JP2874527B2 - Lithium battery - Google Patents
Lithium batteryInfo
- Publication number
- JP2874527B2 JP2874527B2 JP19417793A JP19417793A JP2874527B2 JP 2874527 B2 JP2874527 B2 JP 2874527B2 JP 19417793 A JP19417793 A JP 19417793A JP 19417793 A JP19417793 A JP 19417793A JP 2874527 B2 JP2874527 B2 JP 2874527B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- separator
- lithium battery
- battery
- surrounded
- 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
Links
- 229910052744 lithium Inorganic materials 0.000 title claims description 16
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims description 14
- 239000004745 nonwoven fabric Substances 0.000 claims description 10
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 description 6
- 239000012982 microporous membrane Substances 0.000 description 6
- -1 polypropylene Polymers 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 4
- 239000008151 electrolyte solution Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- Y02E60/12—
Landscapes
- Primary Cells (AREA)
- Cell Separators (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はリチウム電池に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithium battery.
【０００２】[0002]
【従来の技術】従来のリチウム電池は、二酸化マンガン
に導電剤としてのアセチレンブラックなどを混合した正
極活物質が集電体に圧着されてなる正極板と、金属リチ
ウムを主体とする負極板とがセパレータとしての微孔膜
を介して積層されてなるものである。2. Description of the Related Art A conventional lithium battery is composed of a positive electrode plate in which a positive electrode active material obtained by mixing acetylene black or the like as a conductive agent with manganese dioxide is bonded to a current collector, and a negative electrode plate mainly composed of lithium metal. They are laminated via a microporous film as a separator.
【０００３】このようなリチウム電池では、内部短絡の
発生時に、その温度上昇によって前記セパレータの微孔
を閉塞し、短絡電流の増大を抑制することができる。[0003] In such a lithium battery, when an internal short circuit occurs, the micropores of the separator are closed by the rise in temperature, and an increase in short circuit current can be suppressed.
【０００４】[0004]
【発明が解決しようとする課題】上記した従来のリチウ
ム電池では、セパレータの強度が小さいので、製造時に
セパレータが破損して内部短絡が発生しやすいという問
題があった。In the above-mentioned conventional lithium battery, there is a problem that since the strength of the separator is small, the separator is damaged at the time of manufacturing and an internal short circuit is likely to occur.
【０００５】また、上記した従来のリチウム電池では、
セパレータの電解液保持能力が小さいため、電解液量が
制限された密閉形の電池では放電容量が低下するという
問題があった。Further, in the above-mentioned conventional lithium battery,
Since the capacity of the separator for holding the electrolytic solution is small, there is a problem that the discharge capacity is reduced in a sealed battery in which the amount of the electrolytic solution is limited.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、不織布からなるセパレータで包囲された
第１極板と、微孔膜からなるセパレータで包囲された第
２極板とを交互に積層したことを特徴とするものであ
る。In order to solve the above problems, the present invention provides a first electrode plate surrounded by a separator made of non-woven fabric and a second electrode plate surrounded by a separator made of microporous film. It is characterized by being alternately stacked.
【０００７】[0007]
【作 用】従って、本発明は、不織布からなるセパレー
タによって電解液を保持させることができ、微孔膜から
なるセパレータによって短絡電流の増大を抑制すること
ができる。According to the present invention, the electrolyte can be held by the non-woven fabric separator, and the increase in short-circuit current can be suppressed by the microporous membrane separator.
【０００８】[0008]
【実施例】以下、本発明を実施例に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
【０００９】図１は、本発明のリチウム電池の断面図で
ある。FIG. 1 is a sectional view of a lithium battery according to the present invention.
【００１０】図１において、１は二酸化マンガンにアセ
チレンブラックを混合した正極活物質が集電体に圧着さ
れた正極板、２は金属リチウムシートからなる負極板
で、前記正極板１はポリプロピレン製の不織布からなる
セパレータ３で包囲され、前記負極板２はポリプロピレ
ン製の微孔膜からなるセパレータ４で包囲されてなる。In FIG. 1, reference numeral 1 denotes a positive electrode plate in which a positive electrode active material in which acetylene black is mixed with manganese dioxide is pressed to a current collector, 2 denotes a negative electrode plate made of a metal lithium sheet, and the positive electrode plate 1 is made of polypropylene. The negative electrode plate 2 is surrounded by a separator 4 made of a microporous membrane made of polypropylene.
【００１１】そして、前記不織布からなるセパレータ３
で包囲された正極板１と、前記微孔膜からなるセパレー
タ４で包囲された負極板２とは交互に積層されてステン
レス製の電槽５内にプロピレンカーボネートを主体とす
る電解液とともに収納されてなる。なお、図１におい
て、６は正極端子、７は負極端子である。Then, the separator 3 made of the nonwoven fabric is used.
And the negative electrode plate 2 surrounded by the separator 4 made of the microporous film are alternately laminated and stored in a stainless steel container 5 together with an electrolyte mainly composed of propylene carbonate. It becomes. In FIG. 1, 6 is a positive terminal and 7 is a negative terminal.
【００１２】上記した構造のリチウム電池では、微孔膜
からなるセパレータ４が破損していても、不織布からな
るセパレータ３によって内部短絡の発生を防止すること
ができる。In the lithium battery having the above structure, even if the separator 4 made of a microporous membrane is damaged, the occurrence of an internal short circuit can be prevented by the separator 3 made of a nonwoven fabric.
【００１３】また、何らかの原因で内部短絡が発生して
電池温度が上昇しても、微孔膜からなるセパレータ４の
微孔を閉塞させることによって短絡電流の増大を抑制す
ることができる。Further, even if an internal short circuit occurs for some reason and the battery temperature rises, an increase in short circuit current can be suppressed by closing the micropores of the separator 4 composed of a microporous film.
【００１４】また、電解液を不織布に保持させることが
できるので、電解液量が制限された密閉形の電池であっ
ても放電容量が低下するという問題が生じることはな
い。Further, since the electrolyte can be held on the nonwoven fabric, there is no problem that the discharge capacity is reduced even in a sealed battery in which the amount of the electrolyte is limited.
【００１５】なお、上記した実施例では、正極板１をポ
リプロピレン製の不織布からなるセパレータ３で包囲
し、負極板２をポリプロピレン製の微孔膜からなるセパ
レータ４で包囲したが、正極板１をポリプロピレン製の
微孔膜からなるセパレータ４で包囲し、負極板２をポリ
プロピレン製の不織布からなるセパレータ３で包囲して
もよいことは言うまでもない。In the above embodiment, the positive electrode plate 1 is surrounded by the separator 3 made of a nonwoven fabric made of polypropylene, and the negative electrode plate 2 is surrounded by the separator 4 made of a microporous film made of polypropylene. It goes without saying that the negative electrode plate 2 may be surrounded by a separator 3 made of a nonwoven fabric made of polypropylene, while the negative electrode plate 2 may be surrounded by a separator 4 made of a polypropylene microporous film.
【００１６】次に、上記した本発明電池と微孔膜のみを
セパレータとして配した従来電池とをそれぞれ２００個
ずつ作製し、作製時の短絡発生状況を調査をしたとこ
ろ、従来電池は２個の電池に短絡が発生していたのに対
し、本発明電池には短絡は発生していなかった。Next, 200 batteries each of the above-described battery of the present invention and a conventional battery in which only the microporous membrane was used as a separator were manufactured, and the state of occurrence of short circuit at the time of manufacturing was investigated. While a short circuit occurred in the battery, no short circuit occurred in the battery of the present invention.
【００１７】また、上記した各電池の容量は１０Ａｈで
あり、本発明電池および従来電池を２００ｍＡの電流で
放電したところ、従来電池の平均放電時間は５１７時間
（４８０時間〜５２３時間）であったのに対し、本発明
電池の平均放電時間は５６３時間（５４１時間〜５７７
時間）であったことがわかった。The capacity of each of the above batteries was 10 Ah. When the battery of the present invention and the conventional battery were discharged at a current of 200 mA, the average discharge time of the conventional battery was 517 hours (480 hours to 523 hours). On the other hand, the average discharge time of the battery of the present invention is 563 hours (541 hours to 577 hours).
Hours).
【００１８】[0018]
【発明の効果】上記したとおりであるから、本発明電池
は、不織布からなるセパレータによって作製時の短絡発
生を防止することができ、しかもそのセパレータに電解
液を保持させることによって放電時間を長くすることが
できるので、生産性の向上と性能の向上を図ることがで
きる。As described above, the battery of the present invention can prevent the occurrence of a short circuit at the time of production by the separator made of non-woven fabric, and can prolong the discharge time by holding the electrolytic solution in the separator. Therefore, productivity and performance can be improved.
【００１９】また、本発明電池は、内部短絡の発生時に
微孔膜からなるセパレータの微孔を閉塞することによっ
て短絡電流の増大を抑制することができるので、安全性
の向上を図ることができる。In the battery of the present invention, an increase in short-circuit current can be suppressed by closing the micropores of the microporous membrane separator when an internal short-circuit occurs, thereby improving safety. .
【図１】本発明のリチウム電池の断面図である。FIG. 1 is a sectional view of a lithium battery of the present invention.
１ 正極板 ２ 負極板 ３ 不織布からなるセパレータ ４ 微孔膜からなるセパレータ ５ 電槽 DESCRIPTION OF SYMBOLS 1 Positive electrode plate 2 Negative electrode plate 3 Nonwoven fabric separator 4 Microporous membrane separator 5 Battery case
Claims (3)
第１極板と、微孔膜からなるセパレータで包囲された第
２極板とを交互に積層したことを特徴とするリチウム電
池。1. A lithium battery comprising a first electrode plate surrounded by a separator made of a nonwoven fabric and a second electrode plate surrounded by a separator made of a microporous film, which are alternately laminated.
正極板であり、第２極板が金属リチウムを主体とする負
極板であることを特徴とする請求項第１項記載のリチウ
ム電池。2. The lithium battery according to claim 1, wherein the first electrode plate is a positive electrode plate mainly composed of manganese dioxide, and the second electrode plate is a negative electrode plate mainly composed of lithium metal. .
極板であり、第２極板が二酸化マンガンを主体とする正
極板であることを特徴とする請求項第１項記載のリチウ
ム電池。3. The lithium battery according to claim 1, wherein the first electrode plate is a negative electrode plate mainly composed of metallic lithium, and the second electrode plate is a positive electrode plate mainly composed of manganese dioxide. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19417793A JP2874527B2 (en) | 1993-07-09 | 1993-07-09 | Lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19417793A JP2874527B2 (en) | 1993-07-09 | 1993-07-09 | Lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0729578A JPH0729578A (en) | 1995-01-31 |
| JP2874527B2 true JP2874527B2 (en) | 1999-03-24 |
Family
ID=16320217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19417793A Expired - Fee Related JP2874527B2 (en) | 1993-07-09 | 1993-07-09 | Lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2874527B2 (en) |
-
1993
- 1993-07-09 JP JP19417793A patent/JP2874527B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0729578A (en) | 1995-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |