JP2545182Y2 - Flat battery - Google Patents
Flat batteryInfo
- Publication number
- JP2545182Y2 JP2545182Y2 JP1990082733U JP8273390U JP2545182Y2 JP 2545182 Y2 JP2545182 Y2 JP 2545182Y2 JP 1990082733 U JP1990082733 U JP 1990082733U JP 8273390 U JP8273390 U JP 8273390U JP 2545182 Y2 JP2545182 Y2 JP 2545182Y2
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- separator
- electrode mixture
- flat
- electrolyte
- 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
-
- Y02E60/12—
Landscapes
- Cell Separators (AREA)
Description
【考案の詳細な説明】 《産業上の利用分野》 この考案は偏平形電池に関し、特にセパレータの形状
の改良に関するものである。[Detailed description of the invention] << Industrial application field >> This invention relates to a flat battery, and more particularly to an improvement in the shape of a separator.
《従来の技術》 偏平形電池は、第３図に示すように、円形をなす偏平
容器状の正極缶１の内底部に円盤状のペレットに形成さ
れた正極合剤２を収容し、その上部にセパレータ３を載
置し、非水電解液４を注液した上で、前記セパレータ３
の上部に金属リチウムなどの負極５を設置し、かつ封口
ガスケット６を介して前記正極缶１の開口面に負極端子
板７をカシメ付けて内部を気密に覆った構造である。<< Prior Art >> As shown in FIG. 3, a flat battery contains a positive electrode mixture 2 formed into a disc-shaped pellet in the inner bottom of a circular flat container-shaped positive electrode can 1 and an upper portion thereof. The separator 3 is placed on the separator 3 and the non-aqueous electrolyte 4 is injected.
A negative electrode 5 made of metal lithium or the like is placed on top of the above, and a negative electrode terminal plate 7 is caulked to the opening surface of the positive electrode can 1 via a sealing gasket 6 to hermetically cover the inside.
なお、電解液４は完成状態では各部に浸透し、実際に
は見えるものではないが、説明の都合上図示している。In the completed state, the electrolytic solution 4 penetrates into each part and is not actually visible, but is shown for convenience of explanation.
この構成において、前記正極合剤２の径は正極缶１の
内径よりかなり小さく、前記封口ガスケット６を装着す
る前段階において両者間の隙間が非水電解液４をためる
保液空間ａとなっている。In this configuration, the diameter of the positive electrode mixture 2 is considerably smaller than the inner diameter of the positive electrode can 1, and a gap between the two serves as a liquid retaining space a for storing the non-aqueous electrolyte 4 before the sealing gasket 6 is mounted. I have.
また、セパレータ３の径は正極缶１の内径より若干径
大に形成されているが、絞り加工によってカップ状に絞
られ、正極缶１からのはみだしを防止している。The diameter of the separator 3 is slightly larger than the inner diameter of the positive electrode can 1, but is drawn into a cup shape by drawing to prevent the separator 3 from protruding from the positive electrode can 1.
そして、セパレータ３の斜めに傾斜する周縁部3aと、
正極缶１の内周縁の間には、第４図（Ａ）に示すように
当初は隙間ｄが形成され、注液ノズル８を用いて非水電
解液４を注液すると、電解液４の一部はセパレータ３に
含浸され、残りが隙間ｄを伝って保液空間ａの内部に注
液され、ここから正極合剤２に内部に浸透する。And, a peripheral edge portion 3a that is obliquely inclined of the separator 3,
A gap d is initially formed between the inner peripheral edges of the positive electrode can 1 as shown in FIG. 4 (A), and when the nonaqueous electrolyte 4 is injected using the injection nozzle 8, the electrolyte 4 A part is impregnated in the separator 3, and the rest is injected into the liquid retaining space a through the gap d, and penetrates into the positive electrode mixture 2 from here.
《考案が解決しようとする課題》 しかしながら、絞り加工されたセパレータ３の周縁部
は、常に元の平らな状態に戻ろうとし、同第４図（ｂ）
に示すように、時間の経過に伴って平坦化し、セパレー
タ３の周縁が正極缶１の内壁に接して保液空間ａを蓋す
る状態になる。<< Problem to be solved by the invention >> However, the peripheral portion of the drawn separator 3 always tries to return to the original flat state, and FIG.
As shown in (2), the surface is flattened with the passage of time, and the periphery of the separator 3 comes into contact with the inner wall of the positive electrode can 1 so as to cover the liquid retaining space a.
そして、この状態で注液が行われると、注液によって
濡れたセパレータ３が保液空間ａの空気抜きの障害とな
り、電解液が保液空間ａ内に十分に行きわたらず、セパ
レータ３の表面に滞留する結果、負極４を組み合わせた
段階でその滞留した電解液が周囲にはみだし、通称液吹
き現象の原因となり、保液量のバラツキや、それによる
性能不良の原因となっていた。Then, when the liquid is injected in this state, the separator 3 wet by the injection becomes an obstacle to the air bleeding of the liquid retaining space a, and the electrolyte does not sufficiently reach the liquid retaining space a. As a result of the stagnation, at the stage when the negative electrode 4 is combined, the stagnated electrolyte protrudes into the surroundings, causing a so-called liquid blowing phenomenon, causing a variation in the amount of retained liquid and resulting in poor performance.
この種の現象を防止する対策としてまず考えられるこ
とは、注液時間を長くする，或いは次工程とのタクト時
間を長く取ることであるが、このように時間を長くとっ
た場合には、当然のことながら生産性が低下する。One of the first measures to prevent this kind of phenomenon is to increase the injection time or to increase the tact time for the next process. However, productivity decreases.
また、セパレータの径を正極缶の内径と同じにするこ
とも考えられるが、例えば直径25mmのセパレータを24mm
に減少させた場合には体積で約８％も減少するため、今
度はセパレータ自体の保液性が減少し、同じく性能に影
響を及ぼすものとなっていた。It is also conceivable to make the diameter of the separator the same as the inner diameter of the positive electrode can.
When the volume is reduced to about 8%, the volume is reduced by about 8%, so that the liquid retention of the separator itself is reduced, which also affects the performance.
この考案は以上の欠点を解消するものであって、セパ
レータの保液量を減少させることなく、十分な量の電解
液を保液空間内に行きわたらすことの出来る偏平形電池
を提供することを目的とする。This invention solves the above-mentioned drawbacks, and provides a flat battery that can spread a sufficient amount of electrolyte into the liquid holding space without reducing the liquid holding amount of the separator. With the goal.
《課題を解決するための手段》 前記目的を達成するため、この考案は、円形をした偏
平容器状の正極缶と、前記正極缶の内壁との間に隙間を
設けて収容される正極合剤と、この正極合剤の上部に載
置されたセパレータと、このセパレータに非水電解液を
含浸させた状態でその上部に配置される負極と、この負
極を前記正極間との間に介装される封口ガスケットとを
備えた偏平形電池において： 前記セパレータは、前記正極合剤の外形より径大の円
盤状に形成され、その周縁に複数設けられた切欠きとカ
ップ状に絞り加工された部分とを有し、前記切欠が円弧
部とこの円弧部の弦によって画成されてなるのである。<< Means for Solving the Problems >> In order to achieve the above object, the present invention provides a positive electrode can having a circular flat container shape, and a positive electrode mixture accommodated with a gap provided between inner walls of the positive electrode can. And a separator placed on top of the positive electrode mixture, a negative electrode placed on top of the separator with the non-aqueous electrolyte impregnated, and the negative electrode interposed between the positive electrodes The separator is formed in a disk shape having a diameter larger than the outer shape of the positive electrode mixture, and a plurality of cutouts provided on a peripheral edge thereof and drawn into a cup shape. And the notch is defined by an arc portion and a chord of the arc portion.
《作用》 以上の構成によれば、注液された電解液はセパレータ
に含浸されるほか、セパレータ周縁と正極缶の内壁との
間に形成された隙間を伝って正極合剤と正極缶内壁との
隙間、すなわち保液空間内に注液される。<< Action >> According to the above configuration, the injected electrolyte is impregnated into the separator, and the positive electrode mixture and the inner wall of the positive electrode can pass through the gap formed between the periphery of the separator and the inner wall of the positive electrode can. , Ie, into the liquid holding space.
このとき、セパレータの周縁が正極缶内壁に接触し開
口面全体を覆っている場合であっても複数の切欠きが設
けてあるので、電解液の保液空間に対する流下の障害に
ならない。At this time, even when the peripheral edge of the separator contacts the inner wall of the positive electrode can and covers the entire opening surface, since the plurality of notches are provided, it does not hinder the electrolyte from flowing down into the liquid holding space.
《実施例》 以下、この考案の一実施例を図面を用いて詳細に説明
する。<< Embodiment >> Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
なお、この考案の要部であるセパレータ以外の構成は
従来と同一なので、その同一部分には同一符号を付し、
要部のみに付いて説明を行う。Since the configuration other than the separator, which is a main part of the present invention, is the same as that of the related art, the same parts are denoted by the same reference numerals,
Only the main parts will be described.
第１図（Ａ），（Ｂ）において、セパレータ10は正極
缶１の内径より若干大きな径であって、正極合剤２の直
径に相当する径の中央部分10aと、この中央部分10aに稜
線部10bを介して折り曲げられた周囲部分10cとからなっ
ており、これらのカップ形状は絞り加工によって形成さ
れる。1 (A) and 1 (B), the separator 10 has a diameter slightly larger than the inner diameter of the positive electrode can 1 and has a diameter corresponding to the diameter of the positive electrode mixture 2 and a ridgeline at the center 10a. It has a peripheral portion 10c bent through the portion 10b, and these cup shapes are formed by drawing.
そして、この周囲部分10には90°間隔で４つの切欠き
10dが形成されている。この各切欠き10dは前記セパレー
タの打ち抜き工程においてそのパンチ形状により円盤状
の周囲に４箇所形成され、各切欠き10dは円弧部とこの
円弧部の弦によって画成される。And four notches at 90 ° intervals in this peripheral part 10
10d is formed. Each notch 10d is formed at four locations around the disk by the punch shape in the step of punching the separator, and each notch 10d is defined by an arc portion and a chord of the arc portion.
したがって、このセパレータ10のカップ形状を逆さに
した状態で正極合剤２の上面に載置すると、第２図に示
すように中央部10aが正極合剤２の表面に設置され、周
囲部分10cが正極缶１の内壁下部に向けて斜めに傾斜し
た状態となる。Therefore, when the separator 10 is placed on the upper surface of the positive electrode mixture 2 with the cup shape inverted, the central portion 10a is set on the surface of the positive electrode mixture 2 as shown in FIG. The positive electrode can 1 is inclined obliquely toward the lower part of the inner wall.
周囲部分10cの傾斜が急である場合、すなわち絞り加
工直後或いは形状加工が正確に行われている場合には、
その傾斜角度に応じて正極缶１の内壁との間に隙間ｄが
生じていることは、既に述べたが、傾斜が緩い場合であ
っても前記切欠き10dと内壁の間には必ず隙間d1が生じ
ている。When the inclination of the peripheral portion 10c is steep, that is, immediately after drawing or when shape processing is accurately performed,
As described above, a gap d is formed between the notch 10d and the inner wall even when the inclination is gentle, as described above. Has occurred.
したがって、このセパレータ10の上部から電解液４を
注液した場合には、各切欠き10dの切欠き量に応じた複
数の隙間d1を伝って空気と電解液の置換が行われ、保液
空間ａ内に電解液を注液できることになるのである。Therefore, when the electrolytic solution 4 is injected from the upper part of the separator 10, the air and the electrolytic solution are replaced through the plurality of gaps d1 corresponding to the notches of each notch 10d, and the liquid retaining space is formed. This means that the electrolyte can be injected into a.
なお、切欠きの大きさは、従来の直径全体を切り詰め
る場合に比してセパレータ全体の体積減少はごく僅かで
良く、セパレータ自体の保液量も十分に確保できる。As for the size of the notch, the volume of the entire separator is only slightly reduced as compared with the conventional case where the entire diameter is cut off, and the liquid holding amount of the separator itself can be sufficiently ensured.
ちなみに、CR2450形偏平形電池にあっては正極缶１の
内径は24mm,セパレータ10の直径は25mmに設定され、そ
の径に対する各切欠き10dの切欠き深さを0.5mmに設定場
合の体積減少は全体の僅かに２％と、ほとんど無視でき
る数値であり、しかもその切欠き深さであれば限られた
注液時間で保液空間ａ内の空気と電解液の置換が十分に
行われる。By the way, in the CR2450 type flat battery, the inner diameter of the positive electrode can 1 is set to 24 mm, the diameter of the separator 10 is set to 25 mm, and the volume is reduced when the notch depth of each notch 10 d for that diameter is set to 0.5 mm. Is only 2% of the whole, which is almost negligible, and if the notch depth is sufficient, the air in the liquid retaining space a and the electrolyte are sufficiently replaced within a limited injection time.
この場合の注液量は600mgであるが、電解液が効率良
く注入されたか否かは、それによって生ずる放電持続時
間の長さおよび偏差値によって例示できる。In this case, the injection amount is 600 mg, but whether or not the electrolytic solution has been efficiently injected can be exemplified by the length of the discharge duration and the deviation value caused thereby.
以下の表は本考案によるセパレータを用いたCR2450形
偏平形電池および従来の円盤形セパレータを用いたCR24
50形偏平形電池のそれぞれ10個について平均放電持続時
間とそのバラツキ（最短時間から最長時間の時間差）を
測定した結果を示すものである。The following table shows the CR2450 flat battery using the separator according to the present invention and the CR24 using the conventional disc-shaped separator.
It shows the results of measuring the average discharge duration and its variation (time difference from the shortest time to the longest time) for each of 10 50-type flat batteries.
なお、放電条件は、20℃において2.7KΩ連続放電、終
止電圧は2.0Vに設定した。The discharge conditions were set to continuous discharge of 2.7 KΩ at 20 ° C., and the cutoff voltage was set to 2.0 V.
以上の表から明らかなように、本考案品では、従来品
に比べて明からに平均放電持続時間が長く、また、その
バラツキも少なく、平均化した性能を得られる。また、
このことは本考案では注液がむらなく行われ、注液時に
おける電解液の損失が少ないことを示唆するものであ
る。 As is clear from the above table, in the product of the present invention, the average discharge duration is apparently longer than that of the conventional product, the variation is small, and an averaged performance can be obtained. Also,
This suggests that the injection is performed evenly in the present invention, and the loss of the electrolyte during the injection is small.
《考案の効果》 以上実施例によって詳細に説明したように、この考案
による偏平形電池にあっては、セパレータ全体の体積減
少はごく僅かでよく、セパレータ自体の保液量も十分に
確保でき、十分な量の電解液を保液空間内に行きわたら
すことができ、注液量のバラツキおよびこれによる性能
の低下やバラツキを未然に防止できる。<< Effects of the Invention >> As described in detail in the above embodiments, in the flat battery according to the invention, the volume reduction of the entire separator may be very small, and the liquid holding amount of the separator itself can be sufficiently secured. A sufficient amount of the electrolytic solution can be spread in the liquid holding space, and variations in the amount of injected liquid and a decrease in performance due to this can be prevented.
第１図（Ａ），（Ｂ）はこの考案に係る偏平形電池のセ
パレータを示す説明図、第２図は同セパレータ上に電解
液を注液している状態を示す断面説明図、第３図は偏平
形電池の完成状態を示す断面図、第４図（Ａ），（Ｂ）
は従来のセパレータを用いた場合の注液時の状態および
不具合を示す断面図である。 １……正極缶 ２……正極合剤 ４……非水電解液 ５……負極 ６……封口ガスケット ７……負極端子板 10……セパレータ 10a……中央部,10b……稜線部 10c……周囲部,10d……切欠き ａ……保液空間 d,d1……隙間1 (A) and 1 (B) are explanatory views showing a separator of the flat battery according to the present invention, FIG. 2 is a sectional explanatory view showing a state where an electrolyte is injected onto the separator, and FIG. The figure is a sectional view showing the completed state of the flat battery, and FIGS. 4 (A) and 4 (B).
FIG. 3 is a cross-sectional view showing a state and a defect at the time of liquid injection when a conventional separator is used. DESCRIPTION OF SYMBOLS 1 ... Positive electrode can 2 ... Positive electrode mixture 4 ... Non-aqueous electrolyte 5 ... Negative electrode 6 ... Sealing gasket 7 ... Negative electrode terminal plate 10 ... Separator 10a ... Central part, 10b ... Ridge part 10c ... … Surrounding area, 10d …… Notch a …… Liquid retention space d, d1 …… Gap
Claims (1)
極缶の内壁との間に隙間を設けて収容される正極合剤
と、この正極合剤の上部に載置されたセパレータと、こ
のセパレータに非水電解液を含浸させた状態でその上部
に配置される負極と、この負極を前記正極缶との間に介
装される封口ガスケットとを備えた偏平形電池におい
て、前記セパレータは、前記正極合剤の外形より径大の
円盤状に形成され、その周縁に複数設けられた切欠きと
カップ状に絞り加工された部分とを有し、前記切欠が円
弧部とこの円弧部の弦によって画成されてなることを特
徴とする偏平形電池。1. A positive electrode can in the form of a circular flat container, a positive electrode mixture accommodated with a gap provided between inner walls of the positive electrode can, and a separator placed on top of the positive electrode mixture. A flat-type battery including a negative electrode disposed above the separator in a state where the non-aqueous electrolyte is impregnated, and a sealing gasket interposed between the negative electrode and the positive electrode can; Is formed in a disk shape having a diameter larger than the outer shape of the positive electrode mixture, and has a plurality of cutouts provided on a peripheral edge thereof and a portion drawn in a cup shape, and the cutouts have an arc portion and the arc portion. A flat battery characterized by being defined by a string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990082733U JP2545182Y2 (en) | 1990-08-06 | 1990-08-06 | Flat battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990082733U JP2545182Y2 (en) | 1990-08-06 | 1990-08-06 | Flat battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0440463U JPH0440463U (en) | 1992-04-06 |
| JP2545182Y2 true JP2545182Y2 (en) | 1997-08-25 |
Family
ID=31629804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990082733U Expired - Lifetime JP2545182Y2 (en) | 1990-08-06 | 1990-08-06 | Flat battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2545182Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63291360A (en) * | 1987-05-22 | 1988-11-29 | Matsushita Electric Ind Co Ltd | Organic electrolyte battery |
-
1990
- 1990-08-06 JP JP1990082733U patent/JP2545182Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63291360A (en) * | 1987-05-22 | 1988-11-29 | Matsushita Electric Ind Co Ltd | Organic electrolyte battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0440463U (en) | 1992-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |