JPH08321297A - Protection circuit for non-aqueous electrolyte battery - Google Patents
Protection circuit for non-aqueous electrolyte batteryInfo
- Publication number
- JPH08321297A JPH08321297A JP7152466A JP15246695A JPH08321297A JP H08321297 A JPH08321297 A JP H08321297A JP 7152466 A JP7152466 A JP 7152466A JP 15246695 A JP15246695 A JP 15246695A JP H08321297 A JPH08321297 A JP H08321297A
- Authority
- JP
- Japan
- Prior art keywords
- protection circuit
- battery
- aqueous electrolyte
- electrolyte battery
- circuit
- 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.)
- Pending
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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、リチウム二次電池等
の非水電解液電池の過充電又は過放電を防止するための
保護回路及びその保護回路を備えた電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection circuit for preventing overcharge or overdischarge of a non-aqueous electrolyte battery such as a lithium secondary battery, and a battery provided with the protection circuit.
【０００２】[0002]
【従来の技術】近年、携帯用無線電話、携帯用パソコ
ン、携帯用ビデオカメラ等の電子機器が開発され、各種
電子機器が携帯可能な程度に小型化されている。それに
伴って、内蔵される電池としても、高エネルギー密度を
有し、且つ軽量なものが採用されている。そのような要
求を満たす典型的な電池は、リチウム金属、リチウム合
金、リチウムイオンを保持させた炭素等のリチウム系を
負極とし、ＬｉＣＩＯ4、ＬｉＰＦ6等のリチウム塩を溶
解した非プロトン性の有機溶媒を電解液とするリチウム
二次電池である。2. Description of the Related Art In recent years, electronic devices such as portable wireless telephones, portable personal computers and portable video cameras have been developed, and various electronic devices have been miniaturized to a portable size. Along with this, as a built-in battery, a battery having a high energy density and being lightweight is adopted. A typical battery satisfying such requirements has an aprotic organic material in which a lithium-based material such as lithium metal, a lithium alloy, or carbon that holds lithium ions is used as a negative electrode, and a lithium salt such as LiCIO 4 or LiPF 6 is dissolved. A lithium secondary battery using a solvent as an electrolytic solution.
【０００３】リチウム二次電池のように非水系の電解液
を用いた電池には、その電解液が可燃性且つ有害である
ことから、過充電又は過放電による急激な電池内圧上昇
に伴う爆発を防止するために、充放電を制御する保護回
路が備えられている。In a battery using a non-aqueous electrolyte such as a lithium secondary battery, the electrolyte is flammable and harmful, so that an explosion caused by a rapid increase in battery internal pressure due to overcharge or overdischarge. To prevent this, a protection circuit for controlling charge / discharge is provided.
【０００４】ところで、電池は、不測の事態により電解
液が漏れることがある。漏れた非水電解液が保護回路に
付着すると、電解液によってハンダ部やＩＣ素子のパッ
ケージケースが浸食されて保護回路が誤動作するばかり
か、導電配線に漏洩電流が流れ、それによって導電配線
が発熱して電解液に着火するおそれがある。そこで、保
護回路を電池とともに樹脂でモールドすることにより、
漏れた電解液が保護回路に付着するのを防止する技術が
提案されている（特開平４−３３１４２５号公報）。By the way, in a battery, the electrolyte may leak due to an unexpected situation. If the leaked non-aqueous electrolyte adheres to the protective circuit, the electrolytic solution will erode the solder part and the package case of the IC element, causing the protective circuit to malfunction and causing leakage current to flow through the conductive wiring, which causes the conductive wiring to heat up. The electrolyte may ignite. Therefore, by molding the protection circuit together with the battery with resin,
A technique for preventing the leaked electrolytic solution from adhering to the protection circuit has been proposed (JP-A-4-331425).
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記公報に記
載の技術によれば、樹脂を加熱して溶かした状態で保護
回路の周囲に成形するので、その樹脂の熱によって保護
回路を構成するＩＣチップ等の各電子部品が損傷するこ
とがある。従って、生産歩留まりが低い。However, according to the technique described in the above publication, since the resin is heated and melted to be molded around the protective circuit, the IC forming the protective circuit by the heat of the resin is formed. Each electronic component such as a chip may be damaged. Therefore, the production yield is low.
【０００６】この発明の目的は、構成部品を損傷させる
ことなく、電解液に浸食されない皮膜を表面に形成した
保護回路及び保護回路付き非水電解液電池を提供するこ
とにある。An object of the present invention is to provide a protective circuit having a film formed on its surface that is not corroded by an electrolytic solution and a non-aqueous electrolyte battery with a protective circuit, without damaging the components.
【０００７】[0007]
【課題を解決するための手段】その目的を達成するため
に、この発明の保護回路は、非水電解液電池の過充電又
は過放電を防止するために、その電池と接続され、その
表面が絶縁性及び耐薬品性に優れた皮膜で被覆されてい
ることを特徴とする。この皮膜としては、ポリパラキシ
レン樹脂によるコーティングがよい。In order to achieve the object, the protection circuit of the present invention is connected to a non-aqueous electrolyte battery in order to prevent overcharge or overdischarge, and its surface is It is characterized by being coated with a film having excellent insulation and chemical resistance. This film is preferably a coating of polyparaxylene resin.
【０００８】同じく、この発明の保護回路付き非水電解
液電池は、非水電解液電池と、その電池の過充電又は過
放電を防止するためにその電池に接続されるとともに、
表面が絶縁性及び耐薬品性に優れた皮膜で被覆された保
護回路と、電池及び保護回路を収納することを備えたこ
とを特徴とする。Similarly, the non-aqueous electrolyte battery with the protection circuit of the present invention is connected to the non-aqueous electrolyte battery and the battery in order to prevent over-charging or over-discharging of the battery.
It is characterized by comprising a protective circuit whose surface is coated with a film having excellent insulation and chemical resistance, and accommodating a battery and a protective circuit.
【０００９】[0009]
【作用】この発明の保護回路付き非水電解液電池によれ
ば、たとえその電解液が漏洩して保護回路に向かって流
れても、電解液が皮膜で遮断されるので、保護回路を浸
食しない。According to the non-aqueous electrolyte battery with a protection circuit of the present invention, even if the electrolyte leaks and flows toward the protection circuit, the electrolyte is blocked by the film, so that the protection circuit is not eroded. .
【００１０】[0010]
【実施例】この発明の実施例を図面とともに説明する。
図１は、保護回路付き非水電解液電池を示す断面図であ
る。保護回路付き非水電解液電池１は、電池本体２と保
護回路３とを備え、それらが１つの容器４に収納されて
なるものである。Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a non-aqueous electrolyte battery with a protection circuit. The non-aqueous electrolyte battery 1 with a protection circuit comprises a battery body 2 and a protection circuit 3, which are housed in a single container 4.
【００１１】電池本体２は、正極集電体に正極活物質を
保持させた正極、非水電解液を吸収させたポリエチレン
繊維からなるセパレータ、負極集電体に負極活物質を保
持させた負極（いずれも図示省略）を順に重ね合わせて
渦状に巻いて、ステンレス等の金属ケース内に収納した
ものである。正極集電体にＡｌ、正極活物質にＬｉＣｏ
Ｏ2、負極集電体にＣｕ、負極活物質に黒鉛、非水電解
液として六フッ化燐酸リチウムを炭酸エステルに溶解し
たものが用いられ、平均電圧は３．６Ｖで４００ｍＡｈ
の放電容量を有している。The battery main body 2 includes a positive electrode having a positive electrode current collector holding a positive electrode active material, a separator made of polyethylene fibers absorbing a non-aqueous electrolyte, and a negative electrode having a negative electrode current collector holding a negative electrode active material ( All of them are omitted in the drawing) and are wound in a spiral shape and housed in a metal case such as stainless steel. Al for the positive electrode current collector and LiCo for the positive electrode active material
O 2, Cu, graphite in the negative electrode active material, those obtained by dissolving lithium hexafluorophosphate in carbonate as the non-aqueous electrolyte used in the negative electrode current collector, the average voltage is 3.6V 400 mAh
It has a discharge capacity of.
【００１２】保護回路３は、ポリイミド基板上にＩＣ素
子、サーミスター素子等の電子部品を搭載し、上記電池
本体２の過充電及び過放電を防止するように回路形成さ
れて電池本体２に接続されている。The protection circuit 3 has electronic components such as IC elements and thermistor elements mounted on a polyimide substrate, and is formed in a circuit so as to prevent overcharging and overdischarging of the battery body 2 and connected to the battery body 2. Has been done.
【００１３】容器４は、合成樹脂製で、電池本体２及び
保護回路３を収納するとともに、内部を電池収納空間と
保護回路収納空間とに区分する間仕切り５を有する。容
器４の保護回路３側の一面には、外部端子６が露出して
いる。また、その面と交差する他の面には、後述するコ
ーティング剤を導入する直径１．５ｍｍの導入孔４１が
設けられている。ただし、導入孔４１を設ける面は、そ
の面に限らず、保護回路と対向する面であればよい。そ
して、間仕切り５には、電池収納空間と保護回路収納空
間とに連通する連通孔５１、５２が設けられており、そ
れら連通孔５１，５２に正極端子２１及び負極端子２２
が通されて、電池本体２と保護回路３とを接続してい
る。The container 4 is made of synthetic resin and contains the battery body 2 and the protection circuit 3, and also has a partition 5 which divides the interior into a battery storage space and a protection circuit storage space. The external terminal 6 is exposed on one surface of the container 4 on the protection circuit 3 side. In addition, an introduction hole 41 having a diameter of 1.5 mm for introducing a coating agent described later is provided on the other surface intersecting with the surface. However, the surface on which the introduction hole 41 is provided is not limited to that surface, and may be any surface that faces the protection circuit. The partition 5 is provided with communication holes 51 and 52 which communicate with the battery storage space and the protection circuit storage space, and the positive electrode terminal 21 and the negative electrode terminal 22 are provided in these communication holes 51 and 52.
Is passed through to connect the battery main body 2 and the protection circuit 3.
【００１４】保護回路付き非水電解液電池１は、その全
面が絶縁性及び耐薬品性に優れた皮膜（図示省略）で被
覆されている。この皮膜は、日本パリレン株式会社製パ
リレンＤからなり、厚さ５μｍ程度である。The entire surface of the non-aqueous electrolyte battery 1 with a protection circuit is covered with a film (not shown) having excellent insulation and chemical resistance. This film is made of Parylene D manufactured by Nippon Parylene Co., Ltd. and has a thickness of about 5 μm.
【００１５】電池１の保護回路収納空間に導入孔４１よ
り上記非水電解液を充填した状態で、定電流電源を用い
て１ＣｍＡで３ｈｒ連続充電し、さらに１ＣｍＡで連続
放電を試みたところ、正規の充電終止電圧４．１Ｖで充
電工程が終了し、また、正規の放電終止電圧２．７５Ｖ
で放電が終了したので、保護回路３が非水電解液に浸食
されず、正常に作動していることがわかった。When the protection circuit housing space of the battery 1 was filled with the non-aqueous electrolyte through the introduction hole 41, the battery was continuously charged at 1 CmA for 3 hours using a constant current power source, and further tried to be continuously discharged at 1 CmA. The charging process is completed at the end-of-charge voltage of 4.1V, and the normal end-of-discharge voltage is 2.75V.
It was found that since the discharge was completed at, the protection circuit 3 was not corroded by the non-aqueous electrolyte and was operating normally.
【００１６】一方、パリレンＤをコーティングしない以
外は、電池１と同形同質の比較用の電池を製造し、同様
の条件で充電したところ、保護回路の機能が発揮されず
に電池が過充電状態となり、電池が発熱変形して安全弁
が作動した。そして、発火には至らなかったものの以後
の電池使用は不可能となった。On the other hand, a comparative battery having the same shape and quality as Battery 1 was manufactured except that Parylene D was not coated, and the battery was charged under the same conditions. However, the function of the protection circuit was not exhibited and the battery was overcharged. , The battery was deformed by heat and the safety valve was activated. Although it did not ignite, it became impossible to use the battery thereafter.
【００１７】[0017]
【発明の効果】以上のように、この発明の保護回路付き
非水電解液電池によれば、電解液が漏れても安全であ
る。従って、安心して電子機器に装填して携帯すること
ができる。As described above, according to the non-aqueous electrolyte battery with the protection circuit of the present invention, it is safe even if the electrolyte leaks. Therefore, the electronic device can be safely loaded and carried.
【図１】実施例の保護回路付き非水電解液電池を示す断
面図である。FIG. 1 is a cross-sectional view showing a non-aqueous electrolyte battery with a protection circuit of an example.
１ 保護回路付き非水電解液電池 ２ 電池本体 ２１ 正極端子 ２２ 負極端子 ３ 保護回路 ４ 容器 ４１ 導入孔 ５ 間仕切り ５１，５２ 連通孔 ６ 外部端子 1 non-aqueous electrolyte battery with protection circuit 2 battery body 21 positive electrode terminal 22 negative electrode terminal 3 protection circuit 4 container 41 introduction hole 5 partition 51, 52 communication hole 6 external terminal
Claims (1)
止するために、その電池と接続され、その表面が絶縁性
及び耐薬品性に優れた皮膜で被覆されていることを特徴
とする非水電解液電池の保護回路。1. A non-aqueous electrolyte battery, which is connected to the battery and has a surface coated with a film excellent in insulation and chemical resistance in order to prevent overcharge or overdischarge. Non-aqueous electrolyte battery protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7152466A JPH08321297A (en) | 1995-05-26 | 1995-05-26 | Protection circuit for non-aqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7152466A JPH08321297A (en) | 1995-05-26 | 1995-05-26 | Protection circuit for non-aqueous electrolyte battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08321297A true JPH08321297A (en) | 1996-12-03 |
Family
ID=15541133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7152466A Pending JPH08321297A (en) | 1995-05-26 | 1995-05-26 | Protection circuit for non-aqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08321297A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000173576A (en) * | 1998-12-04 | 2000-06-23 | Japan Storage Battery Co Ltd | Battery |
| JP2002134075A (en) * | 2000-08-15 | 2002-05-10 | Sony Corp | Electrolyte contact preventive mechanism and battery unit, and resin film-forming method and resin film- forming unit |
| KR100695950B1 (en) * | 2005-06-22 | 2007-03-15 | 넥스콘 테크놀러지 주식회사 | Inner Pack Structure for Portable Equipment |
| JP2015130347A (en) * | 2012-03-15 | 2015-07-16 | 株式会社東芝 | lithium ion secondary battery |
-
1995
- 1995-05-26 JP JP7152466A patent/JPH08321297A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000173576A (en) * | 1998-12-04 | 2000-06-23 | Japan Storage Battery Co Ltd | Battery |
| JP4701464B2 (en) * | 1998-12-04 | 2011-06-15 | 株式会社Ｇｓユアサ | battery |
| JP2002134075A (en) * | 2000-08-15 | 2002-05-10 | Sony Corp | Electrolyte contact preventive mechanism and battery unit, and resin film-forming method and resin film- forming unit |
| KR100695950B1 (en) * | 2005-06-22 | 2007-03-15 | 넥스콘 테크놀러지 주식회사 | Inner Pack Structure for Portable Equipment |
| JP2015130347A (en) * | 2012-03-15 | 2015-07-16 | 株式会社東芝 | lithium ion secondary battery |
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