JP2987178B2 - Non-aqueous electrolyte secondary battery - Google Patents
Non-aqueous electrolyte secondary batteryInfo
- Publication number
- JP2987178B2 JP2987178B2 JP2222066A JP22206690A JP2987178B2 JP 2987178 B2 JP2987178 B2 JP 2987178B2 JP 2222066 A JP2222066 A JP 2222066A JP 22206690 A JP22206690 A JP 22206690A JP 2987178 B2 JP2987178 B2 JP 2987178B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- positive electrode
- aqueous electrolyte
- secondary battery
- electrolyte secondary
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、非水電解液二次電池に関し、特に、負極
活物質にリチウム、電解液に非水電解液を使用した非水
電解液二次電池に関するものである。The present invention relates to a non-aqueous electrolyte secondary battery, and more particularly to a non-aqueous electrolyte secondary battery using lithium as a negative electrode active material and a non-aqueous electrolyte as an electrolyte. It relates to the next battery.
［従来の技術］ 負極活物質にリチウムを、電解液に非水電解液を使用
した非水電解液電池は、高エネルギー密度、高電圧、長
期保存性などに優れ、メモリーバックアップ用電源や、
通信機用電源などに広く利用されている。ところで、従
来の非水電解液電池は、通常一次電池であることから、
各種電源に再充電可能で経済性に優れる非水電解液二次
電池への要望が多い。[Prior art] A non-aqueous electrolyte battery using lithium as a negative electrode active material and a non-aqueous electrolyte as an electrolyte is excellent in high energy density, high voltage, long-term storage property, etc.
Widely used for power supplies for communication equipment. By the way, conventional non-aqueous electrolyte batteries are usually primary batteries,
There are many demands for non-aqueous electrolyte secondary batteries that can be recharged to various power sources and are excellent in economic efficiency.
従来、通常の円筒形非水電解液一次電池の正極は、ラ
スメタル上に正極活物質を塗着し、ローラによりプレス
され、中央部に集電端子を取付けられた構成になってい
る。また、二次電池の正極構造として、アルミなどの金
属箔に正極活物質を塗着、プレスする方法によるものが
検討されている。Conventionally, the positive electrode of a normal cylindrical non-aqueous electrolyte primary battery has a configuration in which a positive electrode active material is applied on a lath metal, pressed by a roller, and a current collecting terminal is attached to a central portion. As a positive electrode structure of a secondary battery, a method of applying a positive electrode active material to a metal foil such as aluminum and pressing the same has been studied.
［発明が解決しようとする課題］ ところが、二次電池は一次電池と同様の放電電流値を
要求される上に、充放電を繰返すため、電極面積を大き
くし、単位面積当たりの電流値を小さくする必要があ
る。しかし、従来の正極構造では、薄く、面積の大きい
ものは得られない。また、リチウムを負極活物質とする
円筒形非水電解液二次電池が実用に至っていない原因と
して、リチウムの劣化が挙げられる。二次電池の充放電
の繰返しにより、負極リチウム表面上に局部的デンドラ
イトが発生してセパレータを突抜け、正極と接触して短
絡してしまう。このことが原因で長寿命の非水電解液二
次電池を得ることができない。[Problems to be Solved by the Invention] However, the secondary battery is required to have the same discharge current value as the primary battery, and furthermore, since charge and discharge are repeated, the electrode area is increased and the current value per unit area is reduced. There is a need to. However, the conventional positive electrode structure cannot provide a thin and large area. In addition, one of the reasons why the cylindrical non-aqueous electrolyte secondary battery using lithium as the negative electrode active material has not been put to practical use is deterioration of lithium. Due to repeated charge and discharge of the secondary battery, local dendrite is generated on the surface of the negative electrode lithium, penetrates through the separator, and contacts the positive electrode to cause a short circuit. For this reason, a long-life non-aqueous electrolyte secondary battery cannot be obtained.
この発明は上記のような問題点を解消するためになさ
れたもので、負極表面上にデンドライトが発生して局部
的に短絡が発生しても、その短絡を最小限でおさえ、短
絡を解消することができ、なおかつ、薄く、軽く、強
く、電極面積の大きい正極を備えた非水電解液二次電池
を得ることを目的とする。The present invention has been made in order to solve the above problems, and even if a dendrite is generated on the negative electrode surface and a local short circuit occurs, the short circuit is minimized and the short circuit is eliminated. It is an object of the present invention to obtain a nonaqueous electrolyte secondary battery provided with a positive electrode that is thin, light, strong, and has a large electrode area.
