JPH0737594A - Lithium battery - Google Patents
Lithium batteryInfo
- Publication number
- JPH0737594A JPH0737594A JP19905793A JP19905793A JPH0737594A JP H0737594 A JPH0737594 A JP H0737594A JP 19905793 A JP19905793 A JP 19905793A JP 19905793 A JP19905793 A JP 19905793A JP H0737594 A JPH0737594 A JP H0737594A
- Authority
- JP
- Japan
- Prior art keywords
- separator
- surrounded
- battery
- positive plate
- electrode plate
- 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.)
- Granted
Links
Classifications
-
- Y02E60/12—
Landscapes
- Cell Separators (AREA)
- Primary Cells (AREA)
Abstract
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。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 In a conventional lithium battery, a positive electrode plate formed by pressure-bonding a positive electrode active material obtained by mixing manganese dioxide with acetylene black as a conductive agent to a current collector, and a negative electrode plate mainly containing metallic lithium. It is laminated by interposing a microporous membrane 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。In such a lithium battery, when an internal short circuit occurs, the micropores of the separator are closed due to the temperature rise, and the 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, since the strength of the separator is small, there is a problem that the separator is damaged during the 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 separator has a small electrolytic solution holding ability, there is a problem that the discharge capacity is reduced in the 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、微孔膜からなるセパレータで包囲された
正極板を不織布からなるセパレータで包囲し、この2層
のセパレータで包囲された正極板とリチウムを主体とす
る負極板とを交互に積層してなるものである。In order to solve the above-mentioned problems, according to the present invention, a positive electrode plate surrounded by a separator made of a microporous membrane is surrounded by a separator made of a non-woven fabric and surrounded by a two-layer separator. The positive electrode plate and the negative electrode plate mainly containing lithium are alternately laminated.
【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。[Operation] Therefore, according to the present invention, the electrolytic solution can be held by the separator made of the non-woven fabric, and the increase of the short-circuit current can be suppressed by the separator made of the microporous membrane.
【0008】また、本発明は、微孔膜からなるセパレー
タで内部抵抗の高い正極板を包囲しているので、内部短
絡の発生時に正極板の温度が急速に高くなり、その温度
によって微孔膜の微孔が閉塞され、電池温度の上昇を小
さくすることができる。Further, according to the present invention, since the positive electrode plate having a high internal resistance is surrounded by the separator made of the microporous film, the temperature of the positive electrode plate rapidly rises when an internal short circuit occurs, and the temperature causes the microporous film to rise. The micropores of the battery are closed, and the rise in battery temperature can be reduced.
【0009】[0009]
【実施例】以下、本発明を実施例に基づいて説明する。EXAMPLES The present invention will be described below based on examples.
【0010】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 the lithium battery of the present invention.
【0011】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は内側を微孔膜からなるセパレータ3
で包囲し、外側を不織布からなるセパレータ4で包囲し
てなる。In FIG. 1, 1 is a positive electrode plate in which a positive electrode active material obtained by mixing manganese dioxide with acetylene black is pressure-bonded to a current collector, and 2 is a negative electrode plate made of a metal lithium sheet. Separator 3 consisting of a porous film
And the outside is surrounded by a separator 4 made of a non-woven fabric.
【0012】そして、前記2層のセパレータで包囲され
た正極板1と、前記負極板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。The positive electrode plate 1 surrounded by the two-layer separator and the negative electrode plate 2 are alternately laminated and housed in a stainless steel battery case 5 together with an electrolytic solution containing propylene carbonate as a main component. Become. In FIG. 1, 6 is a positive electrode terminal and 7 is a negative electrode terminal.
【0013】前記正極板1は先に微孔膜からなるセパレ
ータ3で包囲してから不織布からなるセパレータ4で包
囲するようにしたが、あらかじめ微孔膜からなるセパレ
ータ3が内側に、不織布からなるセパレータ4が外側に
なるように重ね合わせてから周囲を熱溶着して袋状に
し、その中に前記正極板1を挿入してもよい。The positive electrode plate 1 is first surrounded by the separator 3 made of a microporous membrane and then surrounded by the separator 4 made of a non-woven fabric. The separator 3 made of a microporous membrane is made of a non-woven fabric inside in advance. The positive electrode plate 1 may be inserted into the bag by stacking the separators 4 so that the separators are on the outside and then heat-sealing the periphery to form a bag.
【0014】上記した構造のリチウム電池では、何らか
の原因で内部短絡が発生した場合、最初に内部抵抗の高
い正極板1の温度が高くなり、それによって微孔膜から
なるセパレータ3の微孔が閉塞されて電池温度の上昇を
抑制することができる。In the lithium battery having the above-described structure, when an internal short circuit occurs for some reason, the temperature of the positive electrode plate 1 having a high internal resistance first rises, thereby closing the fine pores of the separator 3 made of a fine pore film. As a result, the battery temperature can be prevented from rising.
【0015】また、上記した構造のリチウム電池では、
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。In the lithium battery having the above structure,
Since the non-woven fabric can hold the electrolytic solution, the problem of lowering the discharge capacity does not occur even in a sealed battery in which the amount of the electrolytic solution is limited.
【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50個ず
つ作製し、そのうち各25個について、端子間を短絡し
て表面温度を比較したところ、本発明電池は最高温度が
80℃〜85℃であったのに対し、従来電池は最高温度
が85℃〜90℃であった。Next, 50 batteries each of the above-mentioned battery of the present invention and a conventional battery in which only a microporous film was arranged as a separator were prepared, and the surface temperature of each 25 batteries was compared by short-circuiting the terminals. The maximum temperature of the battery of the present invention was 80 ° C to 85 ° C, whereas the maximum temperature of the conventional battery was 85 ° C to 90 ° C.
【0017】また、上記した各電池の容量は10AHで
あり、それぞれ残りの25個について、10mAの放電
電流で放電してその放電容量を比較したところ、本発明
電池は従来電池に比較して約20%放電容量が増大する
ことがわかった。The capacity of each of the above-mentioned batteries was 10 AH, and the remaining 25 batteries were discharged at a discharge current of 10 mA and their discharge capacities were compared. It was found that the discharge capacity increased by 20%.
【0018】[0018]
【発明の効果】上記したとおりであるから、本発明電池
は内部短絡の発生時に電池温度の上昇を小さくすること
ができ、しかも不織布からなる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、電池の性能の向上を図ることができる。As described above, according to the battery of the present invention, the temperature rise of the battery can be suppressed when an internal short circuit occurs, and the discharge time can be lengthened by holding the electrolytic solution in the separator made of nonwoven fabric. Therefore, the performance of the battery can be improved.
【図1】本発明のリチウム電池の断面図である。FIG. 1 is a cross-sectional view of a lithium battery of the present invention.
1 正極板 2 負極板 3 微孔膜からなるセパレータ 4 不織布からなるセパレータ 5 電槽 DESCRIPTION OF SYMBOLS 1 Positive electrode plate 2 Negative electrode plate 3 Separator consisting of microporous membrane 4 Separator consisting of non-woven fabric 5 Battery case
Claims (1)
正極板を不織布からなるセパレータで包囲し、この2層
のセパレータで包囲された正極板とリチウムを主体とす
る負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 positive electrode plate surrounded by a separator made of a microporous membrane is surrounded by a separator made of a non-woven fabric, and the positive electrode plate surrounded by the two-layer separator and the negative electrode plate mainly containing lithium are alternately laminated. A lithium battery characterized in that
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19905793A JP2874529B2 (en) | 1993-07-16 | 1993-07-16 | Lithium battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19905793A JP2874529B2 (en) | 1993-07-16 | 1993-07-16 | Lithium battery |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0737594A true JPH0737594A (en) | 1995-02-07 |
JP2874529B2 JP2874529B2 (en) | 1999-03-24 |
Family
ID=16401391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19905793A Expired - Fee Related JP2874529B2 (en) | 1993-07-16 | 1993-07-16 | Lithium battery |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2874529B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007250414A (en) * | 2006-03-17 | 2007-09-27 | Hitachi Maxell Ltd | Cylindrical nonaqueous electrolyte solution battery |
US8021775B2 (en) * | 2001-07-13 | 2011-09-20 | Inventek Corporation | Cell structure for electrochemical devices and method of making same |
-
1993
- 1993-07-16 JP JP19905793A patent/JP2874529B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8021775B2 (en) * | 2001-07-13 | 2011-09-20 | Inventek Corporation | Cell structure for electrochemical devices and method of making same |
JP2007250414A (en) * | 2006-03-17 | 2007-09-27 | Hitachi Maxell Ltd | Cylindrical nonaqueous electrolyte solution battery |
Also Published As
Publication number | Publication date |
---|---|
JP2874529B2 (en) | 1999-03-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |