JPH09199106A - Explosion-proof sealing plate for secondary cell - Google Patents
Explosion-proof sealing plate for secondary cellInfo
- Publication number
- JPH09199106A JPH09199106A JP8007066A JP706696A JPH09199106A JP H09199106 A JPH09199106 A JP H09199106A JP 8007066 A JP8007066 A JP 8007066A JP 706696 A JP706696 A JP 706696A JP H09199106 A JPH09199106 A JP H09199106A
- Authority
- JP
- Japan
- Prior art keywords
- explosion
- proof
- sealing plate
- plate
- battery
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、防爆型の密閉２次
電池に関し、とくに電池の内圧が上昇すると電池内部で
電流を遮断する機構を備えた防爆封口板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof sealed secondary battery, and more particularly to an explosion-proof sealing plate having a mechanism for interrupting current inside the battery when the internal pressure of the battery rises.
【０００２】[0002]
【従来の技術】近年、ビデオカメラや、パソコンなどの
電子機器の高性能化、小型化は目覚ましく、コードレス
化・ポータブル化にともない、その駆動用電源となる２
次電池の重負荷特性の改善や、小型、軽量で高エネルギ
ー密度への要求が強まっている。特に、近年注目を集め
ているリチウム２次電池は、高エネルギー密度を有する
電池であり、次世代電池としても有望である。2. Description of the Related Art In recent years, electronic devices such as video cameras and personal computers have been remarkably improved in performance and miniaturization, and have become power supplies for driving the cordless and portable devices.
There is an increasing demand for improvements in the heavy load characteristics of secondary batteries, small size and light weight, and high energy density. In particular, lithium secondary batteries, which have been attracting attention in recent years, have high energy density and are promising as next-generation batteries.
【０００３】ところが、密閉型２次電池、特にリチウム
金属やカーボン材料を負極として使用するリチウム２次
電池は外部短絡・過充電・逆充電等の使用状態では、電
解液や活物質の分解等により電池内でガスが多量に発生
し、電池内圧が急激に上昇する。特に、電池の過充電状
態が長時間継続すると、電池内圧は高まり電池温度も急
激に上昇する恐れがある。あるいは、放電時に誤使用等
により短絡状態となり大電流が流れた場合も過充電状態
と同様に、電解液の分解が起こり多量のガスが発生する
恐れがあった。However, a sealed secondary battery, particularly a lithium secondary battery using a lithium metal or a carbon material as a negative electrode, is decomposed by an electrolytic solution or an active material when used under external short-circuiting, overcharging or reverse charging. A large amount of gas is generated in the battery, and the internal pressure of the battery rises rapidly. In particular, if the battery is overcharged for a long time, the internal pressure of the battery may increase and the battery temperature may rise rapidly. Alternatively, when a large current flows due to a short circuit due to misuse or the like during discharging, the electrolytic solution may be decomposed and a large amount of gas may be generated, as in the overcharged state.
【０００４】そこで、このような短絡、過充電、逆充電
時の電池の爆発を未然に防止する方法が、特開平６−１
９６１５０号公報に記載されている。この公報に記載さ
れた密閉型２次電池は、図４に示す構造からなってお
り、電池内の内圧が上昇した場合に電流を遮断する機
構、および、さらに内圧が上昇した場合には、隔壁の強
度の小さい部分を破裂させガス体を電池内部から流出さ
せることを開示している。先行技術は、隔壁と溶接板を
レーザー溶接等により、融点以上の温度で融かし、強固
に溶接し、溶接板を破断させて電気的導通を遮断させる
構成をなしており、電流遮断圧は、溶接強度そのものよ
りも溶接板が破断する強度に大きく依存している。Therefore, there is a method of preventing the battery from exploding at the time of such a short circuit, overcharge, or reverse charge, as disclosed in Japanese Patent Laid-Open No. 6-1.
It is described in Japanese Patent Publication No. 96150. The sealed secondary battery described in this publication has a structure shown in FIG. 4, a mechanism for interrupting current when the internal pressure in the battery rises, and a partition wall when the internal pressure further rises. It is disclosed that the low strength portion of the battery is ruptured to allow the gas body to flow out from the inside of the battery. In the prior art, the partition wall and the welding plate are melted at a temperature equal to or higher than the melting point by laser welding or the like, and are firmly welded, and the welding plate is ruptured to interrupt the electrical conduction. However, it depends more on the strength at which the welded plate breaks than on the welding strength itself.
【０００５】この様な構成においては、隔壁の板厚が溶
接板溶接部分の板厚よりも厚く設定することが必要で、
溶接板溶接部の機械的強度に破断強度は支配される。図
面上からも板厚の関係は明らかである。また、隔壁と溶
接板との溶接強度そのものを安定化させる方法を開示し
ておらず、隔壁に下部に向けて設けた凸部形状の反転力
と、隔壁板厚によってコントロールしようとしたもので
ある。In such a structure, it is necessary to set the plate thickness of the partition wall to be thicker than the plate thickness of the welded plate welded portion,
The breaking strength is governed by the mechanical strength of the welded part of the welded plate. The relationship of plate thickness is clear from the drawings. Further, it does not disclose a method of stabilizing the welding strength itself between the partition wall and the welded plate, and attempts to control by the inversion force of the convex shape provided on the partition wall toward the bottom and the partition wall plate thickness. .
【０００６】[0006]
【発明が解決しようとする課題】以上の構造を有する従
来防爆型の密閉型２次電池は、溶接部の溶接強度そのも
のを安定化させるものではなく、電流遮断圧を安定させ
ることが難しいとの欠点を有していた。また、溶接強度
が不安定なため電池の実使用においてもわずかなショッ
クで溶接部がハズレ、電池が使用不可になる等の課題も
有していた。よって、本発明は電流遮断圧を安定化させ
ることを主課題とし、溶接強度を安定化させ、掛かる課
題を解決しようとするものである。The conventional explosion-proof sealed secondary battery having the above structure does not stabilize the welding strength itself of the welded portion, and it is difficult to stabilize the current breaking pressure. It had drawbacks. In addition, since the welding strength is unstable, even when the battery is actually used, there is a problem that the welding part is distorted due to a slight shock and the battery becomes unusable. Therefore, the present invention aims to stabilize the current breaking pressure, to stabilize the welding strength, and to solve the problems.
【０００７】[0007]
【課題を解決するための手段】本発明の２次電池用封口
板は、前述の目的を達成するために下記の構成を備え
る。MEANS FOR SOLVING THE PROBLEMS A sealing plate for a secondary battery of the present invention has the following constitution in order to achieve the above-mentioned object.
【０００８】外装缶の上端開口部に絶縁ガスケットによ
りシールカシメされた防爆機能および端子を兼ねる防爆
封口板において、前記防爆封口板は、少なくとも端子キ
ャップ、ＰＴＣ素子、防爆弁体、および絶縁インナーガ
スケットを金属ケースに収納させて一体カシメされた防
爆封口板であって、前記防爆弁体には、易破断性薄肉部
が形成されており、この防爆弁体と通気孔と突起部を有
し突起部先端がフラットに形成されてなる金属板が、前
記絶縁インナーガスケットを介して、前記突起部フラッ
ト面で溶接された２次電池用防爆封口板。In an explosion-proof sealing plate having an explosion-proof function and a terminal, which is sealed by an insulating gasket at the upper end opening of the outer can, the explosion-proof sealing plate includes at least a terminal cap, a PTC element, an explosion-proof valve body, and an insulating inner gasket. An explosion-proof sealing plate housed in a metal case and integrally caulked, wherein the explosion-proof valve body is formed with an easily breakable thin-walled portion, and the explosion-proof valve body, a vent hole and a projection portion are provided. An explosion-proof sealing plate for a secondary battery, wherein a metal plate having a flat tip is welded to the flat surface of the protrusion through the insulating inner gasket.
【０００９】さらには、防爆封口板全体の機械的強度も
向上させ、電池の落下時等によるショックにも溶接部が
簡単にハズレないように、通気孔と突起部を有し突起部
先端がフラットに形成されてなる金属板が内端子板とし
て別個に前記防爆封口板に設置させた防爆封口板とす
る。Further, the mechanical strength of the entire explosion-proof sealing plate is improved, and a vent hole and a protruding portion are provided so that the welded portion is not easily distorted even when a shock is caused when the battery is dropped, etc. The metal plate formed in 1) is separately installed as the inner terminal plate on the explosion-proof sealing plate to form the explosion-proof sealing plate.
【００１０】[0010]
【発明の実施の形態】内端子板を設けた本発明防爆封口
板一実施例により、以下、図１に従い作用を説明する。BEST MODE FOR CARRYING OUT THE INVENTION The operation of an explosion-proof sealing plate according to an embodiment of the present invention provided with an inner terminal plate will be described below with reference to FIG.
【００１１】本発明の防爆封口板を用いることにより、
電池が過充電、逆充電、外部短絡等の異常使用状態とな
り、電池内圧が急激に上昇すると、防爆弁体３には上方
（端子キャップ１側）に変形する応力が働き、通気孔６
ａを有する内端子板６と防爆弁体３の溶接部５に、引っ
張りの力が生ずる。この引っ張り力が溶接強度を上回る
と溶接部５で防爆弁体３が剥離し上方に湾曲し電池内部
との電気的導通を遮断する。By using the explosion-proof sealing plate of the present invention,
When the battery is in an abnormal use state such as overcharge, reverse charge, or external short circuit, and the battery internal pressure rises rapidly, the explosion-proof valve body 3 receives a stress that deforms upward (to the terminal cap 1 side), and the vent hole 6
A tensile force is generated in the welded portion 5 of the inner terminal plate 6 having a and the explosion-proof valve body 3. When this tensile force exceeds the welding strength, the explosion-proof valve body 3 peels off at the welded portion 5 and bends upward, interrupting electrical conduction with the inside of the battery.
【００１２】これにより、ガス発生はストップされ、電
池の内圧上昇も抑制される。この時の引っ張りの力は電
池内圧にそのまま依存する。ここで、内端子板６と防爆
弁体３は、超音波溶接により内端子板６に設けた突起部
６ｂ上のフラット面で溶接されるが、溶接強度は、特
に、前記フラット部の面積、および突起部高さに影響を
受けるものである。よって、これを限定することによ
り、超音波溶接時の投入エネルギーの可変によって溶接
強度をコントロールすることができる。しかも、溶接強
度バラツキも小さく安定化できる。その結果、封口板電
流遮断圧バラツキは小さくなり安定する。As a result, gas generation is stopped and the rise in internal pressure of the battery is suppressed. The pulling force at this time depends directly on the battery internal pressure. Here, the inner terminal plate 6 and the explosion-proof valve body 3 are welded on the flat surface on the projection 6b provided on the inner terminal plate 6 by ultrasonic welding, but the welding strength is, in particular, the area of the flat portion, And the height of the protrusion. Therefore, by limiting this, the welding strength can be controlled by varying the input energy during ultrasonic welding. Moreover, variations in welding strength are small and can be stabilized. As a result, the variation of the sealing plate current cutoff pressure becomes small and stable.
【００１３】次に、防爆弁体３と端子キャップ１間に設
置されるＰＴＣ素子２は、電池が異常使用充電時・逆充
電時・外部短絡時等により大電流が投入された場合や、
高電圧が印加された場合に、ＰＴＣ素子抵抗は急激に上
昇し、電流を遮断する機能を有する。よって２重の安全
機構が付加された防爆封口板である。Next, the PTC element 2 installed between the explosion-proof valve body 3 and the terminal cap 1 is used when a large current is applied to the battery due to abnormal use charging, reverse charging, external short circuit, or the like.
When a high voltage is applied, the resistance of the PTC element rises sharply and has a function of interrupting the current. Therefore, it is an explosion-proof sealing plate with a double safety mechanism added.
【００１４】[0014]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。ただし、以下に示す実施例は、本発明の一例を例
示するものであり、材質・構造等を特定するものではな
い。Embodiments of the present invention will be described below with reference to the drawings. However, the following examples are merely examples of the present invention, and do not specify the material, structure, or the like.
【００１５】（実施例１）図２は本発明封口板を用いた
防爆型電池の側面断面図である。(Example 1) FIG. 2 is a side sectional view of an explosion-proof battery using the sealing plate of the present invention.
【００１６】外装缶８内部には、アルミニウム箔集電体
にＬｉＣｏＯ2を主成分とするペーストを塗布、乾燥し
短冊状に切断して作成した正極板と、銅箔集電体に正極
板のＬｉＣｏＯ2の代わりに球状炭素を主成分として同
様に作成した負極板を、フィルム状セパレーターを介し
て巻回し、非水電解液を注入し、発電要素群として外装
缶に内蔵させ、外装缶８開口部に、本発明防爆封口板を
絶縁ガスケット９を介して、外装缶８の上方開口部に設
けた環状段部上に圧入し、外装缶８の開口部を金型で内
方に折り曲げて密封口した。Inside the outer can 8, a positive electrode plate prepared by applying a paste containing LiCoO 2 as a main component to an aluminum foil current collector, drying it and cutting it into strips, and a copper foil current collector with the positive electrode plate A negative electrode plate made in the same manner with spherical carbon as a main component instead of LiCoO 2 was wound around a film separator, a nonaqueous electrolyte was injected, and the nonaqueous electrolyte was incorporated into the outer can as a power generating element group, and the outer can 8 openings In this case, the explosion-proof sealing plate of the present invention is press-fitted onto the annular stepped portion provided in the upper opening of the outer can 8 through the insulating gasket 9, and the opening of the outer can 8 is bent inward by a mold to seal. Uttered
【００１７】防爆封口板は、端子キャップ１、ＰＴＣ素
子２、防爆弁体３、および絶縁インナーガスケット４を
金属ケース７に収納させて一体カシメされた封口板であ
って、前記防爆弁体３には、易破断性薄肉部３ａがＣ型
形状にプレス刻印により形成されており、この防爆弁体
３と、通気孔７ａと突起部７ｂを有し突起部７ｂ先端が
フラットに形成されてなる金属板（金属ケース７）が、
前記絶縁インナーガスケット４を介して、前記突起部７
ｂフラット面で溶接されている。The explosion-proof sealing plate is a sealing plate in which the terminal cap 1, the PTC element 2, the explosion-proof valve body 3, and the insulating inner gasket 4 are housed in a metal case 7 and integrally caulked. Is an easily rupturable thin portion 3a formed by stamping into a C-shape, and a metal having the explosion-proof valve body 3, a vent hole 7a and a protruding portion 7b, and a flat end of the protruding portion 7b. The plate (metal case 7)
Through the insulating inner gasket 4, the protrusion 7
b Welded on flat surface.
【００１８】さらに本発明防爆封口板を製造工程順に構
成を詳しく説明すると、通気孔７ａ（¢１．０×４）と
突起部７ｂを有し、突起部７ｂ（突起部高さ；０．１ｍ
ｍ）先端がフラット（フラット面；¢１．０ｍｍ）に形
成され、さらには周縁に立ち上がり部を有する金属板
（金属ケース７）に、ポリプロピレン等の樹脂を略Ｌ字
形で環状に成形した絶縁性を有する絶縁インナーガスケ
ット４および、防爆機能のために、金型プレスでＣ型形
状刻印により設けた薄肉部を有する防爆弁体３を挿入
し、前記金属板（金属ケース７）突起部７ｂフラット面
と前記防爆弁体３を超音波溶接によって溶着し両者を電
気的に接続した。The structure of the explosion-proof sealing plate according to the present invention will be described in detail in the order of manufacturing steps. The explosion-proof sealing plate has a ventilation hole 7a (¢ 1.0 × 4) and a protrusion 7b, and a protrusion 7b (height of protrusion: 0.1 m).
m) A resin plate such as polypropylene is formed into an annular shape in a substantially L shape on a metal plate (metal case 7) having a flat tip (flat surface; Insulating inner gasket 4 having the above and an explosion-proof valve body 3 having a thin portion provided by C-shaped stamping with a die press for the explosion-proof function are inserted, and the metal plate (metal case 7) protrusion 7b flat surface is inserted. And the explosion-proof valve body 3 were welded by ultrasonic welding to electrically connect them.
【００１９】次に、充電時や、電池外部短絡時等に大電
流が流れた場合これをカットし、電池の安全性を確保す
るためのＰＴＣ素子と、電池の外部端子となるキャップ
状端子キャップ１を積重載置し金属ケース７周縁部をカ
シメ金型により内方に折り曲げてカシメ密封口した。Next, when a large current flows during charging or when the battery is short-circuited to the outside, the current is cut off to ensure the safety of the battery, and a cap-shaped terminal cap that serves as an external terminal of the battery. 1 was placed on top of each other and the periphery of the metal case 7 was bent inward by a caulking die to form a caulking sealing opening.
【００２０】防爆弁体３は、外径；¢１４ｍｍ、厚み；
０．３ｍｍのアルミニウム金属を使用し、Ｃ型形状刻印
を打つことで薄肉部を形成し、この時の薄肉部は、弁体
破断圧がほぼ２０ｋｇｆ／ｃｍ2になるように設定し
た。また、防爆弁体３と金属板（金属板７）の溶着は、
溶着条件が設定しやすく、使い勝手の良い超音波溶接機
を用いた。超音波振動子に接続されたホーンの先端荷重
を最適に調整し、超音波振動（４０ｋＨｚ）を印加して
溶接した。The explosion-proof valve body 3 has an outer diameter of 14 mm and a thickness of 14 mm.
A thin-walled portion was formed by stamping a C-shaped stamp using 0.3 mm of aluminum metal, and the thin-walled portion at this time was set so that the valve breaking pressure was about 20 kgf / cm 2 . Further, the welding of the explosion-proof valve body 3 and the metal plate (metal plate 7) is
The ultrasonic welding machine was used because the welding conditions are easy to set and easy to use. The tip load of the horn connected to the ultrasonic oscillator was optimally adjusted, and ultrasonic vibration (40 kHz) was applied to perform welding.
【００２１】また、金属板（金属ケース７）も防爆弁体
３と同様に材質は、非水電解液に対する耐触性の良いア
ルミニウムを使用し、フラット面を有する突起部７ｂお
よび、周縁立ち上がり部の加工は、板材からのプレス加
工で制作した。As with the explosion-proof valve body 3, the metal plate (metal case 7) is made of aluminum, which has good resistance to non-aqueous electrolyte, and has a flat surface and a protrusion 7b and a peripheral edge rising portion. The processing was done by pressing from a plate material.
【００２２】（比較例）実施例１では、金属板（金属ケ
ース７）にフラット面を有する突起部７ｂを設けたが、
この突起部７ｂの無い金属板（金属ケース７）を製作し
た。(Comparative Example) In Example 1, the metal plate (metal case 7) was provided with the protrusion 7b having a flat surface.
A metal plate (metal case 7) having no protrusion 7b was manufactured.
【００２３】本発明者らは、このような防爆封口板を用
いた電池の内圧上昇時における電気的接続部の遮断圧を
測定した。The inventors of the present invention measured the breaking pressure of the electrical connection when the internal pressure of a battery using such an explosion-proof sealing plate increased.
【００２４】その結果を図３に示した。図３の実施例お
よび、比較例の電流遮断圧測定値のバラツキ（標準偏
差）比較より明らかなように、本発明防爆封口板電流遮
断圧バラツキは小さく安定していた。The results are shown in FIG. As is clear from the comparison (standard deviation) in the measured values of the current breaking pressures of the example of FIG. 3 and the comparative example, the variation of the current breaking pressure of the explosion-proof sealing plate of the present invention was small and stable.
【００２５】（実施例２）本発明の作用を説明した図２
防爆封口板（内端子板６を設けた防爆封口板）を、実施
例１と同様な方法で電池を組み立て、実施例１の電池と
共に電池の落下試験を行った。(Embodiment 2) FIG. 2 explaining the operation of the present invention.
A battery was assembled from the explosion-proof sealing plate (explosion-proof sealing plate provided with the inner terminal plate 6) in the same manner as in Example 1, and a battery drop test was performed together with the battery of Example 1.
【００２６】−落下試験方法− １ｍの高さからコンクリート上に電池のキャップ端子
側、底側、横側の３方向から電池を各５回・各１０回づ
つ落下させ、落下前と落下後での溶接部ハズレ電池の発
生率を比較した。その結果は（表１）に示した。-Drop Test Method- Drop the battery on concrete from a height of 1 m from the cap terminal side, bottom side, and lateral side of the battery 5 times each, 10 times each, and before and after dropping. The occurrence rate of the defective battery at the welded portion was compared. The results are shown in (Table 1).
【００２７】（表１）の実施例１および、実施例２の電
池の落下試験での溶接部ハズレ率比較より明らかなよう
に、通気孔と突起部を有し突起部先端がフラットに形成
されてなる金属板が内端子板として、防爆封口板内に設
置されたことより、防爆封口板の全体的強度がアップ
し、電池への衝撃にも耐え、電池の信頼性を向上させ
た。As is clear from the comparison of the weld loss ratio in the drop test of the batteries of Example 1 and Example 2 in (Table 1), the vent hole and the protrusion were formed and the tip of the protrusion was formed flat. By installing the metal plate as an inner terminal plate inside the explosion-proof sealing plate, the overall strength of the explosion-proof sealing plate has been increased, and it has withstood a shock to the battery, improving the reliability of the battery.
【００２８】[0028]
【表１】 [Table 1]
【００２９】[0029]
【発明の効果】以上記述した如く本発明によれば、電流
遮断圧を決定づける溶接部の溶接強度そのものを安定化
させることができ、電池の短絡・過充電・逆充電等の状
態においても、所定の電池内圧で精度良く電気的導通を
遮断するため信頼性の高い密閉型電池を得ることができ
る。As described above, according to the present invention, it is possible to stabilize the welding strength itself of the welded portion that determines the current cutoff pressure, and even when the battery is short-circuited, overcharged, or reverse-charged, the predetermined strength can be maintained. Since the electric conduction is accurately cut off by the battery internal pressure, it is possible to obtain a highly reliable sealed battery.
【図１】本発明内端子板を設けた防爆封口板の側面断面
図FIG. 1 is a side sectional view of an explosion-proof sealing plate provided with an inner terminal plate of the present invention.
【図２】本発明防爆封口板を用いた密閉型電池上部の側
面断面図FIG. 2 is a side sectional view of an upper portion of a sealed battery using the explosion-proof sealing plate of the present invention.
【図３】実施例１における電池評価試験結果を示す図FIG. 3 is a diagram showing a battery evaluation test result in Example 1.
【図４】従来例の防爆封口板上部の側面断面図FIG. 4 is a side sectional view of an upper portion of the conventional explosion-proof sealing plate.
【符号の説明】 １ キャップ状端子 ２ ＰＴＣ素子 ３ 防爆弁体 ３ａ 易破断性薄肉部 ４ 絶縁インナーガスケット ５ 溶着部 ６ 内端子板 ６ａ 通気孔 ６ｂ 突起部 ７ 金属ケース ７ａ 通気孔 ７ｂ 突起部 ８ 外装缶 ９ 絶縁ガスケット[Explanation of reference symbols] 1 Cap-shaped terminal 2 PTC element 3 Explosion-proof valve body 3a Easily rupturable thin wall portion 4 Insulating inner gasket 5 Welding portion 6 Inner terminal plate 6a Vent hole 6b Protrusion portion 7 Metal case 7a Vent hole 7b Protrusion portion 8 Exterior Can 9 insulating gasket
フロントページの続き (72)発明者 飯田 守 大阪府門真市大字門真1006番地 松下電器 産業株式会社内Continued on the front page (72) Inventor Mamoru Iida 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (2)
りシールカシメされた防爆機能および端子を兼ねる防爆
封口板において、前記防爆封口板は、少なくとも端子キ
ャップ、ＰＴＣ素子、防爆弁体、および絶縁インナーガ
スケットを金属ケースに収納させて一体カシメされた防
爆封口板であって、前記防爆弁体には、破断性薄肉部が
形成されており、この防爆弁体と通気孔と突起部を有し
突起部先端がフラットに形成されてなる金属板が、前記
絶縁インナーガスケットを介して、前記突起部フラット
面で溶接されてなることを特徴とする２次電池用防爆封
口板。1. An explosion-proof sealing plate having an explosion-proof function and a terminal, which is seal-caged by an insulating gasket at an upper end opening of an outer can, wherein the explosion-proof sealing plate is at least a terminal cap, a PTC element, an explosion-proof valve body, and an insulating inner. An explosion-proof sealing plate in which a gasket is housed in a metal case and integrally caulked, wherein the explosion-proof valve body has a thin rupturable portion formed, and the explosion-proof valve body, a vent hole, and a protrusion are provided. An explosion-proof sealing plate for a secondary battery, characterized in that a metal plate having a flat tip is welded to the flat surface of the protrusion through the insulating inner gasket.
トに形成されてなる金属板が内端子板として前記防爆封
口板内に設置されたことを特徴とする請求項１記載の２
次電池用防爆封口板。2. The explosion-proof sealing plate as set forth in claim 1, wherein a metal plate having a vent hole and a protrusion and having a flat tip at the protrusion is installed as an inner terminal plate in the explosion-proof sealing plate.
Explosion-proof sealing plate for secondary battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8007066A JPH09199106A (en) | 1996-01-19 | 1996-01-19 | Explosion-proof sealing plate for secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8007066A JPH09199106A (en) | 1996-01-19 | 1996-01-19 | Explosion-proof sealing plate for secondary cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09199106A true JPH09199106A (en) | 1997-07-31 |
Family
ID=11655707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8007066A Pending JPH09199106A (en) | 1996-01-19 | 1996-01-19 | Explosion-proof sealing plate for secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09199106A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010038816A (en) * | 1999-10-27 | 2001-05-15 | 김순택 | Sealed battery and cap assembly used in the same |
| US6537693B1 (en) | 1999-11-22 | 2003-03-25 | Nec Tokin Corporation | Secondary battery and method of manufacturing same |
| KR100399343B1 (en) * | 1999-09-07 | 2003-09-26 | 주식회사 엘지화학 | Lithium ion battery with current interrupt device |
| KR100619631B1 (en) * | 2004-08-31 | 2006-09-12 | 주식회사 엘지화학 | Improved Lithium Secondary Battery |
| EP1777762A3 (en) * | 2005-10-21 | 2007-12-26 | Matsushita Electric Industrial Co., Ltd. | Alkaline battery |
| KR100889765B1 (en) * | 2001-10-30 | 2009-03-24 | 삼성에스디아이 주식회사 | Lithium ion polymer cell |
| US7537860B2 (en) | 2005-10-21 | 2009-05-26 | Panasonic Corporation | Alkaline battery |
| WO2010044554A1 (en) * | 2008-10-14 | 2010-04-22 | 주식회사 엘지화학 | Cap assembly with improved stability and cylindrical secondary battery including the same |
| WO2012050343A2 (en) * | 2010-10-15 | 2012-04-19 | 주식회사 엘지화학 | Cap assembly having novel structure and cylindrical battery containing same |
| JP2012109146A (en) * | 2010-11-18 | 2012-06-07 | Toyota Motor Corp | Power storage device control apparatus and vehicle mounting the same thereon and power storage device control method |
| JP2016015228A (en) * | 2014-07-01 | 2016-01-28 | 株式会社豊田自動織機 | Current cutoff device, power storage device, manufacturing method of current cutoff device and manufacturing method of power storage device |
| CN107170918A (en) * | 2016-10-18 | 2017-09-15 | 深圳市比克动力电池有限公司 | A kind of lithium ion power battery explosion protection cover and its manufacture method |
| CN107339478A (en) * | 2017-07-27 | 2017-11-10 | 惠州市沃瑞科技有限公司 | It is a kind of to be applied to the explosion-proof vent valve with metallic rupture disk on new-energy automobile |
| US10615401B2 (en) | 2015-03-27 | 2020-04-07 | Sanyo Electric Co., Ltd. | Cylindrical batteries |
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| JPH06338323A (en) * | 1993-05-28 | 1994-12-06 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolytic secondary battery |
| JPH07105933A (en) * | 1993-10-06 | 1995-04-21 | Hitachi Maxell Ltd | Anti-explosive enclosed battery |
| JPH07201308A (en) * | 1993-12-28 | 1995-08-04 | Matsushita Electric Ind Co Ltd | Sealing plate for sealed battery |
| JPH07254402A (en) * | 1994-03-15 | 1995-10-03 | Toshiba Battery Co Ltd | Sealed battery |
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1996
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|---|---|---|---|---|
| JPH06338323A (en) * | 1993-05-28 | 1994-12-06 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolytic secondary battery |
| JPH07105933A (en) * | 1993-10-06 | 1995-04-21 | Hitachi Maxell Ltd | Anti-explosive enclosed battery |
| JPH07201308A (en) * | 1993-12-28 | 1995-08-04 | Matsushita Electric Ind Co Ltd | Sealing plate for sealed battery |
| JPH07254402A (en) * | 1994-03-15 | 1995-10-03 | Toshiba Battery Co Ltd | Sealed battery |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100399343B1 (en) * | 1999-09-07 | 2003-09-26 | 주식회사 엘지화학 | Lithium ion battery with current interrupt device |
| KR20010038816A (en) * | 1999-10-27 | 2001-05-15 | 김순택 | Sealed battery and cap assembly used in the same |
| US6537693B1 (en) | 1999-11-22 | 2003-03-25 | Nec Tokin Corporation | Secondary battery and method of manufacturing same |
| KR100889765B1 (en) * | 2001-10-30 | 2009-03-24 | 삼성에스디아이 주식회사 | Lithium ion polymer cell |
| KR100619631B1 (en) * | 2004-08-31 | 2006-09-12 | 주식회사 엘지화학 | Improved Lithium Secondary Battery |
| EP1777762A3 (en) * | 2005-10-21 | 2007-12-26 | Matsushita Electric Industrial Co., Ltd. | Alkaline battery |
| US7534526B2 (en) | 2005-10-21 | 2009-05-19 | Panasonic Corporation | Alkaline battery |
| US7537860B2 (en) | 2005-10-21 | 2009-05-26 | Panasonic Corporation | Alkaline battery |
| WO2010044554A1 (en) * | 2008-10-14 | 2010-04-22 | 주식회사 엘지화학 | Cap assembly with improved stability and cylindrical secondary battery including the same |
| CN102165624A (en) * | 2008-10-14 | 2011-08-24 | 株式会社Lg化学 | Cap assembly with improved stability and cylindrical secondary battery including the same |
| US8383258B2 (en) | 2008-10-14 | 2013-02-26 | Lg Chem, Ltd. | Cap assembly of improved safety and cylindrical secondary battery employed with the same |
| WO2012050343A2 (en) * | 2010-10-15 | 2012-04-19 | 주식회사 엘지화학 | Cap assembly having novel structure and cylindrical battery containing same |
| WO2012050343A3 (en) * | 2010-10-15 | 2012-06-21 | 주식회사 엘지화학 | Cap assembly having novel structure and cylindrical battery containing same |
| US8968898B2 (en) | 2010-10-15 | 2015-03-03 | Lg Chem, Ltd. | Cap assembly of novel structure and cylindrical battery employed with the same |
| JP2012109146A (en) * | 2010-11-18 | 2012-06-07 | Toyota Motor Corp | Power storage device control apparatus and vehicle mounting the same thereon and power storage device control method |
| JP2016015228A (en) * | 2014-07-01 | 2016-01-28 | 株式会社豊田自動織機 | Current cutoff device, power storage device, manufacturing method of current cutoff device and manufacturing method of power storage device |
| US10615401B2 (en) | 2015-03-27 | 2020-04-07 | Sanyo Electric Co., Ltd. | Cylindrical batteries |
| CN107170918A (en) * | 2016-10-18 | 2017-09-15 | 深圳市比克动力电池有限公司 | A kind of lithium ion power battery explosion protection cover and its manufacture method |
| CN107339478A (en) * | 2017-07-27 | 2017-11-10 | 惠州市沃瑞科技有限公司 | It is a kind of to be applied to the explosion-proof vent valve with metallic rupture disk on new-energy automobile |
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