JPH07235288A - Battery with explosion preventing safety device and its manufacture - Google Patents
Battery with explosion preventing safety device and its manufactureInfo
- Publication number
- JPH07235288A JPH07235288A JP6143205A JP14320594A JPH07235288A JP H07235288 A JPH07235288 A JP H07235288A JP 6143205 A JP6143205 A JP 6143205A JP 14320594 A JP14320594 A JP 14320594A JP H07235288 A JPH07235288 A JP H07235288A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- intermediate pressure
- sensitive
- terminal plate
- insulating ring
- 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
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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、防爆安全装置を備え
た電池とその製造方法に関し、特に、円筒形リチウムイ
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 provided with an explosion-proof safety device and a method for manufacturing the battery, and more particularly to a technique for high energy density batteries such as a cylindrical lithium ion secondary battery.
【０００２】[0002]
【従来の技術】電池に一体的に組み込まれる防爆安全装
置としては、安全弁、感圧遮断回路、感温遮断回
路がある。安全弁は、電池ケース内の圧力が異常上昇し
た時に作動し、電池内のガスを安全に外部に放出して爆
発を防ぐ。感圧遮断回路は、電池ケース内の圧力が異常
上昇した時に作動し、充電電流又は放電電流を電池内部
で遮断し、異常充電、又は異常放電が継続するのを防
ぐ。感温遮断回路は、電池内部の温度が異常上昇したの
に感応し、電池の内部抵抗を急上昇させて充電電流、又
は放電電流を絞り、異常充電、又は異常放電が継続する
のを防ぐ。2. Description of the Related Art Explosion-proof safety devices integrated into a battery include a safety valve, a pressure-sensitive cutoff circuit, and a temperature-sensitive cutoff circuit. The safety valve operates when the pressure inside the battery case rises abnormally, and safely releases the gas inside the battery to the outside to prevent an explosion. The pressure-sensitive cutoff circuit operates when the pressure inside the battery case rises abnormally, cuts off the charging current or the discharging current inside the battery, and prevents the abnormal charging or the abnormal discharge from continuing. The temperature-sensitive cutoff circuit is responsive to an abnormal temperature rise in the battery and rapidly increases the internal resistance of the battery to throttle the charging current or discharging current to prevent the abnormal charging or abnormal discharging from continuing.
【０００３】最近の円筒形リチウムイオン二次電池の多
くは、安全弁を備えているとともに、感圧遮断回路と感
温遮断回路の一方または両方を備えており、短絡や過充
電などの異常な状態になったとき、遮断回路が作動して
充電、又は放電を停止させるとともに安全弁が作動する
ように設計している。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安全装置
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 the recent cylindrical lithium ion secondary batteries are equipped with a safety valve and also with one or both of a pressure-sensitive cutoff circuit and a temperature-sensitive cutoff circuit, which causes an abnormal state such as a short circuit or overcharge. When it becomes, the shut-off circuit is activated to stop charging or discharging and the safety valve is activated. What is extremely important in designing this type of battery is to realize a highly accurate and reliable explosion-proof safety device with a structure that is as compact as possible and has high mass productivity, and is extremely inexpensive as an auxiliary function of the battery. It is to do something.
【０００４】安全弁と感圧遮断回路を備えた電池の代表
的な構造が特開平２−２８８０６３号に示されている。
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、安全弁と感圧遮
断回路は蓋要素に一体的に組み込まれている。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安全に放出され
る。これが安全弁の機能である。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凸部に溶接されている。
電池の内圧が異常上昇すると、中間感圧板が外側に膨ら
むように変形するが、リードタブの位置は絶縁板で規制
されているので、リードタブと中間感圧板との溶接が外
れ、外部端子板につながる充電、又は放電電流回路が遮
断される。これが感圧遮断回路の機能である。A typical structure of a battery provided with a safety valve and a pressure-sensitive cutoff circuit is shown in Japanese Patent Laid-Open No. 288063.
This battery is basically composed of a cylindrical metal battery case with a bottom, a power generation element housed in the battery case, and a lid element that closes the opening of the battery case. Are integrated 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 increases, the intermediate pressure-sensitive plate bends outward, and when it exceeds the set pressure, the intermediate pressure-sensitive plate breaks, and gas is safely released from the gas vent hole of the external terminal board. To be done. This is the function of the safety valve. A lead tab connected to one electrode of the power generating element is welded to a central convex portion of the intermediate pressure sensitive plate through a small hole in the center of the insulating plate.
When the internal pressure of the battery rises abnormally, the intermediate pressure-sensitive plate deforms so as to bulge outward, but the position of the lead tab is regulated by the insulating plate, so the welding between the lead tab and the intermediate pressure-sensitive plate is removed, and it is connected to the external terminal plate. The charge or discharge current circuit is cut off. This is the function of the pressure-sensitive cutoff circuit.
【０００５】[0005]
【発明が解決しようとする課題】前述した特開平２−２
８８０６３号においては、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。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In No. 88063, the intermediate pressure-sensitive plate and the insulating plate, which are the components of the lid element, are temporarily assembled by an intermediate fitting body to facilitate the ultrasonic welding process of the lead tab and the intermediate pressure-sensitive plate, and to further improve the accuracy of the lid. It is designed to facilitate the assembly of the elements and the attachment to the battery case. But,
For the following reasons, mass productivity and assembly accuracy are not sufficient.
【０００６】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。また、中間感圧板の中央凸部を絶縁板の***にはめ
込み、***ごしに凸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。そのため最終
的に溶接強度がばらつき、感圧遮断回路の動作精度およ
び信頼性が低下する。First, there is a problem that the process of welding the lead tab to the intermediate pressure-sensitive plate and then assembling the lid element 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. Further, the work itself of fitting the central convex portion of the intermediate pressure sensitive plate into the small hole of the insulating plate and welding the lead tab to the convex portion through the small hole itself is troublesome, and it is difficult to improve accuracy. As a result, the welding strength eventually fluctuates, and the operating accuracy and reliability of the pressure-sensitive cutoff circuit deteriorate.
【０００７】この発明は前述した従来の問題点に鑑みな
されたもので、その目的は、防爆安全装置の動作精度お
よび信頼性を高めるとともに、防爆安全装置を備えた電
池の組立性および量産性を高めることにある。The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to improve the operation accuracy and reliability of the explosion-proof safety device, and to improve the assemblability and mass productivity of a battery equipped with the explosion-proof safety device. To raise.
【０００８】[0008]
【課題を解決するための手段】この発明の防爆安全装置
を備えた電池は、有底円筒形の金属製電池ケースと、こ
の電池ケースに収納された発電要素と、前記電池ケース
の開口部を塞ぐ蓋要素とからなる。前記蓋要素は、外部
端子板と、中間感圧板と、内部端子板と、絶縁リング
と、封口ガスケットとを有し、前記外部端子板および前
記内部端子板は、剛性の比較的大きな金属板からなり、
その外形は円形であり、中間部分にガス抜き穴が形成さ
れており、前記中間感圧板は、撓みやすくて破断しやす
い薄い金属板からなる。前記中間感圧板の下面側に前記
絶縁リングを挟み込んだ状態で前記内部端子板が組み合
わされ、前記中間感圧板と前記内部端子板の少なくとも
一方の中央部分に形成された凸部で両者が接触し、その
接触部分で両者が局部的に溶接されており、前記中間感
圧板の上面側に前記外部端子板が重ね合わされ、これら
外部端子板・中間感圧板・絶縁リング・内部端子板がリ
ング形の前記封口ガスケットの内周にはめ込まれること
で一体的な前記蓋要素が構成されている。前記発電要素
の一方の電極に接続されているリードタブの先端が前記
内部端子板の下面に溶接され、一体的な前記蓋要素が前
記電池ケースの開口部分の内周にはめ込まれ、前記電池
ケースの開口部分が内側にかしめられることで前記封口
ガスケットが圧縮されて、前記電池ケースが密封されて
いる。A battery provided with an explosion-proof safety device of the present invention comprises a cylindrical metal battery case having a bottom, a power generating element housed in the battery case, and an opening of the battery case. It consists of a closing element. The lid element includes an external terminal plate, an intermediate pressure-sensitive plate, an internal terminal plate, an insulating ring, and a sealing gasket, and the external terminal plate and the internal terminal plate are made of a metal plate having a relatively large rigidity. Becomes
The outer shape is circular, a gas vent hole is formed in the middle portion, and the intermediate pressure-sensitive plate is made of a thin metal plate that is easily bent and easily broken. The internal terminal plate is assembled in a state where the insulating ring is sandwiched on the lower surface side of the intermediate pressure-sensitive plate, and the intermediate pressure-sensitive plate and the internal terminal plate are brought into contact with each other by a convex portion formed in at least one central portion thereof. , The two are locally welded at the contact portion, the external terminal plate is superposed on the upper surface side of the intermediate pressure-sensitive plate, and the external terminal plate, the intermediate pressure-sensitive plate, the insulating ring, and the internal terminal plate are ring-shaped. The lid element is integrated by being fitted into the inner periphery of the sealing gasket. The tip of the lead tab connected to one electrode of the power generating element is welded to the lower surface of the internal terminal plate, and the integral lid element is fitted into the inner periphery of the opening of the battery case, By crimping the opening portion inward, the sealing gasket is compressed and the battery case is sealed.
【０００９】この構成において、前記中間感圧板は円板
部の外周に短い円筒部が連続した浅いカップ型に形成し
ておき、前記中間感圧板の上面側に前記円筒部内にはめ
込んだ状態で前記外部端子板を重ね合わせ、前記円筒部
を内側にかしめ付けることで両者を一体化することがで
きる。In this structure, the intermediate pressure-sensitive plate is formed in a shallow cup shape in which a short cylindrical portion is continuously formed on the outer circumference of the disc portion, and the intermediate pressure-sensitive plate is fitted in the cylindrical portion on the upper surface side of the intermediate pressure-sensitive plate. Both can be integrated by stacking the external terminal plates and caulking the cylindrical portion inside.
【００１０】この発明の製造方法では、前記中間感圧板
の下面側に前記絶縁リングを挟み込んだ状態で前記内部
端子板を組み合わせ、その状態で前記中間感圧板と前記
内部端子板とをその中央部分で局部的に溶接し、その
後、前記中間感圧板の上面側の前記円筒部内にはめ込む
ように前記外部端子板を重ね合わせ、前記円筒部を内側
にかしめることで両者を一体化し、これら外部端子板・
中間感圧板・絶縁リング・内部端子板をリング形の前記
封口ガスケットの内周にはめ込むことで一体的な前記蓋
要素を構成し、その後、前記リードタブの先端を前記内
部端子板の下面側に溶接する。In the manufacturing method of the present invention, the internal terminal plate is assembled with the insulating ring sandwiched on the lower surface side of the intermediate pressure-sensitive plate, and in the state, the intermediate pressure-sensitive plate and the internal terminal plate are provided at the central portion thereof. Then, the external terminal plates are superposed so as to fit in the cylindrical portion on the upper surface side of the intermediate pressure-sensitive plate, and the cylindrical portion is caulked inward to integrate the two, and these external terminals Board
The intermediate pressure sensitive plate, the insulating ring, and the internal terminal plate are fitted into the inner periphery of the ring-shaped sealing gasket to form the integral lid element, and then the tip of the lead tab is welded to the lower surface side of the internal terminal plate. To do.
【００１１】また、防爆安全装置に感温遮断回路の機能
を負荷する場合は、前記中間感圧板と前記外部端子板と
の間に、ドーナツ板形に形成された正特性の感温抵抗素
子および第２の絶縁リングを挟み込み、この抵抗素子を
介して前記中間感圧板と前記外部端子板とを電気的に接
続する。When the explosion-proof safety device is loaded with the function of the temperature-sensitive cutoff circuit, a temperature-sensitive resistance element having a positive characteristic formed in a donut plate shape between the intermediate pressure-sensitive plate and the external terminal plate, and The second insulating ring is sandwiched, and the intermediate pressure-sensitive plate and the external terminal plate are electrically connected via the resistance element.
【００１２】[0012]
【作用】電池ケース内の圧力は前記内部端子板のガス抜
き穴を通じて前記中間感圧板に作用する。内圧が異常上
昇すると、前記中間感圧板が外側へ膨らむように変形
し、中間感圧板と内部端子板との溶接点が剥がれ、外部
端子板につながる充電、又は放電電流回路が遮断される
（感圧遮断回路）。中間感圧板がさらに大きく変形する
とついには破断し、ケース内のガスが安全に外部に放出
される（安全弁）。また前記感温抵抗素子を付加したも
のでは、電池の温度が異常上昇すると、外部端子板につ
ながる充電、又は放電電流回路中に挿入されている感温
抵抗素子の抵抗値が増大し、充電又は放電電流を減少さ
せる（感温遮断回路）。The pressure inside the battery case acts on the intermediate pressure sensitive plate through the gas vent hole of the internal terminal plate. When the internal pressure rises abnormally, the intermediate pressure-sensitive plate is deformed so as to bulge outward, the welding point between the intermediate pressure-sensitive plate and the internal terminal plate is peeled off, and the charging or discharging current circuit connected to the external terminal plate is cut off (sensation). Pressure cutoff circuit). If the intermediate pressure-sensitive plate is further deformed, it will eventually break, and the gas in the case will be safely released to the outside (safety valve). Further, in the case where the temperature-sensitive resistance element is added, when the temperature of the battery abnormally rises, the resistance value of the temperature-sensitive resistance element inserted in the charging or discharging current circuit increases, and the charging or discharging Reduce the discharge current (temperature-sensitive cutoff circuit).
【００１３】[0013]
【実施例】この発明の一実施例による防爆安全装置（感
温遮断回路を含む）を備えた電池の構造を図１に示し、
その要部の組立工程を図２に示している。この電池の基
本構成は、有底円筒形の金属製電池ケース１と、この電
池ケース１に収納された発電要素２と、電池ケース１の
開口部を塞ぐ蓋要素とからなる。FIG. 1 shows the structure of a battery provided with an explosion-proof safety device (including a temperature-sensitive cutoff circuit) according to an embodiment of the present invention.
FIG. 2 shows the assembly process of the main part. The basic configuration of this battery comprises a bottomed cylindrical metal battery case 1, a power generating element 2 housed in the battery case 1, and a lid element that closes the opening of the battery case 1.
【００１４】蓋要素は、外部端子板３と、中間感圧板４
と、内部端子板５と、絶縁リング６と、封口ガスケット
７とを有する。外部端子板３および内部端子板５は、剛
性の比較的大きな金属板からなり、その外形は円形であ
り、中間部分にガス抜き穴が形成されている。外部端子
板３の中央部は上に向けて凸になっており、内部端子板
５の中央部分が下に向けてわずかに凸になっている。感
温抵抗素子９はドーナツ板形に形成された正特性の素子
である。The lid element includes an external terminal board 3 and an intermediate pressure sensitive board 4.
It has an internal terminal board 5, an insulating ring 6, and a sealing gasket 7. The external terminal plate 3 and the internal terminal plate 5 are made of a metal plate having a relatively large rigidity, their outer shapes are circular, and a gas vent hole is formed in the middle portion. The central part of the external terminal board 3 is convex upward, and the central part of the internal terminal board 5 is convex slightly downward. The temperature-sensitive resistance element 9 is a positive-character element formed in a donut plate shape.
【００１５】中間感圧板４は、撓みやすくて破断しやす
い薄い金属板からなり、図２に示すように、円板部４ａ
の外周に短い円筒部４ｂが連続した浅いカップ型に形成
されているとともに、その中央部には小さな下向きの凸
部４ｃが形成されている。この中間感圧板４の円筒部４
ｂの下面に絶縁リング６を挟み込んだ状態で内部端子板
５が組み合わされ、中間感圧板４の中央の凸部４ｃで両
者が接触し、その接触部分で両者が局部的に溶接されて
いる。また、中間感圧板４の上面側の円筒部４ｂ内には
め込まれた状態で外部端子板３が第２の絶縁リング１０
および感温抵抗素子９を介して重ね合わされ、円筒部４
ｂが内側にかしめられることでこれらが一体化されてい
る。The intermediate pressure-sensitive plate 4 is made of a thin metal plate which is easily bent and easily broken, and as shown in FIG.
A short cylindrical portion 4b is formed in a continuous shallow cup shape on the outer periphery of the, and a small downward convex portion 4c is formed in the center thereof. The cylindrical portion 4 of the intermediate pressure sensitive plate 4
The inner terminal plate 5 is assembled with the insulating ring 6 sandwiched on the lower surface of b, and the two are brought into contact with each other at the central convex portion 4c of the intermediate pressure-sensitive plate 4, and the two are locally welded at the contact portion. In addition, the external terminal plate 3 is inserted into the cylindrical portion 4b on the upper surface side of the intermediate pressure-sensitive plate 4, and the external terminal plate 3 is attached to the second insulating ring 10.
And the temperature sensitive resistance element 9 and the cylindrical portion 4
These are integrated by crimping b inside.
【００１６】つまり図２（ａ）に示すように、中間感圧
板４の下面側に絶縁リング６を挟み込んだ状態で内部端
子板５を組み合わせ、その状態で中間感圧板４と内部端
子板とをその中央の凸部４ｃで局部的に溶接（レーザ、
超音波、抵抗）する。つぎに図２（ｂ）に示すように、
中間感圧板４の上面側の円筒部４ｂ内にまず第２の絶縁
リング１０をはめ込み、その絶縁リング１０の内周に外
部端子板３をはめ込み、さらにその上に感温抵抗素子９
を重ねるようにはめ込む。つぎに図２（ｃ）に示すよう
に、円筒部４ｂを内側にかしめることで外部端子板３・
感温抵抗素子９・絶縁リング１０を下面側の絶縁リング
６および内部端子板５とともに一体化する。That is, as shown in FIG. 2A, the inner terminal plate 5 is assembled with the insulating ring 6 sandwiched on the lower surface side of the intermediate pressure-sensitive plate 4, and the intermediate pressure-sensitive plate 4 and the inner terminal plate are connected in this state. Weld locally (laser,
Ultrasonic wave, resistance). Next, as shown in FIG.
First, the second insulating ring 10 is fitted in the cylindrical portion 4b on the upper surface side of the intermediate pressure-sensitive plate 4, the outer terminal plate 3 is fitted on the inner periphery of the insulating ring 10, and the temperature-sensitive resistance element 9 is further placed thereon.
Fit so that they overlap. Next, as shown in FIG. 2 (c), by crimping the cylindrical portion 4b inward, the external terminal board 3
The temperature-sensitive resistance element 9 and the insulating ring 10 are integrated with the insulating ring 6 on the lower surface side and the internal terminal board 5.
【００１７】その後図１に示すように、リング形の封口
ガスケット７の内周に仮組み状態の外部端子板３・感温
抵抗素子９・絶縁リング１０・中間感圧板４・絶縁リン
グ６・内部端子板５をはめ込んで一体的な蓋要素を構成
する。その後、電池ケース１内に収納されている発電要
素２から引き出されたリードタブ８の先端を内部端子板
５の下面側に溶接する。その後、一体的な蓋要素を電池
ケース１の開口部分の内周にはめ込み、ケース開口部分
を内側にかしめて封口ガスケット７を圧縮し、ケースを
密封している。After that, as shown in FIG. 1, the outer terminal plate 3, the temperature-sensitive resistance element 9, the insulating ring 10, the intermediate pressure-sensitive plate 4, the insulating ring 6 and the inner portion of the ring-shaped sealing gasket 7 are temporarily assembled. The terminal plate 5 is fitted to form an integral lid element. After that, the tips of the lead tabs 8 drawn out from the power generation element 2 housed in the battery case 1 are welded to the lower surface side of the internal terminal board 5. After that, an integral lid element is fitted to the inner periphery of the opening of the battery case 1, the case opening is caulked inward, the sealing gasket 7 is compressed, and the case is sealed.
【００１８】発電要素２の一方の電極はリードタブ８に
より内部端子板５に接続され、内部端子板５は中央の前
記溶接点で中間感圧板４に接続され、中間感圧板４は感
温抵抗素子９を介して外部端子板３に接続されている。
この外部端子板３に負荷回路が接続されることになる。
そして、電池ケース１内の圧力は内部端子板５のガス抜
き穴を通じて中間感圧板４に作用する。内圧が異常上昇
すると、中間感圧板４が外側へ膨らむように変形し、中
間感圧板４と内部端子板５との溶接点が剥がれ、外部端
子板３につながる充電又は放電電流回路が遮断される
（感圧遮断回路）。中間感圧板４がさらに大きく変形す
るとついには破断し、ケース１内のガスが安全に外部に
放出される（安全弁）。また電池の温度が異常上昇する
と、外部端子板３につながる充電又は放電電流回路中に
挿入されている感温抵抗素子９の抵抗値が増大し、充電
又は放電電流を減少させる（感温遮断回路）。One electrode of the power generating element 2 is connected to the internal terminal plate 5 by the lead tab 8, the internal terminal plate 5 is connected to the intermediate pressure sensitive plate 4 at the welding point at the center, and the intermediate pressure sensitive plate 4 is a temperature sensitive resistance element. It is connected to the external terminal board 3 via 9.
A load circuit is connected to this external terminal board 3.
The pressure in the battery case 1 acts on the intermediate pressure sensitive plate 4 through the gas vent hole of the internal terminal plate 5. When the internal pressure rises abnormally, the intermediate pressure-sensitive plate 4 is deformed so as to bulge outward, the welding point between the intermediate pressure-sensitive plate 4 and the internal terminal plate 5 is peeled off, and the charge or discharge current circuit connected to the external terminal plate 3 is cut off. (Pressure-sensitive cutoff circuit). When the intermediate pressure-sensitive plate 4 is further deformed, the intermediate pressure-sensitive plate 4 is finally broken and the gas in the case 1 is safely discharged to the outside (safety valve). When the temperature of the battery rises abnormally, the resistance value of the temperature sensitive resistance element 9 inserted in the charge or discharge current circuit connected to the external terminal board 3 increases and the charge or discharge current is decreased (temperature sensitive cutoff circuit). ).
【００１９】なお図３に示すように、感温抵抗素子９を
廃止して、中間感圧板４の上に直接外部端子板３を重ね
る構成にすれば、感温遮断回路の無いタイプの防爆安全
装置となる。このタイプの防爆安全装置の要部の組立工
程を図４に示している。As shown in FIG. 3, if the temperature-sensitive resistance element 9 is eliminated and the external terminal plate 3 is directly laminated on the intermediate pressure-sensitive plate 4, explosion-proof safety of a type without a temperature-sensitive cutoff circuit. It becomes a device. FIG. 4 shows the assembly process of the essential parts of this type of explosion-proof safety device.
【００２０】[0020]
【発明の効果】この発明によれば、安全弁と感圧遮断回
路を（さらには感温遮断回路も）組み込んだ蓋要素が独
立した部品要素として組み立てられ、この蓋要素を電池
ケースに装着する直前でリードタブが蓋要素に溶接され
る。したがって全体の組立工程が非常に簡単になり、量
産性が向上する。また、感圧遮断回路の要部である中間
感圧板と内部端子板との溶接は独立した状態で行えるの
で、この溶接作業は非常に簡単となり、したがって溶接
精度が向上する。さらに、剛性の高い内部端子板を設け
たことで、電池ケースのかしめによる封口力に対する強
度が増し、封口部の機械的ストレスが中間感圧板と内部
端子板との溶接点に悪影響を与えにくくなる。その結
果、溶接強度が安定し、感圧遮断回路の動作特性が安定
する。According to the present invention, the lid element incorporating the safety valve and the pressure-sensitive cutoff circuit (and also the temperature-sensitive cutoff circuit) is assembled as an independent component element, and immediately before the lid element is mounted in the battery case. The lead tab is welded to the lid element. Therefore, the whole assembling process becomes very simple and mass productivity is improved. Further, since the welding of the intermediate pressure-sensitive plate and the internal terminal plate, which is the main part of the pressure-sensitive cutoff circuit, can be performed in an independent state, this welding work is very simple, and therefore the welding accuracy is improved. Further, by providing the highly rigid internal terminal plate, the strength against the sealing force due to the caulking of the battery case is increased, and the mechanical stress of the sealing portion is less likely to adversely affect the welding point between the intermediate pressure sensitive plate and the internal terminal plate. . As a result, the welding strength becomes stable and the operating characteristics of the pressure-sensitive cutoff circuit become stable.
【図１】この発明の一実施例による防爆安全装置を備え
た電池の要部断面図である。FIG. 1 is a cross-sectional view of essential parts of a battery including an explosion-proof safety device according to an embodiment of the present invention.
【図２】同上電池の要部の組立工程を示す概略図であ
る。FIG. 2 is a schematic view showing a process of assembling a main part of the same battery.
【図３】感温遮断回路の無いこの発明の他の実施例の電
池の要部断面図である。FIG. 3 is a cross-sectional view of a main part of a battery according to another embodiment of the present invention which does not have a temperature-sensitive cutoff circuit.
【図４】図３の電池の要部の組立工程を示す概略図であ
る。FIG. 4 is a schematic view showing a process of assembling a main part of the battery shown in FIG.
１ 電池ケース ２ 発電要素 ３ 外部端子板 ４ 中間感圧板 ４ａ 円板部 ４ｂ 円筒部 ４ｃ 凸部 ５ 内部端子板 ６ 絶縁リング ７ 封口ガスケット ８ リードタブ ９ 感温抵抗素子 １０ 第２の絶縁リング 1 Battery Case 2 Power Generation Element 3 External Terminal Plate 4 Intermediate Pressure Sensing Plate 4a Disc Part 4b Cylindrical Part 4c Convex Part 5 Internal Terminal Plate 6 Insulation Ring 7 Sealing Gasket 8 Lead Tab 9 Temperature Sensitive Resistance Element 10 Second Insulation Ring
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山本 浩平 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 日野 義久 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 名倉 秀哲 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 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kohei Yamamoto 5-36-11 Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (72) Yoshihisa Hino 5-36-11 Shinbashi, Minato-ku, Tokyo Fuji Inside the Electrochemical Co., Ltd. (72) Inventor Hidetetsu Nagura 5-3-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Electric Chemical Co., Ltd.
Claims (5)
電池ケースに収納された発電要素と、前記電池ケースの
開口部を塞ぐ蓋要素とからなる電池であって、 前記蓋要素は、外部端子板と、中間感圧板と、内部端子
板と、絶縁リングと、封口ガスケットとを有し、前記外
部端子板および前記内部端子板は、剛性の比較的大きな
金属板からなり、その外形は円形であり、中間部分にガ
ス抜き穴が形成されており、前記中間感圧板は、撓みや
すくて破断しやすい薄い金属板からなり、 前記中間感圧板の下面側に前記絶縁リングを挟み込んだ
状態で前記内部端子板が組み合わされ、前記中間感圧板
と前記内部端子板の少なくとも一方の中央部分に形成さ
れた凸部で両者が接触し、その接触部分で両者が局部的
に溶接されており、前記中間感圧板の上面側に前記外部
端子板が重ね合わされ、これら外部端子板・中間感圧板
・絶縁リング・内部端子板がリング形の前記封口ガスケ
ットの内周にはめ込まれることで一体的な前記蓋要素が
構成され、 前記発電要素の一方の電極に接続されているリードタブ
の先端が前記内部端子板の下面に溶接され、一体的な前
記蓋要素が前記電池ケースの開口部分の内周にはめ込ま
れ、前記電池ケースの開口部分が内側にかしめられるこ
とで前記封口ガスケットが圧縮されて、前記電池ケース
が密封されていることを特徴とする防爆安全装置を備え
た電池。1. A battery comprising a cylindrical metal battery case having a bottom, a power generating element housed in the battery case, and a lid element for closing an opening of the battery case, wherein the lid element comprises: It has an external terminal plate, an intermediate pressure-sensitive plate, an internal terminal plate, an insulating ring, and a sealing gasket, and the external terminal plate and the internal terminal plate are made of a metal plate having a relatively large rigidity, and their outer shapes are It is circular and has a gas vent hole in the middle part, and the intermediate pressure-sensitive plate is made of a thin metal plate that is easily bent and easily broken, and the insulating ring is sandwiched on the lower surface side of the intermediate pressure-sensitive plate. The internal terminal plate is combined, both contact at a convex portion formed in the central portion of at least one of the intermediate pressure-sensitive plate and the internal terminal plate, both are locally welded at the contact portion, On the intermediate pressure plate The external terminal board is superposed on the side, and the external terminal board, the intermediate pressure-sensitive board, the insulating ring, and the internal terminal board are fitted into the inner periphery of the ring-shaped sealing gasket to form the integral lid element, The tip of the lead tab connected to one electrode of the power generating element is welded to the lower surface of the internal terminal plate, and the integral lid element is fitted into the inner periphery of the opening of the battery case, A battery provided with an explosion-proof safety device, characterized in that the sealing gasket is compressed by caulking the opening portion inside and the battery case is sealed.
間感圧板は円板部の外周に短い円筒部が連続した浅いカ
ップ型に製作されたものであり、前記中間感圧板の上面
側に前記円筒部内にはめ込まれた状態で前記外部端子板
が重ね合わされ、前記円筒部が内側にかしめられること
で両者が一体化されていることを特徴とする防爆安全装
置を備えた電池。2. The battery according to claim 1, wherein the intermediate pressure-sensitive plate is manufactured in a shallow cup shape in which a short cylindrical portion is continuous with an outer circumference of a disc portion, and the intermediate pressure-sensitive plate is provided on an upper surface side of the intermediate pressure-sensitive plate. A battery equipped with an explosion-proof safety device, characterized in that the external terminal plates are superposed in a state of being fitted in the cylindrical portion, and the cylindrical portion is caulked inward to integrate the both.
間感圧板と前記外部端子板との間に、ドーナツ板形に形
成された正特性の感温抵抗素子および第２の絶縁リング
が挟み込まれ、この抵抗素子を介して前記中間感圧板と
前記外部端子板とが電気的に接続されていることを特徴
とする防爆安全装置を備えた電池。3. The battery according to claim 2, wherein a positive temperature-sensitive resistor element formed in a donut plate shape and a second insulating ring are sandwiched between the intermediate pressure sensitive plate and the external terminal plate. A battery equipped with an explosion-proof safety device, wherein the intermediate pressure-sensitive plate and the external terminal plate are electrically connected via the resistance element.
り、前記中間感圧板の下面側に前記絶縁リングを挟み込
んだ状態で前記内部端子板を組み合わせ、その状態で前
記中間感圧板と前記内部端子板とをその中央部分で局部
的に溶接し、その後、前記中間感圧板の上面側の前記円
筒部内にはめ込むように前記外部端子板を重ね合わせ、
前記円筒部を内側にかしめることで両者を一体化し、こ
れら外部端子板・中間感圧板・絶縁リング・内部端子板
をリング形の前記封口ガスケットの内周にはめ込むこと
で一体的な前記蓋要素を構成し、その後、前記リードタ
ブの先端を前記内部端子板の下面側に溶接することを特
徴とする電池の製造方法。4. In manufacturing the battery according to claim 2, the internal terminal plate is assembled in a state where the insulating ring is sandwiched on the lower surface side of the intermediate pressure-sensitive plate, and in that state, the intermediate pressure-sensitive plate and the internal portion. A terminal plate and a central portion thereof are locally welded, and then the external terminal plate is superposed so as to be fitted into the cylindrical portion on the upper surface side of the intermediate pressure-sensitive plate,
By integrally crimping the cylindrical part inside, the external terminal plate, the intermediate pressure-sensitive plate, the insulating ring, and the internal terminal plate are fitted into the inner periphery of the ring-shaped sealing gasket to form an integral lid element. And then welding the tip of the lead tab to the lower surface side of the internal terminal board.
記中間感圧板の上面側の前記円筒部内に前記外部端子板
をはめ込む際に、ドーナツ板形に形成された正特性の感
温抵抗素子および第２の絶縁リングを前記中間感圧板と
前記外部端子板の間に挟み込むように組み合わせ、前記
抵抗素子を介して前記中間感圧板と前記外部端子板とを
電気的に接続した状態で前記円筒部を内側にかしめて、
これらを一体化することを特徴とする電池の製造方法。5. The temperature-sensitive resistance element having a positive characteristic formed in a donut plate shape when the external terminal plate is fitted into the cylindrical portion on the upper surface side of the intermediate pressure-sensitive plate according to claim 4. And the second insulating ring are combined so as to be sandwiched between the intermediate pressure-sensitive plate and the external terminal plate, and the cylindrical portion is formed in a state where the intermediate pressure-sensitive plate and the external terminal plate are electrically connected via the resistance element. Crimp inside,
A method of manufacturing a battery, characterized by integrating these.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6143205A JPH07235288A (en) | 1993-12-28 | 1994-06-24 | Battery with explosion preventing safety device and its manufacture |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5-70631 | 1993-12-28 | ||
| JP7063193 | 1993-12-28 | ||
| JP6143205A JPH07235288A (en) | 1993-12-28 | 1994-06-24 | Battery with explosion preventing safety device and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07235288A true JPH07235288A (en) | 1995-09-05 |
Family
ID=26411762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6143205A Pending JPH07235288A (en) | 1993-12-28 | 1994-06-24 | Battery with explosion preventing safety device and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07235288A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6322922B1 (en) * | 1998-01-12 | 2001-11-27 | Matsushita Electric Industrial Co., Ltd. | Sealed battery and method for manufacturing same |
| JP2009224325A (en) * | 2008-03-17 | 2009-10-01 | Samsung Sdi Co Ltd | Cylindrical secondary battery |
| JP2010118349A (en) * | 2009-12-21 | 2010-05-27 | Sony Corp | Sealed battery |
| JP5270154B2 (en) * | 2005-05-16 | 2013-08-21 | タイコエレクトロニクスジャパン合同会社 | Sealing body |
| US8986876B2 (en) | 2008-12-18 | 2015-03-24 | Samsung Sdi Co., Ltd. | Cap assembly and secondary battery having the same |
-
1994
- 1994-06-24 JP JP6143205A patent/JPH07235288A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6322922B1 (en) * | 1998-01-12 | 2001-11-27 | Matsushita Electric Industrial Co., Ltd. | Sealed battery and method for manufacturing same |
| JP5270154B2 (en) * | 2005-05-16 | 2013-08-21 | タイコエレクトロニクスジャパン合同会社 | Sealing body |
| JP2009224325A (en) * | 2008-03-17 | 2009-10-01 | Samsung Sdi Co Ltd | Cylindrical secondary battery |
| US9397323B2 (en) | 2008-03-17 | 2016-07-19 | Samsung Sdi Co., Ltd. | Cylinder type secondary battery |
| US8986876B2 (en) | 2008-12-18 | 2015-03-24 | Samsung Sdi Co., Ltd. | Cap assembly and secondary battery having the same |
| JP2010118349A (en) * | 2009-12-21 | 2010-05-27 | Sony Corp | Sealed battery |
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