JPH09245757A - Battery having explosion-proof function - Google Patents

Battery having explosion-proof function

Info

Publication number
JPH09245757A
JPH09245757A JP8047634A JP4763496A JPH09245757A JP H09245757 A JPH09245757 A JP H09245757A JP 8047634 A JP8047634 A JP 8047634A JP 4763496 A JP4763496 A JP 4763496A JP H09245757 A JPH09245757 A JP H09245757A
Authority
JP
Japan
Prior art keywords
plate
gasket
battery
fixing plate
battery case
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
Application number
JP8047634A
Other languages
Japanese (ja)
Other versions
JP3652000B2 (en
Inventor
Norihisa Watabe
徳久 渡部
Minoru Inagaki
稔 稲垣
Takashi Fukuhara
敬司 福原
Masakazu Kitakata
雅一 北方
Tomoya Murata
知也 村田
Masatake Nishio
昌武 西尾
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.)
FDK Corp
Original Assignee
FDK Corp
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 FDK Corp filed Critical FDK Corp
Priority to JP04763496A priority Critical patent/JP3652000B2/en
Publication of JPH09245757A publication Critical patent/JPH09245757A/en
Application granted granted Critical
Publication of JP3652000B2 publication Critical patent/JP3652000B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

  • Gas Exhaust Devices For Batteries (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a battery having an explosion-proof function capable of improving shutdown of a conduction path and improving the reliability of a pressure-sensitive shutdown function. SOLUTION: A gasket is integrally brought into contact with a sectional L-shaped curve portion 8d at which the lower part of a sectional C-shaped bending part 8a surrounding the outer circumference parts of laminated terminal plates and a middle pressure sensitive plate embraces the outer circumference part of a fixing plate, and the sectional L-shaped curve portion 8d is spaced in the circumferential direction and is formed at a specified interval. As another constitution, the thickness of a vertical wall part 8b of the gasket is 15 to 70% of the thickness of a bottom part 8e of the sectional C-shaped bending part 8a. As another constitution, a reinforce ring is intervened between the inner circumference face of the vertical wall part 8b of the gasket and the outer circumference face of the fixing plate. As another constitution, a gap of its interval of 20% or more of the thickness of the bottom wall part 8b of the sectional C-shaped bending part 8a is provided between the vertical wall part 8b of the gasket and the outer circumference face of the fixing plate. As another constitution, a shallow recess part is provided on the top face of the fixing plate, and a middle pressure sensitive plate is provided with a downward protrusion part engagable with the inner circumference of the recess part.

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】この発明は、防爆機能を有す
る電池に関し、特に、リチウムイオン二次電池などの高
エネルギー密度の電池を対象とした技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery having an explosion-proof function, and more particularly to a technique for a battery having a high energy density such as a lithium ion secondary battery.

【０００２】[0002]

【従来の技術】高エネルギー密度の電池は一般に防爆機
能を有しており、この防爆機能としては内圧解放機
能、感圧遮断機能等がある。内圧解放機能は、電池ケ
ース内の圧力が異常上昇した時に電池内のガスを外部に
放出して爆発を防ぐものであり、感圧遮断機能は、電池
ケース内の圧力が異常上昇した時に充電電流または放電
電流を電池内部で遮断し、異常充電または異常放電が継
続するのを防ぐものである。2. Description of the Related Art Batteries having a high energy density generally have an explosion-proof function, and the explosion-proof functions include an internal pressure release function and a pressure-sensitive cutoff function. The internal pressure release function releases gas inside the battery to the outside to prevent an explosion when the pressure inside the battery case rises abnormally, and the pressure-sensitive cutoff function charges the charging current when the pressure inside the battery case rises abnormally. Alternatively, the discharge current is cut off inside the battery to prevent abnormal charging or abnormal discharge from continuing.

【０００３】高エネルギー密度のリチウムイオン二次電
池の多くは、内圧解放機能を備えているとともに感圧遮
断機能を有しており、短絡や過充電などの異常な状態に
なったとき、感圧遮断機能が働いて充電または放電を停
止させるとともに内圧解放機能が働くように設計されて
いる。この種の電池を設計する上できわめて重要なこと
は、高精度で信頼性の高い防爆機能をできるだけコンパ
クトに、かつ量産性の高い構造で実現し、電池の補助的
な付帯機能としてごく安価なものにすることである。Most of high energy density lithium ion secondary batteries have an internal pressure releasing function and a pressure-sensitive cutoff function. When an abnormal state such as a short circuit or overcharge occurs, the pressure-sensitive It is designed so that the cutoff function works to stop charging or discharging and the internal pressure release function works. What is extremely important in designing this type of battery is to realize a highly accurate and highly reliable explosion-proof function with a structure that is as compact as possible and highly mass-producible. It is to make things.

【０００４】内圧解放機能と感圧遮断機能を備えた電池
の代表的な構造が特開平２−２８８０６３号公報に示さ
れている。この電池は、有底円筒形の金属製電池ケース
と、電池ケースに収納された発電要素と、電池ケースの
開口部を塞ぐ蓋要素とから基本的に構成されるが、内圧
解放機能と感圧遮断機能は蓋要素に備えられている。蓋
要素は、ガス抜き穴のある外部端子板と、撓みやすくて
破断しやすい薄い金属板からなる中間感圧板と、リード
ストリッパと呼ぶ絶縁板を備えている。電池ケース内の
圧力が中間感圧板に作用し、圧力が高くなると中間感圧
板が外側に撓み、設定圧力以上になると中間感圧板が破
断し、外部端子板のガス抜き穴からガスが放出される。
これが内圧解放機能である。A typical structure of a battery having an internal pressure releasing function and a pressure-sensitive cutoff function is shown in Japanese Patent Laid-Open No. 288063. This battery basically consists of a cylindrical metal battery case with a bottom, a power generating element housed in the battery case, and a lid element that closes the opening of the battery case. A blocking function is provided in the lid element. The lid element includes an external terminal plate having a gas vent hole, an intermediate pressure-sensitive plate made of a thin metal plate that is easily bent and easily broken, and an insulating plate called a lead stripper. The pressure inside the battery case acts on the intermediate pressure sensitive plate, and when the pressure rises, the intermediate pressure sensitive plate bends outward, and when it exceeds the set pressure, the intermediate pressure sensitive plate breaks and gas is released from the gas vent hole of the external terminal board. .
This is the internal pressure release function.

【０００５】また、発電要素の一方の電極に接続されて
いるリードタブが前記絶縁板の中央の***ごしに中間感
圧板の中央突部に溶接されており、電池の内圧が異常上
昇すると、中間感圧板が外側に膨らむように変形するた
めリードタブは中間感圧板との溶接が剥離して外部端子
板につながる導電経路が遮断される。これが感圧遮断機
能である。Further, the lead tab connected to one electrode of the power generating element is welded to the central projection of the intermediate pressure-sensitive plate through the small hole in the center of the insulating plate, and when the internal pressure of the battery rises abnormally, the intermediate Since the pressure sensitive plate is deformed so as to bulge outward, the lead tab is separated from the intermediate pressure sensitive plate by welding, and the conductive path connecting to the external terminal plate is blocked. This is the pressure-sensitive cutoff function.

【０００６】前述した特開平２−２８８０６３号公報に
おいては、蓋要素の構成部品である中間感圧板と絶縁板
とを中間嵌合体により仮組みする構成とし、リードタブ
と中間感圧板の超音波溶接工程を容易化・高精度化し、
さらに蓋要素の組立および電池ケースへの取り付けを容
易化するように工夫している。しかし、つぎのような理
由で量産性および組立精度の面でまったく不十分であ
る。In the above-mentioned Japanese Patent Laid-Open No. 288063, the intermediate pressure-sensitive plate and the insulating plate, which are components of the lid element, are temporarily assembled by an intermediate fitting body, and the lead tab and the intermediate pressure-sensitive plate are ultrasonically welded. Has been made easier and more accurate,
Furthermore, it is devised to facilitate the assembly of the lid element and its attachment to the battery case. However, it is completely insufficient in terms of mass productivity and assembly accuracy for the following reasons.

【０００７】まず、中間感圧板にリードタブを溶接して
から蓋要素を組立てるという工程が著しく面倒だという
問題がある。つまり、電池ケースに収納した発電要素の
一方の電極に接続されているリードタブをケース外に引
き出し、そのリードタブと中間嵌合体で仮組みされた状
態の中間感圧板とを溶接し、その後、リードタブで電池
ケース側とつながった状態の中間感圧板の上面側に外部
端子板を重ね、中間感圧板の外周部分をかしめて外部端
子板と一体化し、さらにこれらの外周に封口ガスケット
を装着することになる。この作業全体が非常にハンドリ
ングの難しい工程となり、量産性を上げるのが困難であ
る。First, there is a problem that the step of assembling the lid element after welding the lead tab to the intermediate pressure-sensitive plate is extremely troublesome. That is, the lead tab connected to one electrode of the power generating element housed in the battery case is pulled out of the case, the lead tab is welded to the intermediate pressure-sensitive plate temporarily assembled by the intermediate fitting body, and then the lead tab is used. The external terminal board is overlaid on the upper surface side of the intermediate pressure-sensitive plate connected to the battery case side, the outer peripheral part of the intermediate pressure-sensitive plate is caulked to be integrated with the external terminal board, and a sealing gasket is attached to these outer circumferences. . This entire work is a very difficult process to handle, and it is difficult to improve mass productivity.

【０００８】また、中間感圧板の中央突部を絶縁板の小
穴にはめ込み、***ごしに突部にリードタブを溶接する
作業自体も面倒であり、精度を上げるのが難しい。さら
に、中間感圧板の中央突部にリードタブを溶接した後
で、中間感圧板の外周部分をかしめ加工して外部端子板
を一体化するが、このかしめ工程での機械的ストレスが
中間感圧板のリードタブ溶接点にも作用し、溶接点が剥
がれかかることがあり、そのため最終的に溶接強度がば
らつく。Also, the work itself of fitting the central protrusion of the intermediate pressure-sensitive plate into the small hole of the insulating plate and welding the lead tab to the protrusion through the small hole is troublesome, and it is difficult to improve the accuracy. Furthermore, after welding the lead tab to the central protrusion of the intermediate pressure-sensitive plate, the outer peripheral part of the intermediate pressure-sensitive plate is caulked to integrate the external terminal board.However, the mechanical stress in this caulking process causes It also acts on the lead tab welding point, and the welding point may peel off, so that the welding strength eventually varies.

【０００９】さらに、リードタブは一般に３mm程度の幅
を有するリボン状の板で柔軟性を有することから、電池
内圧が上昇して中間感圧板が変形するときこれに伴って
リードタブが中間嵌合体の小孔内に引きずり込まれてし
まって所定の内圧に対して確実に剥離しない場合が生じ
る。Further, since the lead tab is generally a ribbon-like plate having a width of about 3 mm and has flexibility, when the internal pressure of the battery rises and the intermediate pressure-sensitive plate is deformed, the lead tab is accompanied by a small size of the intermediate fitting body. There may be a case where it is dragged into the hole and is not reliably separated against a predetermined internal pressure.

【００１０】以上のようなことから、感圧遮断機能の動
作精度および信頼性が低下するなどの不具合が発生する
虞があった。As described above, there is a possibility that problems such as deterioration in the operating accuracy and reliability of the pressure-sensitive shutoff function may occur.

【００１１】[0011]

【発明が解決しようとする課題】そこで、前述したよう
な不具合を解決するものとして、本出願人が既に出願し
た特願平６−９６８６３号の明細書及び図面には、図７
（ａ）、（ｂ）の要部縦断面図に示すような防爆機能を
有する電池が記載されており、この電池の基本構成は、
電池の一方の電極をなす有底円筒形の金属製電池ケース
１と、この電池ケース１に収装された発電要素（図示
略）と、この発電要素の一方の電極に接続されたリード
タブ２と、リードタブ２と電気的に接続され電池ケース
１の開口部を塞ぐ蓋要素とからなる。Therefore, in order to solve the above-mentioned problems, the specification and the drawings of Japanese Patent Application No. 6-96863 filed by the applicant of the present invention include FIG.
A battery having an explosion-proof function as shown in the longitudinal sectional views of the main parts of (a) and (b) is described. The basic configuration of this battery is
A bottomed cylindrical metal battery case 1 forming one electrode of the battery, a power generating element (not shown) housed in the battery case 1, and a lead tab 2 connected to one electrode of the power generating element. , A lid element that is electrically connected to the lead tab 2 and closes the opening of the battery case 1.

【００１２】蓋要素は、電池の他方の電極をなす剛性の
比較的大きな金属製の端子板３と、正温度特性の感温抵
抗素子（ＰＣＴ素子）４と、撓みやすい金属板からなる
中間感圧板５と、絶縁性の固定板６と、上方に突出する
突部７ａおよび鍔部７ｂからなる導電部材７と、絶縁性
の筒状ガスケット８とを有している。端子板３はガス抜
き孔３ａがそれぞれ形成され、固定板６は、図８の平面
図及び図９の断面図に示すように、上面に浅い凹部６ｂ
が形成されるとともにガス透過孔６ａが形成されてお
り、中間感圧板５は所定の内圧で破断するように薄肉部
５ａが形成されている。導電部材７は円形の板の中央を
円錐台形状に突出させた突部７ａとその外周部からなる
鍔部７ｂからなり、固定板６に埋設されて一体化されて
いる。その突部７ａの頂部は固定板６の上面側に露出す
るとともに固定板６の下面側に鍔部７ｂの下面が露出し
ている。ガスケット８は、図７（ａ）、図１０（ａ）の
平面図、同図（ｂ）の縦断面図および同図（ｃ）の要部
縦断面図に示すように、断面Ｃ形湾曲部８ａとこれの下
方部に一体的に連らなって接続された断面Ｌ形屈曲部８
ｄから構成され、この屈曲部８ｄは垂直壁部８ｂと水平
壁部８ｃとから構成される。The lid element is a metal terminal plate 3 having a relatively large rigidity which constitutes the other electrode of the battery, a temperature sensitive resistance element (PCT element) 4 having a positive temperature characteristic, and an intermediate feeling made of a flexible metal plate. It has a pressure plate 5, an insulating fixing plate 6, a conductive member 7 composed of a protruding portion 7a and a flange portion 7b protruding upward, and an insulating tubular gasket 8. Each of the terminal plates 3 is formed with a gas vent hole 3a, and the fixed plate 6 has a shallow recess 6b on its upper surface as shown in the plan view of FIG. 8 and the sectional view of FIG.
And the gas permeation hole 6a are formed, and the intermediate pressure-sensitive plate 5 is formed with a thin portion 5a so as to be broken at a predetermined internal pressure. The conductive member 7 is composed of a protrusion 7a formed by projecting the center of a circular plate in a truncated cone shape and a flange 7b formed of the outer periphery thereof, and is embedded in the fixed plate 6 and integrated. The top of the protrusion 7a is exposed on the upper surface side of the fixed plate 6 and the lower surface of the flange 7b is exposed on the lower surface side of the fixed plate 6. As shown in the plan view of FIG. 7A, FIG. 10A, the longitudinal sectional view of FIG. 7B, and the longitudinal sectional view of the main part of FIG. 8a and a bent portion 8 having an L-shaped cross section, which is integrally connected to the lower portion of 8a
The bent portion 8d is composed of a vertical wall portion 8b and a horizontal wall portion 8c.

【００１３】このような蓋要素を電池ケース１の開口部
への組み付けるにあたり、先ず固定板６に埋設された導
電部材７と中間感圧板５とを予め超音波溶接しておく。
このとき、溶接点７ｃを十分強固に溶接して、内圧が上
昇して導電経路の遮断時に、中間感圧板５と導電部材７
との溶接点７ｃを剥離させるといった構成にせず、導電
部材７の溶接点７ｃの周囲を破断させる構成とする。In assembling such a lid element to the opening of the battery case 1, first, the conductive member 7 embedded in the fixing plate 6 and the intermediate pressure sensitive plate 5 are ultrasonically welded in advance.
At this time, the welding point 7c is welded sufficiently firmly, and when the internal pressure rises and the conductive path is cut off, the intermediate pressure sensitive plate 5 and the conductive member 7 are welded.
Instead of separating the welding point 7c from the welding point 7c, the periphery of the welding point 7c of the conductive member 7 is broken.

【００１４】そして、中間感圧板５の下面中央に対して
導電部材７の突部７ａ上面を局部的に溶接する一方、電
池ケース１の開口部に予めビーディング加工により縮径
されてできた段部１ａの上面にガスケット８を嵌入して
おく。そして、リードタブ２を導電部材７の鍔部７ｂの
下面に超音波溶接して、ガスケット８の断面Ｌ形屈曲部
８ｄ内に、導電部材７が埋設された固定板６及び中間感
圧板５をはめ込む。次に、断面Ｃ形湾曲部８ａ内に感温
抵抗素子４と端子板３とを順次はめ込み、最後に、電池
ケース１の開口部を内側にかしめてガスケット８のＣ形
湾曲部８ａを圧縮することにより、この湾曲部８ａを介
して端子板３、感温抵抗素子４及び中間感圧板５の周縁
部を電池ケース１の開口端部と段部１ａとの間で挾持
し、電池ケース１を密封する。The upper surface of the protrusion 7a of the conductive member 7 is locally welded to the center of the lower surface of the intermediate pressure-sensitive plate 5, while the opening of the battery case 1 is reduced in diameter by a beading process. The gasket 8 is fitted on the upper surface of the portion 1a. Then, the lead tab 2 is ultrasonically welded to the lower surface of the collar portion 7b of the conductive member 7, and the fixing plate 6 and the intermediate pressure-sensitive plate 5 in which the conductive member 7 is embedded are fitted into the L-shaped bent portion 8d of the gasket 8. . Next, the temperature-sensitive resistance element 4 and the terminal plate 3 are sequentially fitted into the C-shaped curved portion 8a of the cross section, and finally, the opening of the battery case 1 is caulked inward to compress the C-shaped curved portion 8a of the gasket 8. As a result, the peripheral portions of the terminal plate 3, the temperature-sensitive resistance element 4, and the intermediate pressure-sensitive plate 5 are held between the open end of the battery case 1 and the stepped portion 1a via the curved portion 8a, and the battery case 1 is held. Seal it.

【００１５】以上説明したような電池にあっては、発電
要素の一方の電極はリードタブ２により導電部材７に接
続され、導電部材７は突部７ａの上面の頂部７ｃ（溶接
点）で中間感圧板５に接続され、中間感圧板５は感温抵
抗素子４を介して端子板３に接続されている。この端子
板３は、電池の開口部を封口し、これに負荷回路が接続
されることになる。In the battery as described above, one electrode of the power generating element is connected to the conductive member 7 by the lead tab 2, and the conductive member 7 has an intermediate feeling at the top 7c (welding point) of the upper surface of the projection 7a. The intermediate pressure sensitive plate 5 is connected to the pressure plate 5, and the intermediate pressure sensitive plate 5 is connected to the terminal plate 3 via the temperature sensitive resistance element 4. This terminal board 3 seals the opening of the battery, and the load circuit is connected to this.

【００１６】このような構成の電池の使用にあたり、過
放電、過充電等により内部にガスが発生すると、電池ケ
ース１内のガス圧力は固定板６のガス透過孔６ａを通じ
て中間感圧板５に作用する。内圧が異常上昇すると、図
７（ｂ）に示すように、中間感圧板５が外側へ膨らむよ
うに変形し、導電部材７の溶接点７ｃの周囲が破断され
る。このことにより、端子板３につながる充電または放
電電流回路（導電経路）が遮断される（感圧遮断機
能）。中間感圧板５がさらに大きく変形するとついには
その薄肉部５ａが破断し、電池ケース１内のガスが外部
に放出される（内圧解放機能）。また、電池に接続され
ている外部回路が短絡されたりして大電流が流れ、電池
の温度が異常上昇すると、端子板３につながる充電また
は放電電流回路中に挿入されている感温抵抗素子４の抵
抗値が増大し、充電または放電電流を減少させる（感温
遮断機能）。When a battery having such a structure is used and gas is generated inside due to over-discharge, over-charge, etc., the gas pressure in the battery case 1 acts on the intermediate pressure sensitive plate 5 through the gas permeation hole 6a of the fixed plate 6. To do. When the internal pressure rises abnormally, as shown in FIG. 7B, the intermediate pressure sensitive plate 5 is deformed so as to bulge outward, and the periphery of the welding point 7c of the conductive member 7 is broken. As a result, the charge or discharge current circuit (conductive path) connected to the terminal board 3 is cut off (pressure-sensitive cutoff function). When the intermediate pressure-sensitive plate 5 is further deformed, its thin portion 5a is finally broken, and the gas in the battery case 1 is released to the outside (internal pressure releasing function). When a large current flows due to a short circuit of an external circuit connected to the battery and the battery temperature rises abnormally, the temperature sensitive resistance element 4 inserted in the charging or discharging current circuit connected to the terminal board 3 Increases the resistance value of and reduces the charge or discharge current (temperature-sensitive cutoff function).

【００１７】また以上の構成によれば、前述したよう
な、中間感圧板にリードタブを溶接してから蓋要素を組
立てるという工程や、中間感圧板の中央突部を絶縁板の
***にはめ込み***ごしに突部にリードタブを溶接する
作業をなくすことができ、感圧遮断機能の動作精度およ
び信頼性を向上させるようにしている。Further, according to the above construction, the step of assembling the lid element after welding the lead tab to the intermediate pressure-sensitive plate as described above, or the central protrusion of the intermediate pressure-sensitive plate is fitted into the small hole of the insulating plate. Moreover, the work of welding the lead tab to the protrusion can be eliminated, and the operation accuracy and reliability of the pressure-sensitive shutoff function can be improved.

【００１８】しかしながら、前述したような防爆機能を
有する電池にあっては、図１１（ａ）、（ｂ）に示すよ
うに、その組立時においてガスケット８のＣ形湾曲部８
ａが電池ケース１の開口部と段部１ａとの間で圧縮され
ると、ガスケット８の断面Ｃ形湾曲部８ａの底部８ｅが
電池ケース１の段部１ａ上を摺動しながら内方に押し出
されてくる。これに伴ってガスケット８の断面Ｌ形屈曲
部８ｄが内方へ押圧されるが、この屈曲部８ｄの内周面
は固定板６の外周面に密着した状態にあるため、この内
周面は固定板６の外周面に圧接しつつ下方にずれてい
く。つまり、ガスケット８の底部８ｅが電池ケース１の
段部１ａと中間感圧板５等の蓋部材との間に挾まれてい
るため、内方へ押されたガスケット８の屈曲部８ｄの内
周面はどうしても固定板６の外周面に圧接しつつ下方へ
逃げていってしまうのである。However, in the battery having the explosion-proof function as described above, as shown in FIGS. 11A and 11B, the C-shaped curved portion 8 of the gasket 8 is assembled at the time of assembly.
When a is compressed between the opening portion of the battery case 1 and the step portion 1a, the bottom portion 8e of the C-shaped curved portion 8a of the gasket 8 slides inward on the step portion 1a of the battery case 1. It is pushed out. Along with this, the bent portion 8d having an L-shaped cross section of the gasket 8 is pressed inward. However, since the inner peripheral surface of the bent portion 8d is in close contact with the outer peripheral surface of the fixing plate 6, the inner peripheral surface is It moves downward while being pressed against the outer peripheral surface of the fixed plate 6. That is, since the bottom portion 8e of the gasket 8 is sandwiched between the step portion 1a of the battery case 1 and the lid member such as the intermediate pressure-sensitive plate 5, the inner peripheral surface of the bent portion 8d of the gasket 8 pushed inward. Will inevitably escape downward while pressing against the outer peripheral surface of the fixed plate 6.

【００１９】前述したように、電池の異常な上昇による
導電経路の遮断にあたっては、中間感圧板５と導電部材
７との溶接点７ｃを剥離させるといった構成にせず、導
電部材７の溶接点７ｃの周囲を破断させる構成にしてい
るため、溶接点７ｃの十分な強度が必要とされ、これが
低下するようなことは必ず避けなければならない。As described above, when the conductive path is cut off due to the abnormal rise of the battery, the welding point 7c between the intermediate pressure-sensitive plate 5 and the conductive member 7 is not separated, but the welding point 7c of the conductive member 7 is removed. Since the structure is such that the periphery is broken, sufficient strength of the welding point 7c is required, and it is absolutely necessary to avoid lowering it.

【００２０】ところが前述したように、ガスケット８の
屈曲部８ｄの内周面が固定板６の外周面に圧接してしつ
つ下方へずれていくことにより、固定板６を下方へ移動
させる力が加わる。このため、固定板６に埋設された導
電部材７と中間感圧板５との溶接点７ｃに対して有害な
力が加わりその強度を低下させてしまい、最悪の場合に
は、図１１（ｂ）に示すように導電部材７の溶接点７ｃ
の周囲が破断して導電経路が遮断してしまうことが考え
られ、電池内圧の異常な上昇に対する導電経路の遮断精
度の向上が図れないといった問題があった。However, as described above, since the inner peripheral surface of the bent portion 8d of the gasket 8 is pressed downward against the outer peripheral surface of the fixed plate 6 and is displaced downward, a force for moving the fixed plate 6 downward is generated. Join. Therefore, a harmful force is applied to the welding point 7c between the conductive member 7 embedded in the fixed plate 6 and the intermediate pressure-sensitive plate 5 to reduce its strength, and in the worst case, FIG. As shown in FIG.
It is conceivable that the periphery of the battery may break and the conductive path may be blocked, and there is a problem in that it is not possible to improve the accuracy of blocking the conductive path against an abnormal increase in the battery internal pressure.

【００２１】また、固定板６に埋設された導電部材７と
中間感圧板５との溶接時の位置決め精度を向上させるた
め、固定板６の外径を大きめにしたり、ガスケット８の
屈曲部８ｄの内径を小さめにしたりして固定板６とガス
ケット８の屈曲部８ｄとの嵌め合いをきつくすると、前
述したように、その組立時においてガスケット８の屈曲
部８ｄが固定板６を下方へ移動させる力を加えてしま
い、導電経路の遮断精度の向上が図れない。そこで反対
に、固定板６とガスケット８の屈曲部８ｄとの嵌め合い
を緩くすれば、緩い分だけ固定板６が位置ずれし易くな
り、導電部材７と中間感圧板５との位置決めがやりにく
くなり、両者の溶接作業が面倒となる。このため、これ
らを溶接しやすいように固定板６と屈曲部８ｄとの嵌合
精度を上げるためガスケット８の断面Ｌ形屈曲部８ｄの
寸法精度に極めて注意を払わなくてはならなくなり、こ
の点、非常に面倒であった。Further, in order to improve the positioning accuracy when welding the conductive member 7 embedded in the fixed plate 6 and the intermediate pressure-sensitive plate 5, the outer diameter of the fixed plate 6 is increased or the bent portion 8d of the gasket 8 is formed. If the fixed plate 6 and the bent portion 8d of the gasket 8 are tightly fitted to each other by making the inner diameter smaller, as described above, the bending portion 8d of the gasket 8 moves the fixed plate 6 downward during assembly. Therefore, the accuracy of blocking the conductive path cannot be improved. On the contrary, if the fitting between the fixed plate 6 and the bent portion 8d of the gasket 8 is loosened, the fixed plate 6 is likely to be displaced due to the looseness, which makes it difficult to position the conductive member 7 and the intermediate pressure-sensitive plate 5. Therefore, the welding work of both becomes troublesome. Therefore, in order to improve the fitting accuracy between the fixing plate 6 and the bent portion 8d so that they can be easily welded, it is necessary to pay close attention to the dimensional accuracy of the L-shaped bent portion 8d in cross section of the gasket 8. It was very troublesome.

【００２２】この発明は前述した問題点に鑑みなされた
もので、その目的は、導電経路の遮断精度が向上し、感
圧遮断機能の信頼性を向上できる防爆機能を有する電池
を提供することにある。The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a battery having an explosion-proof function, which improves the breaking accuracy of a conductive path and improves the reliability of a pressure-sensitive breaking function. is there.

【００２３】[0023]

【課題を解決するための手段】前記目的を達成するため
請求項１に係る本発明では、有底筒形の電池ケースと、
この電池ケースに収納された発電要素と、前記発電要素
の一方の電極に接続されたリードタブと、前記リードタ
ブと電気的に接続され前記電池ケースの開口部を絶縁性
の筒状ガスケットを介して塞ぐ蓋要素とからなり、前記
蓋要素はガス抜き孔を有する金属製の端子板と可撓性を
有し破断しやすい中間感圧板とガス透過孔を有する絶縁
性の固定板とを順次積層するとともにこれらの外周部を
筒状の前記ガスケットで包被し、前記リードタブの先端
部を前記固定板に止着された導電部材に接続するととも
に前記導電部材を前記中間感圧板に溶接してなる防爆機
能を有する電池において、前記固定板は前記中間感圧板
よりも小径にしてその周縁部が肉厚に形成されてなり、
前記ガスケットは積層された前記端子板と前記中間感圧
板の外周部を囲繞してなる断面Ｃ形湾曲部の下方部が前
記固定板の外周部を抱持する断面Ｌ形屈曲部に一体的に
連接してなり、前記断面Ｌ形屈曲部が周方向に間隔を置
いて所定間隔で形成されてなる。In order to achieve the above object, the present invention according to claim 1 provides a battery case having a bottomed cylindrical shape,
The power generating element housed in the battery case, the lead tab connected to one electrode of the power generating element, and the opening of the battery case electrically connected to the lead tab are closed via an insulating tubular gasket. The lid element comprises a metal terminal plate having a gas vent hole, an intermediate pressure-sensitive plate having flexibility and being easily broken, and an insulating fixing plate having a gas permeation hole, which are sequentially laminated. An explosion-proof function obtained by covering the outer peripheral portion of the tubular gasket with the tubular gasket, connecting the leading end of the lead tab to a conductive member fixed to the fixing plate, and welding the conductive member to the intermediate pressure-sensitive plate. In the battery having, the fixing plate has a diameter smaller than that of the intermediate pressure-sensitive plate, and a peripheral portion thereof is formed to be thick,
The gasket is integrally formed with an L-shaped bent portion having a lower portion of a C-shaped curved portion surrounding the outer peripheral portions of the laminated terminal plate and the intermediate pressure-sensitive plate, which holds the outer peripheral portion of the fixed plate. The bent portions are L-shaped in cross section and are formed at predetermined intervals in the circumferential direction.

【００２４】前記目的を達成するため請求項２に係る本
発明では、前記ガスケットは積層された前記端子板と前
記中間感圧板の外周部を囲繞してなる断面Ｃ形湾曲部の
下方部が前記固定板の外周部を抱持する垂直壁部と水平
壁部とからなる断面Ｌ形屈曲部に一体的に連接してな
り、前記ガスケットの前記垂直壁部の肉厚を前記断面Ｃ
形湾曲部の底部の厚みの１５〜７０％の範囲とする。In order to achieve the above object, in the present invention according to claim 2, the gasket has a lower portion of a C-shaped curved section which surrounds an outer peripheral portion of the laminated terminal plates and the intermediate pressure-sensitive plate. The gasket is integrally connected to an L-shaped bent section having a vertical wall section and a horizontal wall section that holds the outer peripheral section of the fixing plate, and the wall thickness of the vertical wall section of the gasket is the C section.
The range is 15 to 70% of the thickness of the bottom of the curved portion.

【００２５】また前記目的を達成するため請求項３に係
る本発明では、前記ガスケットの前記垂直壁部の内周面
と前記固定板の外周面との間に補強リングを介装する。In order to achieve the above object, in the present invention according to claim 3, a reinforcing ring is interposed between the inner peripheral surface of the vertical wall portion of the gasket and the outer peripheral surface of the fixing plate.

【００２６】さらに前記目的を達成するため請求項４に
係る本発明では、前記ガスケットの前記垂直壁部と前記
固定板の外周面との間に前記断面Ｃ形湾曲部の底部の厚
みの２０％以上の間隔の空隙を設ける。Further, in order to achieve the above object, in the present invention according to claim 4, between the vertical wall portion of the gasket and the outer peripheral surface of the fixing plate, 20% of the thickness of the bottom portion of the C-shaped curved portion in cross section is provided. The voids having the above intervals are provided.

【００２７】さらにまた前記目的を達成するため請求項
５に係る本発明では、別構成として、有底筒形の電池ケ
ースと、この電池ケースに収納された発電要素と、前記
発電要素の一方の電極に接続されたリードタブと、前記
リードタブと電気的に接続され前記電池ケースの開口部
を絶縁性の筒状ガスケットを介して塞ぐ蓋要素とからな
り、前記蓋要素はガス抜き孔を有する金属製の端子板と
可撓性を有し破断しやすい中間感圧板とガス透過孔を有
する絶縁性の固定板とを順次積層するとともにこれらの
外周部を筒状の前記ガスケットで包被し、前記リードタ
ブの先端部を前記固定板に止着された導電部材に接続す
るとともに前記導電部材を前記中間感圧板に溶接してな
る防爆機能を有する電池において、前記固定板の上面に
浅い凹部を設けるとともに、前記凹部の内周部に係合可
能な下方突部を前記中間感圧板に設ける。Further, in order to achieve the above object, the present invention according to claim 5 provides, as another structure, a cylindrical battery case having a bottom, a power generating element housed in the battery case, and one of the power generating element. A lead tab connected to the electrode, and a lid element that is electrically connected to the lead tab and closes the opening of the battery case via an insulating tubular gasket, and the lid element is made of metal having a gas vent hole. The terminal plate, the intermediate pressure-sensitive plate which is flexible and easily broken, and the insulating fixing plate which has the gas permeation hole are sequentially laminated, and the outer peripheral portions of these are covered with the tubular gasket, and the lead tab is formed. In a battery having an explosion-proof function formed by connecting a tip end of a fixed member to a conductive member fixed to the fixed plate and welding the conductive member to the intermediate pressure-sensitive plate, a shallow recess is provided on an upper surface of the fixed plate. Together provided engagable beneath projections on the intermediate sensitive plate on the inner peripheral portion of the recess.

【００２８】以上の構成の本発明にあっては、次のよう
な作用を奏する。The present invention having the above-described structure has the following operation.

【００２９】請求項１に係る本発明にあっては、固定板
の外周部を抱持する断面Ｌ形屈曲部が周方向に間隔を置
いて所定間隔で形成されているので、電池の組立時にガ
スケットが電池ケースの開口端部で圧縮されてこれら屈
曲部が内方へ押圧されても、これら屈曲部が僅かに外方
に変形するに留まり、固定板を下方に押し下げてしまう
ことが確実に防止される。According to the first aspect of the present invention, since the L-shaped bent portions for holding the outer peripheral portion of the fixing plate are formed at predetermined intervals in the circumferential direction, when the battery is assembled. Even if the gasket is compressed at the open end of the battery case and these bends are pressed inward, it is possible that these bends will only be deformed slightly outward and the fixing plate will be pushed down. To be prevented.

【００３０】請求項２に係る本発明にあっては、ガスケ
ットの垂直壁部の肉厚を断面Ｃ形湾曲部の底部の厚みの
１５〜７０％の範囲としたので、電池の組立時にガスケ
ットの屈曲部が内方へ押圧されても、屈曲部が肉厚の薄
い垂直壁部を中心に外方へ湾曲して僅かに変形するに留
まり、固定板を下方に押し下げてしまうことが確実に防
止される。According to the second aspect of the present invention, the wall thickness of the vertical wall portion of the gasket is set to be in the range of 15 to 70% of the thickness of the bottom portion of the C-shaped curved portion in cross section. Even if the bent portion is pressed inward, the bent portion only bends outward around the thin vertical wall and slightly deforms, and it is possible to reliably prevent the fixing plate from being pushed down. To be done.

【００３１】請求項３に係る本発明にあっては、ガスケ
ットの垂直壁部の内周面と固定板の外周面との間に補強
リングを介装しているので、電池の組立時にガスケット
の屈曲部が内方へ押圧されても、補強リングはガスケッ
トの垂直壁部の押圧力を吸収するためこの押圧力が固定
板に伝わることが確実に防止される。According to the third aspect of the present invention, since the reinforcing ring is interposed between the inner peripheral surface of the vertical wall portion of the gasket and the outer peripheral surface of the fixing plate, the gasket can be assembled at the time of assembling the battery. Even if the bent portion is pressed inward, the reinforcing ring absorbs the pressing force of the vertical wall portion of the gasket, so that this pressing force is reliably prevented from being transmitted to the fixing plate.

【００３２】請求項４に係る本発明にあっては、ガスケ
ットの垂直壁部の内周面と固定板の外周面との間に断面
Ｃ形湾曲部の底部の厚みの２０％以上の間隔の空隙を設
けたので、電池の組立時にガスケットの屈曲部が内方へ
押圧されても、垂直壁部は固定板に接触しない、あるい
は接触したとしても固定板を下方へ押圧するまでに至ら
ない。According to a fourth aspect of the present invention, the gap between the inner peripheral surface of the vertical wall of the gasket and the outer peripheral surface of the fixing plate is 20% or more of the thickness of the bottom of the C-shaped curved section. Since the gap is provided, even if the bent portion of the gasket is pressed inward when the battery is assembled, the vertical wall portion does not come into contact with the fixed plate, or even if it comes in contact, the fixed plate is not pushed downward.

【００３３】請求項５に係る本発明にあっては、固定板
の上面に浅い凹部を設けるとともに、凹部の内周部に係
合可能な下方突部を中間感圧板に設けたので、電池の組
立時において固定板に埋設された導電部材と中間感圧板
との溶接を行う際に、これら凹部と下方突部との係合に
よって、固定板が包被されるガスケットの寸法誤差の影
響を受けることなくその位置決めを確実に行うことがで
きる。In the present invention according to claim 5, since the shallow concave portion is provided on the upper surface of the fixing plate, and the lower protruding portion engageable with the inner peripheral portion of the concave portion is provided on the intermediate pressure-sensitive plate, the battery When the conductive member embedded in the fixed plate and the intermediate pressure-sensitive plate are welded during assembly, the engagement of these recesses with the lower protrusions is affected by the dimensional error of the gasket with which the fixed plate is covered. The positioning can be surely performed without any need.

【００３４】[0034]

【発明の実施の形態】本発明の実施の第１〜５形態によ
る防爆機能を有する電池を、前述した図７（ａ）を適宜
転用して説明する。先ず、第１形態について説明すると
ガスケット８以外の構成は、基本的に図７（ａ）に示す
電池と同じであり、それら同一部分については同一の符
号を付しその説明は省略する。BEST MODE FOR CARRYING OUT THE INVENTION A battery having an explosion-proof function according to the first to fifth embodiments of the present invention will be described by appropriately converting FIG. 7 (a) described above. First, the first embodiment will be described. The configuration other than the gasket 8 is basically the same as that of the battery shown in FIG. 7A, and the same portions are denoted by the same reference numerals and the description thereof will be omitted.

【００３５】本形態の電池におけるガスケット８は、図
１（ａ）の平面図、同図（ｂ）の縦断面図および同図
（ｃ）の断面Ｌ形屈曲部８ｄの縦断面図に示すように、
平面が円弧状帯の断面Ｌ形屈曲部８ｄが周方向に１２０
゜の間隔で３つ形成されており、それぞれの断面Ｌ形屈
曲部の中心角は３０゜である。即ち、この屈曲部８ｄ
は、全周に亘って切れ目のない筒状ではなく、その大部
分が周方向に所定間隔で切り欠かれたようになってい
る。The gasket 8 in the battery of this embodiment is as shown in the plan view of FIG. 1A, the vertical sectional view of FIG. 1B and the vertical sectional view of the L-shaped bent portion 8d of FIG. To
The cross-section L-shaped bent portion 8d of which the plane is an arcuate band is 120 in the circumferential direction.
Three sections are formed at intervals of .degree., And the central angle of each L-shaped bent section is 30 degrees. That is, this bent portion 8d
Does not have a continuous tubular shape over the entire circumference, but most of it is notched at predetermined intervals in the circumferential direction.

【００３６】このような断面Ｌ形屈曲部８ｄで固定板６
の外周部を抱持するのであるが、断面Ｌ形屈曲部８ｄを
周方向に１２０゜の間隔で３つ形成したものにしても十
分に固定板６を保持することができる。また図７（ａ）
に示すように、その組立時においてガスケット８が電池
ケース１の開口部と段部１ａとの間で圧縮されると、ガ
スケット８の断面Ｃ形湾曲部８ａの底部８ｅが電池ケー
ス１の段部１ａ上を摺動しながら内方に押し出されてく
る。これに伴ってガスケット８の断面Ｌ形屈曲部８ｄが
内方へ押圧されるが、このとき、３つの屈曲部８ｄが周
方向に１２０゜の間隔で形成された構成となっているた
め、これら屈曲部８ｄが僅かに外方に変形するに留ま
り、固定板６を下方に押し下げてしまうことが確実に防
止される。したがって、固定板６が下方に押し下げられ
て導電部材７と中間感圧板５との溶接点７ｃに有害な力
が加わることを確実に防止でき、導電経路の遮断精度を
向上できる。The fixed plate 6 has such an L-shaped bent portion 8d in cross section.
The outer peripheral portion is held, but the fixing plate 6 can be sufficiently held even if three bent portions 8d having an L-shaped cross section are formed at intervals of 120 ° in the circumferential direction. FIG. 7 (a)
As shown in FIG. 3, when the gasket 8 is compressed between the opening of the battery case 1 and the step portion 1a during assembly, the bottom portion 8e of the C-shaped curved portion 8a of the gasket 8 has a step portion of the battery case 1. It is pushed inward while sliding on 1a. Along with this, the L-shaped bent portion 8d of the gasket 8 is pressed inward. At this time, since the three bent portions 8d are formed at intervals of 120 ° in the circumferential direction, these It is possible to reliably prevent the bent portion 8d from only slightly deforming outward and to push the fixing plate 6 downward. Therefore, it is possible to reliably prevent the fixing plate 6 from being pushed downward to exert a harmful force on the welding point 7c between the conductive member 7 and the intermediate pressure-sensitive plate 5, and it is possible to improve the accuracy of blocking the conductive path.

【００３７】本形態では、断面Ｌ形屈曲部８ｄを周方向
に１２０゜の間隔で３つ形成したが、同様の作用効果を
奏するのであれば適宜変形が可能であり、例えば中心角
３０゜の屈曲部８ｄを周方向に６０゜の間隔で６つ形成
してもよい。また、この他に、全周に亘って設けられた
断面Ｌ形屈曲部８ｄにほぼ径方向に所定間隔で切り込み
を入れるか、切欠部を設けても良い。In this embodiment, three bent portions 8d having an L-shaped cross section are formed at intervals of 120 ° in the circumferential direction, but they can be appropriately modified as long as the same effect can be obtained, for example, a central angle of 30 °. Six bent portions 8d may be formed at intervals of 60 ° in the circumferential direction. Further, in addition to this, it is also possible to make notches at the predetermined intervals in the radial direction at the L-shaped cross-section bent portion 8d provided over the entire circumference.

【００３８】以上、説明したようなガスケット８を用い
た本形態の防爆機能を有する電池について、高温保存試
験を行い、導電経路の遮断精度（電流遮断機能）が向上
したか否かを確認した。具体的には、中心角３０゜の断
面Ｌ形屈曲部８ｄを周方向に１２０゜の間隔で３つ形成
したガスケット８を用いた電池を本発明１、中心角３０
゜の屈曲部８ｄを周方向に６０゜の間隔で６つ形成した
ガスケット８を用いた電池を本発明２、前述した断面Ｌ
形屈曲部が全周に形成されたガスケットを用いた電池を
比較例とし、これら本発明１、２及び比較例の電池をそ
れぞれ５０個ずつ用意し、これら電池を１００℃の恒温
槽において５時間保存した後に、導電経路が遮断してい
るか否かをテスターを用いて調べた。As described above, the battery having the explosion-proof function of the present embodiment using the gasket 8 as described above was subjected to a high temperature storage test, and it was confirmed whether or not the interruption accuracy (current interruption function) of the conductive path was improved. Specifically, a battery using a gasket 8 in which three L-shaped bent portions 8d having a central angle of 30 ° are formed at intervals of 120 ° in the circumferential direction is the present invention 1, the central angle 30
A battery using a gasket 8 in which six bent portions 8d of 6 ° are formed at intervals of 60 ° in the circumferential direction is the present invention 2 and the cross section L described above.
As a comparative example, a battery using a gasket in which a shape-bent portion is formed on the entire circumference is prepared, 50 batteries of each of the present inventions 1 and 2 and the comparative example are prepared, and these batteries are stored in a constant temperature bath at 100 ° C. for 5 hours. After storage, it was examined using a tester whether or not the conductive path was blocked.

【００３９】この試験においては、電池を１００℃の高
温環境下に５時間おくだけであって積極的に内部圧力を
上昇させるわけではないので導電経路が遮断されていな
いことが望ましいとする。もしこれが遮断されていた場
合には、電池の組立時にガスケットの断面Ｌ形屈曲部８
ｄが固定板６を下方に押し下げてしまって導電部材７と
中間感圧板５との溶接点７ｃに有害な力が加わり、その
強度が弱められたと考えられる。In this test, it is preferable that the conductive path is not interrupted because the battery is only kept in a high temperature environment of 100 ° C. for 5 hours and the internal pressure is not positively increased. If this is interrupted, the cross-section L-shaped bent portion 8 of the gasket is assembled when the battery is assembled.
It is conceivable that d pushed the fixing plate 6 downward, and a harmful force was applied to the welding point 7c between the conductive member 7 and the intermediate pressure-sensitive plate 5, and the strength thereof was weakened.

【００４０】[0040]

【表１】 以上説明した保存試験の結果、表１に示すように、比較
例では５０個中１９個も導電経路が遮断されていたのに
対して、本発明１，２については１個も導電経路が遮断
されてはおらず、その遮断精度が向上したことを確認し
た。[Table 1] As a result of the storage test described above, as shown in Table 1, in the comparative example, 19 out of 50 conductive paths were blocked, whereas in Inventions 1 and 2, one conductive path was blocked. However, it was confirmed that the interruption accuracy was improved.

【００４１】次に本発明の実施の第２形態について説明
すると、図２（ａ）〜（ｃ）に示すように、本形態の電
池にあってはガスケット８の垂直壁部８ｂの肉厚ｄ２を
全周に亘って底部８ｅの厚みｄ１より薄くしている。具
体的には、肉厚ｄ２を底部８ｅの厚みｄ１の１５〜７０
％の範囲としている。本形態において以上説明した事項
以外については、基本的に前述した図７（ａ）に示す電
池と同じであり、それら同一部分については同一の符号
を付しその説明は省略する。Next, a second embodiment of the present invention will be described. As shown in FIGS. 2A to 2C, in the battery of this embodiment, the wall thickness d2 of the vertical wall portion 8b of the gasket 8 is set. Is thinner than the thickness d1 of the bottom portion 8e over the entire circumference. Specifically, the wall thickness d2 is 15 to 70 of the thickness d1 of the bottom portion 8e.
% Range. Other than the matters described above in the present embodiment, the battery is basically the same as the battery shown in FIG. 7A described above, and the same portions are denoted by the same reference numerals and the description thereof will be omitted.

【００４２】このような垂直壁部８ｂ及び水平壁部８ｃ
からなる断面Ｌ形屈曲部８ｄで固定板６の外周部を抱持
するのであるが、垂直壁部８ｂの肉厚ｄ２を底部８ｅの
厚みｄ１より薄くしても十分に固定板６を保持すること
ができる。また、その組立時において前記第１形態で説
明したように、ガスケット８が圧縮されるとガスケット
８の屈曲部８ｄが内方へ押圧される。このとき、ガスケ
ット８の垂直壁部８ｂの肉厚ｄ２を底部８ｅの厚みｄ１
より薄くしているため、屈曲部８ｄは肉厚の薄い垂直壁
部８ｂを中心に外方へ湾曲して僅かに変形するに留ま
り、固定板６を下方に押し下げてしまうことが確実に防
止される。したがって、固定板６が下方に押し下げられ
て導電部材７と中間感圧板５との溶接点７ｃに有害な力
が加わることを確実に防止でき、導電経路の遮断精度を
向上できる。Such vertical wall portion 8b and horizontal wall portion 8c
The outer peripheral portion of the fixed plate 6 is held by the bent portion 8d having an L-shaped cross section, but the fixed plate 6 is sufficiently held even if the wall thickness d2 of the vertical wall portion 8b is smaller than the thickness d1 of the bottom portion 8e. be able to. When the gasket 8 is compressed during assembly, the bent portion 8d of the gasket 8 is pressed inward as described in the first embodiment. At this time, the wall thickness d2 of the vertical wall portion 8b of the gasket 8 is changed to the thickness d1 of the bottom portion 8e.
Since the bent portion 8d is thinner, the bent portion 8d only bends outward around the thin vertical wall portion 8b and is slightly deformed, so that the fixing plate 6 is reliably prevented from being pushed downward. It Therefore, it is possible to reliably prevent the fixing plate 6 from being pushed downward to exert a harmful force on the welding point 7c between the conductive member 7 and the intermediate pressure-sensitive plate 5, and it is possible to improve the accuracy of blocking the conductive path.

【００４３】本形態では、ガスケット８の垂直壁部８ｂ
の肉厚ｄ２を全周に亘って断面Ｃ形湾曲部８ａの底部８
ｅの厚みｄ１より薄くしたが、同様の作用効果を奏する
のであれば適宜変形が可能であり、例えば垂直壁部８ｂ
の肉厚を周方向に変化させても良く、この肉厚を薄くす
る部分を所定間隔で設けたり、さらにこの薄くする部分
の厚みを０とする、即ち垂直壁部８ｂを所定間隔で切り
欠くようにしてもよい。In this embodiment, the vertical wall portion 8b of the gasket 8 is
Of the bottom portion 8 of the C-shaped curved portion 8a having a thickness d2 of
Although the thickness is smaller than the thickness d1 of e, it can be appropriately modified as long as the same effect can be obtained, for example, the vertical wall portion 8b.
May be varied in the circumferential direction, and portions for thinning the thickness may be provided at predetermined intervals, or the thickness of the portions for thinning may be set to 0, that is, the vertical wall portion 8b may be cut out at predetermined intervals. You may do it.

【００４４】以上、説明したようなガスケット８を用い
た本形態の防爆機能を有する電池について、前記第１形
態の場合と同様に高温保存試験を行い、導電経路の遮断
精度（電流遮断機能）が向上したか否かを確認した。具
体的には、底部８ｅの厚みｄ１を０．６mmとし、この厚
みｄ１に対して１５〜７０％の範囲内（１６，３３，５
０，６７％）のものを本発明とするとともに、この範囲
外（８，８３，１００％）のものを比較例とし、各％の
厚みの電池をそれぞれ５０個ずつ用意した。With respect to the battery having the explosion-proof function of the present embodiment using the gasket 8 as described above, a high temperature storage test is conducted in the same manner as in the case of the first embodiment, and the conduction path interruption accuracy (current interruption function) is confirmed. It was confirmed whether it improved. Specifically, the thickness d1 of the bottom portion 8e is set to 0.6 mm, and the thickness d1 is within a range of 15 to 70% (16, 33, 5).
(0,67%) was defined as the present invention, and those outside this range (8,83,100%) were used as comparative examples, and 50 batteries of each thickness were prepared.

【００４５】[0045]

【表２】 その結果、表２に示すように、比較例において８％のも
のについては、厚みｄ１が薄すぎて成形することができ
ず、８３％のものについては５０個中８個、１００％の
ものについては５０個中２７個も導電経路が遮断されて
いたのに対して、本発明については１個も導電経路が遮
断されてはおらず、その遮断精度を向上でき、且つ垂直
壁部８ｂの肉厚ｄ２は底部８ｅの厚みｄ１の１５〜７０
％の範囲内が望ましいことを確認した。[Table 2] As a result, as shown in Table 2, about 8% of Comparative Examples, the thickness d1 was too thin to be molded, and about 83% of 8 out of 50 and 100%. In the present invention, 27 of 50 conductive paths were blocked, whereas no conductive path was blocked in the present invention, and the blocking accuracy can be improved, and the thickness of the vertical wall portion 8b was increased. d2 is 15 to 70 of the thickness d1 of the bottom portion 8e.
It was confirmed that the range of% was desirable.

【００４６】次に本発明の実施の第３形態について説明
すると、図３（ａ）〜（ｃ）に示すように、本形態の電
池にあっては、ガスケット８の垂直壁部８ｂの内周面と
固定板６の外周面との間にステンレス（ＳＵＳ４３０）
製の補強リング１１を介装している。具体的には、この
補強リング１１の肉厚を０．２〜０．５mmの範囲として
いる。本形態において以上説明した事項以外について
は、基本的に前述した図７（ａ）に示す電池と同じであ
り、それら同一部分については同一の符号を付しその説
明は省略する。Next, the third embodiment of the present invention will be described. As shown in FIGS. 3 (a) to 3 (c), in the battery of this embodiment, the inner circumference of the vertical wall portion 8b of the gasket 8 is set. Between the surface and the outer peripheral surface of the fixed plate 6 (SUS430)
The reinforcing ring 11 made of aluminum is interposed. Specifically, the wall thickness of the reinforcing ring 11 is in the range of 0.2 to 0.5 mm. Other than the matters described above in the present embodiment, the battery is basically the same as the battery shown in FIG. 7A described above, and the same portions are denoted by the same reference numerals and the description thereof will be omitted.

【００４７】このような補強リング１１を介してガスケ
ット８は垂直壁部８ｂ及び水平壁部８ｃからなる断面Ｌ
形屈曲部８ｄで固定板６の外周部を抱持するのである
が、垂直壁部８ｂの内周面と固定板６の外周面との間に
補強リング１１を介装しても十分に固定板６を保持する
ことができる。また電池の組立時には、前記第１形態で
説明したように、ガスケット８が圧縮されるとガスケッ
ト８の垂直壁部８ｂが内方へ押圧される。このとき、補
強リング１１はガスケット８の垂直壁部８ｂの押圧力を
吸収するため、この押圧力が固定板６に伝わることが確
実に防止される。したがって、固定板６が下方に押し下
げられて導電部材７と中間感圧板５との溶接点７ｃに有
害な力が加わることを確実に防止でき、導電経路の遮断
精度を向上できる。Through the reinforcing ring 11, the gasket 8 has a cross section L composed of a vertical wall portion 8b and a horizontal wall portion 8c.
The outer peripheral portion of the fixed plate 6 is held by the shape bent portion 8d, but it is sufficiently fixed even if the reinforcing ring 11 is interposed between the inner peripheral surface of the vertical wall portion 8b and the outer peripheral surface of the fixed plate 6. The plate 6 can be held. When assembling the battery, as described in the first embodiment, when the gasket 8 is compressed, the vertical wall portion 8b of the gasket 8 is pressed inward. At this time, the reinforcing ring 11 absorbs the pressing force of the vertical wall portion 8b of the gasket 8, so that this pressing force is reliably prevented from being transmitted to the fixed plate 6. Therefore, it is possible to reliably prevent the fixing plate 6 from being pushed downward to exert a harmful force on the welding point 7c between the conductive member 7 and the intermediate pressure-sensitive plate 5, and it is possible to improve the accuracy of blocking the conductive path.

【００４８】本形態の補強リング１１にあっては、図３
（ｃ）の要部縦断面図に示すように断面が外側下角部の
切り欠かれた矩形としているが、同様の作用効果を奏す
るのであれば適宜変形が可能であり、例えばガスケット
８の断面Ｌ形屈曲部８ｄと同様に下方部から内方へ延出
する水平壁部を設けて断面Ｌ形にして、補強リング１１
が固定板６の外周を抱持するようにしてもよい。The reinforcing ring 11 of this embodiment has the structure shown in FIG.
As shown in the longitudinal cross-sectional view of the main part of (c), the cross section is a rectangular shape with the outer lower corner cut out, but it can be appropriately modified as long as the same effect can be obtained, for example, the cross section L of the gasket 8. Similar to the bent portion 8d, a horizontal wall portion extending inward from the lower portion is provided to have an L-shaped cross section, and the reinforcing ring 11 is formed.
May hold the outer periphery of the fixed plate 6.

【００４９】以上、説明した本形態の防爆機能を有する
電池について、前記第１形態の場合と同様に高温保存試
験を行い、導電経路の遮断精度（電流遮断機能）が向上
したか否かを確認した。具体的には、補強リング１１の
肉厚ｄ３を０．２〜０．５mmの範囲内（０．２，０．
３，０．５mm）のものを本発明とし、この範囲外（０．
１mm）のもの及び補強リングを設けていない前述した図
７（ａ）に示す電池を比較例とし、各％の厚みの電池を
それぞれ５０個ずつ用意した。As described above, the battery having the explosion-proof function of the present embodiment is subjected to the high temperature storage test as in the case of the first embodiment, and it is confirmed whether or not the interruption accuracy (current interruption function) of the conductive path is improved. did. Specifically, the wall thickness d3 of the reinforcing ring 11 is within the range of 0.2 to 0.5 mm (0.2, 0.
In the present invention, those having a thickness of 3, 0.5 mm are outside the range (0.
1 mm) and the above-mentioned battery shown in FIG. 7 (a) not provided with a reinforcing ring were used as comparative examples, and 50 batteries each having a thickness of each% were prepared.

【００５０】[0050]

【表３】 その結果、表３に示すように、比較例において、補強リ
ング１１の肉厚ｄ３が０．１mmのものについては５０個
中５個、導電経路が遮断されており、これは厚みｄ３が
薄すぎるためガスケット８の屈曲部８ｄの押圧力を補強
リング１１が吸収しきれなかったとみられる。また、補
強リングを設けていない電池については５０個中２１個
も導電経路が遮断されていた。これらに対して、本発明
にあっては１個も導電経路が遮断されてはおらず、その
遮断精度を向上でき、且つ肉厚ｄ３は０．２mm以上が望
ましいことを確認した。[Table 3] As a result, as shown in Table 3, in the comparative example, for the reinforcing ring 11 having the wall thickness d3 of 0.1 mm, 5 out of 50 conductive paths are blocked, which is too thin. Therefore, it seems that the reinforcing ring 11 could not absorb the pressing force of the bent portion 8d of the gasket 8. In addition, in the battery without the reinforcing ring, the conductive path was blocked in 21 out of 50 batteries. On the other hand, in the present invention, it was confirmed that even one conductive path is not blocked, the blocking accuracy can be improved, and the wall thickness d3 is preferably 0.2 mm or more.

【００５１】次に本発明の実施の第４形態について説明
すると、図４（ａ）〜（ｃ）に示すように、ガスケット
８の垂直壁部８ｂの内周面と固定板６の外周面との間に
全周に亘って円筒状の空隙ｄ４を設けている。具体的に
は、円筒状空隙ｄ４の径方向の間隔を底部８ｅの厚みｄ
１の２０％以上としている。本形態において以上説明し
た事項以外については、基本的に前述した図７（ａ）に
示す電池と同じであり、それら同一部分については同一
の符号を付しその説明は省略する。Next, the fourth embodiment of the present invention will be described. As shown in FIGS. 4A to 4C, the inner peripheral surface of the vertical wall portion 8b of the gasket 8 and the outer peripheral surface of the fixing plate 6 are A cylindrical void d4 is provided along the entire circumference. Specifically, the radial distance between the cylindrical voids d4 is set to the thickness d of the bottom portion 8e.
20% or more of 1. Other than the matters described above in the present embodiment, the battery is basically the same as the battery shown in FIG. 7A described above, and the same portions are denoted by the same reference numerals and the description thereof will be omitted.

【００５２】このような垂直壁部８ｂ及び水平壁部８ｃ
からなる断面Ｌ形屈曲部８ｄで固定板６の外周部を抱持
するのであるが空隙ｄ４を設けても屈曲部８ｄで十分に
固定板６を保持することができる。また電池の組立時に
は、前記第１形態で説明したようにガスケット８が圧縮
されるとガスケット８の屈曲部８ｄが内方へ押圧され
る。このとき、ガスケット８の垂直壁部８ｂと固定板６
の外周面との間に空隙ｄ４があるので垂直壁部８ｂが固
定板６に接触しない、あるいは接触したとしても固定板
６を下方へ押圧するまでに至らない。したがって、固定
板６が下方に押し下げられて導電部材７と中間感圧板５
との溶接点７ｃに有害な力が加わることを確実に防止で
き、導電経路の遮断精度を向上できる。Such vertical wall portion 8b and horizontal wall portion 8c
The outer peripheral portion of the fixed plate 6 is held by the bent portion 8d having an L-shaped cross section, but the fixed portion 6 can be sufficiently held by the bent portion 8d even if the gap d4 is provided. When assembling the battery, as described in the first embodiment, when the gasket 8 is compressed, the bent portion 8d of the gasket 8 is pressed inward. At this time, the vertical wall portion 8b of the gasket 8 and the fixing plate 6 are
Since there is a space d4 between the vertical wall 8b and the outer peripheral surface, the vertical wall portion 8b does not contact the fixing plate 6, or even if the vertical wall portion 8b contacts the fixing plate 6, the fixing plate 6 cannot be pressed downward. Therefore, the fixing plate 6 is pushed downward, and the conductive member 7 and the intermediate pressure-sensitive plate 5 are pushed down.
It is possible to reliably prevent a harmful force from being applied to the welding point 7c of the and, and improve the cutoff accuracy of the conductive path.

【００５３】以上、説明した本形態の防爆機能を有する
電池について、前記第１形態の場合と同様に高温保存試
験を行い、導電経路の遮断精度（電流遮断機能）が向上
したか否かを確認した。具体的には、底部８ｅの厚みｄ
１を０．６mmとし、この厚みｄ１に対して空隙ｄ４の間
隔が２０％以上（２５，３３，５０，６７，８３％）の
ものを本発明とするとともに、この範囲外（０，１７
％）のものを比較例とし、各％の電池をそれぞれ５０個
ずつ用意した。The above-described battery having the explosion-proof function of the present embodiment is subjected to a high temperature storage test as in the case of the first embodiment, and it is confirmed whether or not the interruption accuracy (current interruption function) of the conductive path is improved. did. Specifically, the thickness d of the bottom portion 8e
1 is set to 0.6 mm, and the gap d4 has a gap of 20% or more (25, 33, 50, 67, 83%) with respect to the thickness d1.
%) Was used as a comparative example, and 50 batteries of each% were prepared.

【００５４】[0054]

【表４】 その結果、表４に示すように、比較例において空隙ｄ４
の設けられていない０％のものについては５０個中２９
個導電経路が遮断され、また、１７％のものについては
５０個中７個、導電経路が遮断されており、これらは、
空隙ｄ４の間隔が小さすぎてガスケット８の屈曲部８ｄ
が固定板６の外周に当接して固定板６を下方へ押圧し、
導電部材と中間感圧板との溶接点７ｃに有害な力が加わ
っていたものとみられる。これらに対して、本発明につ
いては１個も導電経路が遮断されてはおらず、その遮断
精度を向上でき、且つ空隙ｄ４の間隔を底部８ｅの厚み
ｄ１の２０％以上とすることが望ましいことを確認し
た。[Table 4] As a result, as shown in Table 4, the void d4 in the comparative example was obtained.
29 out of 50 for 0% without
Individual conductive paths are blocked, and for 17%, 7 out of 50 conductive paths are blocked.
The gap d4 is too small and the bent portion 8d of the gasket 8 is
Comes into contact with the outer periphery of the fixed plate 6 and presses the fixed plate 6 downward,
It seems that harmful force was applied to the welding point 7c between the conductive member and the intermediate pressure sensitive plate. On the other hand, according to the present invention, no conductive path is cut off, the cutoff accuracy can be improved, and it is desirable that the gap d4 be 20% or more of the thickness d1 of the bottom portion 8e. confirmed.

【００５５】次に本発明の実施の第５形態について説明
すると、前述した図８、９に示すように固定板６の上面
に浅い凹部６ｂを設けるとともに、図５及び図６（ａ）
の平面図、同図（ｂ）の要部断面図に示すように凹部６
ｂの内周部に係合可能な下方突部５ｂを中間感圧板５に
設けている。具体的には、図６（ａ）、（ｂ）に示すよ
うに、下方突部５ｂは中間感圧板５の所定半径の円周上
に所定間隔で５箇所形成されており、その形状は縦断面
が円弧状であって平面形状としては所定の中心角で所定
の幅を持った円弧状帯に形成されている。また、下方突
部５ｂの下端が平面部分から突出する深さについては固
定板６の凹部６ｂの深さと一致させるとともに、下方突
部５ｂの下面側の外周端部を固定板６の凹部６ｂの外周
端部と一致させることにより、組み立てると図５に示す
ように、下方突部５ｂの下端が固定板６の凹部６ｂに接
触するとともに下方突部５ｂの外周端部が凹部６ｂの外
周端部と当接してこれら下方突部５ｂと凹部６ｂとがし
っかり嵌合するようにする。本形態において以上説明し
た事項以外については、基本的に前述した図７（ａ）に
示す電池と同じであり、それら同一部分については同一
の符号を付しその説明は省略する。Next, a fifth embodiment of the present invention will be described. As shown in FIGS. 8 and 9 described above, a shallow recess 6b is provided on the upper surface of the fixed plate 6, and FIGS.
Of the concave portion 6 as shown in the plan view of FIG.
The intermediate pressure-sensitive plate 5 is provided with a lower protrusion 5b that can be engaged with the inner peripheral portion of b. Specifically, as shown in FIGS. 6 (a) and 6 (b), the lower protrusions 5b are formed on the circumference of the intermediate pressure sensitive plate 5 at five positions at predetermined intervals, and the shape thereof is a vertical section. The surface is arcuate, and as a planar shape, it is formed into an arcuate band having a predetermined central angle and a predetermined width. Further, the depth at which the lower end of the lower protrusion 5b projects from the flat portion is made equal to the depth of the recess 6b of the fixed plate 6, and the outer peripheral end portion of the lower protrusion 5b on the lower surface side of the recess 6b of the fixed plate 6 is made. By assembling with the outer peripheral end, the lower end of the lower protrusion 5b contacts the recess 6b of the fixing plate 6 and the outer peripheral end of the lower protrusion 5b contacts the outer peripheral end of the recess 6b as shown in FIG. 5 when assembled. And the lower projection 5b and the recess 6b are fitted firmly. Other than the matters described above in the present embodiment, the battery is basically the same as the battery shown in FIG. 7A described above, and the same portions are denoted by the same reference numerals and the description thereof will be omitted.

【００５６】以上のような構成の固定板６及び中間感圧
板５によって、組立時において固定板６に埋設された導
電部材７と中間感圧板５との溶接を行う際には、これら
凹部６ｂと下方突部５ｂとの係合によってその位置決め
を精度良く行うことができる。このため、固定板６とガ
スケット８の断面Ｌ形屈曲部８ｄとの嵌合が緩い場合で
も、中間感圧板５と導電部材７の溶接のための位置決め
を確実に行える。したがって、ガスケット８の寸法誤差
の影響を受けることなくその位置決めを確実に行えるた
め、両者の溶接を高精度に行え、導電経路の遮断精度を
向上できる。With the fixing plate 6 and the intermediate pressure-sensitive plate 5 having the above-described structure, when the conductive member 7 embedded in the fixing plate 6 and the intermediate pressure-sensitive plate 5 are welded at the time of assembly, these recesses 6b are formed. The positioning of the lower protrusion 5b can be performed accurately by the engagement with the lower protrusion 5b. Therefore, even if the fixed plate 6 and the L-shaped bent portion 8d of the gasket 8 are loosely fitted, the intermediate pressure-sensitive plate 5 and the conductive member 7 can be reliably positioned for welding. Therefore, since the gasket 8 can be reliably positioned without being affected by the dimensional error, the two can be welded with high accuracy and the conductive path cutoff accuracy can be improved.

【００５７】また、前記位置合わせを行うにあたって、
溶接しやすいように固定板６と断面Ｌ形屈曲部８ｄとの
嵌合精度を上げるためガスケット８の断面Ｌ形屈曲部８
ｄの寸法精度に多大な注意を払う必要がなくなり、この
点、部品の生産管理がしやすくなる。Further, in performing the alignment,
In order to improve the fitting accuracy of the fixing plate 6 and the L-shaped bent portion 8d for facilitating welding, the L-shaped bent portion 8 of the gasket 8 has a cross section.
It is not necessary to pay much attention to the dimensional accuracy of d, which facilitates production control of parts.

【００５８】本形態の中間感圧板５にあっては、５箇所
の下方突部５ｂが配設される円周の半径は、薄肉部５ａ
の放射状に広がる直線部分の外端部までの半径とほぼ一
致しているが、このような下方突部５ｂと薄肉部５ａと
の位置関係は適宜変更し得る。In the intermediate pressure-sensitive plate 5 of this embodiment, the radius of the circumference on which the five downward projections 5b are arranged is the thin portion 5a.
Although the radius of the straight line extending to the outer end portion substantially coincides with the radius, the positional relationship between the lower protruding portion 5b and the thin portion 5a can be appropriately changed.

【００５９】以上、説明した本形態の防爆機能を有する
電池について、導電経路の遮断圧力について測定した。
この遮断圧力を測定するにあたり、遮断圧力測定装置と
して、恒温槽、与圧用ポンプ、およびテスターを用意す
る。恒温槽は、その内部に測定用電池を入れておいてそ
の内部温度を一定に保ち、与圧用ポンプは電池内部を所
定の圧力にするものである。この与圧用ポンプからはパ
イプが延出しており、このパイプを通じて圧力を電池内
部に加えることができるようになっている。このパイプ
には圧力ゲージが付設されており、パイプを通じて付与
する圧力を測定できるようになっている。また、テスタ
ーは、これから延出した各測定用端子を測定用電池の端
子板３および導電部材７にそれぞれ接続して、両者間の
導通状態を監視することによって、導電部材７の溶接点
７ｃの周囲が破断して導電経路が遮断されたか否かを確
認するためのものである。With respect to the battery having the explosion-proof function of the present embodiment described above, the breaking pressure of the conductive path was measured.
When measuring the breaking pressure, a constant temperature bath, a pressurizing pump, and a tester are prepared as a breaking pressure measuring device. The constant temperature bath has a measuring battery placed therein to keep the internal temperature constant, and the pressurizing pump keeps the inside of the battery at a predetermined pressure. A pipe extends from the pressurizing pump, and pressure can be applied to the inside of the battery through the pipe. A pressure gauge is attached to this pipe so that the pressure applied through the pipe can be measured. In addition, the tester connects each of the measuring terminals extending from this to the terminal plate 3 of the measuring battery and the conductive member 7 respectively, and monitors the conduction state between the two to detect the welding point 7c of the conductive member 7. This is for confirming whether the periphery is broken and the conductive path is blocked.

【００６０】[0060]

【表５】 具体的には、表５に示すように、本形態の電池を本発明
とし、また固定板６や中間感圧板５に位置合わせ用の凹
部や下方突部を設けていない前述した図７（ａ）に示す
電池を比較例とし、これら本発明及び比較例について測
定用にそれぞれ１０個用意した。[Table 5] Specifically, as shown in Table 5, the battery of the present embodiment is used as the present invention, and the fixing plate 6 and the intermediate pressure-sensitive plate 5 are not provided with the concave portion for positioning and the lower protruding portion described above. 10) were prepared for measurement in each of the present invention and the comparative example.

【００６１】そして、前記の遮断圧力測定装置を用い
て、常温でその導電経路の遮断圧力を測定した。詳しく
は、恒温槽内に測定用電池を載置し、その電池ケース１
の底部の挿通孔に与圧用ポンプから延出したパイプを気
密状態で挿入する。そしてテスターからの各測定端子を
電池の端子板３及び導電部材７にそれぞれ接続してお
く。この状態で恒温槽の内部を前記の各雰囲気温度に維
持するとともに、電池内圧を上げていくようにした。Then, the breaking pressure of the conductive path was measured at room temperature using the breaking pressure measuring device. Specifically, the measurement battery is placed in a constant temperature bath, and the battery case 1
The pipe extending from the pressurizing pump is inserted in the insertion hole at the bottom of the airtight state. Then, each measuring terminal from the tester is connected to the terminal plate 3 and the conductive member 7 of the battery, respectively. In this state, the inside of the constant temperature bath was maintained at each of the above ambient temperatures and the internal pressure of the battery was increased.

【００６２】その結果、表５に示すように、比較例につ
いては、圧力１５〜２８Kg/cm 2 の範囲で導電経路が遮
断しており、その分散が４．１とばらついている。ま
た、その平均値が１８Kg/cm 2 と高めである。これに対
して、本発明にあっては、圧力１３〜１６Kg/cm 2 の範
囲で導電経路が遮断し、その分散が１．０とばらつきが
極めて小さくなっており、また、その平均値が１５と望
ましい数値となっている。したがって、本形態にあって
は導電経路の遮断精度が極めて向上していることが確認
できた。As a result, as shown in Table 5, in the comparative example, the conductive path was blocked in the pressure range of 15 to 28 kg / cm 2 , and the dispersion thereof was 4.1. The average value is as high as 18 kg / cm 2 . On the other hand, in the present invention, the conductive path is blocked in the pressure range of 13 to 16 kg / cm 2 , and the dispersion thereof is as small as 1.0, and the average value thereof is 15 And it is a desirable number. Therefore, in this embodiment, it was confirmed that the interruption accuracy of the conductive path was significantly improved.

【００６３】以上説明した第５形態に対して前述した第
１〜４形態を組み合わせることも可能である。即ち、固
定板６の上面に浅い凹部６ｂを設けるとともに、凹部６
ｂの内周部に係合可能な下方突部５ｂを中間感圧板５に
設けた構成に対して、前記第１形態のようにガスケット
８の断面Ｌ形屈曲部８ｄを周方向に所定間隔を置いて設
けたり、前記第２形態のようにガスケット８の垂直壁部
８ｂの肉厚ｄ２を全周に亘って断面Ｃ形湾曲部８ａの底
部８ｅの厚みｄ１より薄くしたり、また前記第３形態の
ようにガスケット８の垂直壁部８ｂの内周面と固定板６
の外周面との間に補強リング１１を介装したり、さらに
ガスケット８の垂直壁部８ｂの内周面と固定板６の外周
面との間に円筒状の空隙ｄ４を設けたりしてもよい。こ
のような組合せの構成によって、導電部材７と中間感圧
板５との溶接を行う際の位置決め精度を向上させること
と、電池ケース１の開口部を内側にかしめてガスケット
８を圧縮する際に導電部材７と中間感圧板５との溶接部
分に有害な力が加わることを確実に防止することとが相
俟って、極めて導電経路の遮断精度が向上し、感圧遮断
機能の信頼性の向上を図るようにすることもできる。こ
のほか、第１〜５形態間で可能な限り組合せの構成を適
宜採用できる。It is also possible to combine the above-mentioned first to fourth forms with the fifth form described above. That is, the shallow recess 6b is provided on the upper surface of the fixed plate 6, and the recess 6
In contrast to the configuration in which the intermediate pressure-sensitive plate 5 is provided with the lower protrusion 5b that can be engaged with the inner peripheral portion of b, the L-shaped cross-section bent portion 8d of the gasket 8 is circumferentially spaced by a predetermined distance as in the first embodiment. It may be provided by placing it, or as in the second embodiment, the wall thickness d2 of the vertical wall portion 8b of the gasket 8 may be made thinner than the thickness d1 of the bottom portion 8e of the C-shaped curved portion 8a over the entire circumference. The inner peripheral surface of the vertical wall portion 8b of the gasket 8 and the fixing plate 6 as in the embodiment.
If a reinforcing ring 11 is provided between the inner peripheral surface of the vertical wall portion 8b of the gasket 8 and the outer peripheral surface of the fixed plate 6, a cylindrical gap d4 may be provided between the inner peripheral surface and the outer peripheral surface of the stationary plate 6. Good. With such a configuration of the combination, the positioning accuracy when welding the conductive member 7 and the intermediate pressure-sensitive plate 5 is improved, and when the gasket 8 is compressed by crimping the opening of the battery case 1 inside, the conductive In combination with surely preventing harmful force from being applied to the welded portion between the member 7 and the intermediate pressure-sensitive plate 5, the cutoff accuracy of the conductive path is extremely improved, and the reliability of the pressure-sensitive cutoff function is improved. It is also possible to plan. In addition, it is possible to appropriately adopt a combination of the first to fifth modes as much as possible.

【００６４】以上説明した第１〜５形態にあっては、感
温抵抗素子４と中間感圧板５との間に金属リング（図示
せず）を介装してもよく、これによって蓋要素全体の強
度をより向上できるが、これを省略して組立性を向上さ
せても良い。また、感温抵抗素子４を廃止して中間感圧
板５の上に直接、端子板３を重ねる構成にすれば、感温
遮断機能の無いタイプの防爆機能となる。In the first to fifth embodiments described above, a metal ring (not shown) may be interposed between the temperature-sensitive resistance element 4 and the intermediate pressure-sensitive plate 5, whereby the entire lid element is provided. The strength can be further improved, but it may be omitted to improve the assemblability. Further, if the temperature sensitive resistance element 4 is eliminated and the terminal plate 3 is directly stacked on the intermediate pressure sensitive plate 5, an explosion proof function of a type without a temperature sensitive cutoff function is provided.

【００６５】なお、前述した第１〜５形態のような円筒
形の電池に限らず、蓋要素の各部品の平面外形を矩形に
することで角形のリチウム二次電池などにも適用でき
る。これら各部品を矩形にすることで成形加工がし易く
なるほか、歩留まりが向上しコストダウンが図れる。The present invention can be applied not only to the cylindrical battery as in the first to fifth embodiments described above, but also to a rectangular lithium secondary battery or the like by making the planar outer shape of each component of the lid element rectangular. By making each of these parts rectangular, the molding process becomes easier, and the yield is improved and the cost is reduced.

【００６６】[0066]

【発明の効果】本発明の請求項１〜４に係る防爆機能を
有する電池にあっては、固定板が下方に押し下げられて
導電部材と中間感圧板との溶接部分に有害な力が加わる
ことを確実に防止できる。このため、導電経路の遮断精
度が向上し、感圧遮断機能の信頼性を向上できる。In the battery having the explosion-proof function according to the first to fourth aspects of the present invention, the fixing plate is pushed down, and harmful force is applied to the welded portion between the conductive member and the intermediate pressure-sensitive plate. Can be reliably prevented. Therefore, the interruption accuracy of the conductive path is improved, and the reliability of the pressure-sensitive interruption function can be improved.

【００６７】また請求項５に係る防爆機能を有する電池
にあっては、ガスケットの寸法誤差の影響を受けること
なく固定板に止着された導電部材と中間感圧板の位置決
めを確実に行えるため、両者の溶接を高精度に行える。
このため、導電経路の遮断精度が向上し、感圧遮断機能
の信頼性を向上できる。また前記位置合わせを行うにあ
たって、ガスケットの寸法精度に多大な注意を払う必要
がなくなり、この点、部品の製造管理がしやすくなり生
産性が向上する。Further, in the battery having the explosion-proof function according to claim 5, since the conductive member fixed to the fixed plate and the intermediate pressure-sensitive plate can be reliably positioned without being affected by the dimensional error of the gasket, Both can be welded with high precision.
Therefore, the interruption accuracy of the conductive path is improved, and the reliability of the pressure-sensitive interruption function can be improved. Further, it is not necessary to pay much attention to the dimensional accuracy of the gasket when performing the alignment, and in this respect, the manufacturing control of parts is facilitated and the productivity is improved.

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

【図１】本発明の実施の第１形態による防爆機能を有す
る電池のガスケットを示しており、（ａ）は平面図、
（ｂ）は縦断面図、（ｃ）は要部縦断面図である。FIG. 1 shows a gasket of a battery having an explosion-proof function according to the first embodiment of the present invention, (a) is a plan view,
(B) is a vertical cross-sectional view, (c) is a vertical cross-sectional view of a main part.

【図２】本発明の実施の第２形態による防爆機能を有す
る電池のガスケットを示しており、（ａ）は平面図、
（ｂ）は縦断面図、（ｃ）は要部縦断面図である。FIG. 2 shows a gasket of a battery having an explosion-proof function according to a second embodiment of the present invention, (a) is a plan view,
(B) is a vertical cross-sectional view, (c) is a vertical cross-sectional view of a main part.

【図３】本発明の実施の第３形態による防爆機能を有す
る電池のガスケットを示しており、（ａ）は平面図、
（ｂ）は縦断面図、（ｃ）は要部縦断面図である。FIG. 3 shows a gasket of a battery having an explosion-proof function according to the third embodiment of the present invention, (a) is a plan view,
(B) is a vertical cross-sectional view, (c) is a vertical cross-sectional view of a main part.

【図４】本発明の実施の第４形態による防爆機能を有す
る電池のガスケットを示しており、（ａ）は平面図、
（ｂ）は縦断面図、（ｃ）は要部縦断面図である。FIG. 4 shows a gasket of a battery having an explosion-proof function according to a fourth embodiment of the present invention, (a) is a plan view,
(B) is a vertical cross-sectional view, (c) is a vertical cross-sectional view of a main part.

【図５】本発明の実施の第５形態による防爆機能を有す
る電池の要部縦断面図である。FIG. 5 is a longitudinal sectional view of an essential part of a battery having an explosion-proof function according to a fifth embodiment of the present invention.

【図６】本発明の実施の第５形態による防爆機能を有す
る電池の中間感圧板を示しており、（ａ）は平面図、
（ｂ）は（ａ）のＡ−Ａ線矢視縦断面図である。FIG. 6 shows an intermediate pressure-sensitive plate of a battery having an explosion-proof function according to a fifth embodiment of the present invention, (a) is a plan view,
(B) is a vertical sectional view taken along the line AA of (a).

【図７】本出願人が既に出願した防爆機能を有する電池
を示しており、（ａ）は要部縦断面図、（ｂ）は（ａ）
の電池において導電経路が遮断された状態を示す要部縦
断面図である。FIG. 7 shows a battery having an explosion-proof function, which the present applicant has already applied, (a) is a vertical cross-sectional view of a main part, and (b) is (a).
FIG. 4 is a vertical cross-sectional view of relevant parts showing a state in which a conductive path is blocked in the battery of FIG.

【図８】本発明の実施の第５形態による防爆機能を有す
る電池における導電部材が埋設された固定板の平面図で
ある。FIG. 8 is a plan view of a fixing plate in which a conductive member is embedded in a battery having an explosion-proof function according to a fifth embodiment of the present invention.

【図９】図９のＢ−Ｂ線矢視縦断面図である。9 is a vertical cross-sectional view taken along the line BB of FIG.

【図１０】従来の防爆機能を有する電池のガスケットを
示しており、（ａ）は平面図、（ｂ）は縦断面図、
（ｃ）は要部縦断面図である。FIG. 10 shows a conventional gasket for a battery having an explosion-proof function, (a) is a plan view, (b) is a vertical sectional view,
(C) is a longitudinal cross-sectional view of a main part.

【図１１】従来の防爆機能を有する電池を示しており、
（ａ）は電池ケース１の封口端部をかしめる前の様子を
示す要部縦断面図、（ｂ）は電池ケース１の封口端部を
かしめた後の様子示す要部縦断面図。FIG. 11 shows a conventional battery having an explosion-proof function,
(A) is a longitudinal cross-sectional view of an essential part showing a state before caulking the sealing end of the battery case 1, and (b) is a longitudinal sectional view of an essential part showing a state after caulking the sealing end of the battery case 1.

【符号の説明】[Explanation of symbols]

１ 電池ケース １ａ 段部 ２ リードタブ ３ 端子板 ３ａ ガス抜き孔 ４ 感温抵抗素子 ５ 中間感圧板 ５ａ 薄肉部 ５ｂ 下方突部 ６ 固定板 ６ａ ガス透過孔 ６ｂ 凹部 ７ 導電部材 ７ａ 突部 ７ｂ 鍔部 ７ｃ 溶接点 ８ ガスケット ８ａ 断面Ｃ形湾曲部 ８ｂ 垂直壁部 ８ｃ 水平壁部 ８ｄ 断面Ｌ形屈曲部 ８ｅ 底部 １１ 補強リング ｄ４ 空隙 1 Battery Case 1a Step 2 Lead Tab 3 Terminal Plate 3a Gas Release Hole 4 Temperature Sensitive Resistance Element 5 Intermediate Pressure Sensing Plate 5a Thin Wall 5b Lower Projection 6 Fixing Plate 6a Gas Permeation Hole 6b Recess 7 Conductive Member 7a Projection 7b Collar 7c Welding point 8 Gasket 8a Cross-section C-shaped curved part 8b Vertical wall part 8c Horizontal wall part 8d Cross-section L-shaped bent part 8e Bottom part 11 Reinforcement ring d4 Void

───────────────────────────────────────────────────── フロントページの続き (72)発明者 北方 雅一 東京都港区新橋５丁目36番11号 富士電気 化学株式会社内 (72)発明者 村田 知也 東京都港区新橋５丁目36番11号 富士電気 化学株式会社内 (72)発明者 西尾 昌武 東京都港区新橋５丁目36番11号 富士電気 化学株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masakazu Kitakata 5-36-1 Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (72) Inventor Tomoya Murata 5-36-11 Shinbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (72) Inventor Masatake Nishio 5-36-11 Shinbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd.

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 有底筒形の電池ケース（１）と、この電
池ケース（１）に収納された発電要素と、該発電要素の
一方の電極に接続されたリードタブ（２）と、該リード
タブ（２）と電気的に接続され該電池ケース（１）の開
口部を絶縁性の筒状ガスケット（８）を介して塞ぐ蓋要
素とからなり、該蓋要素はガス抜き孔を有する金属製の
端子板（３）と可撓性を有し破断しやすい中間感圧板
（５）とガス透過孔（６ａ）を有する絶縁性の固定板
（６）とを順次積層するとともにこれらの外周部を筒状
の該ガスケット（８）で包被し、該リードタブ（２）の
先端部を該固定板（６）に止着された導電部材（７）に
接続するとともに該導電部材（７）を該中間感圧板
（５）に溶接してなる防爆機能を有する電池において、
該固定板（６）は該中間感圧板（５）よりも小径にして
その周縁部が肉厚に形成されてなり、該ガスケット
（８）は積層された該端子板（３）と該中間感圧板
（５）の外周部を囲繞してなる断面Ｃ形湾曲部（８ａ）
の下方部が該固定板（６）の外周部を抱持する断面Ｌ形
屈曲部（８ｄ）に一体的に連接してなり、該断面Ｌ形屈
曲部（８ｄ）が周方向に間隔を置いて所定間隔で形成さ
れてなることを特徴とする防爆機能を有する電池。1. A bottomed tubular battery case (1), a power generating element housed in the battery case (1), a lead tab (2) connected to one electrode of the power generating element, and the lead tab. (2) A lid element that is electrically connected to the battery case (1) and closes the opening of the battery case (1) through an insulating tubular gasket (8), the lid element being made of metal having a gas vent hole. A terminal plate (3), an intermediate pressure-sensitive plate (5) which is flexible and easy to break, and an insulating fixing plate (6) having a gas permeation hole (6a) are sequentially laminated, and their outer peripheral portions are cylindrical. Of the lead tab (2) is covered with the gasket (8) and is connected to a conductive member (7) fixed to the fixing plate (6), and the conductive member (7) is connected to the intermediate portion. In a battery having an explosion-proof function, which is welded to the pressure-sensitive plate (5),
The fixing plate (6) has a diameter smaller than that of the intermediate pressure-sensitive plate (5) and has a thick peripheral edge portion, and the gasket (8) and the intermediate plate are laminated with the intermediate plate. Bending section (8a) having a C-shaped section surrounding the outer periphery of the pressure plate (5)
Is integrally connected to a bent portion (8d) having an L-shaped cross section which holds the outer peripheral portion of the fixing plate (6), and the bent portion (8d) having an L-shaped cross section is circumferentially spaced. A battery having an explosion-proof function, characterized in that it is formed at predetermined intervals. 【請求項２】 有底筒形の電池ケース（１）と、この電
池ケース（１）に収納された発電要素と、該発電要素の
一方の電極に接続されたリードタブ（２）と、該リード
タブ（２）と電気的に接続され該電池ケース（１）の開
口部を絶縁性の筒状ガスケット（８）を介して塞ぐ蓋要
素とからなり、該蓋要素はガス抜き孔を有する金属製の
端子板（３）と可撓性を有し破断しやすい中間感圧板
（５）とガス透過孔（６ａ）を有する絶縁性の固定板
（６）とを順次積層するとともにこれらの外周部を筒状
の該ガスケット（８）で包被し、該リードタブ（２）の
先端部を該固定板（６）に止着された導電部材（７）に
接続するとともに該導電部材（７）を該中間感圧板
（５）に溶接してなる防爆機能を有する電池において、
該固定板（６）は該中間感圧板（５）よりも小径にして
その周縁部が肉厚に形成されてなり、該ガスケット
（８）は積層された該端子板（３）と該中間感圧板
（５）の外周部を囲繞してなる断面Ｃ形湾曲部（８ａ）
の下方部が該固定板の外周部を抱持する垂直壁部（８
ｂ）と水平壁部（８ｃ）とからなる断面Ｌ形屈曲部（８
ｄ）に一体的に連接してなり、該ガスケット（８）の該
垂直壁部（８ｂ）の肉厚を該断面Ｃ形湾曲部（８ａ）の
底部（８ｅ）の厚みの１５〜７０％の範囲としてなるこ
とを特徴とする防爆機能を有する電池。2. A bottomed cylindrical battery case (1), a power generation element housed in the battery case (1), a lead tab (2) connected to one electrode of the power generation element, and the lead tab. (2) A lid element that is electrically connected to the battery case (1) and closes the opening of the battery case (1) through an insulating tubular gasket (8), the lid element being made of metal having a gas vent hole. A terminal plate (3), an intermediate pressure-sensitive plate (5) which is flexible and easy to break, and an insulating fixing plate (6) having a gas permeation hole (6a) are sequentially laminated, and their outer peripheral portions are cylindrical. Of the lead tab (2) is covered with the gasket (8) and is connected to a conductive member (7) fixed to the fixing plate (6), and the conductive member (7) is connected to the intermediate portion. In a battery having an explosion-proof function, which is welded to the pressure-sensitive plate (5),
The fixing plate (6) has a diameter smaller than that of the intermediate pressure-sensitive plate (5) and has a thick peripheral edge portion, and the gasket (8) and the intermediate plate are laminated with the intermediate plate. Bending section (8a) having a C-shaped section surrounding the outer periphery of the pressure plate (5)
The lower part of the vertical wall part (8) that holds the outer peripheral part of the fixing plate.
b) and a horizontal wall portion (8c) having an L-shaped cross section (8)
d) integrally connected to the gasket, and the wall thickness of the vertical wall portion (8b) of the gasket (8) is 15 to 70% of the thickness of the bottom portion (8e) of the C-shaped curved portion (8a) in cross section. A battery having an explosion-proof function, characterized by having a range. 【請求項３】 有底筒形の電池ケース（１）と、この電
池ケース（１）に収納された発電要素と、該発電要素の
一方の電極に接続されたリードタブ（２）と、該リード
タブ（２）と電気的に接続され該電池ケース（１）の開
口部を絶縁性の筒状ガスケット（８）を介して塞ぐ蓋要
素とからなり、該蓋要素はガス抜き孔を有する金属製の
端子板（３）と可撓性を有し破断しやすい中間感圧板
（５）とガス透過孔（６ａ）を有する絶縁性の固定板
（６）とを順次積層するとともにこれらの外周部を筒状
の該ガスケット（８）で包被し、該リードタブ（２）の
先端部を該固定板（６）に止着された導電部材（７）に
接続するとともに該導電部材（７）を該中間感圧板
（５）に溶接してなる防爆機能を有する電池において、
該固定板（６）は該中間感圧板（５）よりも小径にして
その周縁部が肉厚に形成されてなり、該ガスケット
（８）は積層された該端子板（３）と該中間感圧板
（５）の外周部を囲繞してなる断面Ｃ形湾曲部（８ａ）
の下方部が該固定板の外周部を抱持する垂直壁部（８
ｂ）と水平壁部（８ｃ）とからなる断面Ｌ形屈曲部（８
ｄ）に一体的に連接してなり、該ガスケット（８）の該
垂直壁部（８ｂ）の内周面と該固定板（６）の外周面と
の間に補強リング（１１）を介装してなることを特徴と
する防爆機能を有する電池。3. A bottomed tubular battery case (1), a power generating element housed in the battery case (1), a lead tab (2) connected to one electrode of the power generating element, and the lead tab. (2) A lid element that is electrically connected to the battery case (1) and closes the opening of the battery case (1) through an insulating tubular gasket (8), the lid element being made of metal having a gas vent hole. A terminal plate (3), an intermediate pressure-sensitive plate (5) which is flexible and easy to break, and an insulating fixing plate (6) having a gas permeation hole (6a) are sequentially laminated, and their outer peripheral portions are cylindrical. Of the lead tab (2) is covered with the gasket (8) and is connected to a conductive member (7) fixed to the fixing plate (6), and the conductive member (7) is connected to the intermediate portion. In a battery having an explosion-proof function, which is welded to the pressure-sensitive plate (5),
The fixing plate (6) has a diameter smaller than that of the intermediate pressure-sensitive plate (5) and has a thick peripheral edge portion, and the gasket (8) and the intermediate plate are laminated with the intermediate plate. Bending section (8a) having a C-shaped section surrounding the outer periphery of the pressure plate (5)
The lower part of the vertical wall part (8) that holds the outer peripheral part of the fixing plate.
b) and a horizontal wall portion (8c) having an L-shaped cross section (8)
d) is integrally connected to the gasket, and a reinforcing ring (11) is interposed between the inner peripheral surface of the vertical wall portion (8b) of the gasket (8) and the outer peripheral surface of the fixing plate (6). A battery having an explosion-proof function, characterized in that 【請求項４】 有底筒形の電池ケース（１）と、この電
池ケース（１）に収納された発電要素と、該発電要素の
一方の電極に接続されたリードタブ（２）と、該リード
タブ（２）と電気的に接続され該電池ケース（１）の開
口部を絶縁性の筒状ガスケット（８）を介して塞ぐ蓋要
素とからなり、該蓋要素はガス抜き孔を有する金属製の
端子板（３）と可撓性を有し破断しやすい中間感圧板
（５）とガス透過孔（６ａ）を有する絶縁性の固定板
（６）とを順次積層するとともにこれらの外周部を筒状
の該ガスケット（８）で包被し、該リードタブ（２）の
先端部を該固定板（６）に止着された導電部材（７）に
接続するとともに該導電部材（７）を該中間感圧板
（５）に溶接してなる防爆機能を有する電池において、
該固定板（６）は該中間感圧板（５）よりも小径にして
その周縁部が肉厚に形成されてなり、該ガスケット
（８）は積層された該端子板（３）と該中間感圧板
（５）の外周部を囲繞してなる断面Ｃ形湾曲部（８ａ）
の下方部が該固定板の外周部を抱持する垂直壁部（８
ｂ）と水平壁部（８ｃ）とからなる断面Ｌ形屈曲部（８
ｄ）に一体的に連接してなり、該ガスケット（８）の該
垂直壁部（８ｂ）の内周面と該固定板（６）の外周面と
の間に該断面Ｃ形湾曲部（８ａ）の底部（８ｅ）の厚み
の２０％以上の間隔の空隙（ｄ４）を設けてなることを
特徴とする防爆機能を有する電池。4. A bottomed cylindrical battery case (1), a power generating element housed in the battery case (1), a lead tab (2) connected to one electrode of the power generating element, and the lead tab. (2) A lid element that is electrically connected to the battery case (1) and closes the opening of the battery case (1) through an insulating tubular gasket (8), the lid element being made of metal having a gas vent hole. A terminal plate (3), an intermediate pressure-sensitive plate (5) which is flexible and easy to break, and an insulating fixing plate (6) having a gas permeation hole (6a) are sequentially laminated, and their outer peripheral portions are cylindrical. Of the lead tab (2) is covered with the gasket (8) and is connected to a conductive member (7) fixed to the fixing plate (6), and the conductive member (7) is connected to the intermediate portion. In a battery having an explosion-proof function, which is welded to the pressure-sensitive plate (5),
The fixing plate (6) has a diameter smaller than that of the intermediate pressure-sensitive plate (5) and has a thick peripheral edge portion, and the gasket (8) and the intermediate plate are laminated with the intermediate plate. Bending section (8a) having a C-shaped section surrounding the outer periphery of the pressure plate (5)
The lower part of the vertical wall part (8) that holds the outer peripheral part of the fixing plate.
b) and a horizontal wall portion (8c) having an L-shaped cross section (8)
d) is integrally connected to the vertical wall portion (8b) of the gasket (8) and the outer peripheral surface of the fixing plate (6) and has a C-shaped curved section (8a). Battery having an explosion-proof function, characterized in that voids (d4) are provided at intervals of 20% or more of the thickness of the bottom portion (8e). 【請求項５】 有底筒形の電池ケース（１）と、この電
池ケース（１）に収納された発電要素と、該発電要素の
一方の電極に接続されたリードタブ（２）と、該リード
タブ（２）と電気的に接続され該電池ケース（１）の開
口部を絶縁性の筒状ガスケット（８）を介して塞ぐ蓋要
素とからなり、該蓋要素はガス抜き孔を有する金属製の
端子板（３）と可撓性を有し破断しやすい中間感圧板
（５）とガス透過孔（６ａ）を有する絶縁性の固定板
（６）とを順次積層するとともにこれらの外周部を筒状
の該ガスケット（８）で包被し、該リードタブ（２）の
先端部を該固定板（６）に止着された導電部材（７）に
接続するとともに該導電部材（７）を該中間感圧板
（５）に溶接してなる防爆機能を有する電池において、
該固定板（６）の上面に浅い凹部（６ｂ）を設けるとと
もに、該凹部（６ｂ）の内周部に係合可能な下方突部
（５ｂ）を該中間感圧板（５）に設けてなることを特徴
とする防爆機能を有する電池。5. A battery case (1) having a bottomed cylindrical shape, a power generating element housed in the battery case (1), a lead tab (2) connected to one electrode of the power generating element, and the lead tab. (2) A lid element that is electrically connected to the battery case (1) and closes the opening of the battery case (1) through an insulating tubular gasket (8), the lid element being made of metal having a gas vent hole. A terminal plate (3), an intermediate pressure-sensitive plate (5) which is flexible and easy to break, and an insulating fixing plate (6) having a gas permeation hole (6a) are sequentially laminated, and their outer peripheral portions are cylindrical. Of the lead tab (2) is covered with the gasket (8) and is connected to a conductive member (7) fixed to the fixing plate (6), and the conductive member (7) is connected to the intermediate portion. In a battery having an explosion-proof function, which is welded to the pressure-sensitive plate (5),
A shallow recess (6b) is provided on the upper surface of the fixing plate (6), and a lower protrusion (5b) engageable with the inner peripheral portion of the recess (6b) is provided on the intermediate pressure-sensitive plate (5). A battery having an explosion-proof function, which is characterized in that
JP04763496A 1996-03-05 1996-03-05 Batteries with explosion-proof function Expired - Fee Related JP3652000B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP04763496A JP3652000B2 (en) 1996-03-05 1996-03-05 Batteries with explosion-proof function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04763496A JP3652000B2 (en) 1996-03-05 1996-03-05 Batteries with explosion-proof function

Publications (2)

Publication Number Publication Date
JPH09245757A true JPH09245757A (en) 1997-09-19
JP3652000B2 JP3652000B2 (en) 2005-05-25

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ID=12780671

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008027668A (en) * 2006-07-19 2008-02-07 Sony Corp Battery
CN103907220A (en) * 2011-12-26 2014-07-02 株式会社Lg化学 Cap assembly having improved manufacturing processability and cylindrical battery comprising same
JP2014132552A (en) * 2013-01-03 2014-07-17 Samsung Sdi Co Ltd Secondary battery

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101767347B1 (en) * 2016-12-06 2017-08-23 전천석 Cap assembly for secondary battery

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JPS423858Y1 (en) * 1965-03-29 1967-03-06
JPS423859Y1 (en) * 1965-03-29 1967-03-06
JPS54144222U (en) * 1978-03-31 1979-10-06
JPH0249064U (en) * 1988-09-29 1990-04-05
JPH02112151A (en) * 1988-10-21 1990-04-24 Sony Corp Explosion-proof sealed battery
JPH056689U (en) * 1991-06-27 1993-01-29 富士電気化学株式会社 Cylindrical lithium battery

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JPS423858Y1 (en) * 1965-03-29 1967-03-06
JPS423859Y1 (en) * 1965-03-29 1967-03-06
JPS54144222U (en) * 1978-03-31 1979-10-06
JPH0249064U (en) * 1988-09-29 1990-04-05
JPH02112151A (en) * 1988-10-21 1990-04-24 Sony Corp Explosion-proof sealed battery
JPH056689U (en) * 1991-06-27 1993-01-29 富士電気化学株式会社 Cylindrical lithium battery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008027668A (en) * 2006-07-19 2008-02-07 Sony Corp Battery
CN103907220A (en) * 2011-12-26 2014-07-02 株式会社Lg化学 Cap assembly having improved manufacturing processability and cylindrical battery comprising same
JP2014531128A (en) * 2011-12-26 2014-11-20 エルジー・ケム・リミテッド Cap assembly with improved manufacturing process and cylindrical battery including the same
JP2014132552A (en) * 2013-01-03 2014-07-17 Samsung Sdi Co Ltd Secondary battery

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