JP2001015093A - Safety valve for sealed lead-acid battery, and sealed lead-acid battery - Google Patents

Safety valve for sealed lead-acid battery, and sealed lead-acid battery

Info

Publication number
JP2001015093A
JP2001015093A JP11181768A JP18176899A JP2001015093A JP 2001015093 A JP2001015093 A JP 2001015093A JP 11181768 A JP11181768 A JP 11181768A JP 18176899 A JP18176899 A JP 18176899A JP 2001015093 A JP2001015093 A JP 2001015093A
Authority
JP
Japan
Prior art keywords
safety valve
ring
sealed lead
acid battery
valve cylinder
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
JP11181768A
Other languages
Japanese (ja)
Inventor
Akira Ishiodori
彰 石踊
Morio Kobayashi
精男 小林
Yoshizumi Ishigaki
美積 石垣
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.)
ISHIGAKI RUBBER KOGYO KK
Resonac Corp
Original Assignee
ISHIGAKI RUBBER KOGYO KK
Shin Kobe Electric Machinery 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 ISHIGAKI RUBBER KOGYO KK, Shin Kobe Electric Machinery Co Ltd filed Critical ISHIGAKI RUBBER KOGYO KK
Priority to JP11181768A priority Critical patent/JP2001015093A/en
Publication of JP2001015093A publication Critical patent/JP2001015093A/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
    • 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 reduce irregularity in operation pressure range of a safety valve and to keep a sealed state even when flaws or foreign matters are adhered to a contact surface between the safety valve and a safety valve cylinder, by providing a plurality of ring-like projecting parts on the inside surface in contact with the safety valve cylinder of the safety valve. SOLUTION: Three ring-like projecting parts 6, for example, are provided on the cylindrical inside surface in contact with a safety valve cylinder of a cap-shaped safety valve 1 that is covered over the cylindrical safety valve cylinder, using a black chloroprene rubber. Area of these ring-like projecting parts 6, namely, total area of three ring-like projecting parts 6 where the safety valve 1 comes into contact with the safety valve cylinder is 40-50% of total inside area. Since the safety valve 1 comes into contact with the safety valve cylinder at the ring-like projecting parts 6, adhesion of both can be prevented, and difference between maximum and minimum of operation pressure, namely, irregularity in the operation pressure can be reduced. Even when flaws or foreign matters are adhered to a contact surface between the safety valve 1 and the safety valve cylinder, the plurality of ring-like projecting parts 6 are provided, so that a sealed state can be kept.

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、シール鉛蓄電池に
使用するキャップ形をしたゴム製の安全弁に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap-shaped rubber safety valve used for a sealed lead-acid battery.

【０００２】[0002]

【従来の技術】従来、小形のシール鉛蓄電池に用いられ
ている安全弁は、図２に示されるようにゴム製のキャッ
プ形をしたものであった。そして、図３に示されるよう
に中蓋4に設けられた安全弁筒2にかぶせられた状態で使
用されていた。なお、シール鉛蓄電池に用いられている
安全弁1は、主に以下に示す二つの役割をはたしてい
る。2. Description of the Related Art Conventionally, a safety valve used in a small sealed lead storage battery has a rubber cap shape as shown in FIG. Then, as shown in FIG. 3, it was used while being covered with a safety valve cylinder 2 provided on the inner lid 4. In addition, the safety valve 1 used for the sealed lead storage battery mainly plays the following two roles.

【０００３】第一の役割は、シール鉛蓄電池の内部に蓄
積したガスを外部に放出する役割である。すなわち、充
電時における酸素や水素などのガスの発生によって、シ
ール鉛蓄電池内部の圧力が異常に上昇した場合には、安
全弁1は安全弁筒2に沿って上昇した後、安全弁1の変形
によってガスを外部に放出して電池内部の圧力を低下さ
せ、電槽の膨れ（場合によっては破裂）を防止するもの
である（図２−（ａ））。そして、キャップ形をしたゴ
ム製の安全弁1が、電池内部の圧力によって上方向に移
動した状態においても、前記安全弁1が安全弁筒2から外
れない位置に上蓋3が設置されている。前記上蓋3は、超
音波溶着装置により中蓋4と溶着して固定されている。
なお、一般的なシール鉛蓄電池においては、加圧状態で
安全弁が作動して内部のガスを放出する圧力は、0.1〜
0.4kgf/cm2に設定されている。[0003] The first role is to release the gas accumulated inside the sealed lead-acid battery to the outside. That is, when the pressure inside the sealed lead-acid battery rises abnormally due to the generation of gas such as oxygen or hydrogen during charging, the safety valve 1 rises along the safety valve cylinder 2 and then the gas is deformed by the safety valve 1. By discharging the battery to the outside to reduce the pressure inside the battery, the battery case is prevented from swelling (in some cases, bursting) (FIG. 2- (a)). The upper lid 3 is provided at a position where the safety valve 1 does not come off the safety valve cylinder 2 even when the cap-shaped rubber safety valve 1 is moved upward by the pressure inside the battery. The upper lid 3 is fixed to the inner lid 4 by welding using an ultrasonic welding device.
In general, in a sealed lead-acid battery, the pressure at which the safety valve operates in a pressurized state to release the internal gas is 0.1 to
It is set to 0.4kgf / cm 2.

【０００４】第二の役割は、図２−（ｂ）に示すよう
に、大気中の酸素がシール鉛蓄電池の内部に流入するの
を防止する役割である。すなわち、充電時においてシー
ル鉛蓄電池の内部に蓄積した酸素は、負極におけるガス
吸収反応によって消費される。したがって、出荷中など
における正常なシール鉛蓄電池は、その内部が減圧状態
になっている。そして、シール鉛蓄電池の内部圧力が0
〜−0.4kgf/cm2の減圧状態では、大気がその内部に入り
込まないように設計されている。なお、安全弁によるガ
スのシールが不十分な場合には、充電状態の負極活物質
（金属鉛）は大気中の酸素と反応して酸化され、放電状
態の負極活物質（硫酸鉛）に変化する。そして、この状
態が長期間続くとシール鉛蓄電池が作動不能となった
り、その寿命が短くなるなどの問題点がある。[0004] The second role is to prevent oxygen in the atmosphere from flowing into the sealed lead-acid battery as shown in FIG. That is, oxygen accumulated inside the sealed lead storage battery during charging is consumed by the gas absorption reaction in the negative electrode. Therefore, the inside of a normal sealed lead storage battery during shipping or the like is in a reduced pressure state. And the internal pressure of the sealed lead acid battery is 0
It is designed so that the air does not enter into the inside thereof under a reduced pressure of -0.4 kgf / cm 2 . When the gas is not sufficiently sealed by the safety valve, the negative electrode active material (metal lead) in a charged state reacts with oxygen in the atmosphere to be oxidized and changes to a negative electrode active material (lead sulfate) in a discharged state. . If this state continues for a long period of time, there are problems that the sealed lead storage battery becomes inoperable and its life is shortened.

【０００５】上記したように、安全弁1はシール鉛蓄電
池の内部の圧力によって、安全弁筒2に沿って上下に移
動をするものである。そして、安全弁1の内側面の部分
は、安全弁筒2とくっつきにくく、上下の移動が容易に
できること及び設定した圧力範囲でガスの放出又はシー
ルをしなければならないという役割がある。なお、これ
らの安全弁はゴム製であり、あらかじめ彫り込みのある
金型を用いてモールド成形をして製造するものである。
そして、上記した作動圧力範囲のものを作製するには、
安全弁の寸法精度のバラツキを小さくする必要がある。
すなわち、図２に示すような従来の形状の安全弁を用い
ると、作動圧力の範囲にバラツキが生じ易いという問題
点があった。As described above, the safety valve 1 moves up and down along the safety valve cylinder 2 by the pressure inside the sealed lead-acid battery. The inner surface portion of the safety valve 1 has a role that it is hard to stick to the safety valve cylinder 2 and that it can be easily moved up and down and that gas must be released or sealed within a set pressure range. These safety valves are made of rubber, and are manufactured by molding using a mold having a carved in advance.
And, in order to produce the above operating pressure range,
It is necessary to reduce variations in dimensional accuracy of the safety valve.
That is, when the safety valve having the conventional shape as shown in FIG. 2 is used, there is a problem that the range of the operating pressure tends to vary.

【０００６】[0006]

【発明が解決しようとする課題】本発明の目的は、シー
ル鉛蓄電池安全弁の作動圧力範囲のバラツキを小さくす
ることである。SUMMARY OF THE INVENTION An object of the present invention is to reduce variations in the operating pressure range of a sealed lead-acid battery safety valve.

【０００７】[0007]

【課題を解決するための手段】上記課題を解決するため
に、本発明は安全弁の形状を改良することにした。すな
わち、第一の発明は、筒状の安全弁筒にかぶせて使用す
る、キャップ形をしたゴム製のシール鉛蓄電池用安全弁
において、前記安全弁の内側面に複数のリング状凸部を
設けることを特徴とし、第二の発明は、前記リング状凸
部の面積が、前記安全弁内側面の全面積の50%以下であ
ることを特徴としている。In order to solve the above problems, the present invention has improved the shape of the safety valve. That is, the first invention is a cap-shaped rubber sealed lead-acid battery safety valve used by covering over a cylindrical safety valve cylinder, wherein a plurality of ring-shaped convex portions are provided on the inner surface of the safety valve. The second invention is characterized in that the area of the ring-shaped protrusion is 50% or less of the total area of the inner surface of the safety valve.

【０００８】第三の発明は、請求項１、２のいずれか１
項記載のシール鉛蓄電池用安全弁をシール鉛蓄電池に用
いることを特徴としている。[0008] A third aspect of the present invention is any one of the first and second aspects.
The safety valve for a sealed lead-acid battery described in the paragraph is used for a sealed lead-acid battery.

【０００９】[0009]

【実施例】以下に示す（比較例）及び（実施例１、２）
に用いた安全弁1は、黒色のクロロプレンゴムを用いて
おり、形状の異なる金型を用いて、モールド成形して製
造したものである。そして、現在製造されている12V-6.
5Ahのシール鉛蓄電池の安全弁筒と同形状の試験用安全
弁筒にかぶせた状態で加圧して、安全弁1が作動する圧
力値を測定した。Examples (Comparative Examples) and (Examples 1 and 2) shown below
The safety valve 1 used in Example 1 uses black chloroprene rubber, and is manufactured by molding using molds having different shapes. And 12V-6 currently being manufactured.
The pressure was applied while covering the test safety valve cylinder having the same shape as the safety valve cylinder of the sealed lead-acid battery of 5 Ah, and the pressure value at which the safety valve 1 was operated was measured.

【００１０】（比較例）（比較例）として、従来から使
用されている図２の形状の安全弁を用いた。それ以外の
試験条件は、上記したものである。 （実施例１）（実施例１）として、図１の形状の安全弁
を用いた。この安全弁は、円筒形状をした内側面に３個
のリング状凸部6を有するものである。なお、安全弁の
うち、リング状凸部の面積を、その内側面の面積の50%
にした。それ以外の試験条件は、上記したものである。 （実施例２）（実施例２）として、図１の形状の安全弁
を用いた。この安全弁は（実施例１）と同様に、円筒形
状をした内側に３個のリング状凸部6を有するものであ
る。なお、安全弁のうち、リング状凸部の面積を、その
内側面の面積の40%にした。すなわち、安全弁が安全弁
筒と接触するリング状凸部の面積を、（実施例１）より
も小さくした。それ以外の試験条件等は、上記したもの
である。(Comparative Example) As a (Comparative Example), a conventionally used safety valve having a shape shown in FIG. 2 was used. Other test conditions are as described above. (Example 1) As (Example 1), a safety valve having the shape shown in FIG. 1 was used. This safety valve has three ring-shaped protrusions 6 on the inner surface having a cylindrical shape. In the safety valve, the area of the ring-shaped protrusion is 50% of the area of the inner surface.
I made it. Other test conditions are as described above. Example 2 As Example 2, a safety valve having the shape shown in FIG. 1 was used. This safety valve has three ring-shaped projections 6 inside a cylindrical shape, as in the first embodiment. In the safety valve, the area of the ring-shaped convex portion was set to 40% of the area of the inner surface. That is, the area of the ring-shaped convex portion where the safety valve comes into contact with the safety valve cylinder was made smaller than that of the first embodiment. Other test conditions are as described above.

【００１１】上記した（比較例）及び（実施例１、２）
の安全弁について、作動圧力を測定した結果を表１に示
す。（実施例１、２）を用いた場合には、（比較例）の
安全弁に比べて作動圧力のバラツキ（最大値と最小値の
差）が小さく優れている。本発明に係る安全弁1は、複
数のリング状凸部6で安全弁筒2と接触しているためにく
っつきにくく、作動圧力のバラツキが小さくなっている
ものと考えられる。(Comparative Example) and (Examples 1 and 2)
Table 1 shows the results of measuring the operating pressure of the safety valve of No. 1. When the first and second embodiments are used, the variation in the operating pressure (the difference between the maximum value and the minimum value) is small and superior to the safety valve of the comparative example. It is considered that the safety valve 1 according to the present invention hardly sticks because the plurality of ring-shaped protrusions 6 are in contact with the safety valve cylinder 2 and the variation in the operating pressure is reduced.

【００１２】さらに、万一、安全弁1と安全弁筒2の接触
面に傷や異物が付着していたとしても、複数のリング状
凸部6を有するため密閉状態を保つことができるなど、
従来の安全弁に比べて優れている。Furthermore, even if a contact surface between the safety valve 1 and the safety valve cylinder 2 is scratched or foreign matter is adhered, the sealing state can be maintained because of the plurality of ring-shaped protrusions 6.
It is superior to conventional safety valves.

【００１３】[0013]

【表１】 [Table 1]

【００１４】[0014]

【発明の効果】上述したように、本発明に係るシール鉛
蓄電池用安全弁は、その内側面に複数のリング状凸部を
有するものである。本発明をシール鉛蓄電池に用いる
と、安全弁の作動圧力のバラツキを小さくできる。さら
に、万一、安全弁と安全弁筒の接触面に傷や異物が付着
していたとしても、密閉状態を保つことができる点で優
れている。As described above, the safety valve for a sealed lead-acid battery according to the present invention has a plurality of ring-shaped protrusions on its inner surface. When the present invention is applied to a sealed lead storage battery, the variation in the operating pressure of the safety valve can be reduced. Further, even if a scratch or a foreign substance is attached to the contact surface between the safety valve and the safety valve cylinder, it is excellent in that the hermetically sealed state can be maintained.

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

【図１】本発明によるシール鉛蓄電池用安全弁の断面図
である。FIG. 1 is a sectional view of a safety valve for a sealed lead storage battery according to the present invention.

【図２】従来のシール鉛蓄電池用安全弁の断面図であ
る。FIG. 2 is a sectional view of a conventional safety valve for a sealed lead storage battery.

【図３】シール鉛蓄電池の安全弁付近の断面図である。 （ａ）加圧状態 （ｂ）減圧状態FIG. 3 is a sectional view of the vicinity of a safety valve of the sealed lead storage battery. (A) Pressurized state (b) Depressurized state

【符号の説明】[Explanation of symbols]

１：安全弁、 ２：安全弁筒、 ３：上蓋、 ４：中蓋、
５：排気孔、６：リング状凸部1: Safety valve, 2: Safety valve cylinder, 3: Upper lid, 4: Middle lid,
5: exhaust hole, 6: ring-shaped convex

───────────────────────────────────────────────────── フロントページの続き (72)発明者 石垣 美積 大阪府大阪市平野区平野南１丁目６番９号 石垣ゴム工業株式会社内 Ｆターム(参考） 5H012 AA07 BB03 CC01 CC06 CC08 DD03 DD05 EE01 EE09 GG03 GG05 JJ01  ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Mizumi Ishigaki 1-6-9, Hiranominami, Hirano-ku, Osaka, Osaka Prefecture F-term in Ishigaki Rubber Industries Co., Ltd. 5H012 AA07 BB03 CC01 CC06 CC08 DD03 DD05 EE01 EE09 GG03 GG05 JJ01

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】筒状の安全弁筒にかぶせて使用する、キャ
ップ形をしたゴム製のシール鉛蓄電池用安全弁におい
て、前記安全弁の内側面に複数のリング状凸部を設ける
ことを特徴とするシール鉛蓄電池用安全弁。1. A cap-shaped rubber safety valve for a lead-acid battery which is used to cover a cylindrical safety valve cylinder, wherein a plurality of ring-shaped projections are provided on an inner surface of the safety valve. Safety valve for lead-acid battery. 【請求項２】前記リング状凸部の面積が、前記安全弁内
側面の全面積の50%以下であることを特徴とする請求項
１記載のシール鉛蓄電池用安全弁。2. The safety valve for a sealed lead storage battery according to claim 1, wherein the area of the ring-shaped projection is 50% or less of the total area of the inner surface of the safety valve. 【請求項３】請求項１、２のいずれか１項記載のシール
鉛蓄電池用安全弁を用いたシール鉛蓄電池。3. A sealed lead-acid battery using the sealed lead-acid battery safety valve according to claim 1.
JP11181768A 1999-06-28 1999-06-28 Safety valve for sealed lead-acid battery, and sealed lead-acid battery Pending JP2001015093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11181768A JP2001015093A (en) 1999-06-28 1999-06-28 Safety valve for sealed lead-acid battery, and sealed lead-acid battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11181768A JP2001015093A (en) 1999-06-28 1999-06-28 Safety valve for sealed lead-acid battery, and sealed lead-acid battery

Publications (1)

Publication Number Publication Date
JP2001015093A true JP2001015093A (en) 2001-01-19

Family

ID=16106557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11181768A Pending JP2001015093A (en) 1999-06-28 1999-06-28 Safety valve for sealed lead-acid battery, and sealed lead-acid battery

Country Status (1)

Country Link
JP (1) JP2001015093A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012221632A (en) * 2011-04-05 2012-11-12 Gs Yuasa Corp Control valve type lead-acid battery
JP2013187148A (en) * 2012-03-09 2013-09-19 Gs Yuasa Corp Control valve type lead-acid storage battery
JP2021027000A (en) * 2019-08-08 2021-02-22 株式会社Ｇｓユアサ Power storage device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012221632A (en) * 2011-04-05 2012-11-12 Gs Yuasa Corp Control valve type lead-acid battery
JP2013187148A (en) * 2012-03-09 2013-09-19 Gs Yuasa Corp Control valve type lead-acid storage battery
JP2021027000A (en) * 2019-08-08 2021-02-22 株式会社Ｇｓユアサ Power storage device

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