［課題を解決するための手段］ この発明に係る非水電解液二次電池は、プラスチック
基板の片面もしくは両面に金属蒸着膜を形成し、さらに
その上に、再充電可能な正極活物質を、一定のパターン
で多数の独立小区画状にコーティングしてなる正極板を
備えている。[Means for Solving the Problems] The non-aqueous electrolyte secondary battery according to the present invention forms a metal deposition film on one or both surfaces of a plastic substrate, and further comprises a rechargeable positive electrode active material thereon. It has a positive electrode plate coated in a number of independent small sections in a fixed pattern.
［作 用］ この発明においては、二次電池の充放電中に電流の局
部的短絡が生じると、短絡した小区画正極（セグメント
電池）にはＡ（アンペア）オーダーの電流が流れ、当該
セグメント電池は周りの正極活物質のコーティングして
いない金属蒸着膜部分が焼損し、他のセグメント電池か
ら電気的に切離されて局部的短絡が解消する。[Operation] In the present invention, when a local short-circuit of current occurs during charging / discharging of a secondary battery, an A (ampere) order current flows through the short-circuited small section positive electrode (segment battery), and the segment battery is charged. In this case, the surrounding metal-deposited film portion not coated with the positive electrode active material burns out, and is electrically disconnected from other segment batteries to eliminate a local short circuit.
［実施例］ 第１図〜第３図はこの発明の一実施例を示し、プラス
チック基板（１）の両面に金属蒸着膜（２）が形成さ
れ、その上に再充電可能な正極活物質（３）が、一定の
パターンで独立小区画状にコーティングされ、正極板を
形成している。この正極板は、セパレータ（４）を介し
て、リチウムを主体とする負極活物質（６）およびスペ
ーサ（５）とともにスパイラル状に巻かれ、メタライジ
ング（７）を施したものを負極缶（電池缶）（８）内に
収容される。（９）はガスケット、（10）は針刺し封口
体である。[Embodiment] FIGS. 1 to 3 show an embodiment of the present invention, in which a metal deposition film (2) is formed on both surfaces of a plastic substrate (1), and a rechargeable positive electrode active material ( 3) is coated in a fixed pattern in the shape of independent small sections to form a positive electrode plate. This positive electrode plate is spirally wound together with a negative electrode active material (6) mainly composed of lithium and a spacer (5) via a separator (4), and subjected to metallizing (7). (8). (9) is a gasket, and (10) is a needle stick seal body.
ここで、独立小区画状の正極（３）から形成される電
池部分を、セグメント電池と呼ぶことにする。Here, the battery part formed from the positive electrode (3) in the shape of an independent small section is referred to as a segment battery.
次に作用について説明する。以上のようなセグメント
電池では、もし局部的短絡が発生しても、当該セグメン
ト電池が他のセグメント電池と切離されているため、他
のセグメント電池に影響を与えることがない。例えば、
この二次電池の充放電中に局部的短絡が発生したとす
る。通常、セグメント電池当たりμＡ〜mAオーダーで流
れる電流が、局部的短絡時、短絡した当該セグメント電
池にはＡオーダーの電流が流れ、当該セグメント電池の
周りの正極活物質（３）のコーティングしていない金属
蒸着膜（２）の部分が焼損し、他のセグメント電池から
電気的に切離されて局部的短絡は解消し、全体としての
電池反応には影響がない。Next, the operation will be described. In the above segment battery, even if a local short circuit occurs, the segment battery is separated from the other segment batteries, and thus does not affect the other segment batteries. For example,
It is assumed that a local short circuit occurs during charging and discharging of the secondary battery. Normally, a current flowing on the order of μA to mA per segment battery flows during a local short circuit, and a current on the order of A flows through the short-circuited segment battery, and the positive electrode active material (3) around the segment battery is not coated. The portion of the metal deposition film (2) burns out and is electrically disconnected from the other segment batteries, eliminating the local short circuit, and does not affect the battery reaction as a whole.
ただし、この構成において、極めて小容量の空間とは
いえ、発熱により金属膜（２）が焼損切断することが動
作の基本になっており、この局部高温状態が電解液の発
熱、発火、暴走を誘起するようなことは絶対にあつては
ならず、電解液の選定に当たってこのことを充分考慮し
なければならない。However, in this configuration, although the space has a very small capacity, the operation is based on the fact that the metal film (2) is burned and cut by heat generation. This locally high temperature state causes heat generation, ignition and runaway of the electrolyte. Induction should never be considered, and this must be taken into account when selecting the electrolyte.
以上説明したこの発明による電池においては、金属蒸
着膜（２）の電流容量が小さいために、スパイラル構造
の軸方向に電流を取出さなければならない。図におい
て、メタライジング（７）を施しているのは、軸方向に
電流を集合して取出すための電流路構造としているもの
である。In the battery according to the present invention described above, since the current capacity of the metal deposition film (2) is small, it is necessary to extract a current in the axial direction of the spiral structure. In the drawing, the metallizing (7) has a current path structure for collecting and extracting current in the axial direction.
