JPH0578149B2 - - Google Patents
Info
- Publication number
- JPH0578149B2 JPH0578149B2 JP60216683A JP21668385A JPH0578149B2 JP H0578149 B2 JPH0578149 B2 JP H0578149B2 JP 60216683 A JP60216683 A JP 60216683A JP 21668385 A JP21668385 A JP 21668385A JP H0578149 B2 JPH0578149 B2 JP H0578149B2
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- air
- recess
- diffusion paper
- electrode case
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/04—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
- H01M12/06—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type with one metallic and one gaseous electrode
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Hybrid Cells (AREA)
Description
〔発明の技術分野〕
本発明は、ボタン形空気電池に関し、特に正極
ケースの空気拡散紙収納用凹部の形状を改良した
ボタン形空気電池に係わる。
〔発明の技術的背景とその問題点〕
従来のボタン形空気電池としては、第３図に示
す構造のものが知られている。即ち、図中の１は
底部に空気供給孔２と空気拡散紙収納用凹部３を
有する正極ケースである。この正極ケース１の凹
部３には空気拡散紙４が収納され、この拡散紙４
上にフツ素樹脂溌水性層５、正極触媒層６及びセ
パレータ７を順次積層して収納し、正極側組立体
を構成している。一方、負極側組立体はガスケツ
ト８に負極端子を兼ねるキヤツプ９を載せ、その
中に負極活物質１０を充填した構成になつてい
る。そして、前記正極組立体と負極組立体とを嵌
合して正極ケース１の開口部側を内方向に折り曲
げることにより前記正極ケース１及びキヤツプ９
内の電池要素が封口される。
ところで、前記空気拡散紙４は正極ケース１の
空気供給孔２より進入する空気を正極触媒層６に
均一に拡散する目的と、フツ素樹脂製溌水性層５
と正極触媒層６との変形を防止する目的とのため
に設けられている。また、前記正極ケース１の凹
部３は傾斜角がなだらか、つまり上部内径寸法を
下部内径寸法より大きくしてあると共に、この凹
部３に収納される前記拡散紙４は該凹部３の寸法
より十分小さい形状のものを用いている。
しかしながら、負極活物質１０の放電による膨
張により溌水性層５が空気拡散紙４側に押される
と、空気拡散紙４と正極ケース１の凹部３とに隙
間があるため、溌水性層５にリング状のくぼみ１
１が形成されて亀裂が発生したり、空気拡散紙４
が濡れてしまう。電解液で濡れた空気拡散紙４
は、正極ケース１の底部に開孔した空気供給孔２
から進入する空気の正極触媒層６への拡散を妨
げ、正極触媒層６の活性度を減少させる。その結
果、電池電性能の著しい劣化を生じ、その上放電
後更に負荷をつないだまま放置すると、空気供給
孔２からの漏液を発生する問題があつた。
このようなことから、負極活物質及び電解液の
量を少なくして漏液の発生を防止することが考え
られるが、電池容量が低下する問題を生じる。
〔発明の目的〕
本発明は、負極活物質の放電による膨張に伴な
つて溌水性層がくぼんで、電解液が溌水性層を通
過して空気拡散紙まで達するのを防止したボタン
型空気電池を提供しようとするものである。
〔発明の概要〕
本発明は、底部に空気供給孔を有すると共に空
気拡散紙収納用凹部が形成された正極ケース内
に、空気拡散紙、溌水性層及び正極触媒層を順次
積層した空気電池において、前記正極ケースに形
成された凹部を、その上部内径寸法に対する下部
内径寸法の差が０〜1.0mmとなる形状にしたこと
を特徴とするものである。
上述した構成によれば、正極ケースの凹部の側
面が垂直もしくは垂直に近い状態となり、該凹部
に空気拡散紙を収納すると、凹部と空気拡散紙の
間に僅かに隙間が生じるか、全く生じなくなる。
その結果、負極活物質の放電による膨張が起こ
り、溌水性層が空気拡散紙側に押されても、空気
拡散紙と凹部の間の隙間が僅かか、全くないた
め、溌水性層にリング状のくぼみが発生するのを
防止できる。その結果、溌水性層にクラツクが発
生すること等による電解液の溌水性層の通過を阻
止し、正極触媒層の活性能力を長期間劣化せず、
放電後更に負荷をつないだままの状態で放置して
も空気供給孔からの漏液を防止できる。
〔発明の実施例〕
以下、本発明の実施例を第１図及び第２図を参
照して説明する。
図中の２１は底部に空気供給孔２２空気拡散紙
収納用凹部２３有する正極ケースである。このケ
ース２１の凹部２３には空気拡散紙２４が収納さ
れ、この拡散紙２４上にはフツ素樹脂溌水性層２
５、ニツケルネツトに活性炭とポリテトラフルオ
ロエチレンパウダを混合した触媒物質を充填した
正極触媒層２６及びセパレータ２７を順次積層し
て正極側組立体を構成している。一方、負極側組
立体はガスケツト２８に負極端子を兼ねるキヤツ
プ２９を載せ、その中に電解液を含浸した負極活
物質３０を充填した構成になつている。そして、
前記正極組立体と負極組立体とを嵌合して正極ケ
ース２１の開口部側を内方向に折り曲げることに
より前記正極ケース１及びキヤツプ２９内の電池
要素を封口してPR44サイズの空気電池を製作し
た。
しかして、第２図に示すように正極ケース２１
の凹部２３における下部内径寸法a1を８mmとし、
上部内径寸法a2に対する下部内径寸法a1の差a2−
a1を０、0.5mm、1.0mm、1.5mm、2.0mmの電池を用意
し、これら電池について250Ω連続放電を行なつ
た。その結果を、電池６個平均としての放電継続
時間と、電池10個平均としての漏液率を下記表に
示した。なお、空気拡散紙は凹部の下部内径寸法
a1と同サイズのものを用いた。
[Technical Field of the Invention] The present invention relates to a button-type air battery, and more particularly to a button-type air battery in which the shape of the recess for storing air diffusion paper in the positive electrode case is improved. [Technical background of the invention and its problems] As a conventional button-type air battery, one having the structure shown in FIG. 3 is known. That is, 1 in the figure is a positive electrode case having an air supply hole 2 and an air diffusion paper storage recess 3 at the bottom. An air diffusion paper 4 is housed in the recess 3 of the positive electrode case 1.
A fluororesin water-repellent layer 5, a positive electrode catalyst layer 6, and a separator 7 are sequentially laminated and housed thereon to constitute a positive electrode side assembly. On the other hand, the negative electrode side assembly has a structure in which a cap 9 which also serves as a negative electrode terminal is mounted on a gasket 8, and a negative electrode active material 10 is filled in the cap 9. Then, by fitting the positive electrode assembly and the negative electrode assembly and bending the opening side of the positive electrode case 1 inward, the positive electrode case 1 and the cap 9 are closed.
The battery element inside is sealed. By the way, the purpose of the air diffusion paper 4 is to uniformly diffuse the air entering from the air supply hole 2 of the positive electrode case 1 into the positive electrode catalyst layer 6, and also to spread the air that enters the positive electrode case 1 through the air supply hole 2 into the positive electrode catalyst layer 6.
This is provided for the purpose of preventing deformation of the positive electrode catalyst layer 6 and the positive electrode catalyst layer 6. Further, the recess 3 of the positive electrode case 1 has a gentle slope, that is, the inner diameter of the upper part is larger than the inner diameter of the lower part, and the diffusion paper 4 accommodated in the recess 3 is sufficiently smaller than the dimension of the recess 3. A shape is used. However, when the water repellent layer 5 is pushed toward the air diffusion paper 4 side due to expansion due to discharge of the negative electrode active material 10, there is a gap between the air diffusion paper 4 and the recess 3 of the positive electrode case 1, so that the water repellent layer 5 has a ring. shaped depression 1
1 is formed and cracks occur, or the air diffusion paper 4
gets wet. Air diffusion paper wet with electrolyte 4
is an air supply hole 2 opened at the bottom of the positive electrode case 1.
This prevents air from entering the cathode catalyst layer 6 from diffusing into the cathode catalyst layer 6, thereby reducing the activity of the cathode catalyst layer 6. As a result, there was a problem in that the battery performance deteriorated significantly, and furthermore, if the battery was left with a load connected after discharge, liquid leaked from the air supply hole 2. For this reason, it is conceivable to reduce the amounts of the negative electrode active material and electrolyte to prevent leakage, but this poses a problem of decreasing battery capacity. [Object of the Invention] The present invention provides a button-type air cell in which a water-repellent layer is depressed as the negative electrode active material expands due to discharge, thereby preventing the electrolyte from passing through the water-repellent layer and reaching the air diffusion paper. This is what we are trying to provide. [Summary of the Invention] The present invention provides an air cell in which an air diffusion paper, a water-repellent layer, and a positive electrode catalyst layer are sequentially laminated in a positive electrode case having an air supply hole at the bottom and a recess for storing the air diffusion paper. The recess formed in the positive electrode case is characterized in that the difference in the inner diameter of the lower part with respect to the inner diameter of the upper part is 0 to 1.0 mm. According to the above-described configuration, the side surfaces of the recess of the positive electrode case are vertical or nearly vertical, and when the air diffusion paper is stored in the recess, a slight gap or no gap is created between the recess and the air diffusion paper. .
As a result, even if the negative electrode active material expands due to discharge and the water repellent layer is pushed toward the air diffusion paper, there is little or no gap between the air diffusion paper and the recess, so the water repellent layer has a ring-like shape. This can prevent the occurrence of dents. As a result, the electrolyte is prevented from passing through the water-repellent layer due to cracks occurring in the water-repellent layer, and the active ability of the positive electrode catalyst layer is not deteriorated for a long period of time.
Even if the load is left connected after discharge, leakage from the air supply hole can be prevented. [Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 21 in the figure is a positive electrode case having air supply holes 22 and air diffusion paper storage recesses 23 at the bottom. An air diffusion paper 24 is housed in the recess 23 of the case 21, and a fluororesin water-repellent layer 2 is placed on the diffusion paper 24.
5. A cathode side assembly is constructed by sequentially stacking a cathode catalyst layer 26 filled with a catalyst material made of a mixture of activated carbon and polytetrafluoroethylene powder and a separator 27 on a nickel net. On the other hand, the negative electrode side assembly has a structure in which a cap 29 which also serves as a negative electrode terminal is mounted on a gasket 28, and a negative electrode active material 30 impregnated with an electrolytic solution is filled in the cap 29. and,
The positive electrode assembly and the negative electrode assembly are fitted together and the opening side of the positive electrode case 21 is bent inward to seal the battery elements in the positive electrode case 1 and the cap 29 to produce a PR44 size air battery. did. Therefore, as shown in FIG. 2, the positive electrode case 21
The lower inner diameter dimension a1 of the recess 23 is 8 mm,
Difference between the lower inner diameter dimension a 1 and the upper inner diameter dimension a 2 a 2 −
Batteries with a 1 of 0, 0.5 mm, 1.0 mm, 1.5 mm, and 2.0 mm were prepared, and these batteries were continuously discharged at 250 Ω. The results are shown in the table below, which shows the discharge duration as an average of 6 batteries and the leakage rate as an average of 10 batteries. In addition, the air diffusion paper has the inner diameter of the lower part of the recess.
The same size as a1 was used.
以上詳述した如く、本発明によれば負極活物質
の放電による膨張に伴なつて溌水性層がくぼみ、
溌水性層のクラツク発生、電解液の溌水性層の通
過を防止でき、ひいては正極触媒層の活性能力を
長期間安定的に保持できると共に、放電による漏
液を防止した高性能、高信頼性のボタン形空気電
池を提供できる。
As detailed above, according to the present invention, the water-repellent layer is depressed as the negative electrode active material expands due to discharge,
It can prevent cracks in the water-repellent layer and the electrolyte from passing through the water-repellent layer, and can maintain the active ability of the positive electrode catalyst layer stably for a long period of time. We can provide button type air batteries.
第１図は本発明の一実施例を示すボタン形空気
電池の断面図、第２図は第１図の正極ケースの部
分拡大断面図、第３図は従来のボタン形空気電池
を示す断面図である。
２１……正極ケース、２２……空気供給孔、２
３……凹部、２４……空気拡散紙、２５……溌水
性層、２６……正極触媒層、２９……キヤツプ、
３０……負極活物質。
Fig. 1 is a sectional view of a button-type air battery showing an embodiment of the present invention, Fig. 2 is a partially enlarged sectional view of the positive electrode case of Fig. 1, and Fig. 3 is a sectional view of a conventional button-type air battery. It is. 21...Positive electrode case, 22...Air supply hole, 2
3... Concavity, 24... Air diffusion paper, 25... Water repellent layer, 26... Positive electrode catalyst layer, 29... Cap,
30... Negative electrode active material.
Claims (1)
収納用凹部が形成された正極ケース内に、空気拡
散紙、溌水性層及び正極触媒層を順次積層した空
気電池において、前記正極ケースに形成された凹
部を、その上部内径寸法に対する下部内径寸法の
差が０〜1.0mmとなる形状としたことを特徴とす
るボタン形空気電池。1. In an air cell in which an air diffusion paper, a water-repellent layer, and a positive electrode catalyst layer are sequentially laminated in a positive electrode case having an air supply hole at the bottom and a recess for storing air diffusion paper, the positive electrode case is formed in the positive electrode case. A button-shaped air cell characterized in that the recess is shaped such that the difference between the inner diameter of the upper part and the inner diameter of the lower part is 0 to 1.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21668385A JPS6276266A (en) | 1985-09-30 | 1985-09-30 | Button type air-cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21668385A JPS6276266A (en) | 1985-09-30 | 1985-09-30 | Button type air-cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6276266A JPS6276266A (en) | 1987-04-08 |
| JPH0578149B2 true JPH0578149B2 (en) | 1993-10-28 |
Family
ID=16692287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21668385A Granted JPS6276266A (en) | 1985-09-30 | 1985-09-30 | Button type air-cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6276266A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4189526A (en) * | 1978-05-05 | 1980-02-19 | Gould Inc. | Metal/oxygen cells and method for optimizing the active life properties thereof |
-
1985
- 1985-09-30 JP JP21668385A patent/JPS6276266A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6276266A (en) | 1987-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR960036187A (en) | Flat battery | |
| US2829186A (en) | Primary alkaline cell | |
| JPS59194361A (en) | Air cell | |
| US3489616A (en) | Galvanic atmospheric-oxygen cell | |
| EP0129881A1 (en) | Air-cathode button cell | |
| US6348281B1 (en) | Electrochemical cell having venting cover | |
| JPS63294672A (en) | Button type air-zinc cell | |
| US3342644A (en) | Sealed electrochemical cells | |
| CN111244582B (en) | Zinc-air battery positive electrode structure, assembly method and zinc-air battery | |
| JPH0578149B2 (en) | ||
| JPS58128678A (en) | Button air battery | |
| JPS6261279A (en) | Button type air cell | |
| US2649491A (en) | Dry cell | |
| JPH02253574A (en) | Button type air battery | |
| US6300006B1 (en) | Electrochemical cell having seal and cover assembly | |
| JPH0416374Y2 (en) | ||
| JPH07109776B2 (en) | Button type air battery | |
| JPS6337725Y2 (en) | ||
| JPS5831308Y2 (en) | alkaline battery | |
| JPH10189064A (en) | Cylindrical air battery | |
| JPS62202470A (en) | air button battery | |
| JPS5821070Y2 (en) | Button alkaline battery | |
| JPH0241818Y2 (en) | ||
| JPH0125417Y2 (en) | ||
| JP2726849B2 (en) | Sealed lead-acid battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |