JP3233679B2 - Manufacturing method of battery safety valve device - Google Patents
Manufacturing method of battery safety valve deviceInfo
- Publication number
- JP3233679B2 JP3233679B2 JP12099092A JP12099092A JP3233679B2 JP 3233679 B2 JP3233679 B2 JP 3233679B2 JP 12099092 A JP12099092 A JP 12099092A JP 12099092 A JP12099092 A JP 12099092A JP 3233679 B2 JP3233679 B2 JP 3233679B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- safety valve
- valve device
- battery container
- thickness
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、安全防爆式の密閉電池
の安全弁装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety explosion-proof type safety valve device for a sealed battery.
【０００２】[0002]
【従来の技術】従来、電池内部のガス圧上昇時に作動す
る各種の過圧放出安全弁が提案されている。しかし、例
えば特開昭５５−１３６１３１号で開示されている正極
活物質にリチウム複合金属酸化物を用いた非水系の二次
電池、もしくは、特開昭６２−９０８６３号，特開昭６
３−２９９０５６号等で開示されている非水系の二次電
池、すなわち、正極活物質にリチウム複合金属酸化物を
用い、負極活物質に炭素質材料を用いる非水系二次電池
等の場合には、通常使用時にはほとんど電池缶の内部の
圧力は高くならないが、両極活物質、電解液等が水分、
酸素等と反応すると電池の性能が徐々に低下するので、
この種の電池では可逆式の安全弁は不適当である。すな
わち、水分、酸素等によって性能が低下する電池等で
は、完全密閉構造をとることが好ましい。2. Description of the Related Art Various overpressure release safety valves which operate when the gas pressure inside a battery rises have been proposed. However, for example, a non-aqueous secondary battery using a lithium composite metal oxide as a positive electrode active material disclosed in JP-A-55-136131 or JP-A-62-90863 and JP-A-6-90863
In the case of a non-aqueous secondary battery disclosed in Japanese Patent Application Laid-open No. 3-29956, that is, a non-aqueous secondary battery using a lithium composite metal oxide as a positive electrode active material and a carbonaceous material as a negative electrode active material, During normal use, the pressure inside the battery can hardly rises, but the bipolar active material, electrolyte, etc.
When reacting with oxygen etc., the performance of the battery gradually decreases,
Reversible safety valves are unsuitable for this type of battery. That is, for a battery or the like whose performance is reduced by moisture, oxygen, or the like, it is preferable to adopt a completely sealed structure.
【０００３】しかしながら、完全密閉構造を有する電池
では、密閉性が高まり、貯蔵性に優れる反面、高温に加
熱された場合、もしくは、高電圧、大電流で充電された
場合等といった異常な条件の下では、電池内部の圧力が
上昇し、その結果、電池缶が破裂し、電池の内容物が飛
散して、人的もしくは物的被害を引き起こす恐れがあ
る。[0003] However, a battery having a completely sealed structure has an improved sealing property and excellent storage properties, but under abnormal conditions such as when heated to a high temperature or when charged with a high voltage or a large current. In such a case, the pressure inside the battery rises, and as a result, the battery can ruptures and the contents of the battery are scattered, which may cause human or property damage.