なお、金属蒸着膜（２）は、プラスチック基板（１）
の片面のみに形成したものでもよい。The metal deposition film (2) is a plastic substrate (1)
May be formed only on one side.
［発明の効果］ 以上の説明から明らかなように、この発明は、プラス
チック基板上に形成した金属蒸着膜の上に正極活物質を
各独立した複数の小区画に一定のパターンでコーティン
グ形成した正極板を備えたことにより、薄く、軽く、強
く、かつ、面積の大きい電極が得られるに加え、電池内
で短絡が生じても影響を最小限におさえて短絡を解消す
ることができ、充放電サイクル寿命および性能を向上す
ることができる。[Effects of the Invention] As is apparent from the above description, the present invention provides a positive electrode in which a positive electrode active material is formed by coating a plurality of independent small sections in a fixed pattern on a metal deposition film formed on a plastic substrate. By providing a plate, a thin, light, strong, and large-area electrode can be obtained, and even if a short circuit occurs in the battery, the effect can be minimized and the short circuit can be eliminated. Cycle life and performance can be improved.
第１図〜第３図はこの発明の一実施例を示し、第１図は
要部の平面図、第２図は電極をスパイラル状に巻いた状
態の断面図、第３図は第２図のものを電池缶に収納した
状態の断面図である。 （１）……プラスチック基板、（２）……金属蒸着膜、
（３）……正極活物質、（４）……セパレータ、（６）
……負極活物質、（８）……負極缶（電池缶）。 なお、各図中、同一符号は同一又は相当部分を示す。1 to 3 show an embodiment of the present invention. FIG. 1 is a plan view of a main part, FIG. 2 is a sectional view of a state in which electrodes are spirally wound, and FIG. 3 is FIG. FIG. 6 is a cross-sectional view of a state in which the above-mentioned is stored in a battery can. (1) ... plastic substrate, (2) ... metal deposition film,
(3) Positive electrode active material, (4) Separator, (6)
... Negative electrode active material, (8) Negative electrode can (battery can). In the drawings, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 須藤 尚志 千葉県松戸市稔台333番地 東洋高砂乾 電池株式会社開発部内 (72)発明者 平井 実 千葉県松戸市稔台333番地 東洋高砂乾 電池株式会社開発部内 (56)参考文献 特開 昭50−12540（ＪＰ，Ａ) 特開 昭60−216471（ＪＰ，Ａ) 特開 平３−37970（ＪＰ，Ａ) 特開 平３−71555（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01M 10/40 H01M 4/02 H01M 2/34 H01M 10/04 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoshi Sudo 333, Minorudai, Matsudo-shi, Chiba Prefecture Toyo Takasago Dry Battery Co., Ltd. (56) References JP-A-50-12540 (JP, A) JP-A-60-216471 (JP, A) JP-A-3-37970 (JP, A) JP-A-3-71555 (JP, A) (58) Field surveyed (Int.Cl. 6 , DB name) H01M 10/40 H01M 4/02 H01M 2/34 H01M 10/04
Claims (1)
となる正極板とがセパレータを介してスパイラルに巻か
れて電池缶内に収納されている非水電解液二次電池にお
いて、少なくとも片面に金属蒸着膜が形成されたプラス
チック基板上に、各独立した小区画の複数の正極活物質
が一定のパターンでコーティングされた前記正極板を備
えてなることを特徴とする非水電解液二次電池。1. A non-aqueous electrolyte secondary battery in which a negative electrode plate mainly composed of lithium and a rechargeable positive electrode plate are spirally wound via a separator and housed in a battery can, at least one side of which is provided. Non-aqueous electrolyte secondary characterized by comprising a positive electrode plate coated with a plurality of positive electrode active materials in independent small sections in a fixed pattern on a plastic substrate on which a metal deposition film is formed. battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2222066A JP2987178B2 (en) | 1990-08-21 | 1990-08-21 | Non-aqueous electrolyte secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2222066A JP2987178B2 (en) | 1990-08-21 | 1990-08-21 | Non-aqueous electrolyte secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04104478A JPH04104478A (en) | 1992-04-06 |
| JP2987178B2 true JP2987178B2 (en) | 1999-12-06 |
Family
ID=16776579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2222066A Expired - Fee Related JP2987178B2 (en) | 1990-08-21 | 1990-08-21 | Non-aqueous electrolyte secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2987178B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3283805B2 (en) * | 1997-10-14 | 2002-05-20 | 日本碍子株式会社 | Lithium secondary battery |
| GB2575789B (en) | 2018-07-20 | 2021-11-03 | Dyson Technology Ltd | Energy storage device |
| GB2575788B (en) | 2018-07-20 | 2022-02-09 | Dyson Technology Ltd | Energy storage device |
-
1990
- 1990-08-21 JP JP2222066A patent/JP2987178B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04104478A (en) | 1992-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |