【考案の詳細な説明】[Detailed explanation of the idea]
本考案はボタン型空気電池の空気流入孔を有す
る正極缶の改良に関するものである。
従来この種のボタン型空気電池は、正極に活性
炭からなる空気極を有し、空気中の酸素を吸着し
イオン化することにより、電流を取り出してい
た。このため空気の供給が必要条件となり、電池
の正極缶の底部に空気流入孔を設け、電池使用時
に空気流入孔から空気を流入させ空気極へ酸素を
供給し、酸素をイオン化することにより電流を取
り出し放電を行なつていた。
従来のボタン型空気電池は正極缶の底部が電池
の正極端子を兼ねており、多くの使用機器は電池
収納ケースの端子板が挿入電池の正極缶の底部に
直接接触する構造になつている。このため使用機
器の端子板が巾の広い板状の場合は、正極缶に設
けてある空気流入孔の入口が遮蔽されてしまい、
空気の流入が妨げられ酸素の供給量が不足し、空
気極の作動を不活発にする欠点を有していた。
この改善として、従来は空気流入孔を多数設け
ることにより使用機器の端子板による正極の遮蔽
を逃れていたが、使用機器の端子板の形状が多種
あり遮蔽される孔の数が一定にならなかつた。こ
のため遮蔽される孔の数が多い場合は同様に空気
の流入が妨げられイオン化する酸素の量が不足し
正極缶が不活発になり、電池放電性能が低下し
た。また逆に遮蔽される孔の数が少ない場合は空
気の流入が多すぎる外気の影響を受けやすく、遮
蔽されていない多数の空気流入孔から、例えば多
量の湿気が電池内へ流入し電解液に溶解し、電解
液のアルカリ濃度等の稀釈化による性能劣化や液
の増量による漏液を引き起こしたり、また酸素以
外の例えば炭素ガスが流入し、電解液のアルカリ
と反応し炭素アルカリ塩を生成し放電反応に必要
なアルカリを不足させたり、水の生成により電解
液の希釈化および増量があり、放電性能を劣化さ
せたり漏液を促進させる等の欠点を有していた。
本考案は正極缶の底部に正極端子を兼ねた円環
状の突部を形成し、この突部の立上り部に空気流
入孔を適数個設けた正極缶を用いたボタン型空気
電池で、使用時に適量な空気を供給し放電性能を
向上させることを目的とするものである。
本考案のボタン型空気電池の一実施例を第１図
にもとずいて説明する。
１は正極端子を兼ねた正極缶で正極端子を兼ね
た円環状の突部２を形成し、この突部の立上り部
に空気流入孔３を適数個設けている。４は空気極
で親液性の半透膜５と接している。６は苟性アル
カリ電解液を保持している電解液保持層で、保液
性、耐液性に優れた不織布または多孔体であり、
負極体７と接している。８は不織布で、空気極４
と接している多数の微孔を持つた撥水性のポリテ
トラフロロエチレンのシート９と、空気流入孔３
が設けられている正極缶１の底部との空間部にあ
り、空気溜めと空気極４への空気の均一拡散を行
なうものである。１０は負極缶でガスケツト１１
を介して正極缶１の開口部を折曲して電池を封口
している。
本考案のボタン型電池の空気流入孔３は第２図
に示したごとく、正極缶１の底部に正極端子を兼
ねた円環状の突部２の立上り部の側面に設けられ
ている。
このため、使用機器の電池収納ケースの接触端
子板１２がどのような形状であつても第２図のご
とく、空気流入孔３の入口は遮蔽されることなく
突部２の隙間１３から空気が流入し適量な空気が
均一に供給される。空気極４は酸素を吸着しイオ
ン化することが充分にできるため電池放電性能が
端子板１２の形状に影響を受けることなく向上す
るものである。また隙間１３を通つて空気が流入
するため流入量は適量で、多すぎて外気の影響を
受け湿気や炭素ガスにより電池性能が劣化するこ
とはない。
次に本考案の底部に正極端子を兼ねた円環状の
突部が形成され、この突部の立上り部に空気流入
孔を３個設けた正極缶を用いた本考案品と、底部
に突部を設けないで空気流入孔を有する正極缶を
用いた同型電池の従来品〔Ｂ〕との各10個を、実
際の使用機器の電池収納ケースの接触端子板１２
に接触させて、20℃で620Ωの定抵抗で放電し、
放電容量を表１に示した。
The present invention relates to an improvement of a positive electrode can having an air inflow hole for a button type air battery. Conventionally, this type of button-type air battery has an air electrode made of activated carbon as a positive electrode, and generates current by adsorbing and ionizing oxygen in the air. For this reason, air supply is a necessary condition, and an air inflow hole is provided at the bottom of the positive electrode can of the battery. When the battery is in use, air flows in through the air inflow hole to supply oxygen to the air electrode, and by ionizing the oxygen, the current is increased. It was taken out and discharged. In conventional button-type air batteries, the bottom of the positive electrode can also serves as the battery's positive terminal, and many devices used have a structure in which the terminal plate of the battery storage case directly contacts the bottom of the positive electrode can of the inserted battery. For this reason, if the terminal board of the device used is a wide plate, the entrance of the air inlet hole provided in the positive electrode can will be blocked.
This has the drawback that the inflow of air is obstructed and the amount of oxygen supplied is insufficient, making the air electrode inactive. To improve this, conventionally, the positive electrode was prevented from being shielded by the terminal board of the equipment used by providing a large number of air inflow holes, but since the terminal board of the equipment used has many different shapes, the number of holes to be shielded is not constant. Ta. For this reason, when the number of shielded holes is large, the inflow of air is similarly blocked, the amount of ionized oxygen becomes insufficient, the positive electrode can becomes inactive, and the battery discharge performance deteriorates. Conversely, if the number of shielded holes is small, it is susceptible to the influence of too much outside air, and a large amount of moisture may flow into the battery from the large number of unshielded air inflow holes, causing the electrolyte to leak. It may dissolve and cause performance deterioration due to dilution of the alkaline concentration of the electrolyte, or leakage due to an increase in the amount of liquid.Also, gases other than oxygen, such as carbon gas, may flow in and react with the alkali of the electrolyte to produce carbon alkali salts. This has disadvantages such as a lack of alkali necessary for the discharge reaction, dilution and increase in the amount of electrolyte due to the production of water, deterioration of discharge performance, and acceleration of leakage. This invention is a button-type air battery that uses a positive electrode can with an annular protrusion that also serves as a positive terminal formed on the bottom of the positive electrode can, and an appropriate number of air inflow holes in the rising part of this protrusion. The purpose of this is to supply an appropriate amount of air to improve discharge performance. An embodiment of the button-type air battery of the present invention will be explained based on FIG. 1. Reference numeral 1 denotes a positive electrode can that also serves as a positive electrode terminal, and has an annular protrusion 2 that also serves as a positive electrode terminal, and an appropriate number of air inflow holes 3 are provided in the rising portion of this protrusion. 4 is an air electrode which is in contact with a lyophilic semipermeable membrane 5. 6 is an electrolyte holding layer holding an alkaline electrolyte, which is a nonwoven fabric or porous material with excellent liquid retention and liquid resistance;
It is in contact with the negative electrode body 7. 8 is a non-woven fabric, air electrode 4
A water-repellent polytetrafluoroethylene sheet 9 with numerous micropores is in contact with the air inlet hole 3.
It is located in a space between the bottom of the positive electrode can 1 and the bottom of the positive electrode can 1, where the air reservoir and the air electrode 4 are provided, and uniformly diffuses the air to the air reservoir and the air electrode 4. 10 is the negative electrode can and gasket 11
The battery is sealed by bending the opening of the positive electrode can 1 through the opening. As shown in FIG. 2, the air inflow hole 3 of the button-type battery of the present invention is provided on the side surface of the rising part of the annular protrusion 2 which also serves as the positive electrode terminal at the bottom of the positive electrode can 1. Therefore, no matter what shape the contact terminal plate 12 of the battery storage case of the device in use is, as shown in FIG. An appropriate amount of air is uniformly supplied. Since the air electrode 4 can sufficiently adsorb and ionize oxygen, the battery discharge performance is improved without being affected by the shape of the terminal plate 12. Furthermore, since air flows in through the gap 13, the amount of air flowing in is a suitable amount, and the cell performance will not deteriorate due to humidity or carbon gas due to the influence of outside air if it is too large. Next, the present invention uses a positive electrode can in which an annular protrusion that also serves as a positive electrode terminal is formed on the bottom of the present invention, and three air inflow holes are provided in the rising part of this protrusion. 10 pieces of each of the conventional product [B] of the same type of battery using a positive electrode can with an air inflow hole without providing a
Discharge with a constant resistance of 620Ω at 20℃,
The discharge capacity is shown in Table 1.
【表】
表１より、本考案品〔Ａ〕は従来品〔Ｂ〕に比
較して、放電持続時間が大巾に向上し同バラツキ
巾も小さくなつていることがわかる。
以上のように、正極缶の底部に正極端子を兼ね
た円環状の突部を形成し、この突部の立上り部に
空気流入孔を設けた正極缶を用いたボタン型空気
電池は、使用時に適量な空気を供給することがで
き放電性能を向上するものである。[Table] From Table 1, it can be seen that the product [A] of the present invention has a significantly improved discharge duration and a smaller variation in discharge duration than the conventional product [B]. As described above, a button-type air battery using a positive electrode can with an annular protrusion that also serves as a positive terminal formed on the bottom of the positive electrode can and an air inflow hole in the rising part of this protrusion, is It can supply an appropriate amount of air and improve discharge performance.
【図面の簡単な説明】[Brief explanation of the drawing]
第１図は本考案のボタン型電池の断面図、第２
図は使用幾器の電池収納ケースの端子板との接触
状態を表わす要部拡大断面図である。
１……正極缶、２……突起部、３……空気流入
孔、４……空気極、８……不織布、１２……端子
板、１３……隙間。
Figure 1 is a sectional view of the button-type battery of the present invention, Figure 2 is a cross-sectional view of the button-type battery of the present invention.
The figure is an enlarged cross-sectional view of the main parts showing the state of contact with the terminal plate of the battery storage cases used. DESCRIPTION OF SYMBOLS 1...Positive electrode can, 2...Protrusion, 3...Air inflow hole, 4...Air electrode, 8...Nonwoven fabric, 12...Terminal board, 13...Gap.