JP2000285893A - Sealed storage battery - Google Patents

Sealed storage battery

Info

Publication number
JP2000285893A
JP2000285893A JP11086810A JP8681099A JP2000285893A JP 2000285893 A JP2000285893 A JP 2000285893A JP 11086810 A JP11086810 A JP 11086810A JP 8681099 A JP8681099 A JP 8681099A JP 2000285893 A JP2000285893 A JP 2000285893A
Authority
JP
Japan
Prior art keywords
battery
spring
sealed
terminal cap
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11086810A
Other languages
Japanese (ja)
Inventor
Masayuki Saito
雅之 斎藤
Ryuji Kawase
龍二 川瀬
Tetsunori Matsuoka
哲則 松岡
Yoshiyuki Fujimoto
義之 藤元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP11086810A priority Critical patent/JP2000285893A/en
Publication of JP2000285893A publication Critical patent/JP2000285893A/en
Pending legal-status Critical Current

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
    • H01M50/333—Spring-loaded vent valves
    • 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
    • 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

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a sealed storage battery capable of surely opening a safety valve widely at a suddenly rise of a battery internal gas pressure to release a battery internal gas. SOLUTION: This sealed storage battery is constructed by storing a spring (a) and a valve plate 8 in the space formed by a sealed plate 6 and a terminal cap 7 provided with a first projection part 9 at center and a second projection part 10 in the periphery of the first projection part 9 having the projection amount smaller than that of the first projection part 9. A sealed body of the sealed storage battery is constructed by compressing and clamping the spring between the second projection part 10 of the terminal cap 7 and the valve plate 8 and by pressing the valve plate 8 against a through hole 5 of the sealed plate 6.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電池の内部圧力が
異常に上昇したときに電池の破損を防止することのでき
る安全弁を備えた密閉型蓄電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed storage battery provided with a safety valve capable of preventing the battery from being damaged when the internal pressure of the battery rises abnormally.

【０００２】[0002]

【従来の技術】一般に、ニッケル−カドミウム電池やニ
ッケル−金属水素化物電池などの蓄電池は、電池内部を
密閉した密閉型蓄電池として使用される。このような密
閉型蓄電池は、電池内部で発生したガスを電池内部で消
費するように構成されているが、電池内部ガス圧がある
一定圧以上に上昇した際には、電池の破損を防止するた
めに電池内部のガスを電池外部に放出する必要があり、
このため、安全弁が形成されている。2. Description of the Related Art Generally, a storage battery such as a nickel-cadmium battery or a nickel-metal hydride battery is used as a sealed storage battery in which the inside of the battery is sealed. Such a sealed storage battery is configured to consume gas generated inside the battery inside the battery, but prevents damage to the battery when the gas pressure inside the battery rises above a certain pressure. It is necessary to release the gas inside the battery to the outside of the battery,
For this reason, a safety valve is formed.

【０００３】また、蓄電池は再充電することにより繰り
返し使用することが可能なため、前記安全弁は電池内部
圧力が低下した時点で自己復帰することにより、再度電
池内部を密閉し、電池を使用可能な状態に戻すように構
成される。[0003] Further, since the storage battery can be used repeatedly by recharging, the safety valve self-returns when the internal pressure of the battery drops, thereby sealing the inside of the battery again and enabling the use of the battery. It is configured to return to the state.

【０００４】このような自己復帰型の安全弁は、実公昭
４７−３９５４２号公報に示されるように、通常、ガス
抜き用の透孔を形成した封口板と、この封口板の上部に
固定された端子キャップと、これら封口板及び端子キャ
ップで構成される内部空間に収納され前記封口板の透孔
を塞ぐ弁板と、弁板を透孔に圧接させるスプリングとか
らなる。前記スプリングは、前記封口板と端子キャップ
との間に圧縮した状態で挟持され、常時は、前記弁体を
ガス抜き用透孔に圧接して透孔を塞いでいる。そして、
大電流で放電したり、あるいは、過充電したりすること
により、電池内部圧力が一定の圧力よりも上昇した際に
は、電池内部圧力により前記弁板が押し上げられて透孔
から離れ、この弁孔より電池内部のガスを外部に放出
し、また、このガスの放出によって電池内部圧力が低下
すると、前記弁板が再度前記透孔を塞ぐようになってい
る。As shown in Japanese Utility Model Publication No. 47-39542, such a self-recovering type safety valve is usually provided with a sealing plate having a vent hole for degassing, and fixed on the upper portion of the sealing plate. It comprises a terminal cap, a valve plate housed in an internal space formed by the sealing plate and the terminal cap, and closing the through hole of the sealing plate, and a spring for pressing the valve plate against the through hole. The spring is sandwiched between the sealing plate and the terminal cap in a compressed state, and normally presses the valve body to the gas vent hole to close the gas hole. And
When the internal pressure of the battery rises above a certain pressure due to discharging with a large current or overcharging, the valve plate is pushed up by the internal pressure of the battery and separated from the through-hole, and this valve is opened. The gas inside the battery is released to the outside through the hole, and when the gas pressure inside the battery decreases due to the release of the gas, the valve plate again closes the through hole.

【０００５】[0005]

【発明が解決しようとする課題】この種安全弁を備えた
電池は、通常の使用では特に問題はないが、過度の過充
電及び過放電、あるいは、電池を異常な方法で使用した
場合には、電池内部圧力が急激に上昇するおそれがあ
る。このように、急激に電池内部ガス圧が上昇し、安全
弁のガス排出能力を超えてガスが発生すると、安全弁が
正常に作動したとしても、電池内部ガス圧の上昇により
電池の封口体が破損するおそれがある。A battery provided with a safety valve of this type has no particular problem in normal use. However, if the battery is excessively charged and discharged, or if the battery is used in an abnormal manner, The internal pressure of the battery may increase sharply. As described above, when the gas pressure inside the battery rises sharply and gas is generated exceeding the gas discharge capacity of the safety valve, even if the safety valve operates normally, the sealing body of the battery is damaged by the increase in the gas pressure inside the battery. There is a risk.

【０００６】本発明は、このような電池内部ガス圧の急
激な上昇時において、自己復帰する安全弁を確実に大き
く開弁させ、電池内部のガスを効率良く電池外部に放出
できるようにしようとするものである。[0006] The present invention is intended to ensure that the self-recovering safety valve is opened greatly when such gas pressure inside the battery suddenly rises, so that gas inside the battery can be efficiently discharged to the outside of the battery. Things.

【０００７】[0007]

【課題を解決するための手段】本発明は、上記課題を解
決するため、電池外装缶及びこの外装缶の開口部を塞ぐ
封口体により内部を密閉した密閉型蓄電池の前記封口体
として、透孔を有する封口板と、端子キャップと、これ
ら封口板及び端子キャップによって形成される空間に収
納された弁板及びこの弁板を前記封口板の透孔に圧接さ
せるスプリングとから構成したものを用い、前記端子キ
ャップとして、中央の第１突出部と、この第１突出部の
周辺に位置し、前記第１突出部よりも突出量の小さい第
２突出部を備えたものを使用して、前記スプリングを、
前記端子キャップの第２突出部と封口板との間に圧縮挟
持させて前記弁板を押圧することを特徴とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a battery storage can and a sealed storage battery in which the inside is hermetically sealed by a sealing body closing an opening of the housing can. A sealing plate having a terminal cap, a valve plate housed in a space formed by the sealing plate and the terminal cap, and a spring configured to press the valve plate against a through hole of the sealing plate using a spring. The terminal cap is provided with a first protrusion at the center and a second protrusion located at the periphery of the first protrusion and having a smaller protrusion amount than the first protrusion. To
The valve plate is pressed by being compressed and held between the second projecting portion of the terminal cap and the sealing plate.

【０００８】通常、密閉型蓄電池では、電池外装缶が負
極端子を兼用し、また、電池外装缶を封口する封口体は
正極端子を兼用するため、その封口体を構成する端子キ
ャップは、電池の端面より突出させる必要上、ある程度
の高さを持った形状となっている。このため、封口体に
収納されるスプリングもある程度の高さを持つことにな
る。Normally, in a sealed storage battery, the battery outer can also functions as a negative electrode terminal, and a sealing body for sealing the battery outer can also functions as a positive electrode terminal. Since it is necessary to protrude from the end face, it has a shape with a certain height. Therefore, the spring accommodated in the sealing member also has a certain height.

【０００９】スプリングは、荷重をＰ、スプリングの変
位（たわみ）をδ、ばね定数をｋとした場合、数１で示
されるように、同一の荷重がかかっても、ばね定数ｋの
値によりスプリングのたわみ量が変わってくる。つま
り、ばね定数が小さいほど、ばねはたわみやすく、荷重
がかかった際のスプリングの変位が大きくなる。Assuming that the load is P, the displacement (deflection) of the spring is δ, and the spring constant is k, as shown in Equation 1, even if the same load is applied, the spring has a value of the spring constant k. The amount of deflection changes. That is, the smaller the spring constant, the more easily the spring bends, and the greater the displacement of the spring when a load is applied.

【００１０】[0010]

【数１】 そして、このばね定数ｋは、数２で示す式によって算出
される。ここにおいて、Ｇは横弾性係数、ｄは材料の直
径、Ｄはコイルの平均直径、Ｎは巻数を示す。(Equation 1) Then, the spring constant k is calculated by the equation shown in Expression 2. Here, G is the transverse elastic modulus, d is the diameter of the material, D is the average diameter of the coil, and N is the number of turns.

【００１１】[0011]

【数２】 上記数２の式から明らかなように、スプリングの材料の
直径ｄが大きくなるほどばね定数ｋの値は大きくなる。
そして、このばね定数ｋが大きくなると、ばねは荷重が
加わっても小さくしかたわまなくなる。(Equation 2) As is apparent from the equation (2), the value of the spring constant k increases as the diameter d of the spring material increases.
When the spring constant k increases, the spring is only deflected even when a load is applied.

【００１２】ところで、上記の密閉型蓄電池では、スプ
リングにより弁板を封口板の弁孔に押圧させて構成する
が、このとき、封口体に収納されるスプリングの高さが
高くなる程、弁板を押圧する押圧力を一定の圧力にする
ためにはスプリングの材料の直径ｄを大きくしなければ
ならない。そして、スプリングの材料の直径ｄが大きく
なると、前記数２の式から明らかなように、ばね定数ｋ
が大きくなり、荷重がかかった際のばねのたわみが小さ
くなる。By the way, in the above-mentioned sealed storage battery, the valve plate is pressed against the valve hole of the sealing plate by a spring. At this time, as the height of the spring housed in the sealing body increases, the valve plate increases. In order to make the pressing force for pressing the pressure constant, the diameter d of the material of the spring must be increased. Then, as the diameter d of the material of the spring increases, the spring constant k becomes apparent from the equation (2).
And the deflection of the spring when a load is applied is reduced.

【００１３】つまり、このようにスプリングの高さが高
くなると、ばね定数ｋが大きくなるため、電池内の圧力
が弁作動圧よりも高くなり弁が作動する際のスプリング
の収縮量は小さくなる。That is, when the height of the spring increases, the spring constant k increases, so that the pressure in the battery becomes higher than the valve operating pressure, and the amount of contraction of the spring when the valve operates is reduced.

【００１４】本発明では、上記構成により、封口体を構
成する端子キャップの第１突出部により、負極端子の電
池の端面からの突出量を十分に確保すると同時に、第１
突出部よりも突出量の小さい第２突出部と封口板との間
にスプリングを配すことにより、スプリングの高さを低
くすることを可能としている。これにより、封口体に収
納するスプリングの材料の直径ｄを小さくしてばね定数
ｋを小さくすることができる。また、第２突出部は第１
突出部よりも径が大きくなるため、スプリングの平均直
径Ｄも大きくできるため、これによってもばね定数ｋを
小さくすることが可能である。このため、安全弁作動時
には、スプリングの収縮量が大きくなり、電池内部のガ
スを安全弁からより多量に放出することが可能となるた
め、電池内部カス圧が急激に上昇した場合においても、
ガスを電池外部に効率よく放出することが可能となり、
電池の破損を防止することができる。In the present invention, with the above configuration, the first projection of the terminal cap constituting the sealing body ensures a sufficient amount of the negative electrode terminal to protrude from the end face of the battery,
By arranging a spring between the second projecting portion having a smaller projecting amount than the projecting portion and the sealing plate, the height of the spring can be reduced. Thereby, the diameter d of the material of the spring housed in the sealing body can be reduced, and the spring constant k can be reduced. Also, the second protrusion is the first
Since the diameter is larger than that of the protruding portion, the average diameter D of the spring can also be increased, so that the spring constant k can be reduced. For this reason, when the safety valve is activated, the amount of contraction of the spring increases, and the gas inside the battery can be discharged in a larger amount from the safety valve.
Gas can be efficiently released outside the battery,
Battery damage can be prevented.

【００１５】[0015]

【発明の実施の形態】以下に本発明の一実施例を図面を
用いて説明する。 ［実施例］図１は本発明の密閉型電池の部分断面図、図
２は図１の電池の封口体の断面図である。これらの図に
おいて、１は鉄にニッケルメッキを施した有底円筒状の
電池外装缶であり、その内部に、ニッケル正極、カドミ
ウム負極、及び、これら正負極間に介挿されたセパレー
タを渦巻き状に巻回してなる電極体２が収納されてお
り、この電極体にはアルカリ電解液が注液されている。
そして、上記電池外装缶１の上方の開口部には、絶縁ガ
スケット３を介して、封口体４が配され、前記外装缶１
の開口部をかしめることによって、前記絶縁ガスケット
３及び封口体４が固定され、電池内部が密閉化されてい
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial sectional view of a sealed battery according to the present invention, and FIG. 2 is a sectional view of a sealing body of the battery of FIG. In these figures, reference numeral 1 denotes a cylindrical outer battery can with a nickel plating on iron, in which a nickel positive electrode, a cadmium negative electrode, and a separator interposed between the positive and negative electrodes are spirally wound. The electrode body 2 wound around is accommodated, and an alkaline electrolyte is injected into this electrode body.
A sealing body 4 is disposed at an opening above the battery outer can 1 via an insulating gasket 3.
By caulking the opening, the insulating gasket 3 and the sealing body 4 are fixed, and the inside of the battery is sealed.

【００１６】ここにおいて、前記封口体４は、中央に透
孔５を有する封口板６と、その中央部に溶接工程された
キャップ状の端子キャップ７を備え、これらは何れも鉄
にニッケルメッキを施したもので構成される。そして、
これら封口板６と端子キャップ７によって形成される内
部空間内に、弁板８及びＳＵＳ３０４からなるコイル状
スプリングａが収納されている。ここにおいて、弁板８
は、上面が鉄にニッケルメッキを施した金属板で、ま
た、下面がオレフィン系フィルムから構成され、これら
の間にＥＰＤＭ（エチレン−プロピレン−ジエンゴム）
製のゴムの層が介在する３層構造となっている。前記端
子キャップ７はその中央部に外部に突出する第１突出部
９を備え、その周囲にはこの第１突出部よりも突出量の
小さい第２突出部１０が形成され、突出部は第１突出部
９と第２突出部１０の２段の突出部で構成されている。
前記スプリングａは、この第２突出部１０の下面と封口
板６の上面の間に圧縮挟持され、前記弁板８を封口板６
の透孔５を塞ぐように押圧している。このスプリングを
収納する前記第２突出部１０の下面と弁板８との間の高
さは１．３ｍｍである。また、このスプリングａは、そ
の上部は前記端子キャップ７の第２突出部の内径と略同
等の大きな外径を有すると共に、その下部は弁孔より若
干大きい程度の小さな外径を有している。この電池を本
発明電池Ａとする。 ［比較例］図２は比較例の電池の封口体の断面図であ
り、封口板１１の中央部に溶接された端子キャップ１２
には、前記本発明電池Ａの第１突出部と同一の突出量の
突出部１４が形成されおり、突出部はこれのみで本発明
電池のような２段にはなっていない。そして、封口板１
１と端子キャップ１２で形成される空間には、コイル状
スプリングｂと弁板１３が収納され、弁板１３が封口板
１１に形成された弁孔１４を塞ぐように、スプリングｂ
によって押圧されている。このスプリングを収納する前
記端子キャップ１２の突出部の下面と弁板８との間の高
さは３．４ｍｍである。この封口体を用い、他は前記本
発明電池と同様にして比較電池Ｂを作製した。Here, the sealing body 4 includes a sealing plate 6 having a through hole 5 in the center, and a cap-shaped terminal cap 7 which is welded to the center of the sealing plate 6. It is composed of those that have been subjected. And
A coil spring a made of a valve plate 8 and SUS304 is housed in an internal space formed by the sealing plate 6 and the terminal cap 7. Here, the valve plate 8
Is a metal plate whose upper surface is nickel-plated with iron, and whose lower surface is composed of an olefin-based film, between which EPDM (ethylene-propylene-diene rubber)
It has a three-layer structure in which a rubber layer is formed. The terminal cap 7 has a first protruding portion 9 protruding to the outside at a central portion thereof, and a second protruding portion 10 having a smaller protruding amount than the first protruding portion is formed around the first protruding portion 9. The protruding portion 9 and the second protruding portion 10 are constituted by two protruding portions.
The spring a is compression-clamped between the lower surface of the second protrusion 10 and the upper surface of the sealing plate 6, and connects the valve plate 8 to the sealing plate 6.
Is pressed so as to close the through hole 5. The height between the lower surface of the second projecting portion 10 for housing the spring and the valve plate 8 is 1.3 mm. The upper portion of the spring a has a large outer diameter substantially equal to the inner diameter of the second projecting portion of the terminal cap 7, and the lower portion has a small outer diameter slightly larger than the valve hole. . This battery is referred to as Battery A of the present invention. [Comparative Example] FIG. 2 is a sectional view of a sealing body of a battery according to a comparative example, in which a terminal cap 12 welded to the center of a sealing plate 11 is shown.
Is formed with the same protrusion amount as the first protrusion of the battery A of the present invention, and the protrusion is not provided in two steps as in the battery of the present invention. And sealing plate 1
1 and a terminal cap 12, a coil spring b and a valve plate 13 are housed. The spring b is closed so that the valve plate 13 closes a valve hole 14 formed in the sealing plate 11.
Is pressed by. The height between the lower surface of the projecting portion of the terminal cap 12 for housing the spring and the valve plate 8 is 3.4 mm. Using this sealing body, a comparative battery B was prepared in the same manner as the battery of the present invention except for the above.

【００１７】こうして得られた本発明電池Ａと比較電池
Ｂの封口体内に収納されるスプリングの径、線径、並び
に、封口体に収納される前のスプリングの自由高さは表
１のとおりである。また、表１中スプリング径における
大径とは、スプリング上部の最大径を、また、小径とは
スプリング下部の最小径を示している。Table 1 shows the diameters and wire diameters of the springs stored in the sealed body of the battery A of the present invention and the comparative battery B thus obtained, and the free height of the spring before being housed in the sealed body. is there. In Table 1, the large diameter of the spring diameter indicates the maximum diameter of the upper part of the spring, and the small diameter indicates the minimum diameter of the lower part of the spring.

【００１８】これらのスプリングは、封口体に収納され
た状態で、本発明電池Ａでは、１．３ｍｍに圧縮されて
おり、また、比較電池Ｂでは３．４ｍｍに圧縮されてい
る。そして、これらは、何れも１．８ｋｇｆの荷重がか
かった状態であり、これらの安全弁の作動圧は約２０ｋ
ｇｆ／ｃｍ2である。These springs are compressed to 1.3 mm in the battery A of the present invention, and are compressed to 3.4 mm in the comparative battery B in a state housed in the sealing body. Each of these is in a state where a load of 1.8 kgf is applied, and the operating pressure of these safety valves is about 20 kF.
gf / cm 2 .

【００１９】[0019]

【表１】 このように、本発明電池Ａは比較電池Ｂよりスプリング
の径が大きくとれる。また、スプリングの収納高さが、
比較電池Ｂの３．４ｍｍに対して本発明電池Ａは１．３
ｍｍと低いため、同一の安全弁作動圧にしようとした場
合のスプリングの線径を本発明電池Ａでは小さくするこ
とが可能である。このように、本発明電池では、スプリ
ングの径が大きくとれ、スプリングの線径を小さくする
ことができるため、前述した数２の式から明らかなよう
に、バネ定数が小さくなる。[Table 1] Thus, the battery A of the present invention can have a larger spring diameter than the comparative battery B. Also, the storage height of the spring,
Battery A of the present invention is 1.3 mm compared to 3.4 mm of comparative battery B.
mm, the wire diameter of the spring can be reduced in the battery A of the present invention when trying to make the same safety valve operating pressure. As described above, in the battery of the present invention, since the diameter of the spring can be increased and the wire diameter of the spring can be reduced, the spring constant decreases as is clear from the above-described equation (2).

【００２０】次いで、上記本発明電池Ａの封口体に用い
たスプリングａと、比較電池Ｂの封口体に用いたスプリ
ングｂを用い、夫々のスプリングに圧縮方向に荷重をか
けたときの収縮量を調べた。この結果を表２に示す。Next, using the spring a used for the sealing body of the battery A of the present invention and the spring b used for the sealing body of the comparative battery B, the amount of shrinkage when a load was applied to each spring in the compression direction was determined. Examined. Table 2 shows the results.

【００２１】尚、表２では、１．８ｋｇｆの荷重をかけ
た場合のバネの高さ、即ち前記本発明電池Ａ及び比較電
池Ｂの封口体にスプリングを収納した状態のバネの高さ
を夫々ゼロとし、これを基準として、幾らバネの高さが
減少したかをその変化量で示している。In Table 2, the height of the spring when a load of 1.8 kgf is applied, that is, the height of the spring when the spring is housed in the sealing body of the battery A of the present invention and the comparative battery B is shown. Zero is used as a reference, and the amount of change in the height of the spring is indicated by the amount of change.

【００２２】[0022]

【表２】 表２より明らかなように、本発明電池Ａで用いたスプリ
ングａの方が、比較電池Ｂで用いたスプリングｂより、
同一荷重がかかった際のスプリングの収縮量が大きく、
電池内部のガスをスムースに放出できることが分かる。[Table 2] As is clear from Table 2, the spring a used in the battery A of the present invention was more excellent than the spring b used in the comparative battery B.
The amount of contraction of the spring when the same load is applied is large,
It can be seen that the gas inside the battery can be released smoothly.

【００２３】[0023]

【発明の効果】本発明によれば、封口体を構成する端子
キャップの第１突出部により、負極端子の電池の端面か
らの突出量を十分に確保できる。また、第１突出部より
も突出量の小さい第２突出部と封口板との間にスプリン
グを配すことにより、スプリングの高さを低くすること
を可能とし、これにより、封口体に収納するスプリング
の材料の直径を小さくしてばね定数を小さくすることが
できるため、安全弁作動時には、スプリングの収縮量が
大きくなり、電池内部のガスを安全弁からより多量に放
出することが可能となり、電池内部ガス圧が急激に上昇
した場合においても、ガスを電池外部に効率よく放出す
ることが可能となり、電池の破損を防止することができ
る。According to the present invention, the amount of protrusion of the negative electrode terminal from the end face of the battery can be sufficiently ensured by the first protrusion of the terminal cap constituting the sealing body. In addition, by disposing a spring between the second projecting portion having a smaller projecting amount than the first projecting portion and the sealing plate, it is possible to reduce the height of the spring, and thereby, the spring is housed in the sealing body. Since the spring constant can be reduced by reducing the diameter of the spring material, the amount of contraction of the spring during operation of the safety valve increases, allowing a greater amount of gas inside the battery to be discharged from the safety valve, and the inside of the battery to be released. Even when the gas pressure rises sharply, gas can be efficiently released to the outside of the battery, and damage to the battery can be prevented.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の密閉型電池の部分断面図FIG. 1 is a partial sectional view of a sealed battery according to the present invention.

【図２】図１の電池の封口体の断面図FIG. 2 is a sectional view of a sealing body of the battery of FIG. 1;

【図３】比較電池の封口体の断面図FIG. 3 is a cross-sectional view of a sealing body of a comparative battery.

【符号の説明】[Explanation of symbols]

１ 電池外装缶 ４ 封口体 ５ 透孔 ６ 封口板 ７ 端子キャップ ８ 弁板 ａ スプリング ９ 第１突出部 １２ 第２突出部 DESCRIPTION OF SYMBOLS 1 Battery outer can 4 Sealing body 5 Through hole 6 Sealing plate 7 Terminal cap 8 Valve plate a Spring 9 First protruding part 12 Second protruding part

───────────────────────────────────────────────────── フロントページの続き (72)発明者 松岡 哲則 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 藤元 義之 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 Ｆターム(参考） 5H012 AA01 BB02 BB11 DD01 DD06 DD17 EE01 EE04 EE09 GG01 GG07 JJ01  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsunori Matsuoka 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Yoshiyuki Fujimoto 2-chome, Keihanhondori, Moriguchi-shi, Osaka No.5-5 Sanyo Electric Co., Ltd. F term (reference) 5H012 AA01 BB02 BB11 DD01 DD06 DD17 EE01 EE04 EE09 GG01 GG07 JJ01

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 電池外装缶及びこの外装缶の開口部を塞
ぐ封口体により内部が密閉された密閉型蓄電池におい
て、前記封口体が、透孔を有する封口板と、端子キャッ
プと、これら封口板及び端子キャップによって形成され
る空間に収納された弁板及びこの弁板を前記封口板の透
孔に圧接させるスプリングとから構成され、前記端子キ
ャップは、中央の第１突出部と、この第１突出部の周辺
に位置し、前記第１突出部よりも突出量の小さい第２突
出部を備え、前記スプリングが、前記端子キャップの第
２突出部と封口板との間に圧縮挟持されて前記弁板を押
圧していることを特徴とする密閉型蓄電池。Claims: 1. A sealed battery according to claim 1, wherein the inside of the battery is sealed by a battery outer can and a sealing member closing an opening of the outer can, wherein the sealing member includes a sealing plate having a through hole, a terminal cap, and a sealing member. And a valve plate housed in a space defined by the terminal cap and a spring for pressing the valve plate against a through-hole of the sealing plate. The terminal cap has a first projection at the center, A second protruding portion which is located around the protruding portion and has a smaller protruding amount than the first protruding portion, wherein the spring is compressed and sandwiched between a second protruding portion of the terminal cap and a sealing plate; A sealed storage battery characterized by pressing a valve plate.
JP11086810A 1999-03-29 1999-03-29 Sealed storage battery Pending JP2000285893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11086810A JP2000285893A (en) 1999-03-29 1999-03-29 Sealed storage battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11086810A JP2000285893A (en) 1999-03-29 1999-03-29 Sealed storage battery

Publications (1)

Publication Number Publication Date
JP2000285893A true JP2000285893A (en) 2000-10-13

Family

ID=13897179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11086810A Pending JP2000285893A (en) 1999-03-29 1999-03-29 Sealed storage battery

Country Status (1)

Country Link
JP (1) JP2000285893A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007157635A (en) * 2005-12-08 2007-06-21 Fdk Energy Co Ltd Cylindrical battery
JP2008234894A (en) * 2007-03-19 2008-10-02 Matsushita Electric Ind Co Ltd Sealed type secondary battery
CN102097604A (en) * 2011-01-18 2011-06-15 杨福如 Lithium ion battery cover cap

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007157635A (en) * 2005-12-08 2007-06-21 Fdk Energy Co Ltd Cylindrical battery
JP2008234894A (en) * 2007-03-19 2008-10-02 Matsushita Electric Ind Co Ltd Sealed type secondary battery
CN102097604A (en) * 2011-01-18 2011-06-15 杨福如 Lithium ion battery cover cap

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