JPH10106523A - Sealed battery - Google Patents
Sealed batteryInfo
- Publication number
- JPH10106523A JPH10106523A JP8258362A JP25836296A JPH10106523A JP H10106523 A JPH10106523 A JP H10106523A JP 8258362 A JP8258362 A JP 8258362A JP 25836296 A JP25836296 A JP 25836296A JP H10106523 A JPH10106523 A JP H10106523A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- valve
- internal pressure
- sealing plate
- sealed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H01M50/317—Re-sealable arrangements
-
- 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
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
-
- 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
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
- H01M50/333—Spring-loaded vent valves
-
- 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、密閉型電池の構造
に関し、更に詳しくは電池の安全弁機構の改良に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a sealed battery, and more particularly to an improvement of a battery safety valve mechanism.
【０００２】[0002]
【従来の技術】密閉型電池、特に密閉型ニッケル−カド
ミウム蓄電池においては、電池を過充電又は過放電した
場合には、電池内部で酸素ガスや水素ガスが異常発生す
ることがある。このためこの種の電池では、ガスの異常
発生により電池内圧が所定圧（しきい値）を超えたとき
ガスを電池外に放出し、このガス放出によって電池内圧
が低下したときには、再び電池が密閉化される復帰方式
の安全弁機構が組み込まれている。このような復帰方式
の安全弁機構は、しきい値圧力と付勢部材の押圧力とを
バランスさせ、電池内圧が定常状態のときには、スプリ
ング等で付勢された弾性弁体を封口板に密着させて封口
板に設けられた弁孔を塞ぎ、他方、電池内圧がしきい値
を超えた場合には、弾性弁体と弁孔との間に隙間を形成
してガスを電池外に排出する構造になっている。2. Description of the Related Art In a sealed battery, especially in a sealed nickel-cadmium storage battery, when the battery is overcharged or overdischarged, oxygen gas or hydrogen gas may be abnormally generated inside the battery. Therefore, in this type of battery, when the internal pressure of the battery exceeds a predetermined pressure (threshold) due to the occurrence of a gas abnormality, the gas is discharged out of the battery, and when the internal pressure of the battery decreases due to this gas release, the battery is closed again. A return type safety valve mechanism is incorporated. Such a return type safety valve mechanism balances the threshold pressure and the pressing force of the urging member, and when the battery internal pressure is in a steady state, brings the elastic valve body urged by a spring or the like into close contact with the sealing plate. Structure to close the valve hole provided in the sealing plate and, when the internal pressure of the battery exceeds a threshold value, form a gap between the elastic valve body and the valve hole to discharge gas out of the battery. It has become.
【０００３】しかし、この種の従来の安全弁機構は、電
池内圧が予想を超えて急激に上昇した場合における安全
性に問題を有していた。即ち、電池内圧が安全弁のガス
排出能力を超える程急激かつ異常に上昇した場合には、
安全弁は作動するものの、一時的に電池外装缶と封口板
からなる電池ケースが電池内圧に耐えられなくなり、電
池外装缶の底部または封口板が外方に突出して変形する
ことがある。また、このように電池内圧が急激かつ異常
に上昇する場合には、電池温度も上昇していることが多
く、この温度上昇により電池内容物、例えばナイロン
（セパレータ素材）などが溶融することがあり、安全弁
が作動して弾性弁体と封口板との間に隙間が形成されて
も、この隙間に前記溶融物が付着して、安全弁のガス排
出能力を低下させることがある。よって、従来の電池で
は、安全性が十分に確保されているとは言えなかった。However, this kind of conventional safety valve mechanism has a problem in safety when the internal pressure of the battery suddenly rises unexpectedly. In other words, if the battery internal pressure rises rapidly and abnormally so as to exceed the safety valve's gas discharge capability,
Although the safety valve operates, the battery case composed of the battery outer can and the sealing plate temporarily cannot withstand the internal pressure of the battery, and the bottom of the battery outer can or the sealing plate may protrude outward and deform. When the internal pressure of the battery rises rapidly and abnormally, the battery temperature often rises, and the battery content, for example, nylon (separator material) may melt due to the temperature rise. Even if the safety valve is operated to form a gap between the elastic valve body and the sealing plate, the melt may adhere to the gap and reduce the gas discharge capacity of the safety valve. Therefore, it cannot be said that the conventional batteries have sufficient safety.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記問題点
を解消するためになされたものであり、急激に電池内圧
が高まった場合であっても、確実に電池内のガスを逃が
すことのできる安全弁機構を案出し、もって安全性に優
れた密閉型電池を提供しようとするものである。SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is possible to reliably release gas in a battery even when the battery internal pressure is rapidly increased. It is an object of the present invention to devise a safety valve mechanism capable of providing a sealed battery having excellent safety.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、請求項１記載の発明は次の構成を有する。開口を有
する有底筒状の電池外装缶と、前記開口を封口する封口
板（２）と、封口板（２）に設けられた弁孔（２ａ）を
覆うようにして封口板（２）上に配置される、ガス放出
孔（１ａ）を有する電池キャップ（１）とを備え、かつ
封口板（２）と電池キャップ（１）とで形成される空間
内に復帰式の安全弁機構が収納された密閉型電池におい
て、前記安全弁機構は、弁孔（２ａ）を開閉するための
弁体（３）と、弁体（３）に対し弁孔（２ａ）を閉塞す
る方向に付勢力を及ぼす付勢部材（４）とを有し、か
つ、電池キャップ（１）の内側には、付勢部材の底面に
係合して付勢部材を支える突起部が設けられ、当該突起
部は、電池内圧が所定値以下のときには、付勢部材
（４）が第１の位置で弁体（３）を付勢し、電池内圧が
所定値を超えたときには係合が外れて、付勢部材（４）
が前記第１の位置における場合よりも弱い力で弁体
（３）を付勢する第２の位置への移動を可能とする形状
に形成されている。To achieve the above object, the invention according to claim 1 has the following configuration. A cylindrical battery can having a bottom having an opening, a sealing plate (2) for sealing the opening, and a valve hole (2a) provided in the sealing plate (2) so as to cover the sealing plate (2). And a battery cap (1) having a gas release hole (1a), and a return-type safety valve mechanism is housed in a space formed by the sealing plate (2) and the battery cap (1). In the sealed battery, the safety valve mechanism includes a valve element (3) for opening and closing the valve hole (2a), and a biasing force for applying a biasing force to the valve element (3) in a direction to close the valve hole (2a). And a projection for engaging the bottom surface of the biasing member and supporting the biasing member, and the projection is provided inside the battery cap (1). Is equal to or less than a predetermined value, the urging member (4) urges the valve body (3) at the first position, and the battery internal pressure exceeds the predetermined value. It is to come off the engagement, the biasing member (4)
Are formed in a shape that enables movement to a second position for urging the valve element (3) with a weaker force than in the first position.
【０００６】上記構成であると、電池内でのガスの発生
量が通常予想される範囲にあるときには、付勢部材が第
１の位置にあって弁孔の開放を制御する。一方、電池内
圧が異常かつ急激に上昇したときには、瞬間的に大きな
応力が弁体を介して付勢部材に加わり、この力によって
突起部と付勢部材との係合が外れる結果、付勢部材が第
２の位置に移動する。そして、このように付勢部材が第
２の位置に移動すると、弾性弁体が封口板を押圧する付
勢力が弱まるため、付勢部材が第１の位置にあったとき
よりも電池内部のガスを放出する能力が向上して、電池
内で異常かつ急激に発生したガスをスムーズに電池外部
に放出することができる。また、上記急激な電池内圧の
上昇が電池の温度上昇と共に生じて電池内容物が溶融
し、その溶融物が弾性弁体と封口板との間の隙間に付着
しても、前記付勢部材の付勢力の低下により、安全弁作
動時における弾性弁体と封口板との間の隙間が従来の安
全弁よりも大きくなるため、電池内部のガスを容易に放
出することが可能である。With the above configuration, when the amount of gas generated in the battery is within a normally expected range, the urging member is at the first position to control opening of the valve hole. On the other hand, when the battery internal pressure rises abnormally and rapidly, a large stress is momentarily applied to the urging member via the valve body, and this force disengages the projection from the urging member. Moves to the second position. When the urging member moves to the second position in this manner, the urging force of the elastic valve body pressing the sealing plate is weakened, so that the gas inside the battery is lower than when the urging member was at the first position. Is improved, and the gas generated abnormally and rapidly in the battery can be smoothly discharged to the outside of the battery. Further, even if the rapid increase in the internal pressure of the battery occurs with the increase in the temperature of the battery and the battery contents are melted and the melt adheres to the gap between the elastic valve body and the sealing plate, Since the gap between the elastic valve element and the sealing plate at the time of operation of the safety valve becomes larger than that of the conventional safety valve due to the decrease of the urging force, the gas inside the battery can be easily discharged.
【０００７】請求項２記載の発明は、請求項１記載の密
閉型電池において、前記突起部が、電池キャップの周壁
を内側に突出させて形成したものであることを特徴とす
る。この構成であると、突起部を形成するための部材を
必要としないので、低コストでもって安全性の高い密閉
型電池と成すことができる。According to a second aspect of the present invention, in the sealed battery according to the first aspect, the protrusion is formed by projecting a peripheral wall of a battery cap inward. According to this configuration, a member for forming the protrusion is not required, so that a sealed battery with high cost and high safety can be provided.
【０００８】請求項３記載の発明は、請求項１又は２記
載の密閉型電池において、前記付勢部材がコイルバネで
あることを特徴とする。弾力性に優れたコイルバネを使
用するこの構成であると、突起部で係合させ易いと共
に、コイルバネが第２の位置に移動した場合であって
も、優れた弾力性によって弁孔の開閉が好適に制御され
る。よって、本発明の効果が一層有効に発揮される。According to a third aspect of the present invention, in the sealed battery according to the first or second aspect, the biasing member is a coil spring. With this configuration using a coil spring having excellent elasticity, it is easy to engage with the protrusion, and even when the coil spring is moved to the second position, opening and closing of the valve hole is preferable due to excellent elasticity. Is controlled. Therefore, the effects of the present invention are more effectively exhibited.
【０００９】請求項４記載の発明は、請求項１又は２記
載の密閉型電池において、前記付勢部材（４）及び弁体
（３）が、弁体一体型弾性体（９）に置換されたことを
特徴とする。この構成であると、部品数が少なくなるの
で、安全弁機構の構造を単純化でき、その分コストの低
減が図れる。According to a fourth aspect of the present invention, in the sealed battery according to the first or second aspect, the urging member (4) and the valve body (3) are replaced with a valve body-integrated elastic body (9). It is characterized by having. With this configuration, since the number of parts is reduced, the structure of the safety valve mechanism can be simplified, and the cost can be reduced accordingly.
【００１０】[0010]
【実施の形態】本発明密閉型電池の第一の態様を図１〜
図３に示し、第二の態様を図４に示す。これらの図に基
づいて本発明の実施の形態を説明する。なお、図１は全
体構造を示す断面図、図２〜図４は、本発明の要部を示
す部分断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first embodiment of the sealed battery of the present invention is shown in FIGS.
This is shown in FIG. 3 and the second embodiment is shown in FIG. An embodiment of the present invention will be described based on these drawings. FIG. 1 is a cross-sectional view showing the entire structure, and FIGS. 2 to 4 are partial cross-sectional views showing main parts of the present invention.
【００１１】本発明の第一の態様にかかる密閉型電池
は、付勢部材としてコイルバネを用いたものである。以
下、ニッケル−カドミウム二次電池を具体例として図１
〜図３を参照しながら第一の態様にかかる電池構造を説
明する。この電池は、ニッケルを主体とする正極（図示
せず）とカドミウムを主体とする負極（図示せず）と、
これら両極間に介装されるセパレータ（図示せず）とを
巻回して成る発電要素８が、負極端子を兼用する有底筒
状の外装缶７内に内装されている。外装缶７の開口縁に
は封口板２が固定されており、より詳細には、リング状
の絶縁ガスケット６を介して外装缶７の開口縁に封口板
２がカシメ固定されている。封口板２の中央部には電池
内で発生したガスを逃がすための弁孔２ａ（ガス排出
孔）が設けられており、この弁孔２ａを覆うようにして
正極端子を兼ねる有底筒状の電池キャップ１が、封口板
に固定されている。The sealed battery according to the first aspect of the present invention uses a coil spring as an urging member. FIG. 1 shows a nickel-cadmium secondary battery as a specific example.
The battery structure according to the first embodiment will be described with reference to FIGS. This battery includes a positive electrode mainly composed of nickel (not shown), a negative electrode mainly composed of cadmium (not shown),
A power generating element 8 formed by winding a separator (not shown) interposed between these two electrodes is housed in a bottomed cylindrical outer can 7 which also serves as a negative electrode terminal. The sealing plate 2 is fixed to the opening edge of the outer can 7, and more specifically, the sealing plate 2 is fixed to the opening edge of the outer can 7 via a ring-shaped insulating gasket 6. A valve hole 2a (gas discharge hole) for allowing gas generated in the battery to escape is provided at a central portion of the sealing plate 2, and a bottomed cylindrical shape serving also as a positive electrode terminal so as to cover the valve hole 2a. Battery cap 1 is fixed to the sealing plate.
【００１２】電池キャップ１にはガスを電池外に排出す
るガス放出孔１ａが設けられ、電池キャップ１と封口板
２とで形成される空間内には、電池内圧が高まったとき
に作動する安全弁機構が組み込まれている。この安全弁
機構の詳細は次の通りである。封口板２の発電要素８と
反対側面には、封口板２に設けられた弁孔２ａを閉塞す
るための弁体３が配置されている。この弁体３は、鉄板
等にゴムなどの弾性体を張り付けたものであり、弾性体
側が弁孔２ａとなるように配置され、コイルバネ４Ａ
（付勢部材４）により、弁孔２ａを閉塞する方向に付勢
されている。The battery cap 1 is provided with a gas discharge hole 1a for discharging gas out of the battery, and a safety valve which operates when the internal pressure of the battery rises is provided in a space formed by the battery cap 1 and the sealing plate 2. A mechanism is incorporated. The details of this safety valve mechanism are as follows. A valve body 3 for closing a valve hole 2 a provided in the sealing plate 2 is arranged on a side of the sealing plate 2 opposite to the power generation element 8. The valve body 3 is formed by attaching an elastic body such as rubber to an iron plate or the like, and is disposed so that the elastic body side becomes the valve hole 2a.
It is urged by the (urging member 4) in a direction to close the valve hole 2a.
【００１３】また、電池キャップ１には、壁面を内側に
突出させてなる突起部５が形成されており、この突起部
５にコイルバネ４Ａの底面が係合されている（第１の位
置）。コイルバネ４Ａは、電池内圧が所定値以下の場合
においては、この第１の位置に位置し、ここから弁体３
に付勢力を及ぼす。図２にコイルバネが第１の位置にあ
る場合における安全弁機構の形状を示す。The battery cap 1 is provided with a protrusion 5 having a wall surface protruding inward, and the bottom surface of the coil spring 4A is engaged with the protrusion 5 (first position). The coil spring 4A is located at the first position when the battery internal pressure is equal to or lower than a predetermined value.
Exerts an urging force on FIG. 2 shows the shape of the safety valve mechanism when the coil spring is at the first position.
【００１４】他方、電池内圧が急激かつ異常に上昇した
場合においては、コイルバネ４Ａと突起部５との係合が
外れて、コイルバネは弁体３に対する付勢力が弱まる第
２の位置に移動する。この状態を図３に示す。なお、図
２、３では第２の位置を電池キャップの底面としたが、
これに限られるものではない。例えば、突起部５と電池
キャップ底面との間に、もう一つ突起部を設けてもよ
い。On the other hand, when the battery internal pressure rises suddenly and abnormally, the engagement between the coil spring 4A and the projection 5 is released, and the coil spring moves to the second position where the urging force on the valve body 3 is weakened. This state is shown in FIG. In FIGS. 2 and 3, the second position is the bottom surface of the battery cap.
However, it is not limited to this. For example, another projection may be provided between the projection 5 and the bottom surface of the battery cap.
【００１５】ここで、上記所定値とは、予め設定された
圧力値Ｐ1 以下の場合をいい、この圧力値Ｐ1 は電池の
安全性を考慮して任意に設定できる。この圧力値Ｐ1 を
超えて電池内圧が高まったとき前記係合が外れるように
するには、例えば突起の形状や突出し度合いを適当に変
化させ、コイルバネ４Ａと突起部５との係合程度を調節
する。また、例えばコイルバネ４Ａの弾性力を調節等す
ることにより、所望の放出ガス圧（しきい値）未満のと
きには、弁孔が閉塞され、しきい値から前記圧力値Ｐ1
までのガス圧の場合においては、コイルバネが第１の位
置にあって弁孔を開放するようにする。Here, the predetermined value refers to a case where the pressure value is equal to or less than a preset pressure value P 1 , and this pressure value P 1 can be arbitrarily set in consideration of battery safety. To the engagement is disengaged when the increased internal pressure of the battery exceeds the pressure value P 1 is, for example suitably changing the shape and protruding degree of the projections, the degree of engagement of the coil spring 4A and the projection 5 Adjust. Also, for example, by adjusting the elastic force of the coil spring 4A, the valve hole is closed when the pressure is lower than a desired discharge gas pressure (threshold value), and the pressure value P 1 is determined from the threshold value.
In the case of gas pressures up to, the coil spring is located at the first position to open the valve hole.
【００１６】ところで、図１〜図３では、付勢部材とし
てコイルバネを用いたが、付勢部材はコイルバネに限定
されるものではない、例えば「く」の字形状の板バネ、
或いは弾性ゴムからなるものであってもよい。また、図
１〜図３では、弁体として、鉄板等にゴムなどの弾性体
を張り付けた２層構造の板状物を用いたが、これに限ら
れるものでない。弁体は、付勢部材との関係において弁
孔を開閉できる形状・材質のものであればよく、例えば
金属や樹脂などからなるボール状のものであってもよ
い。更に、突起部は、電池キャップの内周を一周するよ
うに形成してもよく、或いは内周の数カ所に不連続的に
形成してもよい。また、突起部を有する他の部材を電池
キャップ内に新たに配置する方法であってもよい。な
お、突起部を不連続的に形成する場合には、好ましくは
周方向のほぼ均等な３箇所に形成するのがよい。In FIGS. 1 to 3, a coil spring is used as the urging member. However, the urging member is not limited to the coil spring. For example, a "-" shaped leaf spring,
Alternatively, it may be made of elastic rubber. Further, in FIGS. 1 to 3, a plate having a two-layer structure in which an elastic body such as rubber is attached to an iron plate or the like is used as the valve body, but the present invention is not limited to this. The valve body may be of any shape and material capable of opening and closing the valve hole in relation to the urging member, and may be, for example, a ball made of metal or resin. Further, the protrusion may be formed so as to make one round of the inner circumference of the battery cap, or may be formed discontinuously at several places on the inner circumference. Further, a method of newly disposing another member having a protruding portion in the battery cap may be employed. When the protrusions are formed discontinuously, it is preferable to form the protrusions at three substantially equal positions in the circumferential direction.
【００１７】本発明のもう一つの態様を、図４に示す。
この態様では、付勢部材と弁体とを一体化したゴム弾性
体９Ａ（弁体一体型弾性体９）が使用されている。この
ゴム弾性体９Ａは、弁孔を閉塞する弁体の機能と、弁孔
を開閉するための付勢力とを自らが兼ね備えている。こ
のような弁体一体型弾性体であっても、上述と同様な作
用効果が得られる。なお、図４では、弁体一体型弾性体
として、ゴムからなる弾性体を用いたが、ゴムに代えて
他の弾性体を使用できることは勿論である。Another embodiment of the present invention is shown in FIG.
In this embodiment, a rubber elastic body 9A (valve body integrated elastic body 9) in which the urging member and the valve body are integrated is used. The rubber elastic body 9A has both a function of a valve body for closing the valve hole and a biasing force for opening and closing the valve hole. Even with such a valve body-integrated elastic body, the same operation and effect as described above can be obtained. In FIG. 4, an elastic body made of rubber is used as the valve-body-integrated elastic body, but it goes without saying that another elastic body can be used instead of rubber.
【００１８】なお、上記では電池キャップ１を正極外部
端子とし、電池外装缶７を負極外部端子としたが、この
逆であってもよい。また、上記では密閉型ニッケル−カ
ドミウム二次電池を具体例としたが、例えばＬｉＮｉＯ
2 、ＬｉＣｏＯ2 等の正極活物質を主体とする正極と、
リチウムを吸蔵放出可能な炭素材料や、金属リチウム等
を主体とする負極と、ポリエチレンやポリプロピレン等
のポリオレフィン製の微多孔膜から成るセパレータとか
ら構成される非水電解液蓄電池、ニッケルを主体とする
正極と、水素吸蔵合金を主体とする負極と、ナイロン不
織布から成るセパレータとから構成される金属−水素ア
ルカリ蓄電池等にも本発明が好適に適用できる。In the above description, the battery cap 1 is a positive electrode external terminal and the battery outer can 7 is a negative electrode external terminal. In the above description, the sealed nickel-cadmium secondary battery is a specific example.
2 , a positive electrode mainly composed of a positive electrode active material such as LiCoO 2 ;
Non-aqueous electrolyte storage battery composed of a negative electrode mainly composed of a carbon material capable of occluding and releasing lithium or metallic lithium and a separator made of a microporous film made of polyolefin such as polyethylene or polypropylene, mainly composed of nickel The present invention can be suitably applied to a metal-hydrogen alkaline storage battery or the like including a positive electrode, a negative electrode mainly composed of a hydrogen storage alloy, and a separator made of a nonwoven nylon fabric.
【００１９】[0019]
【発明の効果】以上説明したように本発明によれば、電
池内圧が急激かつ異常に上昇した場合であっても２段階
に安全弁機構が動作して、電池内容物の噴出によって狭
められたガス逃げ道を拡大するように作用する。よっ
て、本発明によれば、密閉型電池の安全性が飛躍的に向
上する。As described above, according to the present invention, even when the internal pressure of the battery suddenly and abnormally increases, the safety valve mechanism operates in two stages, and the gas narrowed by the ejection of the battery contents. Acts to expand the escape route. Therefore, according to the present invention, the safety of the sealed battery is dramatically improved.
【図１】本発明の第一の態様にかかる密閉型蓄電池の断
面図である。FIG. 1 is a sectional view of a sealed storage battery according to a first embodiment of the present invention.
【図２】電池内圧が所定値以下である場合における付勢
部材の位置（第１の位置）を示す部分断面図である。FIG. 2 is a partial cross-sectional view illustrating a position (first position) of an urging member when a battery internal pressure is equal to or lower than a predetermined value.
【図３】電池内圧が所定値を超えた場合における付勢部
材の位置（第２の位置）を示す部分断面図である。FIG. 3 is a partial cross-sectional view showing a position (a second position) of an urging member when a battery internal pressure exceeds a predetermined value.
【図４】第二の態様における本発明密閉型電池の主要部
の部分断面図である。FIG. 4 is a partial sectional view of a main part of the sealed battery of the present invention in a second embodiment.
１ 電池キャップ １ａ ガス放出孔 ２ 封口板 ２ａ 弁孔 ３ 弁体 ４ 付勢部材 ４Ａ コイルバネ（付勢部材） ５ 突起部 ６ 絶縁ガスケット ７ 電池外装缶 ８ 発電要素 ９ 弁体一体型弾性体 ９Ａ ゴム弾性体（弁体一体型弾性体） DESCRIPTION OF SYMBOLS 1 Battery cap 1a Gas discharge hole 2 Sealing plate 2a Valve hole 3 Valve 4 Urging member 4A Coil spring (biasing member) 5 Projection 6 Insulating gasket 7 Battery outer can 8 Power generation element 9 Valve body integrated elastic body 9A Rubber elasticity Body (elastic body integrated with valve body)
Claims (4)
前記開口を封口する封口板（２）と、封口板（２）に設
けられた弁孔（２ａ）を覆うようにして封口板（２）上
に配置される、ガス放出孔（１ａ）を有する電池キャッ
プ（１）とを備え、かつ封口板（２）と電池キャップ
（１）とで形成される空間内に復帰式の安全弁機構が収
納された密閉型電池において、 前記安全弁機構は、弁孔（２ａ）を開閉するための弁体
（３）と、弁体（３）に対し弁孔（２ａ）を閉塞する方
向に付勢力を及ぼす付勢部材（４）とを有し、かつ、電
池キャップ（１）の内側には、付勢部材の底面に係合し
て付勢部材を支える突起部が設けられ、当該突起部は、
電池内圧が所定値以下のときには、付勢部材（４）が第
１の位置で弁体（３）を付勢し、電池内圧が所定値を超
えたときには係合が外れて、付勢部材（４）が前記第１
の位置における場合よりも弱い力で弁体（３）を付勢す
る第２の位置への移動を可能とする形状に形成されてい
る、ことを特徴とする密閉型電池。A bottomed cylindrical battery outer can having an opening;
A sealing plate (2) for closing the opening, and a gas discharge hole (1a) arranged on the sealing plate (2) so as to cover a valve hole (2a) provided in the sealing plate (2). A sealed battery including a battery cap (1), and a return-type safety valve mechanism housed in a space formed by the sealing plate (2) and the battery cap (1), wherein the safety valve mechanism has a valve hole. A battery (3) for opening and closing the valve (2a), and an urging member (4) for applying an urging force to the valve (3) in a direction to close the valve hole (2a); On the inner side of the cap (1), there is provided a projection that engages with the bottom surface of the biasing member and supports the biasing member.
