking direction of the electrode group is reduced. The separator is thicker than the separator interposed between the positive and negative plates located in the front region and the rear region. In the above alkaline storage battery of the present invention, when a long strip-shaped separator is used as the separator, it is configured as follows. That is, in forming an electrode plate group formed by alternately laminating a large number of positive and negative electrode plates via a long strip-like separator that is bent in a zigzag manner, the length direction of the long strip-like separator is determined. The thickness of the separator in the intermediate zone is larger than the thickness of the separators in the front zone and the rear zone, and this is bent in a zigzag manner to be positioned in the intermediate zone of the electrode plate group. A separator interposed between the positive and negative plates to be formed is constituted by the intermediate zone, and a separator interposed between the positive and negative plates located in a front region and a rear region of the electrode group is formed by It is characterized in that each of the front band section and the rear band section is configured. In the above alkaline storage battery of the present invention, when a leaf-shaped separator is used as the separator, the configuration is as follows. That is, when forming an electrode plate group in which a large number of positive electrode plates and negative electrode plates are alternately laminated via a leaf-shaped separator, the positive electrode plate and the negative electrode plate are interposed between the positive and negative electrode plates located in the intermediate region of the electrode plate group. The thickness of the leaf-shaped separator sheet to be made is larger than the thickness of the leaf-shaped separator sheet interposed between the positive and negative electrode plates located in the front region and the rear region. The long strip separator of the present invention is configured as follows. That is,
It is characterized in that at least one strip-shaped separator sheet is attached to an intermediate band portion in the length direction of at least one long strip-shaped separator sheet. Alternatively, instead of the above, the long strip-shaped separator of the present invention is configured as follows. That is, the long band-shaped separator, the thickness of the band-shaped separator sheet that should constitute the intermediate band portion, using a thicker than the thickness of the band-shaped separator sheet that should constitute the front region and the rear region, Both ends are connected to the opposite ends of the strip-shaped separator sheet to form the front region and the rear region. In the above alkaline storage battery of the present invention, when a leaf separator is used as the separator, the electrode plate group of the present invention is configured as follows. That is, the number of leaf separator sheets interposed between the positive and negative plates located in the intermediate region of the electrode plate group is determined by the number of leaves interposed between the positive and negative plates in the front region and the rear region. At least one greater than the number of separator sheets
It is configured by interposing many sheets. Alternatively, instead of the above, the electrode plate group of the present invention is configured as follows. That is, the leaf-like separator sheet interposed between the positive and negative plates located in the intermediate region of the electrode plate group is a leaf-shaped separator sheet interposed between the positive and negative plates located in the front region and the rear region. It is constituted by interposing a thicker sheet than the separator sheet.
【０００５】[0005]
【発明の実施の形態】次に、本発明の実施の形態を添付
図面を参照し説明する。図１は、本発明の実施の１例の
電槽蓋を除いたアルカリ蓄電池の平面図、図２は、図１
示のアルカリ蓄電池１の極板群２を構成する交互に積層
した多数枚の正，負極板の各正極板３と負極板４との間
に介在せしめた下記詳述する長尺の帯状セパレータ５の
斜視図である。本発明の構成を分かり易くするため、図
１のアルカリ蓄電池１の平面図を模式的に表わした。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of an alkaline storage battery without a battery case cover according to an embodiment of the present invention, and FIG.
A long strip separator 5 described below, which is interposed between each of the positive and negative electrode plates 3 and the negative electrode plate 4 of a large number of alternately stacked positive and negative electrode plates constituting the electrode group 2 of the alkaline storage battery 1 shown in FIG. It is a perspective view of. In order to make the configuration of the present invention easy to understand, a plan view of the alkaline storage battery 1 of FIG. 1 is schematically shown.
【０００６】更に詳細には、図１のアルカリ蓄電池１
は、多数枚の正極板３と負極板４を図示の例では、正極
板３を１５枚と負極板４を１４枚をセパレータ５を介し
て交互に積層して極板群２を構成し、これを大形の金属
製角形電槽６内に収容し、アルカリ電解液の所定量を注
入したもので、これに電槽蓋（図示しない）を気密にシ
ールして大形の密閉アルカリ蓄電池としたものである。
説明の便宜上、各正極板３と負極板４電流取出し用リー
ド片及び極板群２と電槽内壁面間に介在させたスペーサ
ーは、図示せず、省略してある。More specifically, the alkaline storage battery 1 shown in FIG.
In the example shown in the drawing, a large number of positive electrode plates 3 and negative electrode plates 4 constitute 15 electrode plates 3 and 14 negative electrode plates 4 alternately with a separator 5 interposed therebetween to form an electrode plate group 2. This is housed in a large metal square battery case 6, into which a predetermined amount of an alkaline electrolyte is injected, and a battery case lid (not shown) is hermetically sealed to form a large sealed alkaline storage battery. It was done.
For convenience of explanation, each positive electrode plate 3 and negative electrode plate 4 and a lead piece for taking out current and a spacer interposed between the electrode plate group 2 and the inner wall surface of the battery case are not shown and are omitted.
【０００７】上記のアルカリ蓄電池の基本構成におい
て、本発明は、該極板群２の積層方向における中間域部
Ｍに位置する各正，負極板３，４間に介在せしめるセパ
レータの厚さを該極板群２の積層方向の前域部Ｆ及び後
域部Ｒに位置する各正，負極板３，４間に介在せしめる
セパレータの厚さより厚くしたことを特徴とする。セパ
レータとしては、従来公知の任意の材質から成る微多孔
性シートが使用される。In the basic structure of the alkaline storage battery described above, the present invention sets the thickness of the separator interposed between the positive and negative electrode plates 3 and 4 located in the intermediate region M in the laminating direction of the electrode plate group 2. It is characterized in that the thickness is greater than the thickness of the separator interposed between the positive and negative electrodes 3, 4 located in the front region F and the rear region R in the stacking direction of the electrode plate group 2. As the separator, a microporous sheet made of a conventionally known arbitrary material is used.
【０００８】図１における本発明の極板群２は、図２に
示すように、各正，負極板３，４間に介在せしめるセパ
レータとして長尺の帯状セパレータ５を使用し、これを
図２に示すように構成したものを使用することを特徴と
する構成を有する。即ち、図２に示すように、１枚のナ
イロンなどの合成樹脂製の微多孔性シートから成る長尺
の帯状セパレータシート５ａのその長さ方向の中間帯域
部ｍに、前記の極板群２の該中間域部Ｍに位置する複数
枚の正，負極板３，４、即ち、４枚の正極板３と５枚の
負極板４の夫々の間にじぐざく状に折り曲げて介在せし
めるに足る長さのナイロンなどの合成樹脂製の微多孔性
シートから成る帯状セパレータシート５ｂを重合貼着
し、２枚のセパレータシート５ａ，５ｂから成る厚さＴ
を有する中間帯域部ｍに構成する一方、１枚のセパレー
タシート５ｂから成る厚さｔを有する前帯域部ｆ及び後
帯域部ｒよりも厚く形成したものを作製し、この本発明
の長尺の帯状セパレータ５を図１に示すように、該極板
群２の各正，負極板間３，４にじぐざく状に折り曲げて
介在させるとき、その重合セパレータシート（５ａ）＋
（５ｂ）から成る肉厚のじぐざぐ状に折り曲げられた中
間域帯部ｍが該極板群２の該中間域部Ｍに位置する正，
負極板３，４間に介在せしめ、該極板群２の前域部Ｆ及
び後域部Ｒに位置する各正，負極板３，４間にその１枚
のセパレータシート（５ａ）から成る肉薄のじぐざぐ状
に折り曲げられた前帯域部ｆ及び後帯域部ｒを介在せし
めるようにして極板群２を構成し、このように構成した
極板群２を角形電槽６内に、所定量のアルカリ電解液を
該極板群に注入含浸せしめ、次でその上面に電槽蓋（図
示しない）を気液密に結着して密閉アルカリ蓄電池を構
成した。The electrode group 2 of the present invention shown in FIG. 1 uses a long strip-shaped separator 5 as a separator interposed between the positive and negative electrode plates 3 and 4 as shown in FIG. The configuration is characterized by using the one configured as shown in FIG. That is, as shown in FIG. 2, the electrode group 2 is attached to the intermediate band m in the longitudinal direction of a long strip-shaped separator sheet 5a made of one microporous sheet made of a synthetic resin such as nylon. Of the plurality of positive and negative plates 3, 4 located in the intermediate region M, that is, between the four positive plates 3 and the five negative plates 4, respectively. A strip-shaped separator sheet 5b made of a microporous sheet made of a synthetic resin such as nylon having a sufficient length is polymerized and adhered, and a thickness T composed of two separator sheets 5a and 5b is formed.
While the intermediate zone m having the thickness t is made of a single separator sheet 5b and formed thicker than the front zone f and the rear zone r having a thickness t. As shown in FIG. 1, when the belt-shaped separator 5 is bent and interposed between the positive and negative electrode plates 3 and 4 of the electrode plate group 2, the polymerized separator sheet (5a) +
(5b) A thick, zigzag-shaped intermediate region band portion m composed of the positive and negative intermediate regions M located in the intermediate region portion M of the electrode plate group 2.
It is interposed between the negative electrode plates 3 and 4, and is formed of a single separator sheet (5 a) between the positive and negative electrode plates 3 and 4 located in the front region F and the rear region R of the electrode plate group 2. The electrode plate group 2 is configured so as to interpose the front band portion f and the rear band portion r bent in a zigzag manner, and the electrode plate group 2 thus configured is placed in a rectangular battery case 6 in a predetermined amount. The electrode group was poured and impregnated with the alkaline electrolyte solution, and then a battery case lid (not shown) was gas-liquid tightly bonded to the upper surface of the electrode plate group to form a sealed alkaline storage battery.
【０００９】本発明の上記の密閉アルカリ蓄電池は、そ
の電池の中央部に、即ち、その極板群２の積層方向の中
央部を含む中間域部Ｍに位置する肉厚の重合するセパレ
ータシート５ａ＋５ｂに注入された電解液は、その前域
部Ｆ及び後域部Ｒに位置する肉薄のセパレータシート５
ａに比し特に長期に亘り保持されるので、この中央部の
熱を電槽に伝導し外部に放熱することを容易にし、極板
群２の中央部が特に高温となることを防止し、これによ
り高温雰囲気下での充電効率の低下を防止し、サイクル
寿命を延長できる。また、負極板４が水素吸蔵合金極か
ら成る場合は、腐食の進行を阻止し、特にその中間域部
内における電解液が取り込まれて液涸れることを防止
し、電池寿命を延長できる。一方、極板群２の前域部Ｆ
及び後域部Ｒは、発熱量が比較的少ないので、前記のセ
パレータの薄い前帯域部ｆ及び後帯域部ｒに含有する電
解液量は比較的少量で充分である。The above-mentioned sealed alkaline storage battery of the present invention has a thick separator sheet 5a + 5b which is located at the center of the battery, that is, in the intermediate region M including the center of the electrode group 2 in the stacking direction. Is injected into the separator sheet 5 located in the front region F and the rear region R thereof.
Since it is held for a particularly long period of time as compared with a, it is easy to conduct the heat of this central part to the battery case and radiate the heat to the outside, and to prevent the central part of the electrode plate group 2 from becoming particularly high in temperature, This can prevent a decrease in charging efficiency in a high-temperature atmosphere and extend the cycle life. When the negative electrode plate 4 is made of a hydrogen-absorbing alloy electrode, the progress of corrosion is prevented, and in particular, the electrolyte in the intermediate region is prevented from being taken out and dried up, thereby extending the battery life. On the other hand, the front region F of the electrode plate group 2
Since the calorific value of the rear zone R is relatively small, the amount of the electrolyte contained in the thin front zone f and the rear zone r of the separator is relatively small.
【００１０】上記の実施例では、本発明の該長尺の帯状
セパレータ５は、１枚の長尺の帯状セパレータシート５
ａの中間帯域部に１枚の帯状セパレータシート５ｂを貼
着して構成したが、長尺の帯状セパレータ５ａを２枚重
合したものを使用するときは、その中間帯域部ｍに少な
くとも１枚の帯状セパレータシートを貼着してその中間
帯部ｍの肉厚を所望の厚さに調整することができる。In the above embodiment, the long strip separator 5 of the present invention is a single long strip separator sheet 5.
Although a single band-shaped separator sheet 5b is attached to the intermediate band portion a of FIG. 3A, when a long band-shaped separator 5a is used by superposing two sheets, at least one sheet is provided in the intermediate band portion m. By attaching a belt-like separator sheet, the thickness of the intermediate belt portion m can be adjusted to a desired thickness.
【００１１】図３及び図４は、本発明の他の実施例を示
す。この実施例は、極板群２の該中間域部Ｍに位置する
各正，負極板間に介在するセパレータの厚さをその前域
部Ｆ及び後域部Ｒに夫々位置する各正，負極板３，４間
に介在するセパレータの厚さより厚く構成する手段とし
て、先の実施例の長尺の帯状セパレータ５のように、そ
の中間帯域部ｍを複数枚のセパレータシート５ａ，５ｂ
の重合で構成するものに代え、極板群２の該中間域部Ｍ
に位置する各正，負極板３，４間にじぐざぐ状に折り曲
げて介在させるに対応する長尺の帯状セパレータ５′の
中間域部ｍを構成するための帯状セパレータシート５ｃ
として、その極板群２の該前域部Ｆと該後域部Ｒに夫々
位置する各正，負極板３，４間にじぐざぐ状に折り曲げ
て介在させるに対応する長尺の帯状セパレータ５′の前
帯域部及び後帯域部を夫々構成するための帯状セパレー
タシート５ｄ及び５ｄの厚さｔに比し厚いものを使用
し、肉厚の帯状セパレータシート５ｃの両端を前記の前
帯域部用及び後帯域部用の帯状セパレータ５ｄ，５ｄの
対向する内端に接続して、図示の例では、接着剤や加熱
溶着などで重合接続して図４示の長尺の帯状セパレータ
５′を構成したものである。７は接続部を示す。FIGS. 3 and 4 show another embodiment of the present invention. In this embodiment, the thickness of the separator interposed between the positive and negative electrode plates located in the intermediate region M of the electrode plate group 2 is adjusted by the thickness of the positive and negative electrodes located in the front region F and the rear region R, respectively. As means for configuring the separator to be thicker than the separators interposed between the plates 3 and 4, the intermediate band portion m is divided into a plurality of separator sheets 5a and 5b as in the long strip separator 5 in the previous embodiment.
Of the intermediate region M of the electrode plate group 2 in place of the
Strip-shaped separator sheet 5c for forming an intermediate region m of a long strip-shaped separator 5 'corresponding to a zigzag bending and interposition between the respective positive and negative electrode plates 3, 4
A long band-like separator 5 corresponding to a zigzag shape and interposed between the positive and negative plates 3, 4 respectively located in the front region F and the rear region R of the electrode plate group 2. ′, Which are thicker than the thickness t of the band-shaped separator sheets 5d and 5d for forming the front band portion and the rear band portion, respectively, and using both ends of the thick band-shaped separator sheet 5c for the front band portion. 4 are connected to the inner ends of the band separators 5d, 5d for the rear band, and in the example shown in the figure, they are superposed and connected by an adhesive or heat welding to form a long band separator 5 'shown in FIG. It was done. Reference numeral 7 denotes a connection portion.
【００１２】而して、上記の長尺の帯状セパレータ５′
を用いて図３示のように極板群２を構成する。即ち、そ
の中間帯域部ｍを該極板群２の該中間域部Ｍに対応する
ように、その位置にある各正，負極板３，４間にじぐざ
ぐ状に折り曲げて介在するようにして、特に、その極板
群２の該中間域部Ｍに位置する各正，負極板３，４間に
介在するセパレータの厚さをその該前域部Ｆ及び後域部
Ｒに位置する各正，負極板３，４間にその前帯域部ｆ及
び後帯域部ｒをじぐざぐ状に折り曲げ介在させて各正，
負極板３，４間に介在するセパレータの厚さよりも厚い
構成の極板群２とし、これを電槽１内に収容し、所定量
の電解液を注入し、以下先の実施例と同様にして本発明
のアルカリ蓄電池としたものである。Thus, the long strip separator 5 'described above is used.
Is used to form the electrode group 2 as shown in FIG. That is, the intermediate band portion m is bent and interposed between the positive and negative electrode plates 3 and 4 located at the position so as to correspond to the intermediate region portion M of the electrode plate group 2. In particular, the thickness of the separator interposed between the positive and negative electrodes 3 and 4 located in the intermediate region M of the electrode plate group 2 is adjusted to the thickness of each positive electrode located in the front region F and the rear region R. , A front band portion f and a rear band portion r are bent between the positive and negative plates 3 and 4 so as to be interposed.
An electrode group 2 having a configuration thicker than the thickness of the separator interposed between the negative electrodes 3 and 4 is accommodated in the battery case 1 and a predetermined amount of electrolyte is injected thereinto. To provide the alkaline storage battery of the present invention.
【００１３】上記の２つの実施の態様では、長尺の帯状
セパレータ５又は５′を１枚使用したが、その２枚を重
合しても良い。In the above two embodiments, one long strip separator 5 or 5 'is used, but two of them may be superposed.
【００１４】図５は、本発明の更に他の実施例を示す。
この実施例では、極板群２の各正，負極板間に介在せし
めるセパレータとして、先の長尺の帯状セパレータに代
え、方形のセパレータ、いわゆるリーフ状セパレータ５
Ｌを用いた場合を示す。更に詳細には、極板群２を次の
ように構成した。即ちその中間域部Ｍに位置する各正，
負極板３，４間に介在するセパレータとして、例えば図
６（ａ）示の例えば合成樹脂製の微多孔性シートから成
るリーフ状セパレータシート５Ｌを、図６（ｂ）示のよ
うに例えば、その２枚づつを、図５示のように、その極
板群２の中間域部Ｍに位置する各正，負極板３，４間に
介在させ、その前域部Ｆ及び後域部Ｒに位置する各正，
負極板４，３間には図６（ａ）示のリーフ状セパレータ
シート５Ｌの１枚づつを介在させて、その該中間域部Ｒ
に介在する各２枚のリーフ状セパレータ５Ｌ＋５Ｌから
成るセパレータの厚さＴを、該前域部Ｆ及び後域部Ｒに
介在させた１枚のリーフ状セパレータ５Ｌから成るセパ
レータの厚さｔよりも厚くして成る極板群２とし、これ
を電槽６内に収容し、これに所定量の電解液を注入し、
以下実施例１と同様にして密閉アルカリ蓄電池とした。FIG. 5 shows still another embodiment of the present invention.
In this embodiment, a rectangular separator, a so-called leaf separator 5, is used as a separator to be interposed between the positive and negative plates of the electrode plate group 2 instead of the long strip separator.
The case where L is used is shown. More specifically, the electrode group 2 was configured as follows. That is, each positive located in the intermediate region M,
As a separator interposed between the negative electrode plates 3 and 4, for example, a leaf-shaped separator sheet 5L made of a microporous sheet made of, for example, a synthetic resin shown in FIG. As shown in FIG. 5, two sheets are interposed between the positive and negative plates 3 and 4 located in the intermediate region M of the electrode plate group 2 and located in the front region F and the rear region R. Each positive,
6A, one sheet of the leaf-like separator sheet 5L shown in FIG.
The thickness T of the separator composed of two leaf-shaped separators 5L + 5L interposed in the front region F and the thickness t of the separator composed of one leaf-shaped separator 5L interposed in the rear region R is larger than that of the separator t. Electrode group 2 made thicker is accommodated in battery case 6, and a predetermined amount of electrolyte is injected into this,
Thereafter, a sealed alkaline storage battery was obtained in the same manner as in Example 1.
【００１５】尚、上記のように、極板群２の該中間域部
Ｍに重合介在させた２枚のセパレータシート５Ｌ，５Ｌ
は、互いに予め貼り合わせて一体としたものを介在する
ようにしても良い。また、必要に応じ、その３枚以上を
重合介在させても良い。この場合、極板群２の該前域部
Ｆ及び該後域部Ｒに介在させるセパレータシート５Ｌの
枚数は、それより少なくとも１枚少なく介在させる。As described above, the two separator sheets 5L, 5L overlapped in the intermediate region M of the electrode plate group 2.
May be interposed in such a manner that they are bonded together in advance and integrated. If necessary, three or more of them may be polymerized. In this case, the number of the separator sheets 5L interposed between the front region F and the rear region R of the electrode plate group 2 is at least one less than that.
【００１６】また、図５示の実施の態様の変形例とし
て、図示しないが、極板群２の該中間域部Ｍに位置する
各正，負極板３，４間に介在せしめるリーフ状セパレー
タとして、図６（ａ）示のリーフ状セパレータ５Ｌの厚
さｔよりも厚い、図６（ｃ）示の厚さＴを有するリーフ
状セパレータシート５Ｌ′を介在させる一方、その前域
部Ｆ及び後域部に夫々位置する各正，負極板３，４間に
は、図６（ａ）示のリーフ状セパータシート５Ｌを介在
させて極板群を構成し、これを電槽１内に収容し、電解
液を注入し、以上最初の実施例と同様にしてアルカリ蓄
電池を構成するようにしても良いことは言うまでもな
い。As a modified example of the embodiment shown in FIG. 5, although not shown, a leaf-shaped separator interposed between the positive and negative electrode plates 3, 4 located in the intermediate region M of the electrode plate group 2 is provided. 6A, a leaf-shaped separator sheet 5L 'having a thickness T shown in FIG. 6C which is thicker than the thickness t of the leaf-shaped separator 5L shown in FIG. An electrode group is formed between each of the positive and negative electrodes 3 and 4 located in the region by interposing a leaf-shaped separator sheet 5L shown in FIG. It goes without saying that an electrolyte may be injected and an alkaline storage battery may be formed in the same manner as in the first embodiment.
【００１７】上記したリーフ状セパレータ５Ｌ，５Ｌ′
を用いて本発明のアルカリ蓄電池を構成した場合も、先
のじぐざぐ状セパレータ５，５′を用いた場合と同様の
作用、効果をもたらす。The leaf-shaped separators 5L, 5L 'described above.
When the alkaline storage battery of the present invention is constituted by using the same, the same operation and effect as those when the jagged separators 5, 5 'are used are obtained.
【００１８】[0018]
【実施例】本発明の更に詳細な実施例を従来例と対比し
説明する。正極板と負極板を夫々次のように製造し、そ
の多数枚を用意した。即ち、縦１６０ｍｍ×横７０ｍ
ｍ、厚み１．４ｍｍの気孔率９５％の多孔体基板の一角
の縦１２ｍｍ×横２２ｍｍを、厚み０．２ｍｍにプレス
圧縮した後、この多孔体基板に水酸化ニッケル、金属ニ
ッケル粉、コバルト酸化物をＣＭＣの水溶液と共に混練
したペーストを充填した。この充填板を乾燥後、ロール
プレス機で０．７ｍｍに厚み調整し、Ｎｉ極板を得た。
これに上記プレス圧縮部に縦６０ｍｍ×横２０ｍｍ、３
ｚｎ０．２ｍｍの電流取出し用リード片をスポット溶接
して取り付けた。また、厚み０．０６ｍｍ、開孔率３５
％の多孔板に、水素吸蔵合金、フッ素系樹脂をＣＭＣ水
溶液と共に混練したスラリーを塗布・乾燥し、プレスに
より厚みを０．５ｍｍに調整し、熱処理を行い、フッ素
系樹脂粒子を相互結着した。この極板を耳部縦５０ｍｍ
×横２０ｍｍ、極板部縦１６０ｍｍ×横７０ｍｍに打ち
抜いて、水素吸蔵合金極板を得た。これに前記と同様の
電流取出し用リード片をスポット溶接し取り付けた。 実施例１ 幅１６６ｍｍ、厚み０．１６ｍｍ、長さ２３００ｍｍの
微多孔性シートから成る長尺の帯状セパレータの両端よ
り８６２ｍｍあけた中間帯域部に、幅１６６ｍｍ、厚み
０．１６ｍｍ、長さ５７６ｍｍの帯状セパレータを貼り
付け、中間部が長さ５７６ｍｍの二重のセパレータシー
トから成る厚さ０．３２ｍｍの中間帯部と長さが夫々８
６２ｍｍ、厚さ０．１６ｍｍの前帯域部と後帯域部をも
つ長尺の帯状セパレータを用意した。このセパレータを
じぐざぐ状に折り曲げ、これを介して上記のＭＨ極板１
５枚及びＮｉ極板１４枚を交互に積層して極板群の中間
域部にじぐざぐ状の長尺の帯状セパレータの中間帯域部
を介在せしめるようにして極板群を構成し、これを大形
の角形電槽に収容し、ＫＯＨを主成分とする比重１．３
のアルカリ電解液を１３２ｃｃ注入し、図１示と同じ構
成の電池を組立てた後、常法により気密に施蓋して６０
ＡＨ級角形密閉ニッケル水素電池を作製した。 実施例２ 幅１６６ｍｍ、厚み０．２４ｍｍ、長さ１１５０ｍｍの
微多孔性シートから成る長尺の帯状セパレータのその長
さ方向の両側に、幅１６６ｍｍ、厚み０．１６ｍｍ、長
さ５８０ｍｍの微多孔性シートから成る２枚の帯状セパ
レータの対向端を５ｍｍ重ねて熱融着し、厚み０．２４
ｍｍの中間帯状部の帯状セパレータとその両端に夫々厚
み０．１６ｍｍの前帯域部の帯状セパレータと後帯域部
の帯状セパレータとから成る全長２３００ｍｍのセパレ
ータを用意した。このセパレータをじぐざぐ状に折り曲
げ、これを介して上記のＭＨ極板１５枚及びＮｉ極板１
４枚を交互に積層して極板群の中間域部にじぐざぐ状の
長尺の帯状セパレータの中間帯域部を介在せしめるよう
にして極板群を構成し、これを大形の角形電槽に収容
し、ＫＯＨを主成分とする比重１．３のアルカリ電解液
を１３２ｃｃ注入し、図３示と同じ構成の電池を組立て
た後、常法により気密施蓋して６０ＡＨ級角形密閉Ｎｉ
ＭＨ電池を作製した。 従来例 幅１６６ｍｍ、厚み０．２０ｍｍ、長さ２３００ｍｍの
微多孔性シートから成る長尺の帯状セパレータをじぐざ
ぐ状に折り曲げ、これを介して上記ＭＨ極板１５枚、Ｎ
ｉ極板１４枚を交互に積層して極板群を構成し、これを
大形の角形電槽に収容し、ＫＯＨを主成分とする比重
１．３のアルカリ電解液を１３２ｃｃ注入し、図９示と
同じ構成の電池を組立てた後、常法により気密に施蓋し
て６０ＡＨ級角形密閉ＮｉＭＨ電池を作製した。DESCRIPTION OF THE PREFERRED EMBODIMENTS A more detailed embodiment of the present invention will be described in comparison with a conventional example. A positive electrode plate and a negative electrode plate were manufactured as follows, respectively, and a large number of them were prepared. That is, height 160mm x width 70m
m, one side of a porous substrate having a porosity of 95% and a porosity of 95% and a width of 12 mm × width of 22 mm were press-compressed to a thickness of 0.2 mm, and then nickel hydroxide, metallic nickel powder, and cobalt oxide were applied to the porous substrate. The mixture was filled with a paste obtained by kneading the mixture with an aqueous solution of CMC. After the filling plate was dried, the thickness was adjusted to 0.7 mm with a roll press machine to obtain a Ni electrode plate.
Then, the above-mentioned press compression section is 60 mm long x 20 mm wide, 3
A lead piece for extracting current with a thickness of 0.2 mm was spot-welded and attached. Further, the thickness is 0.06 mm, and the porosity is 35.
% Of a perforated plate, a slurry obtained by kneading a hydrogen storage alloy and a fluororesin together with a CMC aqueous solution was applied and dried, the thickness was adjusted to 0.5 mm by pressing, heat treatment was performed, and the fluororesin particles were interconnected. . This electrode plate is 50mm long
× 20 mm in width and 160 mm in length × 70 mm in width in the electrode plate portion to obtain a hydrogen storage alloy electrode plate. The same current extraction lead piece as above was spot-welded to this and attached. Example 1 A strip having a width of 166 mm, a thickness of 0.16 mm, and a length of 576 mm was provided at an intermediate zone portion 862 mm apart from both ends of a long strip separator made of a microporous sheet having a width of 166 mm, a thickness of 0.16 mm, and a length of 2300 mm. A separator is attached, and the middle part is a 0.32 mm-thick intermediate band composed of a double separator sheet having a length of 576 mm and the length is 8 parts each.
A long strip separator having a front zone and a rear zone with a thickness of 62 mm and a thickness of 0.16 mm was prepared. The separator is bent in a zigzag manner, and the MH plate 1
Five electrode plates and 14 Ni electrode plates are alternately stacked to form an electrode plate group in such a manner that an intermediate band portion of a long strip-like long strip separator is interposed in an intermediate region portion of the electrode plate group. It is housed in a large rectangular battery case and has a specific gravity of 1.3 as a main component containing KOH.
132 cc of the alkaline electrolyte is injected, and a battery having the same structure as that shown in FIG. 1 is assembled.
An AH-class square sealed nickel-metal hydride battery was produced. Example 2 A microporous sheet having a width of 166 mm, a thickness of 0.16 mm and a length of 580 mm was provided on both sides in the length direction of a long strip-shaped separator composed of a microporous sheet having a width of 166 mm, a thickness of 0.24 mm and a length of 1150 mm. The opposite ends of the two band-shaped separators made of sheets are overlapped with each other by 5 mm and heat-sealed to obtain a thickness of 0.24
A 2300 mm separator having a total length of 2 mm, comprising a 0.16 mm thick band separator in the front band and a band separator in the rear band having a thickness of 0.16 mm at both ends thereof. The separator was bent in a zigzag manner, and the 15 MH plates and the 1
An electrode group is formed by alternately stacking four sheets so as to interpose an intermediate band portion of a long strip-shaped long separator in the middle region portion of the electrode group, and this is used as a large rectangular battery case. , And 132 cc of an alkaline electrolyte containing KOH as a main component and having a specific gravity of 1.3 was injected, and a battery having the same configuration as that shown in FIG. 3 was assembled.
An MH battery was manufactured. Conventional Example A long strip-shaped separator made of a microporous sheet having a width of 166 mm, a thickness of 0.20 mm and a length of 2300 mm is bent in a zigzag manner, and the 15 MH electrode plates and N
14 electrode plates are alternately stacked to form a group of electrode plates, which is accommodated in a large rectangular battery case, and 132 cc of an alkaline electrolyte containing KOH as a main component and having a specific gravity of 1.3 is injected. After assembling the battery having the same configuration as shown in FIG. 9, the battery was airtightly covered by a conventional method to produce a 60 AH class square sealed NiMH battery.
【００１９】上記のようにして得た実施例１、実施例２
及び従来例の密閉アルカリ蓄電池の夫々の多数個を−２
０℃、０℃、２０℃、４０℃、６０℃において３Ａで３
０時間充電し、２０℃において１２Ａで１Ｖまで放電
し、各々の容量を求めた。その結果を図７に示す。ま
た、２０℃で１２Ａで５．５Ｈ充電、２０Ａで２．２５
Ｈ放電する充放電サイクル試験を行い、１００サイクル
に一度、３Ａで３０Ｈ充電し、１２Ａで１Ｖまで放電
し、各々の容量を求めた。その結果を図８に示す。尚、
上記実施例１、実施例２及び従来例との極板群に占める
セパレータの体積はほゞ同一である。Example 1 and Example 2 obtained as described above
And a large number of each of the conventional sealed alkaline storage batteries is -2
3 ° C at 0 ° C, 0 ° C, 20 ° C, 40 ° C, 60 ° C
The battery was charged for 0 hour, discharged at 1 A at 12 A to 1 V at 20 ° C., and the respective capacities were determined. FIG. 7 shows the result. Also, 5.5H charge at 12A at 20 ° C and 2.25 at 20A.
A charge / discharge cycle test for H-discharge was performed, and once every 100 cycles, the battery was charged at 3 A for 30 H and discharged at 12 A to 1 V, and the capacity of each battery was determined. FIG. 8 shows the result. still,
The volume of the separator occupying the electrode group in the first, second and conventional examples is almost the same.
【００２０】図７及び図８から明らかなように、実施例
１、２の本発明の電池は、高温での充電効率が従来の電
池に比し著しく向上し、また、サイクル寿命も従来の電
池に比し著しく改善することが分かる。尚、各電池の寿
命は、液涸れが原因であった。As is clear from FIGS. 7 and 8, the batteries of the present invention of Examples 1 and 2 have significantly improved charging efficiency at high temperatures as compared with the conventional batteries, and have a cycle life of the conventional batteries. It can be seen that it is significantly improved as compared with The life of each battery was due to drying out.
【００２１】因みに、従来例で使用した長尺の帯状セパ
レータの半分の厚みのセパレータを全長に亘り２枚重ね
たものを、実施例１の極板群にじぐざぐ状に折り曲げ介
在させて極板群を構成し、その中間域部に位置する各
正，負極板間に介在させたセパレータの厚さとその前域
部及び後域部に位置する各正，負極板間に介在させたセ
パレータの厚さとを同じに構成した場合は、本発明の上
記の効果は得られなかった。By the way, two separators each having a half thickness of the long strip separator used in the conventional example are stacked over the entire length, and are bent in a zigzag manner in the electrode plate group of the first embodiment so as to be interposed therebetween. The thickness of the separator interposed between the positive and negative plates located in the intermediate region and the thickness of the separator interposed between the positive and negative plates located in the front and rear regions. In the case of the same configuration, the above effects of the present invention could not be obtained.
【００２２】[0022]
【発明の効果】このように本発明によるときは、極板群
として、その中間域部における各正，負極板間に介在さ
せるセパレータの厚さを、その前域部及び後域部の夫々
における各正，負極板間に介在させるセパレータの厚さ
より厚くしたものを介在させた極板群を構成し、これを
電槽内に収容し、アルカリ電解液を注入して得られるア
ルカリ蓄電池は、高温における充電効率が向上し、電池
寿命の延長をもたらす。As described above, according to the present invention, as the electrode plate group, the thickness of the separator interposed between the positive and negative electrode plates in the intermediate region is adjusted in the front region and the rear region, respectively. An electrode plate group is formed by interposing a separator thicker than the separator between the positive and negative plates, and is housed in a battery case, and an alkaline storage battery obtained by injecting an alkaline electrolyte is a high temperature battery. , The charging efficiency is improved, and the battery life is prolonged.
【図１】 本発明の実施の１例のアルカリ蓄電池の模式
平面図。FIG. 1 is a schematic plan view of an alkaline storage battery according to one embodiment of the present invention.
【図２】 図１示のアルカリ蓄電池に使用した長尺の帯
状セパレータの斜視図。FIG. 2 is a perspective view of a long strip separator used in the alkaline storage battery shown in FIG. 1;
【図３】 本発明の他の実施例のアルカリ蓄電池の模式
平面図。FIG. 3 is a schematic plan view of an alkaline storage battery according to another embodiment of the present invention.
【図４】 図３示のアルカリ蓄電池に使用した長尺の帯
状セパレータの斜視図。FIG. 4 is a perspective view of a long strip separator used in the alkaline storage battery shown in FIG. 3;
【図５】 本発明の更に他の実施例のアルカリ蓄電池の
模式平面図。FIG. 5 is a schematic plan view of an alkaline storage battery according to still another embodiment of the present invention.
【図６（ａ），（ｂ）及び（ｃ）】 図５示のアルカリ
蓄電池に使用したリーフ状セパレータの斜視図。6 (a), 6 (b) and 6 (c) are perspective views of a leaf-shaped separator used in the alkaline storage battery shown in FIG.
【図７】 密閉アルカリ蓄電池の充電特性を示すグラ
フ。FIG. 7 is a graph showing charging characteristics of a sealed alkaline storage battery.
【図８】 密閉アルカリ蓄電池の充放電サイクル特性を
示すグラフ。FIG. 8 is a graph showing charge / discharge cycle characteristics of a sealed alkaline storage battery.
【図９】 従来のアルカリ蓄電池の模式平面図。FIG. 9 is a schematic plan view of a conventional alkaline storage battery.
【図１０】 図９示のアルカリ蓄電池に使用した長尺の
帯状セパレータの斜視図。FIG. 10 is a perspective view of a long strip separator used in the alkaline storage battery shown in FIG. 9;
１ アルカリ蓄電池 ２ 極板群 ３ 正極板 ４ 負極板 ５，５ 長尺の帯状セパレータ ５ａ 長尺の帯
状セパレータシート ５ｂ，５ｃ，５ｄ 帯状セパレータシート ５Ｌ、５Ｌ′ リーフ状セパレータ，リーフ状セパレー
タシート ６ 角形電槽 Ｍ 極板群の中
間域部 Ｆ 極板群の前域部 Ｒ 極板群の後
域部 ｍ 長尺の帯状セパレータの中間帯域部 ｆ 長尺の帯状セパレータの前帯域部 ｒ 長尺の帯状
セパレータの後帯域部DESCRIPTION OF SYMBOLS 1 Alkaline storage battery 2 Electrode group 3 Positive electrode plate 4 Negative electrode plate 5, 5 Long strip separator 5a Long strip separator sheet 5b, 5c, 5d Strip separator sheet 5L, 5L 'Leaf separator, leaf separator sheet Hexagon Battery case M Middle area of electrode group F Front area of electrode group R Rear area of electrode group m Middle band of long strip separator f Front band of long strip separator r Long band Rear band of band-shaped separator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 永野 貢 宮城県仙台市青葉区中山７丁目２番１号 東北電力株式会社研究開発センター内 (72)発明者 佐藤 文夫 宮城県仙台市青葉区中山７丁目２番１号 東北電力株式会社研究開発センター内 (72)発明者 小山 健 宮城県仙台市青葉区中山７丁目２番１号 東北電力株式会社研究開発センター内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Mitsuru Nagano 7-2-1, Nakayama, Aoba-ku, Sendai City, Miyagi Prefecture Inside the R & D Center of Tohoku Electric Power Co., Inc. (72) Fumio Sato 7 Nakayama, Aoba-ku, Sendai City, Miyagi Prefecture (2-1) Inventor Ken Koyama 7-2-1, Nakayama, Aoba-ku, Aoba-ku, Sendai-shi, Miyagi Pref.
Claims (7)
を介して交互に積層して成る極板群を電槽内に収容し、
且つアルカリ電解液を注入して成るアルカリ蓄電池にお
いて、該極板群の積層方向における中間域部に位置する
各正，負極板間に介在するセパレータの厚さを、その前
域部及び後域部に位置する各正，負極板間に介在するセ
パレータの厚さより厚くしたことを特徴とするアルカリ
蓄電池。An electrode group comprising a large number of positive plates and negative plates alternately stacked via a separator is accommodated in a battery case.
In addition, in an alkaline storage battery obtained by injecting an alkaline electrolyte, the thickness of the separator interposed between the positive and negative electrodes located in the intermediate region in the stacking direction of the electrode plate group is adjusted to the front region and the rear region. An alkaline storage battery characterized in that the thickness is greater than the thickness of a separator interposed between each of the positive and negative electrode plates.
折り曲げた長尺の帯状セパレータを介して交互に積層し
て成る極板群を構成するに当たり、該長尺の帯状セパレ
ータとしてその長さ方向における中間帯域部のセパレー
タの厚さをその前帯域部及び後帯域部のセパレータの厚
さより厚くして成るものを用い、これをじぐざぐ状に折
り曲げて、該極板群の中間域部に位置する各正，負極板
間に介在するセパレータを、その該中間帯域部で構成
し、その前域部及び後域部に位置する各正，負極板間に
介在するセパレータを、その前帯域部及び後帯域部で夫
々構成したことを特徴とする請求項１記載のアルカリ蓄
電池。2. A method of forming an electrode plate group comprising a plurality of positive and negative electrode plates alternately laminated via long strip-shaped separators bent in a zigzag manner. Using a separator having a thickness of the intermediate zone in the length direction larger than the thickness of the separators in the front zone and the rear zone, and bending it in a zigzag manner, the intermediate zone of the electrode group The separator interposed between the positive and negative plates located in the middle portion is constituted by the intermediate band portion, and the separator interposed between the positive and negative plates located in the front region and the rear region is disposed in front of the intermediate region. 2. The alkaline storage battery according to claim 1, wherein the alkaline storage battery includes a band portion and a rear band portion.
レータを介して交互に積層して成る極板群を構成するに
当たり、該極板群の中間域部に位置する各正，負極板間
に介在せしめるリーフ状セパレータシートの厚さが、そ
の前域部及び後域部に位置する各正，負極板間に介在せ
しめるリーフ状セパレータシートの厚さより厚いものを
使用したことを特徴とする請求項１記載のアルカリ蓄電
池。3. A positive and negative electrode plate located in an intermediate region of the electrode plate group when a plurality of positive electrode plates and negative electrode plates are alternately laminated via a leaf-shaped separator. The thickness of the leaf-shaped separator sheet interposed therebetween is larger than the thickness of the leaf-shaped separator sheet interposed between the positive and negative plates located in the front region and the rear region. The alkaline storage battery according to claim 1.
１枚の長尺の帯状セパレータシートの長さ方向の中間帯
域部に、少なくとも１枚の帯状セパレータシートを貼着
して構成したことを特徴とする請求項２記載のアルカリ
蓄電池。4. The long band-shaped separator is characterized in that at least one long band-shaped separator sheet is attached to an intermediate band portion in a longitudinal direction of at least one long band-shaped separator sheet. The alkaline storage battery according to claim 2, wherein
域部を構成すべき帯状セパレータシートの厚さを、その
前域部及び後域部を構成すべき帯状セパレータシートの
厚さより厚いものを使用し、その両端を、前記の前域部
及び後域部を構成すべき帯状セパレータシートの対向す
る内端に接続して成る請求項２記載のアルカリ蓄電池。5. The long strip separator, wherein the thickness of the strip separator sheet forming the intermediate zone is larger than the thickness of the strip separator sheet forming the front and rear zones. 3. The alkaline storage battery according to claim 2, wherein both ends thereof are connected to opposing inner ends of the strip-shaped separator sheet to form the front region and the rear region.
負極板間に介在せしめるリーフ状セパレータシートの枚
数を、その前域部及び後域部の各正，負極板間に介在せ
しめるリーフ状セパレータシートの枚数より少なくとも
１枚多く介在せしめて成る請求項３記載のアルカリ蓄電
池。6. The positive and negative electrode groups located in the intermediate region of the electrode group.
4. The method according to claim 3, wherein the number of leaf-like separator sheets interposed between the negative electrode plates is at least one more than the number of leaf-like separator sheets interposed between the positive and negative electrode plates in the front region and the rear region. The alkaline storage battery according to the above.
負極板間に介在せしめるリーフ状セパレータシートは、
その前域部及び後域部に位置する各正，負極板間に介在
せしめるリーフ状セパレータのシートより肉厚のものを
介在せしめて成る請求項３記載のアルカリ蓄電池。7. Each positive and negative electrode located in the intermediate region of the electrode group.
The leaf-shaped separator sheet interposed between the negative electrode plates is
4. The alkaline storage battery according to claim 3, wherein a sheet having a greater thickness than a leaf-like separator sheet interposed between the positive and negative electrode plates located in the front region and the rear region is interposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8172914A JPH103938A (en) | 1996-06-12 | 1996-06-12 | Alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8172914A JPH103938A (en) | 1996-06-12 | 1996-06-12 | Alkaline storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH103938A true JPH103938A (en) | 1998-01-06 |
Family
ID=15950695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8172914A Pending JPH103938A (en) | 1996-06-12 | 1996-06-12 | Alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH103938A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008159330A (en) * | 2006-12-21 | 2008-07-10 | Toyota Motor Corp | Electricity storage device |
-
1996
- 1996-06-12 JP JP8172914A patent/JPH103938A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008159330A (en) * | 2006-12-21 | 2008-07-10 | Toyota Motor Corp | Electricity storage device |
| US8124265B2 (en) | 2006-12-21 | 2012-02-28 | Toyota Jidosha Kabushiki Kaisha | Power storage device |
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