JP2816975B2 - Non-aqueous electrolyte battery - Google Patents
Non-aqueous electrolyte batteryInfo
- Publication number
- JP2816975B2 JP2816975B2 JP63068971A JP6897188A JP2816975B2 JP 2816975 B2 JP2816975 B2 JP 2816975B2 JP 63068971 A JP63068971 A JP 63068971A JP 6897188 A JP6897188 A JP 6897188A JP 2816975 B2 JP2816975 B2 JP 2816975B2
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- lithium
- active material
- electrode active
- punch
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/06—Electrodes for primary cells
- H01M4/08—Processes of manufacture
- H01M4/12—Processes of manufacture of consumable metal or alloy electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Primary Cells (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、リチウム等の軟質軽金属を負極活物質とす
る非水電解液電池に関するものである。The present invention relates to a nonaqueous electrolyte battery using a soft light metal such as lithium as a negative electrode active material.
本発明は、リチウム等の軟質軽金属を負極活物質とす
る非水電解液電池において、圧着面に凹凸を有する模様
を設けた圧着パンチにより、負極活物質と負極缶を密着
させることにより、非水電解液電池の大電流化を図るも
のである。The present invention relates to a non-aqueous electrolyte battery using a soft light metal such as lithium as a negative electrode active material. The purpose is to increase the current of the electrolyte battery.
従来、リチウム等の軟質軽金属からなる負極活物質を
圧着パンチのフラット面で、負極缶内面に圧着してい
た。Conventionally, a negative electrode active material made of a soft light metal such as lithium has been pressure-bonded to the inner surface of a negative electrode can with a flat surface of a pressure-bonding punch.
また、リチウムと負極缶を圧着させることは、例えば
特開昭57−12861号公報に開示されている。Further, pressure bonding of lithium and a negative electrode can is disclosed in, for example, JP-A-57-12861.
従来の電池は圧着パンチのフラット面で、リチウムを
負極缶内面に圧着していたので、圧着部分が点在し、リ
チウムと負極缶のリード性が悪くなり、大きな電流を取
り出すことができない欠点があった。In the conventional battery, lithium was crimped on the inner surface of the negative electrode can with the flat surface of the crimping punch, so the crimped parts were scattered, the leadability of lithium and the negative electrode can deteriorate, and the drawback that large current could not be taken out there were.
上記の問題点を解決するためにこの発明は、圧着面に
凹凸を有する模様を設けた圧着パンチにより、負極活物
質と負極缶の密着性を向上せしめ、大電流が取り出せる
非水電解液電池を得るものである。In order to solve the above problems, the present invention provides a non-aqueous electrolyte battery capable of improving the adhesiveness between a negative electrode active material and a negative electrode can by using a pressure bonding punch provided with a pattern having irregularities on a pressure bonding surface and capable of extracting a large current. What you get.
圧着面に凹凸を有する模様を設けた圧着パンチで負極
活物質を負極缶に圧着すると密着性が向上する理由につ
いて説明する。The reason why the adhesion is improved when the negative electrode active material is press-bonded to the negative electrode can using a pressure-bonding punch provided with a pattern having irregularities on the pressure-bonding surface will be described.
従来の圧着パンチはフラット面で、負極活物質を負極
缶に圧着する場合には、負極缶内面フラット部と圧着パ
ンチ面とが平行に成り難く、間に介在する負極活物質は
強く加圧される部分のみ圧着することになる。Conventional crimping punches have a flat surface, and when crimping the negative electrode active material to the negative electrode can, it is difficult for the flat portion of the inner surface of the negative electrode can and the crimping punch surface to be parallel, and the negative electrode active material interposed therebetween is strongly pressed. Only the part that is to be crimped.
また、圧着パンチ全面で押圧するとどうしても打抜さ
れたリチウムシートの外周部のみが負極缶と密着し、中
央部は空気溜りが生じて密着しない。このリチウム外周
部が負極缶に密着する理由は打抜バリがあって圧着パン
チで強く押圧されることと新しいリチウム面が露出して
いる為と考えられる。In addition, when pressing is performed by the entire surface of the pressure-bonding punch, only the outer peripheral portion of the punched lithium sheet is in close contact with the negative electrode can, and the central portion is air-tight and does not adhere. It is considered that the reason why the outer peripheral portion of the lithium is in close contact with the negative electrode can is that there is a punching burr, which is strongly pressed by a compression punch, and that a new lithium surface is exposed.
一方、本発明は圧着パンチ面に凹凸を有する模様を設
けているので、リチウムの外周部だけでなく他の部分も
密着する。特に、凸部が強くリチウムに押圧するので凸
部が打った部分の密着性が強い。また、この凸部の模様
は所々切られているので、この切欠部からリチウムを押
圧するときに空気が逃げるので、リチウムの中央部も負
極缶と密着する。On the other hand, in the present invention, since a pattern having irregularities is provided on the press-bonding punch surface, not only the outer peripheral portion of lithium but also other portions are in close contact. In particular, since the convex portion strongly presses against lithium, the adhesion of the portion hit by the convex portion is strong. Further, since the pattern of the convex portion is partially cut, air escapes when lithium is pressed from the notch portion, so that the central portion of lithium is also in close contact with the negative electrode can.
第１図は本発明を適用した圧着パンチ面の模様を示し
た図である。FIG. 1 is a view showing a pattern of a pressure punch surface to which the present invention is applied.
図中、１は凸部で、高さ0.2mm,2は凹部である。この
パンチ外径は16.8mmで、凸部１の幅は1mmである。凹部
２の幅は0.75mmである。また、凸部１の切欠部３の幅は
2mmである。In the figure, 1 is a convex portion, 0.2 mm in height, and 2 is a concave portion. The outer diameter of the punch is 16.8 mm, and the width of the projection 1 is 1 mm. The width of the recess 2 is 0.75 mm. The width of the notch 3 of the projection 1 is
2 mm.
次に、圧着パンチ面に模様を付けた場合と付けない場
合のリチウムと負極缶の密着性を調べた。密着性テスト
は負極缶上へ外径16mm,厚み0.28mmのリチウムを載置
し、圧力100kg/cm2でプレスし、リチウムと負極缶の密
着面積で評価した。Next, the adhesion between lithium and the negative electrode can was examined with and without a pattern on the surface of the compression punch. In the adhesion test, lithium having an outer diameter of 16 mm and a thickness of 0.28 mm was placed on the negative electrode can, pressed at a pressure of 100 kg / cm 2 , and evaluated by the adhesion area between lithium and the negative electrode can.
密着がリチウムの外周部だけで、中央部が密着してい
ないのを不良として扱った。The case where the adhesion was only at the outer peripheral portion of lithium and the central portion was not adhered was treated as defective.
本発明と従来例を比較して第１表に示す。データはｎ
＝50の不良率で表した。Table 1 shows a comparison between the present invention and a conventional example. The data is n
= 50 defective rate.
以上説明したことから、本発明は負極活物質と負極缶
の密着性が著しく向上した。その手段として圧着パンチ
面に凹凸を有する模様を配設して効果的に利用した。 As described above, in the present invention, the adhesiveness between the negative electrode active material and the negative electrode can was significantly improved. As a means for this, a pattern having irregularities was arranged on the surface of the pressure-bonding punch and used effectively.
なお、パンチ面の模様は任意に設定できる。一例を示
せば、第２図に示す模様がある。図中、21は凸部、22は
凹部、23は切欠部である。The pattern on the punch surface can be set arbitrarily. As an example, there is a pattern shown in FIG. In the figure, 21 is a convex portion, 22 is a concave portion, and 23 is a cutout portion.
以下に本発明の実施例を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
実施例１ 第３図は本発明を適用した第１の実施例（１）を示す
断面図である。電池はCS2438（公称容量72mAh,24×38×
0.5mm）である。Embodiment 1 FIG. 3 is a sectional view showing a first embodiment (1) to which the present invention is applied. Battery is CS2438 (nominal capacity 72mAh, 24 × 38 ×
0.5 mm).
図中、31は正極缶、32はMnO2を主体とした正極合剤、
33はセパレータ、34は負極缶35内面に配設され、圧着さ
れている金属リチウムである。36,37は封口材である。In the figure, 31 is a positive electrode can, 32 mainly containing MnO 2 positive electrode material mixture,
Reference numeral 33 denotes a separator, and reference numeral 34 denotes metallic lithium disposed on the inner surface of the negative electrode can 35 and pressed. 36 and 37 are sealing materials.
リチウム34を圧着するパンチ面に第１図のような模様
を付けた本発明電池と模様を付けていない従来電池の放
電深度毎閉路電圧を比較した。A comparison was made between the battery of the present invention having a pattern as shown in FIG. 1 on the punch surface on which the lithium 34 was pressed and the conventional battery without the pattern, with respect to the discharge voltage per discharge depth.
閉路電圧は、−10℃で測定し、2mAで１秒間放電した
ときの最小値である。結果を第２表に示す。データはｎ
＝12である。単位は電圧（Ｖ）である。The closing voltage is a minimum value measured at −10 ° C. and discharged at 2 mA for 1 second. The results are shown in Table 2. The data is n
= 12. The unit is voltage (V).
表２より明らかなように、本発明電池は従来電池に比
べて、放電深度毎の閉路電圧が高く、かつバラツキも小
さく優れていることがわかる。 As is clear from Table 2, the battery of the present invention is superior to the conventional battery in that the closed circuit voltage at each depth of discharge is high, and the variation is small.
すなわち、放電深度毎の大電流パルス特性が優れてい
る。That is, the large current pulse characteristics for each discharge depth are excellent.
この本発明の優れている理由は、金属リチウムと負極
缶の密着面積が従来電池に比べて増加したため、大電流
を取り出す時でも電池反応が表面積が大きい分内部抵抗
が小さくなり、スムースに行われたためと考える。The reason why the present invention is excellent is that the contact area between the metal lithium and the negative electrode can is increased as compared with that of the conventional battery. Think
尚、本実施例ではリチウムを直接圧着パンチでプレス
加工したが、リチウム34の上にセパレータ33を載置して
からプレスしても同様の効果が期待できる。In this embodiment, the lithium is directly pressed by the press-bonding punch. However, the same effect can be expected if the separator 33 is placed on the lithium 34 and then pressed.
実施例２ 第４図は本発明を適用した第２の実施例（２）を示す
断面図である。電池はCR2016である。図中、41は正極
缶、42はMnO2を主体とした正極合剤、43はセパレータ、
44は負極缶45の内面に配設され、圧着されている金属リ
チウムである。46はガスケットである。Embodiment 2 FIG. 4 is a sectional view showing a second embodiment (2) to which the present invention is applied. Battery is CR2016. In the figure, 41 is a positive electrode can, 42 is a positive electrode mixture mainly composed of MnO 2 , 43 is a separator,
Reference numeral 44 denotes metallic lithium disposed on the inner surface of the negative electrode can 45 and pressed. 46 is a gasket.
リチウム44を圧着するパンチ面に第２図のような模様
を付けた本発明電池と模様を付けない従来電池の放電深
度毎閉路電圧を比較した。閉路電圧は−10℃で測定し、
負荷抵抗500Ωで５秒間放電したときの最小値である。
結果を第３表に示す。データはｎ＝12である。単位は電
圧（Ｖ）である。A comparison was made between the battery of the present invention having a pattern as shown in FIG. 2 on the punch surface on which the lithium 44 was pressed and the conventional battery without the pattern and the closing voltage at each discharge depth. The closing voltage is measured at -10 ° C,
This is the minimum value when the battery is discharged for 5 seconds with a load resistance of 500Ω.
The results are shown in Table 3. The data is n = 12. The unit is voltage (V).
表３より明らかなように、本発明電池は従来電池に比
べて、放電深度毎の閉路電圧が高く、かつバラツキも小
さく優れていることがわかる。 As is clear from Table 3, the battery of the present invention is superior to the conventional battery in that the closed-circuit voltage at each depth of discharge is high, and the variation is small.
すなわち、放電深度毎の大電流パルス特性が優れてい
る。That is, the large current pulse characteristics for each discharge depth are excellent.
また、負極缶にネット溶接されている場合やリチウム
以外の軟質軽金属を負極活物質として用いる場合にも本
発明は適用でき効果がある。The present invention is also applicable and effective when the electrode is net welded to the negative electrode can or when a soft light metal other than lithium is used as the negative electrode active material.
以上の説明からも明らかなように、本発明において
は、圧着面に凹凸を有する模様を設けた圧着パンチによ
り、負極活物質と負極缶を密着して、負極活物質の反応
面積を大きくしているので、大電流パルス特性に優れた
非水電解液電池を提供することができる。As is clear from the above description, in the present invention, the negative electrode active material and the negative electrode can are brought into close contact with each other by a pressure bonding punch provided with a pattern having irregularities on the pressure bonding surface, thereby increasing the reaction area of the negative electrode active material. Therefore, it is possible to provide a non-aqueous electrolyte battery having excellent large current pulse characteristics.
第１図，第２図は本発明を適用した圧着パンチ面の模様
を示す第１の実施例、および第２の実施例、第３図，第
４図は本発明を適用した非水電解液電池の第一の実施
例、および第二の実施例を示す断面図である。 31,41……正極缶 32,42……正極合剤 33,43……セパレータ 34,44……リチウム 35,45……負極缶 36,37……封口材 45……ガスケット1 and 2 show a first embodiment showing a pattern of a press-bonded punch surface to which the present invention is applied, and FIGS. 3 and 4 show non-aqueous electrolytes to which the present invention is applied. It is sectional drawing which shows the 1st Example and 2nd Example of a battery. 31,41 Positive electrode can 32,42 Positive electrode mixture 33,43 Separator 34,44 Lithium 35,45 Negative electrode can 36,37 Sealing material 45 Gasket
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H01M 4/06 - 4/12 H01M 6/16Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) H01M 4/06-4/12 H01M 6/16
Claims (2)
間にあり中央部から外周に通じる切欠部を有する圧着パ
ンチで負極活物質を押圧し、前記負極活物質と負極缶を
密着することを特徴とする非水電解液電池。1. A negative electrode active material is pressed by a pressure bonding punch having a plurality of protrusions on a pressing surface and a notch between the plurality of protrusions and extending from a central portion to an outer periphery. A non-aqueous electrolyte battery characterized in that it adheres closely.
ンチで、負極活物質上に載置されたセパレータの上から
負極活物質を押圧することにより、前記負極活物質と負
極缶を密着することを特徴とする非水電解液電池。2. The negative electrode active material and the negative electrode can are brought into close contact with each other by pressing the negative electrode active material from above a separator placed on the negative electrode active material with a pressure bonding punch provided with a pattern having irregularities on the pressure bonding surface. Non-aqueous electrolyte battery characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63068971A JP2816975B2 (en) | 1988-03-23 | 1988-03-23 | Non-aqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63068971A JP2816975B2 (en) | 1988-03-23 | 1988-03-23 | Non-aqueous electrolyte battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01241751A JPH01241751A (en) | 1989-09-26 |
| JP2816975B2 true JP2816975B2 (en) | 1998-10-27 |
Family
ID=13389065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63068971A Expired - Lifetime JP2816975B2 (en) | 1988-03-23 | 1988-03-23 | Non-aqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2816975B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012014840A (en) * | 2010-06-29 | 2012-01-19 | Panasonic Corp | Coin cell and method of manufacturing the same |
| CN113328210B (en) * | 2021-05-27 | 2022-09-27 | 贵州梅岭电源有限公司 | Lithium metal negative plate of lithium battery and preparation method thereof |
| CN113328211B (en) * | 2021-05-27 | 2022-09-27 | 贵州梅岭电源有限公司 | High-energy-density lithium primary battery negative plate and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5521865A (en) * | 1978-08-03 | 1980-02-16 | Yuasa Battery Co Ltd | Preparation of cathode for flat lithium battery |
| JPS5846574A (en) * | 1981-09-11 | 1983-03-18 | Fuji Elelctrochem Co Ltd | Nonaqueous electrolyte battery and its manufacture |
| JPS63313468A (en) * | 1987-06-16 | 1988-12-21 | Toshiba Battery Co Ltd | Manufacture of flat type nonaqueous electrolyte battery |
-
1988
- 1988-03-23 JP JP63068971A patent/JP2816975B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01241751A (en) | 1989-09-26 |
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