JP3426840B2 - Pressure cutoff sensor - Google Patents
Pressure cutoff sensorInfo
- Publication number
- JP3426840B2 JP3426840B2 JP07427496A JP7427496A JP3426840B2 JP 3426840 B2 JP3426840 B2 JP 3426840B2 JP 07427496 A JP07427496 A JP 07427496A JP 7427496 A JP7427496 A JP 7427496A JP 3426840 B2 JP3426840 B2 JP 3426840B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- external electrode
- battery
- packing
- cutoff sensor
- 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
Landscapes
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、二次電池のごとき
再充電により再生可能な蓄電池などの安全性を確保する
ために用いられる圧力遮断センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure cutoff sensor used for ensuring the safety of rechargeable rechargeable storage batteries such as secondary batteries.
【０００２】[0002]
【従来の技術】この種の蓄電池に充電が完了しても更に
充電を行ったり、規定された電流よりも大きな電流で充
電が行われると、蓄電池に異常が生じて蓄電池内に気体
が発生し、蓄電池内の圧力や温度が上昇し、蓄電池の膨
張、更には亀裂による電解液の滲み出しにより、蓄電池
が組み込まれた機器に悪影響を与えることがある。ま
た、これまでに至らなくとも、このような状態のままで
蓄電池の使用を継続すると、前述した蓄電池の膨張が進
行し、亀裂や破裂が生じる可能性があり、異常が生じた
蓄電池は速やかに使用を止める必要がある。2. Description of the Related Art If a storage battery of this type is further charged, or if it is charged with a current larger than a specified current, an abnormality occurs in the storage battery and gas is generated in the storage battery. The pressure and temperature inside the storage battery rise, the storage battery expands, and the electrolyte leaks out due to cracks, which may adversely affect the device in which the storage battery is incorporated. Further, even if it has not been achieved so far, if the storage battery is continuously used in such a state, the expansion of the storage battery described above may progress, cracks or ruptures may occur, and the storage battery in which the abnormality occurs promptly. You need to stop using it.
【０００３】そこで、従来より、この種の蓄電池には安
全対策が施されており、蓄電池内の圧力の上昇により開
き、蓄電池内の気体を排気する安全弁を蓄電池に設ける
タイプや、その温度上昇を検知して蓄電池が接続する電
気回路に電流を流さなくする手段を蓄電池外に設けたタ
イプなどがある。Therefore, conventionally, safety measures have been taken for this type of storage battery, such as a type in which the storage battery is provided with a safety valve that opens when the pressure in the storage battery rises and exhausts the gas in the storage battery, and its temperature rise. For example, there is a type in which a means is provided outside the storage battery to detect and prevent current from flowing in an electric circuit connected to the storage battery.
【０００４】ここで従来の圧力遮断センサの一例を図１
１により説明すると、図１１は従来の圧力遮断センサの
概略構成を示す説明図である。An example of a conventional pressure cutoff sensor is shown in FIG.
1 will be described. FIG. 11 is an explanatory diagram showing a schematic configuration of a conventional pressure cutoff sensor.
【０００５】図１１に示すように、従来の圧力遮断セン
サは、電池内圧の上昇に伴って変形する金属性の安全弁
４３と、この安全弁４３に設けた中央突起部４３ａに接
続されたリード４５と、安全弁４３とリード４５間に介
設されたリードストリッパ板４６と、安全弁４３とリー
ドストリッパ板４６を絶縁する絶縁板４７とを具備して
いる。この安全弁４３は蓄電池４０の内部に組み込ま
れ、その際、安全弁４３は有底円筒体状の電池ケース４
１に絶縁性のガスケット４２を介して電池蓋４４と共に
かしめられ、電池ケース４１の開口端を閉塞するように
固定される。電池蓋４４は蓄電池４０の正極端子を兼ね
るもので穴４４ａが形成されており、電池ケース４１は
蓄電池４０の負極端子を兼ねるものである。絶縁板４７
は一体化して設けられた額部４７ｃを有し、その額部４
７ｃによって絶縁板４７は安全弁４３の下に取り付けら
れる。リードストリッパ板４６は、額部４７ｃに設けら
れた溝に嵌め込むことによって絶縁板４７の真ぐ下に隣
接して取り付けられる。中央突起部４３ａは絶縁板４７
とリードストリッパ板４６に連通した穴４７ａ及び４６
ａに挿通され、その先端部にリード４５が接続される。As shown in FIG. 11, the conventional pressure cutoff sensor includes a metallic safety valve 43 which is deformed as the battery internal pressure rises, and a lead 45 which is connected to a central protrusion 43a provided on the safety valve 43. The reed stripper plate 46 is interposed between the safety valve 43 and the reed 45, and the insulating plate 47 that insulates the safety valve 43 and the reed stripper plate 46 from each other. The safety valve 43 is incorporated inside the storage battery 40, and at that time, the safety valve 43 is a battery case 4 having a cylindrical body with a bottom.
1 is caulked together with the battery lid 44 through the insulating gasket 42, and is fixed so as to close the open end of the battery case 41. The battery lid 44 also serves as a positive electrode terminal of the storage battery 40 and has a hole 44a formed therein, and the battery case 41 also serves as a negative electrode terminal of the storage battery 40. Insulation plate 47
Has an integrated forehead 47c, and the forehead 4
The insulating plate 47 is attached below the safety valve 43 by 7c. The lead stripper plate 46 is attached immediately below the insulating plate 47 by being fitted into a groove provided in the forehead portion 47c. The central protruding portion 43a is an insulating plate 47.
47a and 46 communicating with the lead stripper plate 46
The lead 45 is inserted into a and the lead 45 is connected to the tip thereof.
【０００６】電池ケース４１の内部には、巻芯４８と、
この巻芯４８に正極及び負極を巻回されて構成された発
電部４９とが収納されており、発電部４９の負極と電池
ケース４１とはリード５０を介して接続されている。ま
た、この電池ケース４１の内部は電解液（図示せず）で
満たされている。Inside the battery case 41, a winding core 48,
A power generation unit 49 configured by winding a positive electrode and a negative electrode around the winding core 48 is housed, and the negative electrode of the power generation unit 49 and the battery case 41 are connected via a lead 50. The inside of the battery case 41 is filled with an electrolytic solution (not shown).
【０００７】このような従来の圧力遮断センサは、発電
要素の異常な化学変化により蓄電池４０内の圧力が上昇
すると、上昇した圧力が安全弁４３に作用するため、安
全弁４３は持ち上げられると共に、リードストリッパ板
４６によって中央突起部４３ａとリード４５とを接続す
る導電路が剥離又は破断される。そして、さらに圧力が
増してそれが所定の圧力に達すると、安全弁４３の肉薄
部が破れ、電池ケース４１内の圧力上昇した気体が電池
蓋４４の穴４４ａを通して外部に開放される。In such a conventional pressure cutoff sensor, when the pressure inside the storage battery 40 rises due to an abnormal chemical change in the power generation element, the raised pressure acts on the safety valve 43, so that the safety valve 43 is lifted and the reed stripper is used. The plate 46 peels or breaks the conductive path connecting the central protrusion 43a and the lead 45. Then, when the pressure further increases and reaches a predetermined pressure, the thin portion of the safety valve 43 is broken, and the gas with increased pressure inside the battery case 41 is released to the outside through the hole 44a of the battery lid 44.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、前述し
た従来技術では、安全弁４３の中央突起部４３とリード
４５とを接続する導電路を破断するためのリードストリ
ッパ板４６が、安全弁４３の下方にあって蓄電池４０の
内部に配置されているので、導電路が破断したときにア
ークが飛ばないように留意する必要があり、その結果、
安全弁４３の形状や材質に制約を受け、設計上の自由度
が小さいという問題があった。However, in the above-mentioned prior art, the lead stripper plate 46 for breaking the conductive path connecting the central projection 43 of the safety valve 43 and the lead 45 is provided below the safety valve 43. Since it is disposed inside the storage battery 40, it is necessary to take care so that the arc does not fly when the conductive path is broken. As a result,
There is a problem in that the degree of freedom in design is small due to restrictions on the shape and material of the safety valve 43.
【０００９】[0009]
【課題を解決するための手段】本発明は、電池ケース内
に密閉状態で固定される作動部材に電池内部の圧力増加
で外側に変位する感圧部を設け、この作動部材の外側に
外部電極との導電路を有する破断部材を配置することと
する。このように作動部材の外側に破断部材を配置する
ことにより、破断部材の破断時に万一アークが飛んだと
しても、蓄電池内部のガスに引火する虞れがなくなり、
安全性の高い圧力遮断センサを提供することができる。SUMMARY OF THE INVENTION According to the present invention, an operating member fixed in a battery case in a hermetically sealed state is provided with a pressure sensitive portion that is displaced outward due to an increase in pressure inside the battery, and an external electrode is provided outside the operating member. A breaking member having a conductive path is arranged. By disposing the breaking member on the outside of the actuating member in this way, even if the arc should fly at the time of breaking the breaking member, there is no risk of ignition of the gas inside the storage battery,
It is possible to provide a highly safe pressure cutoff sensor.
【００１０】[0010]
【発明の実施の形態】本発明の圧力遮断センサでは、電
池の一方の電極となる外部電極と、電池ケース内に絶縁
体を介して密閉状態で固定され、電池内部の圧力増加に
より外側に変位する感圧部を有する導電性の作動部材
と、前記電池ケースに固定したとき前記作動部材より外
側に位置し、一端が前記外部電極に接続され、他端が前
記作動部材に接続された導電路を有し、前記感圧部の変
位により破断されて前記導電路を遮断する破断部材とを
備えている。BEST MODE FOR CARRYING OUT THE INVENTION In the pressure cutoff sensor of the present invention, an external electrode which is one of the electrodes of a battery is fixed in a hermetically sealed state inside a battery case via an insulator, and is displaced outward by an increase in pressure inside the battery. A conductive actuation member having a pressure-sensitive portion, and a conductive path located outside the actuation member when fixed to the battery case, having one end connected to the external electrode and the other end connected to the actuation member. And a breaking member that is broken by the displacement of the pressure-sensitive portion and interrupts the conductive path.
【００１１】また、本発明の圧力遮断センサでは、電池
の一方の電極となる外部電極と、電池ケース内に密閉状
態で固定され、電池内部の圧力増加により外側に変位す
る感圧部を有する作動部材と、前記電池ケースに固定し
たとき前記作動部材より外側に位置し、電池内部への電
路を有する導電性の支持体と、前記外部電極を支持する
絶縁性の保持部材と、前記外部電極と前記支持体間を接
続する導電路を有し、前記感圧部の変位により破断され
て前記導電路を遮断する破断部材とを備えている。この
場合、作動部材は変位により破断部材を破断するだけの
機能を持てば良く、必ずしも導電性は必要でないため、
作動部材の形状や材質の自由度が広がり、構造も簡単に
なる。Further, the pressure cutoff sensor of the present invention has an external electrode which is one of the electrodes of the battery, and a pressure sensitive portion which is fixed in the battery case in a sealed state and is displaced outward due to an increase in the pressure inside the battery. A member, a conductive support located outside the actuating member when fixed to the battery case, having an electric path to the inside of the battery, an insulating holding member supporting the external electrode, and the external electrode. A breaking member that has a conductive path connecting between the supports and that is broken by the displacement of the pressure-sensitive portion and interrupts the conductive path is provided. In this case, the actuating member has only to have a function of breaking the breaking member by displacement, and conductivity is not always necessary.
The degree of freedom of the shape and material of the operating member is expanded, and the structure is simple.
【００１２】前記導電路は前記外部電極に直接接続して
も良いが、これら導電路と外部電極との電路間にＰＴＣ
素子を配設すると、異常な高温となったとき電流を低下
させることができ、熱に対する安全性も高められる。The conductive paths may be directly connected to the external electrodes, but a PTC may be provided between the conductive paths and the external electrodes.
By disposing the element, the current can be reduced when the temperature becomes abnormally high, and the safety against heat can be improved.
【００１３】また、前記外部電極に開口部を設けると共
に、前記作動部材に感圧部と安全弁とを設けると、非常
時の防爆機構を兼用して、機構の簡略化やコストダウン
を図ることができ、特に、前記安全弁が感圧部を兼用す
るようにすると、破断部材が作動する圧力と安全弁が作
動する圧力を同時に管理しやすくなる。If an opening is provided in the external electrode and a pressure sensitive portion and a safety valve are provided in the actuating member, the mechanism can be simplified and the cost can be reduced by using the explosion-proof mechanism in an emergency. In particular, if the safety valve also serves as the pressure sensitive portion, it becomes easy to simultaneously manage the pressure at which the breaking member operates and the pressure at which the safety valve operates.
【００１４】また、前記外部電極に外側へ突出する突部
を設け、前記破断部材を該突部に収納させると、省スペ
ース化が図れ、蓄電池全体としての容量を高めることが
できる。If the external electrode is provided with a protrusion projecting outward and the breaking member is housed in the protrusion, space can be saved and the capacity of the entire storage battery can be increased.
【００１５】また、前記作動部材に熱処理で軟化された
部分を形成し、この軟化部分に囲まれた部位を前記感圧
部とすると、内部の圧力変化に迅速に応答して変位する
作動部材を実現できる。If a portion softened by heat treatment is formed on the actuating member and the portion surrounded by the softened portion is the pressure sensitive portion, an actuating member that is displaced in response to a change in internal pressure quickly is provided. realizable.
【００１６】また、前記電池ケースが電池の他方の電極
で、前記破断部材の導電路が前記外部電極と前記支持体
間を接続する場合、前記電極ケースの開口端に導電性の
蓋体を固着し、これら蓋体と支持体間に位置し両者間を
密閉する第１のパッキングを配設すると、極性が相反す
る外部電極と蓋体間の絶縁を確保できると共に、蓄電池
内部を気密に保持することができる。When the battery case is the other electrode of the battery and the conductive path of the breaking member connects between the external electrode and the support, a conductive lid is fixed to the open end of the electrode case. If a first packing is provided between the lid and the support and seals the two, the insulation between the external electrode and the lid, which have opposite polarities, can be secured, and the inside of the storage battery is kept airtight. be able to.
【００１７】また、前記支持体と前記作動部材間に位置
しこれら両者間を密閉する第２のパッキングを配設する
と、前記作動部材を導電性材料で形成することができる
と共に、蓄電池内部を気密に保持することができ、特
に、前記第１および第２のパッキングを一体化し、第２
のパッキングを折り返しにより支持体と作動部材間に位
置させると、組立作業性が向上する。Further, by disposing a second packing which is located between the support and the operating member and seals between them, the operating member can be made of a conductive material and the inside of the storage battery is airtight. In particular, the first and second packings can be integrated into a second
When the packing of (1) is folded back and positioned between the support and the operating member, the assembling workability is improved.
【００１８】[0018]
【実施例】実施例について図面を参照して説明すると、
図１は本発明の第１の実施例に係る圧力遮断センサの縦
断面図、図２は該圧力遮断センサの分解斜視図である。EXAMPLES Examples will be described with reference to the drawings.
1 is a longitudinal sectional view of a pressure cutoff sensor according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of the pressure cutoff sensor.
【００１９】図１と図２において、１は圧力遮断センサ
で、この圧力遮断センサ１は、ガスケット２、リード
３，４ａ，４ｂ、アクチュエータ５、パッキング６、遮
断用エレメント７、遮断用エレメント保持体８、ＰＴＣ
素子（positive temperature coefficient thermisto
r）９、外部電極１０から主に構成されている。In FIGS. 1 and 2, reference numeral 1 denotes a pressure cutoff sensor, which is a gasket 2, leads 3, 4a, 4b, actuator 5, packing 6, cutoff element 7, cutoff element holder. 8, PTC
Element (positive temperature coefficient thermisto
r) 9 and external electrodes 10 are mainly included.
【００２０】ガスケット２は絶縁性のＰＰ（ポリプロピ
レン）材からなり、上面が開放された、底板部２ａを有
する円筒部２ｂから構成され、この底板部２ａの中心に
は蓄電池に装着されたとき電池内部と連通させる丸孔部
２ｃと、丸孔部２ｃの周縁から外方に切り欠かれ、リー
ド３が下方（電池内部）に導出される切欠き部２ｄが設
けられている。このガスケット２内にはアクチュエータ
５が搭載されている。The gasket 2 is made of an insulative PP (polypropylene) material, and is composed of a cylindrical portion 2b having an open top surface and a bottom plate portion 2a. The center of the bottom plate portion 2a is a battery when mounted on a storage battery. A round hole portion 2c communicating with the inside and a cutout portion 2d that is cut outward from the peripheral edge of the round hole portion 2c and leads 3 to the lower side (inside the battery) are provided. An actuator 5 is mounted inside the gasket 2.
【００２１】アクチュエータ５は導電性のアルミニウム
材からなり、全体としてほぼ円盤状に形成されおり、そ
の外周部はガスケット２の底板部２ａ上に密着されて積
層されるフランジ部５ａと、中心部に上方向に頭部を平
坦とした円錐形状に膨出形成され、この平坦面に安全弁
用凹部５ｃを有する安全弁部５ｂと、安全弁部５ｂの頭
部平坦面の中央に突設された遮断用エレメント破断用突
部５ｄとから構成されている。このアクチュエータ５の
フランジ部５ａの下面にはリード３が溶着され、またフ
ランジ部５ａの上面にはリード４ｂが溶着されている。
この安全弁部５ｂは安全弁用凹部５ｃを有して安全弁と
して機能するほかに、遮断用エレメント破断用突部５ｄ
の感圧部としても機能する。また、アクチュエータ５の
上にはパッキング６が積装されている。The actuator 5 is made of a conductive aluminum material and is formed into a substantially disk shape as a whole. The outer peripheral portion of the actuator 5 is a flange portion 5a which is closely adhered to the bottom plate portion 2a of the gasket 2 and a central portion thereof. A safety valve portion 5b which is formed to bulge upward in a conical shape having a flat head and has a recess 5c for a safety valve on the flat surface, and a shut-off element projectingly provided at the center of the flat surface of the head of the safety valve portion 5b. It is composed of a breaking projection 5d. The lead 3 is welded to the lower surface of the flange portion 5a of the actuator 5, and the lead 4b is welded to the upper surface of the flange portion 5a.
The safety valve portion 5b has a safety valve concave portion 5c to function as a safety valve, and also has a shut-off element breaking projection 5d.
It also functions as a pressure-sensitive part. A packing 6 is mounted on the actuator 5.
【００２２】パッキング６は絶縁性のゴム材からなり、
全体として略円板状に形成されている。このパッキング
６はその外周縁に形成された環状の突条６ａと、中央に
穿設された丸孔部６ｂと、丸孔部６ｂの周縁に形成され
た環状の突条６ｃと、丸孔部６ｂの縁部から切り欠かれ
て形成された、リード４引き回し用の切欠き部６ｄと、
底板部６ｅとから構成されている。このパッキング６の
丸孔部６ｂの上方に遮断用エレメント７が配設されてい
る。The packing 6 is made of an insulating rubber material,
It is formed in a substantially disc shape as a whole. The packing 6 has an annular projection 6a formed on the outer peripheral edge thereof, a round hole 6b formed in the center, an annular projection 6c formed on the periphery of the round hole 6b, and a round hole. A notch 6d for leading the lead 4 formed by notching from the edge of 6b;
It is composed of a bottom plate portion 6e. A blocking element 7 is arranged above the round hole 6b of the packing 6.
【００２３】遮断用エレメント７は、絶縁性のセラミッ
ク又は樹脂製の基板７ａと、基板７ａの上面側に印刷形
成され又は金属箔を貼着されて形成された遮断用電路７
ｂとから構成され、遮断用電路７ｂの両端にリード４
ａ，４ｂがそれぞれ接続されると共に、これらリード４
ａ，４ｂは基板７ａに固定されている。そして、一方の
リード４ａはパッキング６の底板部６ｅ上に配置されて
ＰＴＣ素子９の下面に接続されており、したがって、パ
ッキング６の底板部６ｅ上にはリード４ａを挾み込んで
ＰＴＣ素子９が配置されている。また、他方のリード４
ｂはパッキング６の切欠き部６ｄからパッキング６の底
板部６ｅの下面側、つまりアクチュエータ５のフランジ
部５ａの上面に引き回され、前述したようにリード４ｂ
とアクチュエータ５のフランジ部５ａとを溶着してあ
る。The blocking element 7 is a substrate 7a made of an insulating ceramic or resin, and a blocking circuit 7 formed by printing on the upper surface of the substrate 7a or adhering a metal foil.
b, and leads 4 are provided at both ends of the breaking electric circuit 7b.
a and 4b are connected to each other and these leads 4
a and 4b are fixed to the substrate 7a. One lead 4a is arranged on the bottom plate portion 6e of the packing 6 and connected to the lower surface of the PTC element 9. Therefore, the lead 4a is sandwiched on the bottom plate portion 6e of the packing 6 and the PTC element 9 is inserted. Are arranged. Also, the other lead 4
b is routed from the notch 6d of the packing 6 to the lower surface side of the bottom plate 6e of the packing 6, that is, the upper surface of the flange 5a of the actuator 5, and as described above, the lead 4b.
And the flange portion 5a of the actuator 5 are welded together.
【００２４】ＰＴＣ素子９は円板状に形成され、中央に
丸孔部９ａが穿設されている。このＰＴＣ素子９は、温
度が高くなるとその導通抵抗値が増大して電流を低下さ
せるように作用するものであり、例えば、定常時の導通
抵抗値を２０ｍΩ、電流制御温度を＋１２０度に設定し
てある。The PTC element 9 is formed in a disc shape and has a round hole 9a formed in the center thereof. This PTC element 9 acts so that its conduction resistance value increases and the current decreases when the temperature rises. For example, the conduction resistance value in the steady state is set to 20 mΩ and the current control temperature is set to +120 degrees. There is.
【００２５】遮断用エレメント保持体８は熱可塑性樹脂
製で、上板部８ａと、上板部８ａの両端から下方へ延び
る一対の足部８ｂ，８ｂと、一対の足部８ｂ，８ｂの内
面に突設され、遮断用エレメント７の上面に対向して遮
断用エレメント７が下方から押されたとき支持する保持
突起部８ｃ，８ｃとから構成されている。この遮断用エ
レメント保持体８の上板部８ａと遮断用エレメント７の
上面との間には隙間が形成されて遮断用エレメント７が
折れ曲げられるようになっている。また、遮断用エレメ
ント保持体８はＰＴＣ素子９の丸孔部９ａ内にあり、遮
断用エレメント保持体８の一方の足部８ｂの下端面は一
方のリード４ａ上に配置され、他方の足部８ｂの下端面
はパッキング６の底板部６ｅ上に配置されている。The blocking element holder 8 is made of a thermoplastic resin, and has an upper plate portion 8a, a pair of leg portions 8b and 8b extending downward from both ends of the upper plate portion 8a, and inner surfaces of the pair of leg portions 8b and 8b. Of the holding elements 8c, 8c, which are provided so as to project toward the upper surface of the blocking element 7 and support the blocking element 7 when the blocking element 7 is pushed from below. A gap is formed between the upper plate portion 8a of the blocking element holder 8 and the upper surface of the blocking element 7 so that the blocking element 7 can be bent. The blocking element holder 8 is in the round hole 9a of the PTC element 9, and the lower end surface of one foot portion 8b of the blocking element holder 8 is arranged on one lead 4a and the other foot portion 8b. The lower end surface of 8b is arranged on the bottom plate portion 6e of the packing 6.
【００２６】外部電極１０は圧力遮断センサ１を蓄電池
に組み込んだとき、蓄電池の正極となるもので、ニッケ
ルやステンレス材等からなる。外部電極１０は、外周の
鍔部１０ａと、中央の膨出部１０ｂと、膨出部１０ｂの
傾斜側面に形成された複数の安全弁用開口部１０ｃ，１
０ｃ…とから構成されている。そして、外部電極１０
は、ガスケット２にリード３，４ａ，４ｂ、アクチュエ
ータ５、パッキング６、遮断用エレメント７、遮断用エ
レメント保持体８、ＰＴＣ素子９を組み込み、更に上方
から被せて挾み込み、図１に示すように、ガスケット２
の円筒部２ｂの上部を内側にかしめて固定する。この図
１の状態で、圧力遮断センサ１が組み立られて完成す
る。なお、図１の圧力遮断センサ１の上記かしめは仮か
しめであり、この圧力遮断センサ１を図３に示すように
蓄電池に組み込んで更に本かしめを行うことで、確実に
組み込んで電池ケースと密封できる。The external electrode 10 serves as a positive electrode of the storage battery when the pressure cutoff sensor 1 is incorporated into the storage battery, and is made of nickel, stainless steel or the like. The external electrode 10 includes a flange 10a on the outer periphery, a bulge 10b in the center, and a plurality of safety valve openings 10c, 1 formed on the inclined side surfaces of the bulge 10b.
0c ... Then, the external electrode 10
1, the lead 3, 4a, 4b, the actuator 5, the packing 6, the blocking element 7, the blocking element holder 8 and the PTC element 9 are assembled in the gasket 2, and further covered from above and sandwiched, as shown in FIG. On the gasket 2
The upper part of the cylindrical part 2b is fixed by caulking the inside. In the state of FIG. 1, the pressure cutoff sensor 1 is assembled and completed. The above-described crimping of the pressure cutoff sensor 1 of FIG. 1 is a tentative crimping, and the pressure cutoff sensor 1 is assembled into a storage battery as shown in FIG. it can.
【００２７】図３は上記の如く組み立てられた圧力遮断
センサ１をリチウムイオン２次電池やニッケル水素２次
電池などの蓄電池４０の内部に組み込んだ状態の概略構
成を示す説明図である。FIG. 3 is an explanatory view showing a schematic structure of the pressure cutoff sensor 1 assembled as described above, which is incorporated in a storage battery 40 such as a lithium ion secondary battery or a nickel hydrogen secondary battery.
【００２８】図３において、４１は上端部が開口されて
いる有底円筒体状の電池ケースであり、この電池ケース
４１は蓄電池４０の外部負極となり、その上端の開口縁
部がかしめ部４１ａとされている。４８は巻芯、４９は
巻芯４８に正極及び負極を巻回されて構成された発電
部、５０は発電部４９の負極と外部負極（電池ケース）
４１とを接続するリードである。この発電部４９は酸化
リチウムコバルトからなる正極、カーボンからなる負
極、正極と負極のショートを防止するセパレータが組み
込まれており、また、負極はセパレータを挟んで正極と
対向するように設けられている。さらに、この電池ケー
ス４１の内部は電解液（図示せず）で満たされている。In FIG. 3, reference numeral 41 denotes a bottomed cylindrical battery case having an open upper end. This battery case 41 serves as an external negative electrode of the storage battery 40, and an opening edge of the upper end thereof serves as a caulking portion 41a. Has been done. Reference numeral 48 is a winding core, 49 is a power generation unit configured by winding a positive electrode and a negative electrode around the winding core 48, and 50 is a negative electrode of the power generation unit 49 and an external negative electrode (battery case).
41 is a lead for connecting with 41. The power generation unit 49 incorporates a positive electrode made of lithium cobalt oxide, a negative electrode made of carbon, and a separator for preventing a short circuit between the positive electrode and the negative electrode, and the negative electrode is provided so as to face the positive electrode with the separator interposed therebetween. . Further, the inside of the battery case 41 is filled with an electrolytic solution (not shown).
【００２９】次に、圧力遮断センサ１を蓄電池４０に組
み込む方法について説明する。組込前、電池ケース４１
のかしめ部４１ａは図３の一点鎖線で示すように円筒形
状となっている。ここに図１に示す圧力遮断センサ１を
上方から電池ケース４１内に挿入する。この状態では、
前述したように、圧力遮断センサ１のガスケット２の円
筒部２ｂは仮かしめ状態である。そして、電池ケース４
１のかしめ部４１ａと共にガスケット２の円筒部２ｂを
内側にかしめて本かしめを行う。このようにして、図３
に実線で示すように、電池ケース４１のかしめ部４１ａ
とガスケット２の円筒部２ｂとを全周にわたってかしめ
ることによって、蓄電池４０に圧力遮断センサ１が確実
に組み込まれて密封される。Next, a method of incorporating the pressure cutoff sensor 1 into the storage battery 40 will be described. Before assembly, battery case 41
The caulking portion 41a has a cylindrical shape as shown by the alternate long and short dash line in FIG. The pressure cutoff sensor 1 shown in FIG. 1 is inserted into the battery case 41 from above. In this state,
As described above, the cylindrical portion 2b of the gasket 2 of the pressure cutoff sensor 1 is in the temporarily crimped state. And the battery case 4
The cylindrical portion 2b of the gasket 2 is crimped inside together with the crimping portion 41a of No. 1 to perform main crimping. In this way, FIG.
As shown by the solid line in FIG.
By caulking the cylindrical portion 2b of the gasket 2 over the entire circumference, the pressure cutoff sensor 1 is reliably incorporated into the storage battery 40 and sealed.
【００３０】次に、この第１の実施例を前記リチウムイ
オン２次電池に使用したとき、すなわち図３の使用状態
における動作について説明する。充電中、圧力遮断セン
サ１において電流は、外部電極（正極）１０から順次、
ＰＴＣ素子９、リード４ａ、遮断用エレメント７の遮断
用電路７ｂ、リード４ｂ、アクチュエータ５と流れ、リ
ード３に導出される。すなわち電流は、外部電極１０か
らＰＴＣ素子９、リード４ａへ流れ、このリード４ａに
接続された遮断用エレメント７の上面の遮断用電路７ｂ
を通り、この遮断用電路７ｂに接続されたリード４ｂに
導出され、更に、このリード４ｂからアクチュエータ
５、リード３に導出される。このとき、充電が完了して
も電流を流し続けて更に過充電が行われたり、規定され
た電流よりも大きな電流で充電が行われると、蓄電池４
０に異常が生じて蓄電池４０内の圧力や温度が上昇す
る。Next, the operation when the first embodiment is used in the lithium ion secondary battery, that is, in the use state of FIG. 3, will be described. During charging, the current in the pressure cutoff sensor 1 is sequentially supplied from the external electrode (positive electrode) 10.
The PTC element 9, the lead 4a, the breaking electric path 7b of the breaking element 7, the lead 4b, and the actuator 5 flow to the lead 3. That is, the current flows from the external electrode 10 to the PTC element 9 and the lead 4a, and the breaking electric circuit 7b on the upper surface of the breaking element 7 connected to the lead 4a.
Through the lead 4b connected to the breaking electric path 7b, and further led from the lead 4b to the actuator 5 and the lead 3. At this time, even if charging is completed, if current continues to flow and overcharging is further performed, or if charging is performed with a current larger than the specified current, the storage battery 4
0 occurs and the pressure and temperature inside the storage battery 40 rise.
【００３１】蓄電池４０内の圧力が上昇すると、外部圧
力として圧力遮断センサ１に伝わる。すると、図３に示
すように、この外部圧力がガスケット２の丸孔部２ｃを
通してアクチュエータ５の安全弁部５ｂを上方へ撓ませ
て変形させ、アクチュエータ５の安全弁部５ｂの中央の
遮断用エレメント破断用突部５ｄが遮断用エレメント７
のほぼ中央部を上方に押す。この遮断用エレメント７の
両端は遮断用エレメント保持体８の保持突起部８ｃ，８
ｃに支持されているので、更に蓄電池４０内の圧力が上
昇し、その圧力が一定の圧力に達したとき、遮断用エレ
メント７の基板７ａは、アクチュエータ５の遮断用エレ
メント破断用突部５ｄの圧力を受けて更に変形し、遮断
用エレメント７は遮断用エレメント保持体８の上板部８
ａ下の隙間へ押し込まれて割れる。この遮断用エレメン
ト７の割れにより、遮断用エレメント７の遮断用電路７
ｂが断線し、そのリード４ａ，４ｂとの間の導通が断た
れることによって、圧力遮断センサ１は外部電極１０と
発電部４９の正極間に流れる電流を遮断し、これ以上の
充電を止めさせると共に、このリチウムイオン２次電池
が蓄電池として機能できない状態にする。When the pressure in the storage battery 40 rises, it is transmitted to the pressure cutoff sensor 1 as an external pressure. Then, as shown in FIG. 3, this external pressure bends the safety valve portion 5b of the actuator 5 upward through the round hole portion 2c of the gasket 2 and deforms the safety valve portion 5b of the actuator 5 for breaking the shut-off element at the center. The protrusion 5d is the blocking element 7
Push the middle part of the upward. Both ends of the blocking element 7 are provided with holding projections 8c, 8 of the blocking element holder 8.
Since it is supported by c, when the pressure in the storage battery 40 further rises and reaches a certain pressure, the substrate 7a of the shut-off element 7 is fixed to the shut-off element breaking projection 5d of the actuator 5. It is further deformed by receiving pressure, and the blocking element 7 is the upper plate portion 8 of the blocking element holder 8.
It is pushed into the gap below and cracks. Due to the breakage of the breaking element 7, the breaking electric path 7 of the breaking element 7
When b is disconnected and the electrical connection between the leads 4a and 4b is cut off, the pressure cutoff sensor 1 cuts off the current flowing between the external electrode 10 and the positive electrode of the power generation section 49, and stops further charging. At the same time, this lithium-ion secondary battery is put into a state in which it cannot function as a storage battery.
【００３２】なお、更に、蓄電池４０内の圧力が上昇す
ると、アクチュエータ５の安全弁部５ｂの安全弁用凹部
５ｃが破れて、蓄電池４０内の気体は安全弁用凹部５ｃ
の破断部から圧力遮断センサ１内を通って外部電極１０
の安全弁用開口部１０ｃ，１０ｃ…から排出される。例
えば、圧力遮断センサ１の動作圧力を４〜１０気圧の範
囲で動作させ、また、安全弁作動圧力を１０〜２０気圧
の範囲で作動させている。Further, when the pressure in the storage battery 40 further rises, the safety valve recess 5c of the safety valve portion 5b of the actuator 5 is broken, and the gas in the storage battery 40 becomes the safety valve recess 5c.
The external electrode 10 through the pressure cut-off sensor 1
Are discharged from the safety valve openings 10c, 10c. For example, the operating pressure of the pressure cutoff sensor 1 is operated in the range of 4 to 10 atmospheres, and the safety valve operating pressure is operated in the range of 10 to 20 atmospheres.
【００３３】また、蓄電池４０内の温度が異常に高くな
ると、ＰＴＣ素子９の導通抵抗値が増大して電流値を低
下させる。When the temperature inside the storage battery 40 becomes abnormally high, the conduction resistance value of the PTC element 9 increases and the current value decreases.
【００３４】このように構成された第１の実施例にあっ
ては、電池ケース４１に固定されることで蓄電池４０の
内部を密閉し、蓄電池４０内部の圧力増加により外側に
変位する安全弁部５ｂ（感圧部）を有する導電性のアク
チュエータ５と、蓄電池４０の正極となる外部電極１０
と、電池ケース４１に固定したときアクチュエータ５よ
り外側に位置し、一端が外部電極１０に接続され他端が
アクチュエータ５に接続された導電路７ｂを有し、感圧
部（５ｂ）の変位により破断されて導電路７ｂを遮断さ
せられる遮断用エレメント７とを備えたため、安全性を
向上でき、また、内部の異常により引火性のガスが万一
発生したとしても、導電路７ｂの破断部分は蓄電池４０
の外側にあるので、遮断用エレメント７の破断の際アー
クが飛んでも引火する虞れがない。In the first embodiment thus constructed, the safety valve portion 5b is fixed to the battery case 41 to seal the inside of the storage battery 40 and is displaced outward due to an increase in pressure inside the storage battery 40. Conductive actuator 5 having (pressure sensitive portion) and external electrode 10 serving as a positive electrode of storage battery 40
And a conductive path 7b located outside the actuator 5 when fixed to the battery case 41, one end of which is connected to the external electrode 10 and the other end of which is connected to the actuator 5. Since the breaking element 7 that breaks and blocks the conductive path 7b is provided, safety can be improved, and even if an inflammable gas is generated due to an internal abnormality, the broken part of the conductive path 7b is Storage battery 40
Since it is on the outside, there is no fear of ignition even if the arc flies when the breaking element 7 breaks.
【００３５】また、第１の実施例にあっては、導電路７
ｂと外部電極１０との電路間にＰＴＣ素子９を有するた
め、異常な高温となったとき電流を低下させることがで
き、熱に対する安全性を向上させることができる。Further, in the first embodiment, the conductive path 7
Since the PTC element 9 is provided between the electric path between b and the external electrode 10, the current can be reduced when the temperature becomes abnormally high, and the safety against heat can be improved.
【００３６】また、第１の実施例にあっては、外部電極
１０は開口部１０ｃを有し、アクチュエータ５は安全弁
部５ｂ（安全弁）を有するため、非常時の防爆機構を兼
用して、機構の簡略化やコストダウンを図ることができ
る。Further, in the first embodiment, the external electrode 10 has the opening 10c and the actuator 5 has the safety valve portion 5b (safety valve). Therefore, the mechanism also functions as an explosion-proof mechanism in an emergency. Can be simplified and cost can be reduced.
【００３７】また、第１の実施例にあっては、感圧部と
安全弁の両方の機能を安全弁部５ｂに兼用させたため、
信頼性を一層向上させることができ、また、感圧部と安
全弁の両方の機能を兼用することで、遮断用エレメント
７が作動（破断）する圧力と、安全弁部５ｂが作動する
（安全弁用凹部５ｃが破れる）圧力とを同時に管理しや
すくなる。Further, in the first embodiment, since the safety valve portion 5b has the functions of both the pressure sensing portion and the safety valve,
The reliability can be further improved, and the pressure at which the shut-off element 7 is activated (broken) and the safety valve portion 5b are activated by combining the functions of both the pressure sensing portion and the safety valve (the safety valve recess). It becomes easier to manage the pressure and the pressure at which 5c breaks.
【００３８】また、第１の実施例にあっては、外部電極
１０に外側へ突出する膨出部１０ｂを設け、遮断用エレ
メント７をこの膨出部１０ｂに収納させたため、省スペ
ース化が図れ、蓄電池４０全体として容量を高めること
ができる。Further, in the first embodiment, the external electrode 10 is provided with the bulging portion 10b projecting outward, and the blocking element 7 is housed in the bulging portion 10b, so that the space can be saved. The capacity of the storage battery 40 as a whole can be increased.
【００３９】図４は本発明の第２の実施例に係る圧力遮
断センサを示す平面図、図５は該圧力遮断センサの縦断
面図、図６は該圧力遮断センサの底面図、図７は該圧力
遮断センサの分解斜視図、図８は図４のＡ−Ａ線に沿う
横断面図、図９は図４のＢ−Ｂ線に沿う横断面図、図１
０は図４のＣ−Ｃ線に沿う横断面図である。FIG. 4 is a plan view showing a pressure cutoff sensor according to a second embodiment of the present invention, FIG. 5 is a vertical sectional view of the pressure cutoff sensor, FIG. 6 is a bottom view of the pressure cutoff sensor, and FIG. 1 is an exploded perspective view of the pressure cutoff sensor, FIG. 8 is a cross-sectional view taken along the line AA of FIG. 4, and FIG. 9 is a cross-sectional view taken along the line BB of FIG.
0 is a cross-sectional view taken along the line CC of FIG.
【００４０】図４〜図１０において、２１は圧力遮断セ
ンサであり、この圧力遮断センサ２１は全体の形状が略
矩形をしており、アクチュエータ２２と、遮断用エレメ
ント２３と、リード２４と、支持体２５と、パッキング
２６と、蓋体２７と、保持ケース２８および外部電極２
９とから主に構成されている。4 to 10, reference numeral 21 denotes a pressure cutoff sensor, and the pressure cutoff sensor 21 has a substantially rectangular overall shape, and has an actuator 22, a cutoff element 23, a lead 24, and a support. Body 25, packing 26, lid 27, holding case 28 and external electrode 2
It is mainly composed of 9.
【００４１】アクチュエータ２２は、第１の実施例にお
けるアクチュエータ５と同様に導電性のアルミニウム材
からなり、全体として略長方形に形成されている。アク
チュエータ２２は、その外周縁に形成された突条２２ａ
と、平板状のフランジ部２２ｂと、このフランジ部２２
ｂの中央部に略楕円形に肉薄部により形成された環状凹
部２２ｃと、この環状凹部２２ｃ内の安全弁部２２ｄ
と、この安全弁部２２ｄの中央に突設された遮断用エレ
メント２３を破断するための破断用突起２２ｅとから構
成されている。安全弁部２２ｄの外周部分（図７の破線
で囲まれた領域）は部分的に熱処理して硬度を軟化させ
てあり、それによってダイアフラム特性を良好にしてい
る。熱処理の方法としては、安全弁部２２ｄの軟化すべ
き部分に直に熱を加えたり、当該部分に超音波を当てた
り、抵抗によるジュール熱を当てればよく、その熱処理
温度は２００〜５００°Ｃで３〜１０秒である。The actuator 22 is made of a conductive aluminum material like the actuator 5 in the first embodiment, and is formed in a substantially rectangular shape as a whole. The actuator 22 has a ridge 22a formed on its outer peripheral edge.
And a flat plate-shaped flange portion 22b, and this flange portion 22
An annular recess 22c formed by a thin portion having a substantially elliptical shape in the center of b, and a safety valve portion 22d in the annular recess 22c.
And a breaking projection 22e for breaking the shut-off element 23 protruding from the center of the safety valve portion 22d. The outer peripheral portion of the safety valve portion 22d (the area surrounded by the broken line in FIG. 7) is partially heat-treated to soften its hardness, thereby improving the diaphragm characteristics. As a heat treatment method, heat may be directly applied to the portion of the safety valve portion 22d to be softened, ultrasonic waves may be applied to the portion, or Joule heat due to resistance may be applied, and the heat treatment temperature is 200 to 500 ° C. 3 to 10 seconds.
【００４２】遮断用エレメント２３は略帯状をしてお
り、第１の実施例における遮断用エレメント７と同様
に、絶縁性のセラミック又は樹脂製の基板２３ａと、こ
の基板２３ａの上面側に印刷成形された遮断用電路２３
ｂとから構成されている。遮断用電路２３ｂの長手方向
の両端にはリード２４ａ，２４ｂがそれぞれ接続されて
いる。The shut-off element 23 has a substantially strip shape, and like the shut-off element 7 in the first embodiment, a substrate 23a made of an insulating ceramic or resin and a print molding on the upper surface side of the substrate 23a. Cut-off circuit 23
b and. Leads 24a and 24b are respectively connected to both ends of the breaking electric circuit 23b in the longitudinal direction.
【００４３】支持体２５は導電性のアルミニウム材から
なり、中央に略長方形の開口２５ａが穿設された支持面
部２５ｂと、開口２５ａの外周部を囲むようにして上方
に一体的に立ち上げることにより形成された上部突条２
５ｃと、支持面部２５ｂの外周部を囲むようにして下方
に一体的に立ち下げることにより形成された下部突条２
５ｄと、略コの字状をした端子部２５ｅとから構成され
ている。上部突条２５ｃには、その長手方向の辺にそれ
ぞれ２つ、短手方向の辺にそれぞれ１つの突起２５ｆが
形成されている。一方、下部突条２５ｄにも同様に、長
手方向の辺にそれぞれ２つ、短手方向の辺にそれぞれ１
つのかしめ用突起２５ｇが形成されている。端子部２５
ｅのコ字状の両端部には切欠き部２５ｈがそれぞれ形成
され、これら切欠き部２５ｈによりかしめ用突起２５ｇ
を避けるようにして、端子部２５ｅは下部突条２５ｄの
長手方向の両端部に繋がれている。図５と図７および図
８に示すように、この端子部２５ｅは最終的には略直角
に折り曲げられる。また、開口２５ａの長手方向の一端
部にはリード接続部２５ｉが架設されており、このリー
ド接続部２５ｉには一方のリード２４ｂが接続される。The support 25 is made of a conductive aluminum material, and is formed by integrally raising a support surface portion 25b having a substantially rectangular opening 25a in the center and an outer peripheral portion of the opening 25a. Upper ridge 2
5c and the lower protrusion 2 formed by integrally lowering downward so as to surround the outer peripheral portion of the support surface portion 25b.
5d and a terminal portion 25e having a substantially U shape. The upper protrusion 25c is provided with two protrusions 25f on the longitudinal side and one protrusion 25f on the lateral side. On the other hand, similarly, for the lower protrusion 25d, two are provided on each of the longitudinal sides and one is provided on each of the lateral sides.
Two caulking projections 25g are formed. Terminal part 25
Notches 25h are formed at both ends of the U-shape of "e", and the notches 25h cause the caulking projection 25g.
The terminal portion 25e is connected to both ends of the lower protrusion 25d in the longitudinal direction so as to avoid. As shown in FIGS. 5, 7 and 8, the terminal portion 25e is finally bent at a substantially right angle. In addition, a lead connecting portion 25i is provided at one end in the longitudinal direction of the opening 25a, and one lead 24b is connected to the lead connecting portion 25i.
【００４４】パッキング２６は絶縁性と弾性を備えたエ
チレンプロピレン共重合体（ＥＰＤＭ）のような合成樹
脂やゴム材で作られており、支持体２５と蓋体２７との
間をシールする上部パッキング部２６ａと、支持体２５
とアクチュエータ２２との間をシールする下部パッキン
グ部２６ｂとから構成されている。上部パッキング部２
６ａは、端子部２５ｅの両端部を略覆う大きさの長方形
をした平板部２６ｃと、この平板部２６ｃの略中央部に
穿設された支持体２５の上部突条２５ｃを挿通するため
の開口２６ｄと、この開口２６ｄの外周部を囲むように
して上方に一体的に立ち上げることにより形成された上
部突起２６ｅとを有している。下部パッキング部２６ｂ
は、間隔をおいて位置する３つの連接部２６ｆを介して
上部パッキング部２６ａに一体的に接続されており、そ
の外形は下部突条２５ｄ内に嵌め込まれる大きさをして
おり、中央部には矩形の開口２６ｇが穿設されている。
この開口２６ｇの短手方向の両辺には遮断用エレメント
２３の両端部を押えるための押え用突起２６ｈが設けら
れている。下部パッキング部２６ｂの下面には、遮断用
エレメント２３とリード２４ａ，２４ｂとの接続部を押
える押え用突起２６ｉが突設されている。The packing 26 is made of synthetic resin such as ethylene propylene copolymer (EPDM) or rubber material having insulation and elasticity, and is an upper packing that seals between the support 25 and the lid 27. Part 26a and support 25
And a lower packing portion 26b that seals between the actuator 22 and the actuator 22. Upper packing part 2
6a is an opening for inserting a rectangular flat plate portion 26c having a size substantially covering both end portions of the terminal portion 25e, and an upper protrusion 25c of the support body 25 formed at a substantially central portion of the flat plate portion 26c. 26d and an upper protrusion 26e formed by integrally rising upward so as to surround the outer peripheral portion of the opening 26d. Lower packing part 26b
Is integrally connected to the upper packing portion 26a through three connecting portions 26f that are spaced apart, and the outer shape thereof is sized to fit into the lower protrusion 25d, and the central portion is Has a rectangular opening 26g.
Pressing projections 26h for pressing both ends of the blocking element 23 are provided on both sides of the opening 26g in the lateral direction. On the lower surface of the lower packing part 26b, a pressing projection 26i for pressing the connection part between the breaking element 23 and the leads 24a, 24b is provided in a protruding manner.
【００４５】蓋体２７はステンレス材のような導電性金
属板で形成され、パッキング２６の上部パッキング部２
６ａ上を覆う程度の大きさをしており、その略中央部に
は上部突起２６ｅが挿通される開口２７ａが穿設され、
外周部には上方に突出する環状の突条２７ｂが形成され
ている。The lid 27 is formed of a conductive metal plate such as a stainless material, and the upper packing portion 2 of the packing 26.
6a has a size enough to cover the top of the 6a, and an opening 27a through which the upper protrusion 26e is inserted is formed at a substantially central portion thereof.
An annular protrusion 27b is formed on the outer peripheral portion so as to protrude upward.
【００４６】保持ケース２８はポリアセタール等の絶縁
性樹脂で成形され、蓋体２７の突条２７ｂ内に嵌合され
る大きさになっている。保持ケース２８の下面の略中央
部には、蓋体２７の開口２７ａから支持体２５の開口２
５ａ内に突出するように挿入される一対の脚部２８ａが
垂下されている。これら一対の脚部２８ａの上方の保持
ケース２８には、外部電極２９を保持する台座部２８ｂ
が一体的に形成されている。保持ケース２８にはまた、
後述する外部電極２９の接続部２９ｂが挿通される開口
２８ｃと、同じく外部電極２９のかしめ用爪２９ｃおよ
び支持体２５の６つの突起２５ｆがそれぞれ挿入される
スリット２８ｄが穿設されている。The holding case 28 is made of an insulating resin such as polyacetal, and is sized to fit in the protrusion 27b of the lid 27. From the opening 27 a of the lid 27 to the opening 2 of the support body 25, in the substantially central portion of the lower surface of the holding case 28.
A pair of leg portions 28a are inserted so as to project into the 5a. The holding case 28 above the pair of legs 28a has a pedestal portion 28b holding an external electrode 29.
Are integrally formed. The holding case 28 also has
An opening 28c into which a connecting portion 29b of an external electrode 29, which will be described later, is inserted, and a slit 28d into which the caulking claw 29c of the external electrode 29 and the six protrusions 25f of the support body 25 are respectively inserted are provided.
【００４７】外部電極２９は、第１の実施例における外
部電極１０と同様に、この圧力遮断センサ２１を蓄電池
４０に組み込んだとき（図５参照）蓄電池４０の正極と
なるもので、ニッケルやステンレス材で作られている。
外部電極２９は、略矩形の本体部２９ａと、この本体部
２９ａの一側縁から階段状の折り曲げられた接続部２９
ｂと、この接続部２９ｂが延在する端縁とこの端縁に相
対する端縁に垂下するように形成された一対のかしめ用
爪２９ｃとを有している。Like the external electrode 10 in the first embodiment, the external electrode 29 serves as a positive electrode of the storage battery 40 when the pressure cutoff sensor 21 is incorporated in the storage battery 40 (see FIG. 5), and is made of nickel or stainless steel. Made of wood.
The external electrode 29 includes a substantially rectangular main body portion 29a and a connecting portion 29 that is bent stepwise from one side edge of the main body portion 29a.
b, an end edge from which the connecting portion 29b extends, and a pair of caulking claws 29c formed so as to hang down from the end edge opposite to the end edge.
【００４８】この第２の実施例による圧力遮断センサ２
１は、まず、支持体２５内にリード２４ａ，２４ｂを接
続した遮断用エレメント２３を配置し、次にパッキング
２６をその上部パッキング部２６ａで支持体２５の平板
部２６ｃを覆うように載置する。そして、パッキング２
６の下部パッキング部２６ｂを連接部２６ｆの部分から
下方に折り曲げるようにして、支持体２５の下方に下部
パッキング部２６ｂを位置させる。この時、各連接部２
６ｆ間の間隙に支持体２５のかしめ用突起２５ｇを通す
ようにすれば、連接部２６ｆから小さく折り畳むことが
できる。次に、アクチュエータ２２を下部パッキング部
２６ｂにあてがうように位置させた後、かしめ用突起２
５ｇをかしめて、アクチュエータ２２の外周縁を下部パ
ッキング部２６に圧着固定する。Pressure cutoff sensor 2 according to the second embodiment
In the first example, first, the blocking element 23 to which the leads 24a and 24b are connected is arranged in the support 25, and then the packing 26 is placed so that the upper packing portion 26a covers the flat plate portion 26c of the support 25. . And packing 2
The lower packing portion 26b of No. 6 is bent downward from the connecting portion 26f, and the lower packing portion 26b is positioned below the support 25. At this time, each connecting part 2
If the caulking projection 25g of the support 25 is passed through the gap between the 6f, it can be folded small from the connecting portion 26f. Next, after the actuator 22 is positioned so as to be applied to the lower packing portion 26b, the caulking protrusion 2
By caulking 5 g, the outer peripheral edge of the actuator 22 is pressure-bonded to the lower packing portion 26.
【００４９】一方、保持ケース２８の台座部２８ｂに外
部電極２９を保持させ、外部電極２９の接続部２９ｂを
保持ケース２８の開口２８ｃに、かしめ用爪２９ｃをス
リット２８ｄにそれぞれ挿入しておく。これにより、外
部電極２９の接続部２９ｂはリード２４ａに接続させる
ことができる。そして、パッキング２６の上部パッキン
グ部２６ａ上に蓋体２７を載置した後、外部電極２９が
取付けられた保持ケース２８を蓋体２７の突条２７ｂ内
に嵌合する。蓋体２７と保持ケース２８の固定は、支持
体２５の突起２５ｆを保持ケース２８のスリット２８ｄ
に挿入した後かしめることにより行われる。On the other hand, the pedestal portion 28b of the holding case 28 holds the external electrode 29, the connecting portion 29b of the external electrode 29 is inserted into the opening 28c of the holding case 28, and the caulking claw 29c is inserted into the slit 28d. As a result, the connecting portion 29b of the external electrode 29 can be connected to the lead 24a. Then, after placing the lid 27 on the upper packing portion 26a of the packing 26, the holding case 28 to which the external electrode 29 is attached is fitted into the protrusion 27b of the lid 27. The lid 27 and the holding case 28 are fixed by fixing the protrusion 25f of the support 25 to the slit 28d of the holding case 28.
It is done by caulking after inserting into.
【００５０】このようにして組み立てられた圧力遮断セ
ンサ２１は、第１の実施例と同様に、リチウムイオン２
次電池やニッケル水素２次電池などの蓄電池４０の内部
に組み込まれて使用される。その際、図５に示すよう
に、圧力遮断センサ２１は蓋体２７の外周縁が電池ケー
ス４１の上部開口端にかしめられることにより蓄電池４
０に組み込まれ、蓋体２７と電池ケース４１が蓄電池４
０の外部負極となる。The pressure cutoff sensor 21 assembled in this way is similar to the first embodiment in that the lithium ion 2
It is used by being incorporated into a storage battery 40 such as a secondary battery or a nickel hydrogen secondary battery. At that time, as shown in FIG. 5, in the pressure cutoff sensor 21, the outer peripheral edge of the lid 27 is caulked to the upper open end of the battery case 41, so that the storage battery 4 is discharged.
0 is installed, the lid 27 and the battery case 41 are
It is an external negative electrode of 0.
【００５１】次に、この第２の実施例を前記リチウムイ
オン２次電池に使用したときの動作について説明する
と、充電中、圧力遮断センサ２１において電流は、外部
電極（正極）２９から順次、リード２４ａ、遮断用エレ
メント２３の遮断用電路２３ｂ、リード２４ｂそして支
持体２５に流れ、端子部２５ｅに導出される。この圧力
遮断センサ２１を取付けた蓄電池４０に過充電が行われ
たり、異常が発生して、蓄電池４０内の圧力や温度が上
昇した場合は、アクチュエータ２２の安全弁部２２ｄが
上方に撓み、破断用突起２２ｅが遮断用エレメント２３
を破断し、遮断用電路２３ｂを断線させてリード２４
ａ，２４ｂ間の導通を断つ。また、更に圧力が上昇した
場合には、第１の実施例と同様に、アクチュエータ２２
の安全弁部２２ｄが破れてこの圧力遮断センサ２１内を
通って外部電極１０の安全弁用開口部１０ｃ，１０ｃ…
から排出される。Next, the operation when the second embodiment is used in the lithium ion secondary battery will be described. During charging, the current in the pressure cutoff sensor 21 is sequentially read from the external electrode (positive electrode) 29. 24a, the breaking electric circuit 23b of the breaking element 23, the lead 24b and the support 25, and is led to the terminal portion 25e. When the storage battery 40 to which the pressure cutoff sensor 21 is attached is overcharged or an abnormality occurs and the pressure or temperature in the storage battery 40 rises, the safety valve portion 22d of the actuator 22 bends upward and is broken. The projection 22e is a blocking element 23
To break the disconnecting electric circuit 23b to disconnect the lead 24
The connection between a and 24b is cut off. Further, when the pressure further rises, the actuator 22 is driven as in the first embodiment.