【０００４】そこで、密閉型の電池においては、電池内
部の圧力が電池缶あるいは電池封口部の限界耐圧以上に
なって爆発を引き起こさないように、あらかじめ切込部
を設け、切裂によって、圧力を開放する提案が種々なさ
れている。これに属するもののとして、密閉型アルカリ
ボタン電池に十字型の切込を設け交点の肉厚を制御する
方法（実公昭５８−１７３３２号）、扁平形の密閉電池
に関し、電池缶内の圧力が上昇した際の応力が最も集中
する部分の耐圧を他の部分に対し、相対的に下げる目的
で切欠を施す方法（実開昭６０−６５９７０号）、電池
容器の底部に溝を形成するにあたり、底部に平坦部を有
し、底部の中心に交点を持つ溝を形成する方法（特開昭
６３−８６２４４号，特開昭６３−８６２４６号）、電
池容器の底部の内面に溝をつける方法（特開昭６３−８
６２４５号）、電池容器の底部に両端で分岐した直線状
の切欠溝をつける方法（特開平１−３０９２５２，特開
平１−３０９２５３）等の提案がある。[0004] Therefore, in a sealed battery, a notch is provided in advance so that an explosion is not caused when the pressure inside the battery exceeds the limit withstand voltage of the battery can or the battery sealing portion. There are various proposals for opening. As a class of this, a method of providing a cross-shaped notch in a sealed alkaline button battery to control the thickness of the intersection (Japanese Utility Model Publication No. 58-17332); A notch in order to lower the pressure resistance of the part where the stress is most concentrated relative to other parts (Japanese Utility Model Application Laid-open No. 60-65970). In forming a groove in the bottom of the battery container, A method of forming a groove having a flat portion at the center of the bottom and an intersection at the center of the bottom (JP-A-63-86244, JP-A-63-86246), and a method of forming a groove on the inner surface of the bottom of the battery container 63-8
No. 6245), and a method of providing a linear cutout groove branched at both ends in the bottom of the battery container (JP-A-1-309252, JP-A-1-309253).
【０００５】ところで、完全密閉型の電池においても、
電池容器が破裂して内容物が飛散することがない程度
に、電池容器の耐圧を低くすることが必要であるが、そ
の一方で電池容器に外的な衝撃が加えられた場合、簡単
に電池容器の密閉状態が破壊されるようなことがあって
は使用に耐えない。すなわち、完全密閉型の電池ではは
構造的に丈夫であって、しかも、電池容器の耐圧は充分
に低く、安定していることが必要である。[0005] By the way, even in a completely sealed type battery,
It is necessary to lower the pressure resistance of the battery container so that the battery container does not rupture and the contents are scattered.On the other hand, if an external impact is applied to the battery container, If the closed state of the container is broken, it cannot be used. That is, it is necessary for a completely sealed battery to be structurally strong, and for the battery container to be sufficiently low in pressure resistance and stable.
【０００６】ところが、従来の電池容器の一部分に切込
を入れる完全密閉型の電池では、プレス加工、ウエット
エッチング等の加工法で、切込の残肉厚のばらつきを小
さく制御することは難しく、したがって、安全性の確保
される圧力範囲内の所望の圧力、特に３０ｋｇ／ｃｍ2
以下の低い圧力で安定して精度良く作動する安全弁装置
を製作することは非常に難しかった。However, in a conventional completely sealed battery in which a cut is made in a part of a battery container, it is difficult to control the variation in the remaining thickness of the cut by a processing method such as press working or wet etching. Therefore, a desired pressure within a pressure range in which safety is ensured, in particular, 30 kg / cm 2
It has been very difficult to produce a safety valve device that operates stably and accurately at the following low pressures.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、完全密閉型
の電池において、電池容器の防爆機能が電池の内部の圧
力の上昇に対応して、安全性の確保される圧力範囲の所
望の圧力で安定して精度良く作動する安全防爆式の安全
弁装置を提供することを目的とする。SUMMARY OF THE INVENTION The present invention relates to a completely sealed battery, in which the explosion-proof function of the battery container corresponds to an increase in the pressure inside the battery and the desired pressure within a pressure range in which safety is ensured. It is an object of the present invention to provide a safety explosion-proof safety valve device that operates stably and accurately.
【０００８】[0008]
【課題を解決するための手段】本発明は、予め貫通溝を
形成した厚さ０．１ｍｍ以下の金属板と厚さ０．１ｍｍ
以下の金属板とを熱圧着することにより、電池外装蓋の
一部分に切込を入れた安全防爆式の密閉電池の安全弁装
置を製造する方法において、該熱圧着を真空炉中で加熱
・加圧することにより行うことを特徴とする電池の安全
弁装置を製造する方法である。According to the present invention, a metal plate having a thickness of 0.1 mm or less in which a through groove is formed in advance and a thickness of 0.1 mm or less are provided.
By thermocompression bonding with the following metal plate ,
Explosion-proof sealed battery safety valve with a cut in part
Heating the thermocompression bonding in a vacuum furnace.
A method for producing a battery safety valve device, which is performed by pressurizing .
【０００９】即ち、従来の電池容器の一部分に、プレス
加工、ウェットエッチング等の加工法で切込を入れ、切
込の残肉厚を制御し、電池容器の防爆機能の作動圧を制
御する方法では、製造ロットが異なった場合は言うまで
もなく、製造ロットが同じでも切込の残肉厚の加工精度
を１０μｍ以下に抑え、再現性を維持することは容易で
はないが、本発明によれば、張り合わせる金属板の板厚
で、切込の残肉厚を制御できるので、経時的に再現性よ
く切込の残肉厚の加工精度を１０μｍ以下に抑えること
は容易である。すなわち、電池容器の防爆機構の作動圧
を再現性よく安定させることができる。金属板の張り合
わせは、熱圧着が望ましいが、この場合、金属板を熱圧
着で張り合わせることによって、張り合わせると同時に
金属板が焼鈍され、金属板の機械的な特性が安定するの
で、電池容器の安全弁装置の作動圧の安定に寄与する。That is, a method of forming a cut in a part of a conventional battery container by a working method such as press working or wet etching, controlling the remaining thickness of the cut, and controlling the operating pressure of an explosion-proof function of the battery container. So, let's say if the production lot is different
None , even if the production lot is the same, it is not easy to maintain the processing accuracy of the remaining thickness of the cut to 10 μm or less and maintain reproducibility, but according to the present invention, the thickness of the metal plates to be laminated is Since the remaining thickness of the cut can be controlled, it is easy to suppress the processing accuracy of the remaining thickness of the cut to 10 μm or less with good reproducibility over time. That is, the operating pressure of the explosion-proof mechanism of the battery container can be stabilized with good reproducibility. The bonding of the metal plates is preferably performed by thermocompression bonding. In this case, the metal plates are bonded by thermocompression bonding, and the metal plates are annealed at the same time as the bonding, and the mechanical properties of the metal plates are stabilized. Contributes to stabilization of the operating pressure of the safety valve device.
【００１０】また、金属板厚は、少なくとも１枚は板厚
が０．１ｍｍ以下であることが好ましい。さらに、３枚
以上の金属板を熱圧着によって張り合わせ、電池容器の
板厚を部分的に少なくとも３段階に変えることによっ
て、落下、振動等の耐衝撃性を向上させることができ
る。すなわち、電池容器の安全弁装置の周囲の板厚を厚
くすることで、衝撃による電池容器の変形を最小限に抑
え、衝撃による安全弁装置の誤作動を防止し、電池容器
の内圧のみに依存して、安全弁装置を精度よく安定して
作動させることができる。It is preferable that at least one metal plate has a thickness of 0.1 mm or less. Further, by bonding three or more metal plates by thermocompression bonding and partially changing the thickness of the battery container to at least three stages, it is possible to improve the impact resistance such as dropping and vibration. That is, by increasing the thickness of the plate around the safety valve device of the battery container, deformation of the battery container due to impact is minimized, malfunction of the safety valve device due to impact is prevented, and only the internal pressure of the battery container depends. In addition, the safety valve device can be accurately and stably operated.
【００１１】ところで、本発明の方法は電池外装蓋の一
部分に安全弁を形成する。具体的に説明すると、貫通溝
を形成した金属板、薄い金属板と貫通穴を形成した蓋ボ
ディを熱圧着によって張り合わせて電池外装蓋を製作す
れば、電池外装缶の一部分に形成するのに比べて真空炉
にいれる場合に比較的嵩張らないで、本発明による構造
を実現でき、しかも、安全弁を一つ一つ電池外装容器に
溶接する手間が省ける。By the way, according to the method of the present invention, a safety valve is formed on a part of the battery outer cover . More specifically, if a battery outer cover is manufactured by bonding a metal plate having a through groove, a thin metal plate and a lid body having a through hole by thermocompression bonding, compared to forming a part of the battery outer can, Therefore, the structure according to the present invention can be realized without being relatively bulky when placed in a vacuum furnace, and the trouble of welding each safety valve to the battery outer container can be eliminated.
【００１２】通常、当該電池容器はステンレススチー
ル、ニッケルメッキ加工炭素鋼等で製作される場合が多
いが、耐食性等に支障がなければ、特に限定されるもの
ではないが、真空炉中で加熱、加圧することによって熱
圧着が可能な材質であることが必要である。すなわち、
ステンレススチール、鉄、ニッケル等の材質が使用可能
である。Usually, the battery container is often made of stainless steel, nickel-plated carbon steel, or the like, but is not particularly limited as long as it does not impair corrosion resistance. It is necessary that the material be capable of thermocompression by pressing. That is,
Materials such as stainless steel, iron and nickel can be used.
【００１３】[0013]
【作用】本発明により、電池容器の内部の圧力が上昇し
た場合に、精度よく、低い圧力で電池容器の安全弁装置
を作動させることができる。According to the present invention, when the pressure inside the battery container rises, the safety valve device of the battery container can be operated accurately and at a low pressure.
【００１４】[0014]
【実施例】つぎに実施例をあげて本発明を説明する。Next, the present invention will be described with reference to examples.
【００１５】[0015]
【実施例１】従来、図１に示すような切欠溝をプレス加
工、ウエットエッチング等で形成した金属板を電池容器
の開口部に溶接するか、もしくは、直接金属製の電池容
器にプレス加工を施し、切欠溝を形成する方法によっ
て、電池容器に防爆機能を持たせていた電池では、切欠
溝の残肉厚は同一製造ロット内で１０μｍ以上の幅を持
つことは希ではなく、さらに、製造ロットが異なった場
合、残肉厚の平均値が１０μｍ程度ふれることも多かっ
た。その結果、電池容器の防爆機能が作動する圧力を２
０ｋｇ／ｃｍ2 程度もしくは２０ｋｇ／ｃｍ2 以下に安
定して、再現性良く制御することは容易ではない。[Embodiment 1] Conventionally, a metal plate formed by pressing a notch groove as shown in FIG. 1 by wet etching or the like is welded to an opening of a battery container, or directly pressed into a metal battery container. In the case of a battery in which the battery container is provided with an explosion-proof function by the method of forming the notch groove, the remaining thickness of the notch groove is not rarely 10 μm or more within the same manufacturing lot. When the lots were different, the average value of the remaining wall thickness often fluctuated by about 10 μm. As a result, the pressure at which the explosion-proof function of the battery
It is not easy to control stably to about 0 kg / cm @ 2 or less than 20 kg / cm @ 2 with good reproducibility.
【００１６】図２に２枚の金属板を熱圧着によって張り
合わせることで、切欠溝を形成した電池外装蓋用金属板
の構造を示す。このように、２枚の金属板を熱圧着で張
り合わせて切欠溝を形成した金属板を使用した場合に
は、切欠溝の残肉厚を１０μｍ以下の幅に管理すること
は、図２の３の金属薄板の厚さ１０μｍ以下の幅に管理
することであり、残肉厚を１０μｍ〜１００μｍ程度に
設定する場合には、残肉厚のばらつきの幅を常に２〜３
μｍ以下に押さえることも可能である。これによって、
電池容器の防爆機能が作動する圧力を２０ｋｇ／ｃｍ2
程度もしくは２０ｋｇ／ｃｍ2以下に安定して設定する
ことが可能である。FIG. 2 shows a structure of a metal plate for a battery exterior lid in which a notch groove is formed by bonding two metal plates by thermocompression bonding. In the case of using a metal plate in which a notch groove is formed by bonding two metal plates by thermocompression bonding, it is necessary to control the remaining thickness of the notch groove to a width of 10 μm or less as shown in FIG. In the case where the remaining thickness is set to about 10 μm to 100 μm, the width of the variation of the remaining thickness is always 2 to 3 μm.
It is also possible to hold down to μm or less. by this,
The pressure at which the explosion-proof function of the battery container operates is set to 20 kg / cm 2
It can be set stably to about 20 kg / cm 2 or less.
【００１７】７０μｍのＳＵＳ３０４の薄板にウェット
エッチングで溝を貫通し、図２の２に相当する金属板と
し、図２の３の金属薄板として３０μｍのＳＵＳ３０４
の薄板を用い、この２枚を重ね合わせ、真空炉中で加圧
して約１０００℃に加熱し、熱圧着する。さらに、電池
蓋の大きさに打ち抜き、図２の構造の安全弁を製作す
る。この安全弁装置は１８ｋｇ／ｃｍ2で安定して作動
する。The SUS304 thin plate of 70 μm is penetrated by wet etching to form a metal plate corresponding to 2 in FIG. 2, and the SUS304 plate of 30 μm as 3 in FIG.
These two sheets are superimposed, pressurized in a vacuum furnace, heated to about 1000 ° C., and thermocompression bonded. In addition, batteries
A safety valve having the structure shown in FIG. 2 is manufactured by punching into the size of the lid . This safety valve device operates stably at 18 kg / cm 2 .
【００１８】なお、図面では実際の寸法比率にはなって
いない。The drawings do not show the actual dimensional ratios.
【００１９】[0019]
【実施例２】さらに、本発明によれば、図３のような周
囲に補強リング４のある構造の安全弁は、あらかじめ
溝、窓を開ける加工を施した３枚の金属板を同時に熱圧
着することによって容易に製作できる。この構造を採用
することで、２および３の金属板に、より薄いものを用
い、より低圧で安定して作動する安全弁装置を製作する
場合でも、電池容器の一部分に開けられた開口部を閉塞
するように溶接等によって容易に電池容器に取り付ける
ことができ、しかも、取り付け法のばらつきが安全弁装
置の作動圧に影響を及ぼしにくい安全弁装置を作ること
ができる。補強のリングの厚さは、実施例１のケースで
は０．２ｍｍ〜０．５ｍｍで充分であるが、安全弁のサ
イズによって異なる。[Embodiment 2] Further, according to the present invention, a safety valve having a structure having a reinforcing ring 4 around it as shown in FIG. 3 simultaneously heat-presses three metal plates which have been previously processed to open a groove and a window. It can be easily manufactured. By adopting this structure, even if a thinner metal plate is used for the second and third metal plates and a safety valve device that operates stably at a lower pressure is manufactured, the opening formed in a part of the battery container is closed. As a result, the safety valve device can be easily attached to the battery container by welding or the like, and furthermore, it is possible to produce a safety valve device in which variation in the mounting method hardly affects the operating pressure of the safety valve device. In the case of the first embodiment, the thickness of the reinforcing ring is sufficient to be 0.2 mm to 0.5 mm, but varies depending on the size of the safety valve.
【００２０】[0020]
【実施例３】次に、角形電池の外装蓋に本発明を適用す
る例を示す。実施例２と同様に、あらかじめ溝、窓を開
ける加工を施した３枚の金属板を同時に熱圧着した後
に、ガラス−メタルハウメチック端子を形成した例を、
図４に示す。このように外装蓋に安全弁を作り込み、電
池に組み立てることで、開口面積が広く、作動圧が安定
した安全弁装置を作ることができる。Embodiment 3 Next, an example in which the present invention is applied to an outer cover of a prismatic battery will be described. In the same manner as in Example 2, an example in which a glass-metal haumetic terminal was formed after three metal plates that had been subjected to a process of opening a groove and a window were thermocompression-bonded at the same time,
As shown in FIG. As described above, by forming the safety valve in the outer cover and assembling the battery, a safety valve device having a large opening area and a stable operating pressure can be manufactured.
【００２１】また、図５のように、安全弁の保護のため
に開口部の一部にバーを設ける構造、電池蓋と電池缶の
溶接代を設ける構造、ハウメチック端子の両脇に安全弁
を設ける構造等を取り入れることも可能である。Also, as shown in FIG. 5, a structure in which a bar is provided in a part of the opening to protect the safety valve, a structure in which a margin for welding between the battery lid and the battery can is provided, and a structure in which safety valves are provided on both sides of the howmetic terminal. It is also possible to adopt such as.
【００２２】[0022]
【発明の効果】本発明により、電池容器の内部の圧力が
上昇した場合に、再現性よく、低い圧力で精度よく作動
する電池容器の安全弁装置を提供することができる。According to the present invention, it is possible to provide a safety valve device for a battery container that operates with high reproducibility and low pressure with high accuracy when the pressure inside the battery container increases.
【図１】本発明の比較例の安全弁の１例。FIG. 1 shows an example of a safety valve according to a comparative example of the present invention.
【図２】本発明の実施例の安全弁の１例。FIG. 2 shows an example of a safety valve according to an embodiment of the present invention.
【図３】本発明の実施例の安全弁の１例。FIG. 3 is an example of a safety valve according to an embodiment of the present invention.
【図４】本発明の実施例の角形電池の外装蓋の１例。FIG. 4 is an example of an outer cover of a prismatic battery according to an embodiment of the present invention.
【図５】本発明の実施例の角形電池の外装蓋の１例。FIG. 5 is an example of an outer cover of a prismatic battery according to an embodiment of the present invention.
１．切欠溝加工を施してある金属板。 ２．貫通溝加工を施してある金属板。 ３．金属板。 ４．補強金属リング。 ５．蓋ボディ ６．封止ガラス。 ７．電極ピン。 ８．蓋カバー ９．樹脂パッキン。 1. Metal plate with notched grooves. 2. A metal plate with a through groove. 3. Metal plate. 4. Reinforced metal ring. 5. Lid body 6. Sealing glass. 7. Electrode pin. 8. Lid cover 9. Resin packing.
Claims (1)
下の金属板と厚さ０．１ｍｍ以下の金属板とを熱圧着す
ることにより、電池外装蓋の一部分に切込を入れた安全
防爆式の密閉電池の安全弁装置を製造する方法におい
て、該熱圧着を真空炉中で加熱・加圧することにより行
うことを特徴とする電池の安全弁装置を製造する方法。1. A safety device in which a metal plate having a thickness of 0.1 mm or less in which a through groove is formed in advance and a metal plate having a thickness of 0.1 mm or less are thermocompression-bonded to each other to form a cut in a part of a battery outer cover.
How to manufacture explosion-proof sealed battery safety valve devices
The thermocompression bonding is performed by heating and pressing in a vacuum furnace.
