JP3056520B2 - Alkaline storage battery - Google Patents
Alkaline storage batteryInfo
- Publication number
- JP3056520B2 JP3056520B2 JP2338988A JP33898890A JP3056520B2 JP 3056520 B2 JP3056520 B2 JP 3056520B2 JP 2338988 A JP2338988 A JP 2338988A JP 33898890 A JP33898890 A JP 33898890A JP 3056520 B2 JP3056520 B2 JP 3056520B2
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- electrode
- thickness
- electrode body
- tan
- 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.)
- Expired - Fee Related
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、渦巻状電極体を用いるアルカリ蓄電池に係
り、さらに詳しくはその渦巻状電極体の改良に関する。Description: TECHNICAL FIELD The present invention relates to an alkaline storage battery using a spiral electrode body, and more particularly to an improvement of the spiral electrode body.
アルカリ蓄電池においては、反応面積を広くするた
め、正極と負極とをセパレータを介して重ね合わせ、渦
巻状に巻回して渦巻状電極体にし、この渦巻状電極体を
金属外装缶内に収納している（例えば、特開平１−1320
66号公報）。In an alkaline storage battery, in order to increase the reaction area, a positive electrode and a negative electrode are overlapped via a separator, spirally wound into a spiral electrode body, and the spiral electrode body is housed in a metal outer can. (For example, see JP-A-1-1320)
No. 66).
しかしながら、渦巻状電極体では、その横断面形状が
真円にならず、最外周部の負極の端部の外周面側が径方
向外方側に突出しているため、渦巻状電極体を金属外装
缶内に収納する際に、その突出部分が金属外装缶の開口
端に引っかかってスムーズな収納ができず、また、それ
が短絡発生を引き起こす原因になる。However, in the spiral electrode body, the cross-sectional shape does not become a perfect circle, and the outer peripheral surface side of the end of the negative electrode at the outermost periphery protrudes outward in the radial direction. When it is stored inside, the protruding portion is caught by the opening end of the metal outer can, so that smooth storage cannot be performed, and that causes a short circuit.
本発明は、渦巻状電極体の最外周部の負極の端部の外
周面側のみに0.00063≦tanθ≦１の傾斜を持たせること
により、渦巻状電極体の金属外装缶内への収納を容易に
し、それによって、短絡の発生を低減し、歩留りを向上
させたものである。The present invention facilitates the storage of the spiral electrode body in the metal outer can by giving a slope of 0.00063 ≦ tanθ ≦ 1 only to the outer peripheral surface of the end of the negative electrode at the outermost periphery of the spiral electrode body. Thus, the occurrence of short circuits is reduced, and the yield is improved.
上記のように渦巻状電極体の最外周部の負極の端部の
外周面側のみに0.00063≦tanθ≦１の傾斜を持たせるこ
とによって、最外周部の負極の端部の外周面側の突出が
少なくなり、金属外装缶内への収納時に渦巻状電極体が
金属外装缶の開口端に引っかかることが少なくなって、
金属外装缶内への収納が容易になり、また、短絡の発生
が防止されるようになる。また、本発明においては、負
極の最外周部の先端部の厚みを薄くするにあたって後に
詳述するように特定の態様で薄くしているので、電池反
応に支障を来すことがない。As described above, only the outer peripheral surface of the end portion of the negative electrode at the outermost peripheral portion of the spiral electrode body has a slope of 0.00063 ≦ tanθ ≦ 1, thereby protruding the outer peripheral surface side of the end portion of the negative electrode at the outermost peripheral portion. The spiral electrode body is less likely to be caught on the open end of the metal outer can when being stored in the metal outer can,
This facilitates storage in a metal outer can and prevents occurrence of a short circuit. Further, in the present invention, since the thickness of the distal end portion of the outermost peripheral portion of the negative electrode is reduced in a specific mode as described later in detail, there is no hindrance to the battery reaction.
本発明において、渦巻状電極体の最外周部の負極の端
部の外周面側のみに持たせる傾斜の程度としては、0.00
063≦tanθ≦１の範囲にすることが必要である。その理
由およびtanθの取り方については、次の実施例の項に
おいて図面を参照しつつ詳しく説明するが、tanθが0.0
0063より小さい場合は、傾斜が小さすぎるため、最外周
部の負極の端部の外周面側の突出を少なくする効果が充
分に発揮されず、また、tanθが１より大きくなると、
傾斜を持たせた部分の長さが短くなり、金属外装缶内へ
の収納時に渦巻状電極体の最外周部の負極の外周面側が
金属外装缶の開口端に引っかかり、負極活物質が脱落し
て短絡を発生させるのを防止する効果が充分に発揮でき
ないからである。In the present invention, the degree of inclination provided only on the outer peripheral surface side of the end portion of the negative electrode at the outermost peripheral portion of the spiral electrode body is 0.00
It is necessary to set the range of 063 ≦ tan θ ≦ 1. The reason for this and how to take tan θ will be described in detail in the section of the next embodiment with reference to the drawings.
When the value is smaller than 0063, the inclination is too small, so that the effect of reducing the protrusion of the outer peripheral surface side of the end portion of the negative electrode at the outermost peripheral portion is not sufficiently exerted.
The length of the sloped part is shortened, and the outer peripheral surface of the negative electrode at the outermost periphery of the spiral electrode body is caught by the opening end of the metal outer can when stored in the metal outer can, and the negative electrode active material falls off This is because the effect of preventing the occurrence of short circuit cannot be sufficiently exhibited.
本発明において、正極には金属酸化合物または金属水
酸化物を含むシート状の成形体が用いられるが、この金
属酸化物としては、例えば二酸化マンガン、酸化銀など
が挙げられ、また、金属水酸化物としては、例えば水酸
化ニッケルなどが挙げられる。In the present invention, a sheet-like molded body containing a metal acid compound or a metal hydroxide is used for the positive electrode. Examples of the metal oxide include manganese dioxide and silver oxide. Examples of the material include nickel hydroxide.
また、負極には水酸化カドミウムまたは金属水素化物
を含むシート状の成形体が用いられるが、この金属水素
化物としては、例えばLaNi5系、MmNi5系、TiNi系などの
水素貯蔵合金などが挙げられる。In addition, a sheet-shaped molded body containing cadmium hydroxide or metal hydride is used for the negative electrode.Examples of the metal hydride include LaNi 5- based, MmNi 5- based, and TiNi-based hydrogen storage alloys. Can be
第１図は渦巻状電極体の横断面図であり、第２図は第
１図に示す渦巻状電極体の最外周部の端部の要部拡大横
断面図で、第３図はアルカリ蓄電池の一例を示す縦断面
図である。FIG. 1 is a cross-sectional view of a spiral electrode body, FIG. 2 is an enlarged cross-sectional view of a main part of an outermost end of the spiral electrode body shown in FIG. 1, and FIG. 3 is an alkaline storage battery. It is a longitudinal cross-sectional view which shows an example.
まず、第１図に基づき渦巻状電極体について説明する
と、（１）は正極、（２）は負極、（３）はセパレータ
である。正極（１）は、一般にニッケル電極と呼ばれて
いるもので、水酸化ニッケルを活物質として含むシート
状の成形体からなり、負極（２）は、一般にカドミウム
電極と呼ばれているものであって、水酸化カドミウムを
活物質として含むシート状の成形体からなるものであ
る。そして、セパレータ（３）はポリアミド不織布から
なり、上記正極（１）と負極（２）はセパレータ（３）
を介して重ね合わせ、渦巻状に巻回されて、渦巻状電極
体（11）にされている。First, the spiral electrode body will be described with reference to FIG. 1. (1) is a positive electrode, (2) is a negative electrode, and (3) is a separator. The positive electrode (1) is generally called a nickel electrode, and is formed of a sheet-like molded body containing nickel hydroxide as an active material. The negative electrode (2) is generally called a cadmium electrode. And a sheet-like molded body containing cadmium hydroxide as an active material. The separator (3) is made of a polyamide non-woven fabric, and the positive electrode (1) and the negative electrode (2) are
And are spirally wound to form a spiral electrode body (11).
上記渦巻状電極体（11）の最外周部（12）は、負極
（２）によって構成されているが、第２図に詳示するよ
うに、この負極（２）の端部（13）の外周面側には傾斜
を持たせてあり、この傾斜角度θのtanθは0.00063から
１の範囲になるように設定されている。ただし、渦巻状
電極体（11）の最内周部には傾斜を設けない。The outermost peripheral portion (12) of the spiral electrode body (11) is constituted by a negative electrode (2). As shown in detail in FIG. 2, an end (13) of the negative electrode (2) is formed. The outer peripheral surface side is inclined, and the tan θ of the inclination angle θ is set to be in the range of 0.00063 to 1. However, no inclination is provided at the innermost periphery of the spiral electrode body (11).
上記のように、0.00063≦tanθ≦１にする理由は、上
記渦巻状電極体（11）を用いて第３図に示すニッケル−
カドミウム系のアルカリ蓄電池を組立て、その短絡発生
率を調べ、それによって良品数の歩留りを調べた結果に
よるものである。As described above, the reason for setting 0.00063 ≦ tanθ ≦ 1 is that the spiral electrode body (11) is used for the nickel-electrode shown in FIG.
This is based on the result of assembling a cadmium-based alkaline storage battery and examining the short-circuit occurrence rate thereof, thereby examining the yield of good products.
すなわち、第２図に示すＬに対するＷの比率（W/
L）、つまり、tanθを変化させた各種渦巻状電極体（1
1）を各1,000個ずつ作製し、それを金属外装缶内に収納
し、常方に準じて封口処理をして電池を作製し、短絡発
生の有無を調べ、それによって短絡発生のない良品数が
得られる歩留りを求め、その結果から、tanθを上記範
囲に定めたものである。That is, the ratio of W to L shown in FIG. 2 (W /
L), that is, various spiral electrode bodies (1
1) For each 1,000 pieces, put them in a metal outer can, seal them according to the usual way, make a battery, and check for the occurrence of short circuit. Is obtained, and from the result, tan θ is set in the above range.
第３図に示す電池について説明すると、上記渦巻状電
極体（11）は金属外装缶（４）内に収納され、正極
（１）はリード体（５）によって封口板（６）の下側部
分（6b）に接続され、負極（２）はリード体（７）によ
って金属外装缶（４）に接続されている。負極（２）と
リード体（５）との接続は負極（２）の基体のはみ出し
部分（2a）（はみ出し部分とは、活物質である水酸化カ
ドミウムが付着していない部分をいう）によって行われ
ている。Referring to the battery shown in FIG. 3, the spiral electrode body (11) is housed in a metal outer can (4), and the positive electrode (1) is connected to a lower part of a sealing plate (6) by a lead body (5). (6b), and the negative electrode (2) is connected to the metal outer can (4) by a lead body (7). The connection between the negative electrode (2) and the lead body (5) is established by a protruding portion (2a) of the base of the negative electrode (2) (the protruding portion means a portion to which cadmium hydroxide as an active material is not attached). Have been done.
封口板（６）は、上側部分（6a）と下側部分（6b）と
からなり、下側部分（6b）にはガス検知孔（6c）が設け
られ、上側部分（6a）にはガス排出孔（6d）が設けら
れ、かつ上側部分（6a）と下側部分（6b）との間には金
属バネ（８）と閉塞部材（９）とが配設されていて、電
池内部にガスが発生して、電池の内部圧力が異常に上昇
したときは、金属バネ（８）が収縮し閉塞部材（９）が
上昇して下側部分（6b）との間に隙間をつくり、電池内
部のガスを電池外部に排出して電池の高圧下での破裂を
防止できるようになっている。The sealing plate (6) is composed of an upper part (6a) and a lower part (6b), a gas detection hole (6c) is provided in the lower part (6b), and a gas exhaust is provided in the upper part (6a). A hole (6d) is provided, and a metal spring (8) and a closing member (9) are provided between the upper part (6a) and the lower part (6b), so that gas is supplied inside the battery. When the internal pressure of the battery rises abnormally, the metal spring (8) contracts and the closing member (9) rises to create a gap between the lower portion (6b) and the inside of the battery. Gas can be discharged outside the battery to prevent the battery from bursting under high pressure.
金属外装缶（４）と封口板（６）との間には絶縁パッ
キング（10）が配設され、金属外装缶（４）の開口部
は、該金属外装缶（４）の開口端部の内方への締め付け
により、上記絶縁パッキング（10）と封口板（６）とで
封口されている。また、この電池には30％水酸化カリウ
ム水溶液が電解液として注入されている。An insulating packing (10) is provided between the metal outer can (4) and the sealing plate (6), and the opening of the metal outer can (4) is located at the opening end of the metal outer can (4). The inside is closed by the insulating packing (10) and the sealing plate (6) by being tightened inward. Further, a 30% aqueous solution of potassium hydroxide was injected into the battery as an electrolyte.
第２図に示すＬに対するＷの比率（つまり、tanθ）
を変化させて渦巻状電極体（11）を作製し、短絡発生率
を調べた結果を第４図に示す。The ratio of W to L shown in FIG. 2 (that is, tan θ)
The spiral electrode body (11) was produced by changing the values of the above, and the short-circuit occurrence rate was examined. The result is shown in FIG.
第４図に示すように、tanθが０の場合（第４図のＡ
点）はまったく傾斜を持たせていない場合を示すが、こ
の場合は13％の短絡発生率が認められた。しかし、tan
θが0.00063（第４図のＢ点）になると、短絡発生率が
5.3％に減少し、tanθが0.04（第４図のＣ点）になる
と、短絡発生率が4.5％と、５％以下になり、さらに、t
anθが0.2（第４図のＤ点）になると短絡発生率が3.5％
になり、以後、tanθが0.4（第４図のＥ点）になるまで
は短絡発生率がほぼ同一で、さらにtanθが増加すると
短絡発生率が徐々に増加し、tanθが0.56（第４図のＦ
点）では短絡発生率が4.1％になり、tanθが１（第４図
のＧ点）になると、短絡発生率が７％と、傾斜を持たせ
ていない場合の約1/2になり、さらにtanθが増加する
と、短絡発生率が増加した。As shown in FIG. 4, when tan θ is 0 (A in FIG. 4)
(Point) shows a case where no inclination is provided, and in this case, a short-circuit occurrence rate of 13% was observed. But tan
When θ becomes 0.00063 (point B in FIG. 4), the short-circuit occurrence rate becomes
When it decreases to 5.3% and tan θ becomes 0.04 (point C in FIG. 4), the short-circuit occurrence rate becomes 4.5%, 5% or less, and t
When anθ becomes 0.2 (point D in Fig. 4), the short-circuit occurrence rate becomes 3.5%
Thereafter, the short-circuit occurrence rate is substantially the same until tan θ becomes 0.4 (point E in FIG. 4). When the tan θ further increases, the short-circuit occurrence rate gradually increases, and tan θ becomes 0.56 (see FIG. 4). F
(Point), the short-circuit occurrence rate becomes 4.1%, and when tan θ becomes 1 (point G in FIG. 4), the short-circuit occurrence rate becomes 7%, which is about の of the case where no slope is provided, and As tan θ increased, the short circuit incidence increased.
この第４図に示す結果より明らかであるように、短絡
発生率を傾斜を持たせていない場合の半分以下に抑える
には、tanθを0.00063〜１の範囲に設定することが必要
であり、また、短絡発生率を５％以下（つまり、歩留り
として95％以上）にするためには、tanθを0.04〜0.56
の範囲にすることが必要である。As is clear from the results shown in FIG. 4, it is necessary to set tan θ in the range of 0.00063 to 1 in order to suppress the short-circuit occurrence rate to less than half of the case where no slope is provided. In order to reduce the short-circuit occurrence rate to 5% or less (that is, 95% or more in yield), tan θ is set to 0.04 to 0.56.
It is necessary to be within the range.
上記のように、tanθが大きくなると、最初は短絡発
生率が減少するが、ある一定値を過ぎると短絡発生率が
増加するには、Ｗの値とＬの値との差が少なくなって、
傾斜を持たせた部分の長さが短くなることによるものと
考えられる。As described above, when the tan θ increases, the short circuit occurrence rate decreases at first, but after a certain value, the difference between the value of W and the value of L decreases to increase the short circuit occurrence rate.
It is considered that the length of the inclined portion is shortened.
なお、渦巻状電極体（11）にした場合、電池反応は電
極の両面で行われるが、最外周部（12）の負極（２）〕
は、反応が片面でのみ進行するので、その端部（13）の
外周面側のみに傾斜を持たせることによって厚みが薄く
なっても、電池反応に大きな影響を及ぼすことがない。
すなわち、本発明においては、負極（２）の最外周部
（12）の先端部の厚みを薄くするにあたって、第２図に
示すように、削減する部分の厚みＷより残る部分の厚み
Ｙの方を厚くしているので、残っている部分の厚みＹは
厚みを薄くしていない部分の厚みＺの1/2以上の厚みが
あるため、その内周側にセパレータ（３）を介して配置
している正極（１）との反応に際して必要な量の負極
（２）が確保されているので、電池反応に支障を来すこ
とがない。In the case of the spiral electrode body (11), the battery reaction is performed on both sides of the electrode, but the negative electrode (2) at the outermost periphery (12)]
Since the reaction proceeds only on one side, the battery reaction is not significantly affected even if the thickness is reduced by giving a slope only to the outer peripheral surface of the end (13).
That is, in the present invention, when reducing the thickness of the tip of the outermost peripheral portion (12) of the negative electrode (2), as shown in FIG. Is thicker, the thickness Y of the remaining portion is at least half the thickness Z of the portion not reduced in thickness, so that it is disposed on the inner peripheral side thereof with the separator (3) interposed therebetween. Since a necessary amount of the negative electrode (2) is secured during the reaction with the positive electrode (1), the battery reaction is not hindered.
以上の実施例では、ニッケル−カドミウム系で水酸化
カリウム水溶液を電解液として用いたアルカリ蓄電池に
ついて説明したが、電池系としてはこれに限定されるも
のではなく、例えば、負極としては、LaNi5系、MmNi
5系、TiNi系などの水素貯蔵合金電極などを用いること
ができる。また、電極の製造方法も、プレス成形方式、
焼結方式、ペースト方式など、各種の方法が採用でき
る。In the above embodiments, nickel - although the aqueous solution of potassium hydroxide in cadmium has been described alkaline storage battery using as an electrolytic solution, is not limited to this as the battery system, for example, as the negative electrode, LaNi 5 type , MmNi
A hydrogen storage alloy electrode such as a 5- based or TiNi-based electrode can be used. Also, the manufacturing method of the electrode is a press molding method,
Various methods such as a sintering method and a paste method can be adopted.
以上説明したように、本発明では、渦巻状電極体（1
1）の最外周部（12）の負極（２）の端部（13）の外周
面側のみに0.00063≦tanθ≦１の傾斜を持たせ、かつ負
極（２）の最外周部（12）の先端部の厚みを薄くするに
あたって特定の態様で薄くしたことにより、電池反応に
支障を来すことなく、渦巻状電極体（11）の金属外装缶
（４）内への収納を容易にし、短絡の発生を低減して、
歩留りを向上させることができた。As described above, in the present invention, the spiral electrode body (1
Only the outer peripheral surface of the end portion (13) of the negative electrode (2) of the outermost peripheral portion (12) of (1) has a slope of 0.00063 ≦ tanθ ≦ 1 and the outermost peripheral portion (12) of the negative electrode (2) By reducing the thickness of the tip portion in a specific manner, the spiral electrode body (11) can be easily stored in the metal outer can (4) without hindering the battery reaction, and short-circuiting can be achieved. To reduce the occurrence of
The yield could be improved.
第１図は渦巻状電極体の横断面図で、第２図は渦巻状電
極体の最外周部の端部の要部拡大横断面図である。第３
図はアルカリ蓄電池の一例を示す縦断面図である。第４
図はtanθと短絡発生率との関係を示す図である。 （１）……正極、（２）……負極、（３）……セパレー
タ、 （４）……金属外装缶、（11）……渦巻状電極体、 （12）……最外周部、（13）……端部FIG. 1 is a cross-sectional view of the spiral electrode body, and FIG. 2 is an enlarged cross-sectional view of a main part of an end of the outermost peripheral portion of the spiral electrode body. Third
The figure is a longitudinal sectional view showing an example of the alkaline storage battery. 4th
The figure shows the relationship between tan θ and the rate of occurrence of short circuits. (1)… positive electrode, (2)… negative electrode, (3)… separator, (4)… metal outer can, (11)… spiral electrode body, (12)… outermost part, ( 13) ... End
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−107463（ＪＰ，Ａ) 特開 昭63−158762（ＪＰ，Ａ) 実開 昭53−160720（ＪＰ，Ｕ) 実開 平２−50964（ＪＰ，Ｕ) 実開 昭55−129372（ＪＰ，Ｕ) 実開 昭51−66727（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 10/00 - 10/30 H01M 10/34 H01M 4/24 - 4/26 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-1-107463 (JP, A) JP-A-63-158762 (JP, A) JP-A-53-160720 (JP, U) JP-A-2-107 50964 (JP, U) Japanese Utility Model Showa 55-129372 (JP, U) Japanese Utility Model Utility Model Showa 51-66727 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) H01M 10/00-10 / 30 H01M 10/34 H01M 4/24-4/26
Claims (1)
ト状の成形体からなる正極（１）と、水酸化カドミウム
または金属水素化物を含むシート状の成形体からなる負
極（２）とを、セパレータ（３）を介して重ね合わせ、
渦巻状に巻回して作製した渦巻状電極体（11）を金属外
装缶（４）内に収納してなるアルカリ蓄電池において、 上記渦巻状電極体（11）の最外周部（12）の負極（２）
の端部（13）の外周面側のみに0.00063≦tanθ≦１の傾
斜を持たせ、負極（２）の最外周部（12）の先端部の厚
みを薄くするにあたって削減する部分の厚みＷより残る
部分の厚みＹの方が厚くなるようにしつつ負極（２）の
最外周部（12）の先端部の厚みを薄くし、かつ渦巻状電
極体（11）の最内周部には傾斜を持たせていないことを
特徴とするアルカリ蓄電池。1. A positive electrode (1) made of a sheet-like molded body containing a metal oxide or a metal hydroxide, and a negative electrode (2) made of a sheet-shaped molded body containing a cadmium hydroxide or a metal hydride. , Superimposed via a separator (3),
In an alkaline storage battery in which a spirally wound electrode body (11) manufactured by spirally winding is housed in a metal outer can (4), a negative electrode (12) of the outermost peripheral portion (12) of the spirally wound electrode body (11) is provided. 2)
Only the outer peripheral surface side of the end portion (13) has a slope of 0.00063 ≦ tan θ ≦ 1, and the thickness W of the portion reduced in reducing the thickness of the tip portion of the outermost peripheral portion (12) of the negative electrode (2) The thickness of the tip of the outermost peripheral portion (12) of the negative electrode (2) is reduced while the thickness Y of the remaining portion is larger, and the innermost peripheral portion of the spiral electrode body (11) is inclined. An alkaline storage battery not provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2338988A JP3056520B2 (en) | 1990-11-30 | 1990-11-30 | Alkaline storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2338988A JP3056520B2 (en) | 1990-11-30 | 1990-11-30 | Alkaline storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04206473A JPH04206473A (en) | 1992-07-28 |
| JP3056520B2 true JP3056520B2 (en) | 2000-06-26 |
Family
ID=18323212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2338988A Expired - Fee Related JP3056520B2 (en) | 1990-11-30 | 1990-11-30 | Alkaline storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3056520B2 (en) |
-
1990
- 1990-11-30 JP JP2338988A patent/JP3056520B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04206473A (en) | 1992-07-28 |
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