The safety valve portion 22d of the external electrode 10 is ruptured and passes through the pressure cutoff sensor 21, and the safety valve openings 10c, 10c ...
Emitted from.
【００５２】このように構成された第２の実施例にあっ
ては、アクチュエータ２２は単に蓄電池４０内の圧力を
感知する機能だけでよく、導電路を形成する必要がない
ため、構造を簡略化することができ、金属以外の材料を
用いることも可能となる。また、パッキング２６によ
り、アクチュエータ２２と支持体２５間および支持体２
５と蓋体２７との間が確実に絶縁されるとともに、内部
を気密に保持することができる。しかも、この２つの間
に介在するパッキング２６は、連接部２６ｆから折り曲
げることにより位置させているため、１つのパッキング
で済み、部品点数を削減することができる。In the second embodiment constructed as described above, the actuator 22 has only the function of sensing the pressure in the storage battery 40, and it is not necessary to form a conductive path. Therefore, the structure is simplified. It is also possible to use a material other than metal. In addition, by packing 26, the space between the actuator 22 and the support 25 and the support 2
5 and the lid 27 are reliably insulated, and the inside can be kept airtight. Moreover, since the packing 26 interposed between the two is positioned by bending from the connecting portion 26f, only one packing is required, and the number of parts can be reduced.
【００５３】また、第２の実施例にあっては、アクチュ
エータ２２の安全弁部２２ｄが部分的な熱処理により軟
化されているため、環状凹部２２ｃから安全弁部２２ｄ
の外周部にかけての部位を確実に変位させることができ
るが、それ以外の突条２２ａやフランジ部２２ｂあるい
は破断用突起２２ｅには遮断用エレメント２３を破断す
るのに充分な強度を確保することができ、良好なダイア
フラム特性と充分な強度という相反する特性を同時に満
足させることができる。Further, in the second embodiment, since the safety valve portion 22d of the actuator 22 is softened by the partial heat treatment, the safety valve portion 22d extends from the annular recess 22c.
It is possible to surely displace the portion up to the outer peripheral portion of the, but it is possible to secure sufficient strength for breaking the blocking element 23 in the other protrusions 22a, the flange portion 22b or the breaking projection 22e. Therefore, it is possible to satisfy the contradictory characteristics of good diaphragm characteristics and sufficient strength at the same time.
【００５４】なお、上記第２の実施例では、保持ケース
２８を蓋体２７の外側に配置したが、この保持ケース２
８を支持体２５の下面に配置し、外部電極２９を支持体
２５とパッキング２６および蓋体２７の各開口２５ａ，
２６ｄ，２７ａから外部に突出させても良い。また、必
要に応じて、外部電極２９と遮断用エレメント２３間に
ＰＴＣ素子を配設することも可能である。Although the holding case 28 is arranged outside the lid 27 in the second embodiment, this holding case 2
8 is disposed on the lower surface of the support 25, and the external electrodes 29 are provided on the support 25, the packing 26, and the openings 25a of the lid 27,
You may make it project outside from 26d and 27a. In addition, a PTC element can be arranged between the external electrode 29 and the blocking element 23, if necessary.
【００５５】[0055]
【発明の効果】本発明は、以上説明したような形態で実
施され、以下に記載されるような効果を奏する。The present invention is carried out in the form as described above, and has the following effects.
【００５６】電池の一方の電極となる外部電極と、電池
ケース内に絶縁体を介して密閉状態で固定され、電池内
部の圧力増加により外側に変位する感圧部を有する導電
性の作動部材と、前記電池ケースに固定したとき前記作
動部材より外側に位置し、一端が前記外部電極に接続さ
れ、他端が前記作動部材に接続された導電路を有し、前
記感圧部の変位により破断されて前記導電路を遮断する
破断部材とを備えることにより、破断部材の破断時に万
一アークが飛んだとしても、蓄電池内部のガスにアーク
が引火する虞れがなくなるため、安全性の高い圧力遮断
センサを提供することができる。An external electrode which is one of the electrodes of the battery, and a conductive actuating member having a pressure sensitive portion which is fixed in the battery case in a hermetically sealed state via an insulator and is displaced outward due to an increase in pressure inside the battery. , Located outside the actuation member when fixed to the battery case, has a conductive path having one end connected to the external electrode and the other end connected to the actuation member, and broken by displacement of the pressure-sensitive portion By providing the breaking member for breaking the conductive path, even if the arc should fly at the time of breaking the breaking member, the gas inside the storage battery will not be ignited by the arc, so that the safety is high. An interruption sensor can be provided.
【００５７】また、電池の一方の電極となる外部電極
と、電池ケース内に密閉状態で固定され、電池内部の圧
力増加により外側に変位する感圧部を有する作動部材
と、前記電池ケースに固定したとき前記作動部材より外
側に位置し、電池内部への電路を有する導電性の支持体
と、前記外部電極を保持する絶縁性の保持部材と、前記
外部電極と前記支持体間を接続する導電路を有し、前記
感圧部の変位により破断されて前記導電路を遮断する破
断部材とを備えることにより、作動部材は変位により破
断部材を破断するだけの機能を持てば良く、必ずしも導
電性は必要でないため、作動部材の形状や材質の自由度
が広がり、構造も簡単になる。Further, an external electrode which is one of the electrodes of the battery, an operating member which is fixed in a hermetically sealed state inside the battery case and has a pressure sensitive portion which is displaced outward due to an increase in pressure inside the battery, and fixed to the battery case. Then, a conductive support located outside the operating member and having an electric path to the inside of the battery, an insulating holding member for holding the external electrode, and a conductive connection between the external electrode and the support. By having a breaking member that has a path and is broken by the displacement of the pressure-sensitive portion and interrupts the conductive path, the actuating member has only the function of breaking the breaking member by displacement, and is not necessarily conductive. Is not necessary, the degree of freedom of the shape and material of the operating member is increased, and the structure is simplified.
【００５８】また、前記導電路と外部電極との電路間に
ＰＴＣ素子を配設すると、異常な高温となったとき電流
を低下させることができ、熱に対する安全性も高められ
る。Further, by disposing the PTC element between the electric path between the conductive path and the external electrode, the current can be reduced when the temperature becomes abnormally high, and the safety against heat can be improved.
【００５９】また、前記外部電極に開口部を設けると共
に、前記作動部材に感圧部と安全弁とを設けると、非常
時の防爆機構を兼用して、機構の簡略化やコストダウン
を図ることができ、特に、前記安全弁が感圧部を兼用す
るようにすると、破断部材が作動する圧力と安全弁が作
動する圧力を同時に管理しやすくなる。If an opening is provided in the external electrode and a pressure sensitive portion and a safety valve are provided in the actuating member, the mechanism can be simplified and the cost can be reduced by using the explosion-proof mechanism in an emergency. In particular, if the safety valve also serves as the pressure sensitive portion, it becomes easy to simultaneously manage the pressure at which the breaking member operates and the pressure at which the safety valve operates.
【００６０】また、前記外部電極に外側へ突出する突部
を設け、前記破断部材を該突部に収納させると、省スペ
ース化が図れ、蓄電池全体としての容量を高めることが
できる。If the external electrode is provided with a protrusion projecting outward and the breaking member is housed in the protrusion, space can be saved and the capacity of the storage battery as a whole can be increased.
【００６１】また、前記作動部材に熱処理で軟化された
部分を形成し、この軟化部分に囲まれた部位を前記感圧
部とすると、内部の圧力変化に迅速に応答して変位する
作動部材を実現できる。If a portion softened by heat treatment is formed on the actuating member and the portion surrounded by the softened portion is used as the pressure sensitive portion, an actuating member that displaces in response to a change in internal pressure quickly is provided. realizable.
【００６２】また、前記電池ケースが電池の他方の電極
で、前記破断部材の導電路が前記外部電極と前記支持体
間を接続する場合、前記電極ケースの開口端に導電性の
蓋体を固着し、これら蓋体と支持体間に位置し両者間を
密閉する第１のパッキングを配設すると、極性が相反す
る外部電極と蓋体間の絶縁を確保できると共に、蓄電池
内部を気密に保持することができる。When the battery case is the other electrode of the battery and the conductive path of the breaking member connects between the external electrode and the support, a conductive lid is fixed to the open end of the electrode case. If a first packing is provided between the lid and the support and seals the two, the insulation between the external electrode and the lid, which have opposite polarities, can be secured, and the inside of the storage battery is kept airtight. be able to.
【００６３】また、前記支持体と前記作動部材間に位置
しこれら両者間を密閉する第２のパッキングを配設する
と、前記作動部材を導電性材料で形成することができる
と共に、蓄電池内部を気密に保持することができ、特
に、前記第１および第２のパッキングを一体化し、第２
のパッキングを折り返しにより支持体と作動部材間に位
置させると、組立作業性が向上する。Further, by disposing a second packing located between the support and the actuating member and hermetically sealing them, the actuating member can be made of a conductive material and the inside of the storage battery is airtight. In particular, the first and second packings can be integrated into a second
When the packing of (1) is folded back and positioned between the support and the operating member, the assembling workability is improved.
【図１】本発明の第１の実施例に係る圧力遮断センサの
縦断面図である。FIG. 1 is a vertical sectional view of a pressure cutoff sensor according to a first embodiment of the present invention.
【図２】該圧力遮断センサの分解斜視図である。FIG. 2 is an exploded perspective view of the pressure cutoff sensor.
【図３】該圧力遮断センサをリチウムイオン２次電池に
使用した状態の概略構成を示す説明図である。FIG. 3 is an explanatory diagram showing a schematic configuration in a state in which the pressure cutoff sensor is used in a lithium ion secondary battery.
【図４】本発明の第２の実施例に係る圧力遮断センサの
平面図である。FIG. 4 is a plan view of a pressure cutoff sensor according to a second embodiment of the present invention.
【図５】該圧力遮断センサの縦断面図である。FIG. 5 is a vertical sectional view of the pressure cutoff sensor.
【図６】該圧力遮断センサの底面図である。FIG. 6 is a bottom view of the pressure cutoff sensor.
【図７】該圧力遮断センサの分解斜視図である。FIG. 7 is an exploded perspective view of the pressure cutoff sensor.
【図８】図４のＡ−Ａ線に沿う横断面図である。8 is a cross-sectional view taken along the line AA of FIG.
【図９】図４のＢ−Ｂ線に沿う横断面図である。9 is a cross-sectional view taken along the line BB of FIG.
【図１０】図４のＣ−Ｃ線に沿う横断面図である。10 is a cross-sectional view taken along the line CC of FIG.
【図１１】従来の圧力遮断センサの概略構成を示す説明
図である。FIG. 11 is an explanatory diagram showing a schematic configuration of a conventional pressure cutoff sensor.
１，２１ 圧力遮断センサ ５，２２ アクチュエータ ５ｂ，２２ｄ 安全弁部 ５ｃ 安全弁用凹部 ７，２３ 遮断用エレメント ７ｂ，２３ｂ 遮断用電路 ９ ＰＴＣ素子 １０，２９ 外部電極 １０ｂ 膨出部 １０ｃ 開口部 ２４ リード ２５ 支持体 ２６ パッキング ２６ａ 上部パッキング部 ２６ｂ 下部パッキング部 ２７ 蓋体 ２７ａ 開口 ２８ 保持ケース ４０ 蓄電池 ４１ 電池ケース 1,21 Pressure cutoff sensor 5,22 actuator 5b, 22d Safety valve section 5c Safety valve recess 7,23 Blocking element 7b, 23b Breaking circuit 9 PTC element 10, 29 External electrode 10b bulge 10c opening 24 leads 25 support 26 packing 26a Upper packing part 26b Lower packing part 27 Lid 27a opening 28 holding case 40 storage battery 41 battery case
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 2/34 H01M 10/42 - 10/48 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) H01M 2/34 H01M 10/42-10/48
Claims (10)
池内部の圧力増加により外側に変位する感圧部を有する
導電性の作動部材と、 前記電池ケースに固定したとき前記作動部材より外側に
位置し、一端が前記外部電極に接続され、他端が前記作
動部材に接続された導電路を有し、前記感圧部の変位に
より破断されて前記導電路を遮断する破断部材と、を備
えたことを特徴とする圧力遮断センサ。1. An electrically conductive operation having an external electrode which is one of electrodes of a battery and a pressure-sensitive portion which is fixed in a battery case in a hermetically sealed state via an insulator and is displaced outward due to an increase in pressure inside the battery. A member and a conductive path located outside the actuation member when fixed to the battery case, having one end connected to the external electrode and the other end connected to the actuation member; And a breaking member that breaks the conductive path to break the conductive path.
加により外側に変位する感圧部を有する作動部材と、 前記電池ケースに固定したとき前記作動部材より外側に
位置し、電池内部への電路を有する導電性の支持体と、 前記外部電極を保持する絶縁性の保持部材と、 前記外部電極と前記支持体間を接続する導電路を有し、
前記感圧部の変位により破断されて前記導電路を遮断す
る破断部材と、を備えたことを特徴とする圧力遮断セン
サ。2. An external electrode which is one of electrodes of a battery, an operating member which is fixed in a sealed state in the battery case, and has a pressure sensitive portion which is displaced outward due to an increase in pressure inside the battery, and fixed to the battery case. When located at a position outside the actuating member, a conductive support having an electric path to the inside of the battery, an insulating holding member for holding the external electrode, and a conductive connection between the external electrode and the support. Have a road,
And a breaking member that breaks due to displacement of the pressure-sensitive portion and breaks the conductive path.
導電路と前記外部電極との電路間にＰＴＣ素子を配設し
たことを特徴とする圧力遮断センサ。3. The pressure cutoff sensor according to claim 1 or 2, wherein a PTC element is provided between the conductive path and the external electrode.
いて、前記外部電極は開口部を有し、前記作動部材は安
全弁を有することを特徴とする圧力遮断センサ。4. The pressure cutoff sensor according to claim 1, wherein the external electrode has an opening, and the operating member has a safety valve.
前記作動部材の感圧部を兼用することを特徴とする圧力
遮断センサ。5. The pressure cutoff sensor according to claim 4, wherein the safety valve also serves as a pressure sensitive portion of the operating member.
いて、前記外部電極は外側へ突出する突部を有し、前記
破断部材を該突部に収納させたことを特徴とする圧力遮
断センサ。6. The pressure cutoff sensor according to claim 1, wherein the external electrode has a protrusion protruding outward, and the breaking member is housed in the protrusion. .
作動部材に熱処理で軟化された部分を形成し、この軟化
部分に囲まれた部位を前記感圧部としたことを特徴とす
る圧力遮断センサ。7. The pressure cutoff according to claim 1, wherein a portion softened by heat treatment is formed on the actuating member, and a portion surrounded by the softened portion serves as the pressure sensitive portion. Sensor.
スは電池の他方の電極であり、該電池ケースの開口端に
固着され、前記外部電極が突出する開口を有する導電性
の蓋体と、前記蓋体と前記支持体間に位置しこれら両者
間を密閉する第１のパッキングとを備えたことを特徴と
する圧力遮断センサ。8. The conductive lid body according to claim 2, wherein the battery case is the other electrode of the battery, and is fixed to an open end of the battery case and has an opening through which the external electrode projects. A pressure cutoff sensor comprising: a first packing which is located between the lid and the support and seals between the two.
が導電性材料からなり、前記支持体と前記作動部材間に
位置しこれら両者間を密閉する第２のパッキングとを備
えたことを特徴とする圧力遮断センサ。9. The operating member according to claim 8, wherein the actuating member is made of a conductive material, and is provided with a second packing that is located between the support and the actuating member and seals between the two. Pressure cutoff sensor.
よび第２のパッキングは一体であり、前記第２のパッキ
ングを折り返しにより前記支持体と前記作動部材間に位
置させることを特徴とする圧力遮断センサ。10. The pressure according to claim 9, wherein the first packing and the second packing are integrated, and the second packing is folded back to be positioned between the support and the actuating member. Cutoff sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07427496A JP3426840B2 (en) | 1995-07-31 | 1996-03-28 | Pressure cutoff sensor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19488895 | 1995-07-31 | ||
| JP7-194888 | 1995-07-31 | ||
| JP07427496A JP3426840B2 (en) | 1995-07-31 | 1996-03-28 | Pressure cutoff sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09102330A JPH09102330A (en) | 1997-04-15 |
| JP3426840B2 true JP3426840B2 (en) | 2003-07-14 |
Family
ID=26415419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07427496A Expired - Fee Related JP3426840B2 (en) | 1995-07-31 | 1996-03-28 | Pressure cutoff sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3426840B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3649928B2 (en) * | 1999-02-01 | 2005-05-18 | ホシデン株式会社 | Pressure crushing protection device and explosion-proof capacitor using the same |
| US7943251B2 (en) | 2004-10-28 | 2011-05-17 | Samsung Sdi Co., Ltd. | Rechargeable battery having safety vent |
| JP5535969B2 (en) * | 2011-03-09 | 2014-07-02 | 三菱重工業株式会社 | Secondary battery |
| JP5609905B2 (en) * | 2012-03-06 | 2014-10-22 | 株式会社豊田自動織機 | Power storage device, secondary battery and vehicle |
| JP6019248B2 (en) | 2013-10-16 | 2016-11-02 | 株式会社豊田自動織機 | Current interrupt device and power storage device using the same |
| JP6620408B2 (en) * | 2015-03-06 | 2019-12-18 | 株式会社Ｇｓユアサ | Electricity storage element |
| JP6620407B2 (en) * | 2015-03-06 | 2019-12-18 | 株式会社Ｇｓユアサ | Electricity storage element |
| DE202019106891U1 (en) * | 2019-12-11 | 2020-12-16 | Hugo Benzing Gmbh & Co. Kg | Pressure relief device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3203623B2 (en) * | 1992-03-06 | 2001-08-27 | ソニー株式会社 | Organic electrolyte battery |
| JPH0696803A (en) * | 1992-09-11 | 1994-04-08 | Hitachi Maxell Ltd | Explosion-proof sealed battery |
| JP2970340B2 (en) * | 1992-09-29 | 1999-11-02 | 松下電器産業株式会社 | Explosion-proof sealing plate for sealed batteries |
| JPH06176753A (en) * | 1992-12-01 | 1994-06-24 | Haibaru:Kk | Secondary battery |
| JPH07105933A (en) * | 1993-10-06 | 1995-04-21 | Hitachi Maxell Ltd | Anti-explosive enclosed battery |
-
1996
- 1996-03-28 JP JP07427496A patent/JP3426840B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09102330A (en) | 1997-04-15 |
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