Method of manufacturing a safety valve device for a battery according to claim Ukoto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12099092A JP3233679B2 (en) | 1992-05-14 | 1992-05-14 | Manufacturing method of battery safety valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12099092A JP3233679B2 (en) | 1992-05-14 | 1992-05-14 | Manufacturing method of battery safety valve device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05314959A JPH05314959A (en) | 1993-11-26 |
| JP3233679B2 true JP3233679B2 (en) | 2001-11-26 |
Family
ID=14800057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12099092A Expired - Lifetime JP3233679B2 (en) | 1992-05-14 | 1992-05-14 | Manufacturing method of battery safety valve device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3233679B2 (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2246571C (en) * | 1996-02-15 | 2004-03-16 | Toyo Kohan Co., Ltd. | Cladding material |
| JP3108360B2 (en) * | 1996-02-15 | 2000-11-13 | 福田金属箔粉工業株式会社 | Battery safety valve element and battery case lid with safety valve |
| JP3204126B2 (en) * | 1996-10-29 | 2001-09-04 | ソニーケミカル株式会社 | Battery pressure valve |
| JP3070005B2 (en) * | 1996-12-09 | 2000-07-24 | 株式会社オプトニクス精密 | Method of manufacturing explosion-proof safety piece for batteries |
| US6737187B2 (en) | 1997-04-21 | 2004-05-18 | Toyo Kohan Co., Ltd. | Closed battery |
| TW367631B (en) * | 1997-04-21 | 1999-08-21 | Toyo Kohan Co Ltd | Closed battery |
| TW373348B (en) * | 1997-05-09 | 1999-11-01 | Toyo Kohan Co Ltd | Closed battery and closing member |
| MY124164A (en) * | 1997-05-09 | 2006-06-30 | Fukuda Metal Foil Powder | Closed battery and closing member |
| TW432737B (en) * | 1997-06-05 | 2001-05-01 | Toyo Kohan Co Ltd | Explosion-proof safety valve assemblage and closed secondary battery using it |
| TW369737B (en) * | 1997-06-05 | 1999-09-11 | Toyo Kohan Co Ltd | A closing plate of a battery covered with a protection film and a battery using same |
| JP3599967B2 (en) * | 1997-09-09 | 2004-12-08 | 松下電器産業株式会社 | Sealed battery |
| JPH1194196A (en) * | 1997-09-18 | 1999-04-09 | Oputonikusu Seimitsu:Kk | Explosion-proof safety valve for battery and manufacture therefor |
| DE69835993T2 (en) * | 1997-11-21 | 2007-04-26 | Sony Corp. | Non-aqueous electrolyte secondary battery provided with safety valve |
| JPH11219692A (en) * | 1997-11-21 | 1999-08-10 | Sony Corp | Nonaqueous electrolyte secondary battery |
| MY120789A (en) | 1998-01-16 | 2005-11-30 | Toyo Kohan Co Ltd | Closed battery and closing member |
| MY122324A (en) * | 1998-02-03 | 2006-04-29 | Toyo Kohan Co Ltd | A method of forming a protection film for a safety valve element, a safety valve element which is coated with a protection film, a closing plate for battery using same and a closed battery using same. |
| JP4625993B2 (en) * | 1998-09-30 | 2011-02-02 | パナソニック株式会社 | Explosion-proof valve device for battery, manufacturing method thereof and prismatic battery equipped with the explosion-proof valve device |
| MY123287A (en) * | 1998-11-19 | 2006-05-31 | Toyo Kohan Co Ltd | Safety device for closed battery and closed battery with it |
| TW463404B (en) * | 1999-05-24 | 2001-11-11 | Toyo Kohan Co Ltd | Forming method of protection coating for battery safety valve element, battery safety valve element with protection coating coated, battery sealed plate using the battery safety valve element and closed type battery using battery sealed plate |
| TW471196B (en) * | 1999-08-05 | 2002-01-01 | Toyo Kohan Co Ltd | Safety device of closed type battery |
| KR100428974B1 (en) * | 2001-11-08 | 2004-04-29 | 삼성에스디아이 주식회사 | Secondary battery applying safety device |
| JP2013200952A (en) * | 2012-03-23 | 2013-10-03 | Nisshin Steel Co Ltd | Battery container safety valve and method of manufacturing the same |
| JP2015015098A (en) | 2013-07-03 | 2015-01-22 | 株式会社神戸製鋼所 | Battery case and method of forming safety valve for battery case |
| JP6688037B2 (en) * | 2015-10-28 | 2020-04-28 | ニチコン株式会社 | Sealing body and electrolytic capacitor |
-
1992
- 1992-05-14 JP JP12099092A patent/JP3233679B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05314959A (en) | 1993-11-26 |
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