When the battery internal pressure is equal to or lower than a predetermined value, the urging member (4) urges the valve body (3) at the first position, and when the battery internal pressure exceeds a predetermined value, the engagement is released, and the urging member ( 4) is the first
A sealed battery characterized in that it is formed in a shape that allows it to move to a second position for urging the valve element (3) with a weaker force than in the position (1).
側に突出させて形成したものである、請求項１記載の密
閉型電池。2. The sealed battery according to claim 1, wherein the protrusion is formed by projecting a peripheral wall of a battery cap inward.
項１又は２記載の密閉型電池。3. The sealed battery according to claim 1, wherein the biasing member is a coil spring.
性体（９）である、請求項１又は２記載の密閉型電池。4. The sealed battery according to claim 1, wherein the urging member and the valve body are a valve body integrated elastic body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25836296A JP3615322B2 (en) | 1996-09-30 | 1996-09-30 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25836296A JP3615322B2 (en) | 1996-09-30 | 1996-09-30 | Sealed battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10106523A true JPH10106523A (en) | 1998-04-24 |
| JP3615322B2 JP3615322B2 (en) | 2005-02-02 |
Family
ID=17319190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25836296A Expired - Fee Related JP3615322B2 (en) | 1996-09-30 | 1996-09-30 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3615322B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1041656A2 (en) * | 1999-03-30 | 2000-10-04 | Sanyo Electric Co., Ltd. | Hermetically sealed storage battery with venting system |
| JP2001110388A (en) * | 1999-10-08 | 2001-04-20 | Matsushita Electric Ind Co Ltd | Sealed storage battery |
| JP2007132276A (en) * | 2005-11-10 | 2007-05-31 | Denso Corp | Regulating valve |
| JP2007157635A (en) * | 2005-12-08 | 2007-06-21 | Fdk Energy Co Ltd | Cylindrical battery |
| CN113228394A (en) * | 2019-01-04 | 2021-08-06 | 曼·胡默尔有限公司 | Exhaust unit and electronic device housing, in particular battery housing |
| CN114784444A (en) * | 2022-05-07 | 2022-07-22 | 山东中鸿新能源科技有限公司 | Sodium ion battery protection device |
-
1996
- 1996-09-30 JP JP25836296A patent/JP3615322B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1041656A2 (en) * | 1999-03-30 | 2000-10-04 | Sanyo Electric Co., Ltd. | Hermetically sealed storage battery with venting system |
| EP1041656A3 (en) * | 1999-03-30 | 2003-03-05 | Sanyo Electric Co., Ltd. | Hermetically sealed storage battery with venting system |
| JP2001110388A (en) * | 1999-10-08 | 2001-04-20 | Matsushita Electric Ind Co Ltd | Sealed storage battery |
| JP4559567B2 (en) * | 1999-10-08 | 2010-10-06 | パナソニック株式会社 | Sealed storage battery |
| JP2007132276A (en) * | 2005-11-10 | 2007-05-31 | Denso Corp | Regulating valve |
| JP4518004B2 (en) * | 2005-11-10 | 2010-08-04 | 株式会社デンソー | Regulating valve |
| JP2007157635A (en) * | 2005-12-08 | 2007-06-21 | Fdk Energy Co Ltd | Cylindrical battery |
| CN113228394A (en) * | 2019-01-04 | 2021-08-06 | 曼·胡默尔有限公司 | Exhaust unit and electronic device housing, in particular battery housing |
| US11804633B2 (en) | 2019-01-04 | 2023-10-31 | Mann+Hummel Gmbh | Degassing unit and electronics housing, in particular battery housing |
| CN114784444A (en) * | 2022-05-07 | 2022-07-22 | 山东中鸿新能源科技有限公司 | Sodium ion battery protection device |
| CN114784444B (en) * | 2022-05-07 | 2024-04-12 | 山东中鸿新能源科技有限公司 | Sodium ion battery protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3615322B2 (en) | 2005-02-02 |
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