JPH0589866A - Battery with safety mechanism - Google Patents
Battery with safety mechanismInfo
- Publication number
- JPH0589866A JPH0589866A JP3035810A JP3581091A JPH0589866A JP H0589866 A JPH0589866 A JP H0589866A JP 3035810 A JP3035810 A JP 3035810A JP 3581091 A JP3581091 A JP 3581091A JP H0589866 A JPH0589866 A JP H0589866A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- hole
- safety mechanism
- pressure
- case
- 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
-
- 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
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は安全機構付電池に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery with a safety mechanism.
【0002】[0002]
【従来の技術】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電池は、高エネルギー密度、
高電圧、長期保存性等に優れ、メモリーバックアップ用
電源や通信機用電源など広く利用されている。しかしそ
の反面長期使用に耐え得るように、その封口は極めて密
閉性、気密性が高く、このために電池の内部短絡及び外
部短絡や外部より強制的に温度を上昇された場合等に
は、電池内圧が上昇して電池が破裂に致ることがあっ
た。2. Description of the Related Art A non-aqueous electrolyte battery using lithium as a negative electrode active material and a non-aqueous electrolyte as an electrolyte has a high energy density,
It has excellent high voltage and long-term storability, and is widely used as a power source for memory backup and power source for communication equipment. However, on the other hand, the sealing is extremely tight and airtight so that it can withstand long-term use.Therefore, when the internal short circuit and external short circuit of the battery or the temperature is forced to rise from the outside, The internal pressure increased and the battery sometimes burst.
【0003】このため従来は次のような防爆構造が提案
されている。 (1)電池ケースの一部に肉薄部を設け、内圧が上昇し
ても電池が破裂に致る前に肉薄部が破れ、電池内圧を放
出する。Therefore, conventionally, the following explosion-proof structure has been proposed. (1) A thin portion is provided in a part of the battery case, and even if the internal pressure rises, the thin portion is broken before the battery ruptures, and the battery internal pressure is released.
【0004】(2)電池の組立封口板の中に封口部材と
して肉薄な金属薄板、合成樹脂あるいは合成ゴム薄板、
あるいは両者を貼り合わせた複合膜を配置し、内圧上昇
時に膨張した薄板を鋭利な突起で破壊して電池内圧を放
出する。(2) Assembling the battery In the sealing plate, a thin metal plate, a synthetic resin or a synthetic rubber thin plate as a sealing member,
Alternatively, a composite membrane in which the both are bonded is arranged, and the thin plate that has expanded when the internal pressure rises is broken by a sharp projection to release the internal pressure of the battery.
【0005】(3)電池ケース及び封口板にガス抜き穴
をを設け、この穴を金属への接着性を有するプラスチッ
クフィルムと金属薄膜の複合被膜でおおい、穴の周囲を
熱融着することにより、内圧上昇時には、熱融着部分が
はずれ、内圧を放出する。(3) A gas vent hole is provided in the battery case and the sealing plate, the hole is covered with a composite coating of a plastic film having adhesiveness to metal and a metal thin film, and the periphery of the hole is heat-sealed. When the internal pressure rises, the heat-sealed portion comes off and the internal pressure is released.
【0006】[0006]
【発明が解決しようとする課題】しかし、上記(1)の
場合、このような構造では鉄製電池容器に肉薄部を形成
させる場合、加工上の精度から肉薄部の肉厚は0.08〜0.
15mm程度までしか薄く加工出来ないのが実状であり、こ
の場合電池の内圧が50〜70kg/cm2の高圧に達しないと防
爆機能が動作しないという欠点があった。However, in the case of the above (1), in the case of forming a thin portion in the iron battery container with such a structure, the thickness of the thin portion is 0.08 to 0 due to processing accuracy.
The reality is that it can only be processed to a thin thickness of about 15 mm. In this case, the explosion-proof function does not work unless the internal pressure of the battery reaches a high pressure of 50 to 70 kg / cm 2 .
【0007】また、上記(2)の場合には、合成ゴム、
合成樹脂等の薄板を使用する場合、それら薄板が大気中
の水分を極めて容易に透過し易く、非水電解液電池には
不適当である。また金属薄板を使用する場合、低圧動作
性を考慮するとその厚みが数μmのオーダーにする必要
があり、このような薄板を組立封口板内にカシメ方式で
挿入固定することは気密封口性の点におい問題が発生す
る。In the case of the above (2), synthetic rubber,
When thin plates of synthetic resin or the like are used, these thin plates easily penetrate moisture in the atmosphere and are not suitable for non-aqueous electrolyte batteries. When using a thin metal plate, the thickness must be on the order of several μm in consideration of low-pressure operability. It is important to insert and fix such a thin plate in the assembly sealing plate by the caulking method. Smell problem occurs.
【0008】そして、上記(3)の場合にはプラスチッ
クの熱融着のみで内圧放出弁作動圧を調節しているので
あって、安全弁作動圧が低い圧力でしか調節できず、し
かも周囲温度等の影響を受け易く、また外部からの接触
等で安全弁がはずれ易い等の理由により誤動作が発生し
易いという問題点がある。In the case of the above (3), since the internal pressure release valve operating pressure is adjusted only by heat-sealing the plastic, the safety valve operating pressure can be adjusted only at a low pressure, and the ambient temperature etc. There is a problem that a malfunction is likely to occur due to the reason that the safety valve is likely to be disengaged due to an external contact or the like.
【0009】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、製作が容易で、かつベント圧の
調節が容易であり、低圧にて安定に作動する安全機構付
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 provides a battery with a safety mechanism which is easy to manufacture, the vent pressure can be easily adjusted, and operates stably at a low pressure. The purpose is to
【0010】[0010]
【課題を解決するための手段】この発明の安全機構付電
池は、電池ケースまたは封口板に、その周縁部が外側方
向へ突起し、電池内部のガスを排出する孔を形成し、こ
の孔の外側に上記突起を被い、上記孔を閉塞するように
熱接着性ポリオレフィン系樹脂をアウトサートし、上記
ケースまたは封口板を密閉したものである。In the battery with a safety mechanism of the present invention, a peripheral edge of the battery case or the sealing plate is projected outward to form a hole for discharging gas inside the battery. The projection is covered on the outside, a thermoadhesive polyolefin-based resin is outsert so as to close the hole, and the case or the sealing plate is sealed.
【0011】[0011]
【作用】この発明における安全機構付電池は、電池内圧
が上昇した場合には、低圧において安定して内圧排出機
構が作動し、また非水電解液電池の長所たる長期保存特
性を損うことなく気密封口性を維持でき、耐漏液性にも
優れ、電池特性の安定した電池を提供することが出来
る。さらに突起した孔の周囲の角度及び寸法を調節する
ことにより安全機構作動圧を調整することができる。The battery with a safety mechanism according to the present invention, when the internal pressure of the battery rises, the internal pressure discharging mechanism operates stably at a low pressure, and the advantageous long-term storage characteristics of the non-aqueous electrolyte battery are not impaired. It is possible to provide a battery having stable airtightness, excellent liquid leakage resistance, and stable battery characteristics. Further, the safety mechanism operating pressure can be adjusted by adjusting the angle and size around the projected hole.
【0012】[0012]
実施例1.図1はこの発明の一実施例の安全機構付電池
の要部断面図、図2はその安全機構部分の拡大断面図で
ある。図に示す如く、電池ケース(1)に周縁部が電池
の外側方向に突起した、内部の圧力を排出する孔(3)
を形設し、この孔(3)の外側に熱接着性ポリオレフィ
ン系樹脂(4)をアウトサートして、電池ケース(1)
を密閉し、その樹脂の上から金属ケース(5)をかぶせ
てガスの透過を防止する。また、孔(3)の周縁部の突
起の角度(θ)や寸法(h)を調節して、安全機構の作
動圧力を調節する。ここで説明する非水電解液の使用温
度範囲は通常−20℃〜60℃である。ところが上記熱接着
性ポリオレフィン樹脂の軟化点が低いと通常使用状態で
も安全機構が作動してしまうことがある。また、軟化点
が高いと電池温度上昇に伴う内圧上昇があっても、安全
機構が作動せず、電池が破裂してしまうおそれがある。
従って、軟化点90〜150 ℃の熱接着性ポリオレフィン系
樹脂を選択することが好ましい。このように、内部短絡
及び外部短絡や、外部より強制的に温度を上昇された場
合等による電池内圧上昇の場合、その圧力により内圧排
出孔(3)の周囲にアウトサートされた熱接着性ポリオ
レフィン系樹脂(4)がはずれ、内部ガスが電池ケース
(1)の外に排出される。Example 1. FIG. 1 is a sectional view of a main part of a battery with a safety mechanism according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the safety mechanism portion. As shown in the figure, the battery case (1) has a hole (3) for discharging internal pressure, the peripheral portion of which protrudes toward the outside of the battery.
The heat-adhesive polyolefin resin (4) is outsert outside the hole (3) to form the battery case (1).
Is sealed, and a metal case (5) is covered over the resin to prevent gas permeation. Also, the working pressure of the safety mechanism is adjusted by adjusting the angle (θ) and the dimension (h) of the protrusions at the peripheral portion of the hole (3). The operating temperature range of the non-aqueous electrolyte described here is usually -20 ° C to 60 ° C. However, if the softening point of the heat-adhesive polyolefin resin is low, the safety mechanism may operate even under normal use. Further, if the softening point is high, even if the internal pressure rises as the battery temperature rises, the safety mechanism may not operate and the battery may burst.
Therefore, it is preferable to select a heat-adhesive polyolefin resin having a softening point of 90 to 150 ° C. In this way, in the case of internal short circuit and external short circuit, or when the internal pressure of the battery rises due to the temperature being forcibly raised from the outside, etc., the heat-adhesive polyolefin outserted around the internal pressure discharge hole (3) by the pressure. The system resin (4) comes off, and the internal gas is discharged to the outside of the battery case (1).
【0013】[0013]
【発明の効果】以上のように、この発明によれば、電池
ケースまたは封口板に、その周縁部が外側方向へ突起
し、電池内部のガスを排出する孔を形成し、この孔の外
側に上記突起を被い、上記孔を閉塞するように熱接着性
ポリオレフィン系樹脂をアウトサートし、上記ケースま
たは封口板を密閉するようにしたので、低圧で安定に作
動する電池の安全機構を容易に安価にて形成でき、しか
も密閉性、気密性において長期信頼性の高い安全機構付
電池を提供できる。As described above, according to the present invention, the battery case or the sealing plate is formed with a hole for discharging the gas inside the battery, with its peripheral edge protruding outward, and the hole is formed outside the hole. Since the heat-adhesive polyolefin resin is outsert so as to cover the protrusions and close the holes, and the case or the sealing plate is sealed, the battery safety mechanism that operates stably at a low pressure can be easily performed. It is possible to provide a battery with a safety mechanism that can be formed at low cost and that has long-term reliability in terms of hermeticity and airtightness.
【図1】この発明の実施例1の要部を示す断面図であ
る。FIG. 1 is a sectional view showing a main part of a first embodiment of the present invention.
【図2】図1の安全機構部分を拡大して示す断面図であ
る。FIG. 2 is an enlarged sectional view showing a safety mechanism portion of FIG.
1 電池ケース 3 孔 4 熱接着性ポリオレフィン系樹脂 1 Battery Case 3 Holes 4 Thermal Adhesive Polyolefin Resin
───────────────────────────────────────────────────── 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 (72)発明者 望月 康正 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 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoshi Sudo, 333 Minorita, Matsudo City, Chiba Prefecture Toyo Takasago Dry Electric Battery Co., Ltd. Company Development Department (72) Inventor Yasumasa Mochizuki 333 Minoridai, Matsudo City, Chiba Toyo Takasago Dry Battery Co., Ltd.
Claims (1)
が外側方向へ突起し、電池内部のガスを排出する孔を形
成し、この孔の外側に上記突起を被い、上記孔を閉塞す
るように熱接着性ポリオレフィン系樹脂をアウトサート
し、上記ケースまたは封口板を密閉した安全機構付電
池。1. A battery case or a sealing plate, a peripheral edge of which projects outwardly to form a hole for discharging gas inside the battery, and the projection is covered outside the hole to close the hole. A battery with a safety mechanism in which the heat-adhesive polyolefin resin is outserted and the case or sealing plate is sealed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3035810A JP3062512B2 (en) | 1991-03-01 | 1991-03-01 | Battery with safety mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3035810A JP3062512B2 (en) | 1991-03-01 | 1991-03-01 | Battery with safety mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0589866A true JPH0589866A (en) | 1993-04-09 |
JP3062512B2 JP3062512B2 (en) | 2000-07-10 |
Family
ID=12452288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3035810A Expired - Fee Related JP3062512B2 (en) | 1991-03-01 | 1991-03-01 | Battery with safety mechanism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3062512B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006012814A (en) * | 2004-06-22 | 2006-01-12 | Samsung Sdi Co Ltd | Lithium-ion secondary battery |
-
1991
- 1991-03-01 JP JP3035810A patent/JP3062512B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006012814A (en) * | 2004-06-22 | 2006-01-12 | Samsung Sdi Co Ltd | Lithium-ion secondary battery |
JP4562035B2 (en) * | 2004-06-22 | 2010-10-13 | 三星エスディアイ株式会社 | Lithium ion secondary battery |
Also Published As
Publication number | Publication date |
---|---|
JP3062512B2 (en) | 2000-07-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |