JP2978754B2 - Explosion-proof battery - Google Patents
Explosion-proof batteryInfo
- Publication number
- JP2978754B2 JP2978754B2 JP8028887A JP2888796A JP2978754B2 JP 2978754 B2 JP2978754 B2 JP 2978754B2 JP 8028887 A JP8028887 A JP 8028887A JP 2888796 A JP2888796 A JP 2888796A JP 2978754 B2 JP2978754 B2 JP 2978754B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- battery
- conductive member
- gasket
- sensitive
- 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.)
- Expired - Lifetime
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)
Description
【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、感温遮断機能がある。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
のガスをに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り、感温遮断
機能は、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または放電電流を
絞り、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 High energy density batteries generally have an explosion-proof function, which includes an internal pressure releasing function, a pressure-sensitive shut-off function, and a temperature-sensitive shut-off function. The internal pressure release function releases gas from the battery to the outside when the pressure inside the battery case rises abnormally to prevent an explosion.The pressure-sensitive shut-off function charges when the pressure inside the battery case rises abnormally. The current or discharge current is interrupted inside the battery to prevent abnormal charging or discharging from continuing, and the temperature-sensitive shut-off function responds to an abnormal rise in temperature inside the battery and reduces the internal resistance of the battery. The charge current or discharge current is narrowed by rapidly rising to prevent the abnormal charging or discharging 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
断機能に加えて感温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。Many high-energy density lithium ion secondary batteries have an internal pressure release function and a temperature-sensitive shut-off function in addition to a pressure-sensitive shut-off function. , The pressure-sensitive shutoff function is activated to stop charging or discharging, and the internal pressure release function is activated. It is extremely important in designing this type of battery that high-precision, highly reliable explosion-proof functions are realized with a structure that is as compact and mass-producible as possible. 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。[0004] A typical structure of a battery having an internal pressure releasing function and a pressure-sensitive shut-off function is disclosed in Japanese Patent Application Laid-Open No. 2-288063. 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. A blocking function is provided on 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 broken, and an insulating plate called a lead stripper. The pressure in the battery case acts on the intermediate pressure-sensitive plate, and when the pressure increases, the intermediate pressure-sensitive plate bends outward, and when the pressure exceeds a set pressure, the intermediate pressure-sensitive plate is broken, and gas is released from the gas vent hole of the external terminal plate. .
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小穴ごしに中間感
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, a lead tab connected to one electrode of the power generating element is welded to a central projection of the intermediate pressure sensing plate through a small hole at the center of the insulating plate. Since the pressure sensitive plate is deformed so as to swell outward, welding of the lead tab to the intermediate pressure sensitive plate is peeled off, and the conductive path leading to the external terminal plate is cut off. 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 Application Laid-Open No. 2-288063, an intermediate pressure-sensitive plate and an insulating plate, which are components of a lid element, are temporarily assembled by an intermediate fitting, and an ultrasonic welding process of the lead tab and the intermediate pressure-sensitive plate is performed. Is easier and more accurate,
In addition, it is devised to facilitate assembly of the lid element and attachment to the battery case. However, mass productivity and assembly accuracy are completely insufficient 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 process of welding the lead tab to the intermediate pressure sensing 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 sensing plate temporarily assembled with the intermediate fitting body, and then the lead tab is used. An external terminal plate is superimposed on the upper surface of the intermediate pressure-sensitive plate connected to the battery case side, the outer peripheral portion of the intermediate pressure-sensitive plate is caulked to be integrated with the external terminal plate, and a sealing gasket is attached to the outer periphery of these. . This entire operation 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、小穴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る。そのため最終的に溶接強度がば
らつく。Also, the work of fitting the central projection of the intermediate pressure-sensitive plate into the small hole of the insulating plate and welding the lead tab to the projection through the small hole is troublesome, and it is difficult to increase the precision. Furthermore, after the lead tab is welded to the central projection of the intermediate pressure-sensitive plate, the outer peripheral portion of the intermediate pressure-sensitive plate is crimped to integrate the external terminal plate. It also acts on the lead tab welding point, and the welding point may come off. Therefore, 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-shaped 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 becomes smaller with the intermediate fitting body. There is a case where it is dragged into the hole and cannot be reliably separated at 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。As described above, problems such as a decrease in the operation accuracy and reliability of the pressure-sensitive cutoff function occur.
【００１１】そこで、このような不具合を解決するもの
として特開平５−３４３０４３号公報に防爆機能を有す
る電池が示されており、この電池は前述した特開平２−
２８８０６３号公報に開示の防爆機能を有する電池にお
いて、前記絶縁板に代えて金属板を配設し、この金属板
には前記リードタブを溶接する小孔をなくしてガス抜き
孔のみを開口し、この金属板に対して、その上面中央に
前記中間感圧板の中央突部を溶接するとともにその下面
にリードタブを溶接する構成としている。また、予め中
間感圧板の中央突部と前記金属板との溶接強度を所定の
値に設定しておき、電池内圧が上昇して中間感圧板が発
電要素と反対側に膨出して変形した場合に、中間感圧板
の中央突部と金属板とは設定された溶接強度に応じて剥
離し、外部端子板につながる導電経路が遮断されるよう
になっている。In order to solve such a problem, Japanese Patent Application Laid-Open No. 5-34043 discloses a battery having an explosion-proof function.
In the battery having the explosion-proof function disclosed in Japanese Patent No. 288063, a metal plate is provided in place of the insulating plate, and the metal plate does not have a small hole for welding the lead tab and has only a gas vent hole. A central projection of the intermediate pressure-sensitive plate is welded to the center of the upper surface of the metal plate, and a lead tab is welded to the lower surface thereof. Also, when the welding strength between the central projection of the intermediate pressure-sensitive plate and the metal plate is set to a predetermined value, and the internal pressure of the battery rises and the intermediate pressure-sensitive plate swells to the side opposite to the power generating element and is deformed. In addition, the central projection of the intermediate pressure-sensitive plate and the metal plate are separated according to the set welding strength, so that a conductive path leading to the external terminal plate is cut off.
【００１２】以上の構成により、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小穴には
め込み小穴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。With the above arrangement, as described above, the step of welding the lead tab to the intermediate pressure-sensitive plate and then assembling the lid element, or inserting the central projection of the intermediate pressure-sensitive plate into the small hole of the insulating plate and projecting through the small hole. The work of welding the lead tab to the part can be eliminated, and the operation accuracy and reliability of the pressure-sensitive shut-off function are improved.
【００１３】[0013]
【発明が解決しようとする課題】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、感圧遮断機
能の動作精度および信頼性の点でなお満足できるもので
はなかった。即ち、電池内圧上昇時に外部端子板につな
がる導電経路を遮断するにあたって、中間感圧板の中央
突部と金属板との剥離は設定された溶接強度に依存す
る。ところが所定の電池内圧に対して高精度に導電経路
を遮断するように溶接強度を精密に設定することは非常
に困難であり結果として前述したような防爆機能を有す
る電池にあっては動作精度のばらつきを抑えることがで
きず十分な信頼性が得難いのである。However, the batteries having the explosion-proof function as described above have not been satisfactory in terms of the operational accuracy and reliability of the pressure-sensitive shut-off function. That is, in blocking the conductive path leading to the external terminal plate when the internal pressure of the battery rises, the separation between the central projection of the intermediate pressure sensing plate and the metal plate depends on the set welding strength. However, it is very difficult to precisely set the welding strength so as to cut off the conductive path with high accuracy for a predetermined battery internal pressure, and as a result, in the battery having the explosion-proof function as described above, the operation accuracy is not high. Variations cannot be suppressed and sufficient reliability cannot be obtained.
【００１４】このように、所定の電池内圧で溶接部が剥
離するように溶接強度を制御しながら溶接する作業自体
が煩雑で再現性に乏しいなど組立性に悪影響を及ばすば
かりか、溶接強度の精度を無理にでも上げようとすると
組立の速度を遅くしなければならなかったりして量産性
を犠牲にしなければならなかった。As described above, the welding operation itself while controlling the welding strength so that the welded portion is peeled off at a predetermined internal pressure of the battery is complicated and poor in reproducibility. In order to increase the accuracy, the assembly speed must be reduced, and mass productivity must be sacrificed.
【００１５】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、防爆機能の動作精度および
信頼性を高めるとともに、かつ組立性および量産性を高
め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 conventional problems, and has as its object to provide a battery having an explosion-proof function that enhances the operation accuracy and reliability of the explosion-proof function and also enhances the assemblability and mass productivity. Is to do.
【００１６】[0016]
【課題を解決するための手段】前記目的を達成するため
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塞ぐ蓋要素とからなる
電池であって、前記蓋要素は、剛性の比較的大きな金属
製の端子板と、撓みやすくて破断しやすい金属板からな
る中間感圧板と、絶縁性の固定板と、上方に突出する突
部および基部からなる導電部材と、絶縁性の筒状ガスケ
ットとを有し、前記端子板および前記固定板はガス抜き
穴が形成されており、前記導電部材は前記固定板の上面
側に前記突部上面が露出するとともに前記固定板の下面
側に前記基部下面が露出し、前記電池ケースの開口部分
の内周に前記ガスケットが嵌入され、前記ガスケットの
内周に前記固定板がはめ込まれ、前記固定板の上に前記
中間感圧板と端子板とが積層され、前記導電部材と前記
中間感圧板とは前記導電部材の前記突部で両者が接続し
てその接続部を含む接触部分でのみ両者が導通してお
り、前記リードタブの先端が導電部材の前記基部に接続
されており、前記電池ケースの開口部分が内側にかしめ
られることで前記ガスケットが圧縮されて前記電池ケー
スが前記蓋要素で密封されてなり、前記電池ケースの内
部が所定の内圧に達することにより外側に膨出した前記
中間感圧板によって前記導電部材の前記突部の前記接続
部の周囲が破断することにより前記リードタブと前記端
子板との導電経路が遮断されるようにしてなるのであ
る。In order to achieve the above object, according to the present invention, a bottomed cylindrical battery case, a power generation element housed in the battery case, and one electrode of the power generation element are connected. A battery comprising a lead tab and a lid element which is electrically connected to the lead tab and closes an opening of the battery case, wherein the lid element is relatively rigid and has a relatively large metal terminal plate, and is easily bent and broken. An intermediate pressure-sensitive plate made of a metal plate, an insulating fixing plate, a conductive member consisting of a protrusion and a base protruding upward, and an insulating tubular gasket; and the terminal plate and the fixing plate. A gas vent hole is formed, and the conductive member has the upper surface of the protrusion exposed on the upper surface side of the fixing plate and the lower surface of the base exposed on the lower surface side of the fixing plate. The gas on the inner circumference The fixed plate is fitted into the inner periphery of the gasket, the intermediate pressure-sensitive plate and the terminal plate are laminated on the fixed plate, and the conductive member and the intermediate pressure-sensitive plate are connected to each other by the conductive member. The two protruding portions are connected to each other, and both are electrically connected only at a contact portion including the connection portion, the leading end of the lead tab is connected to the base portion of the conductive member, and the opening portion of the battery case is inside. By being caulked, the gasket is compressed, the battery case is sealed with the lid element, and the conductive member is formed by the intermediate pressure-sensitive plate that swells outward when the inside of the battery case reaches a predetermined internal pressure. The conductive path between the lead tab and the terminal plate is cut off by breaking the periphery of the connecting portion of the projection.
【００１７】また、前記固定板と前記ガスケットとを一
つの部品で構成してガスケット板としてもよい。Further, the fixing plate and the gasket may be formed as a single component to form a gasket plate.
【００１８】好ましくは、前記導電部材は前記固定板に
埋設されて一体化されてなるのである。Preferably, the conductive member is embedded in the fixed plate and integrated.
【００１９】また好ましくは、前記ガスケットの外周に
保持リングが配設され、前記ガスケット下端周辺部が前
記保持リングによって前記固定板に圧着されてなるので
ある。Preferably, a retaining ring is provided on the outer periphery of the gasket, and a peripheral portion of a lower end of the gasket is pressed against the fixing plate by the retaining ring.
【００２０】さらに好ましくは、前記導電部材の前記突
状部が円筒状に形成され、あるいは矩形板を突状に折曲
して形成されてなるのである。More preferably, the projecting portion of the conductive member is formed in a cylindrical shape, or is formed by bending a rectangular plate into a projecting shape.
【００２１】また、前記固定板の材質を荷重たわみ温度
が２００℃以上のプラスチックとすることが望ましい。It is preferable that the material of the fixing plate is plastic having a deflection temperature under load of 200 ° C. or more.
【００２２】ここで荷重たわみ温度とは、ＡＳＴＭ（Am
erican Society for Testing and Materials）規格のＡ
ＳＴＭ Ｄ ６４８で規定され、１．８２ＭＰａの荷重
で所定量、たわむ温度を示す。Here, the deflection temperature under load is defined as ASTM (Am
erican Society for Testing and Materials) Standard A
It indicates the temperature at which a predetermined amount of deflection occurs under a load of 1.82 MPa, which is defined by STM D648.
【００２３】電池ケース内の圧力は前記固定板あるいは
前記ガスケット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、変形した前記中間感圧板に
よって前記導電部材の前記突部の前記接続部の周囲が破
断することにより前記リードタブと前記端子板との導電
経路が遮断される（感圧遮断機能）。中間感圧板がさら
に大きく変形するとついには破断し、電池ケース内のガ
スが外部に放出される（内圧解放機能）。The pressure in the battery case acts on the intermediate pressure-sensitive plate through a gas vent hole of the fixed plate or the gasket plate. When the internal pressure rises abnormally, the intermediate pressure-sensitive plate is deformed so as to expand outward, and the deformed intermediate pressure-sensitive plate breaks the periphery of the connection portion of the protrusion of the conductive member, so that the lead tab and the terminal plate are broken. Is interrupted (pressure-sensitive shut-off function). When the intermediate pressure sensing plate is further deformed, it is eventually broken, and the gas in the battery case is released to the outside (internal pressure releasing function).
【００２４】前記リードタブと前記端子板との導電経路
を遮断するにあたり、部材間の溶接点を剥離させるとい
った構成にせず、前記導電部材の前記突部の前記接続部
の周囲を破断させる構成にしたため、接続強度を高精度
に設定する必要はなく単に強固に溶接しておけばよい。
即ち、遮断精度は前記導電部材の材質および寸法形状に
のみ依存するので、これらを設計時に定めておくだけで
製造時に接続強度の高精度な制御を行う必要はなく、内
圧に対する導電経路の遮断精度を容易に設定できる。し
たがって、導電経路の遮断を内圧の上昇に対して高精度
に行うことができる。また、接続強度を高精度にする必
要がないので組立が容易となる。In order to cut off the conductive path between the lead tab and the terminal plate, a structure is adopted in which the periphery of the connecting portion of the projection of the conductive member is broken without separating the welding point between the members. In addition, it is not necessary to set the connection strength with high precision, and it is sufficient to simply perform a strong welding.
That is, since the cutoff accuracy depends only on the material and dimensions of the conductive member, it is not necessary to perform high-precision control of the connection strength at the time of manufacture only by defining these at the time of design, and the cutoff accuracy of the conductive path with respect to the internal pressure. Can be easily set. Therefore, the conduction path can be cut off with high accuracy with respect to an increase in the internal pressure. In addition, since the connection strength does not need to be high precision, assembly becomes easy.
【００２５】前記固定板と前記ガスケットとを一つの部
品で構成して前記ガスケット板とした場合には、部品点
数を減らせる。In the case where the fixing plate and the gasket are formed as one component to form the gasket plate, the number of components can be reduced.
【００２６】前記ガスケットの外周に保持リングを配設
した場合には、前記ガスケット下端周辺部が前記保持リ
ングによって前記固定板に圧着されて前記ガスケットに
前記固定板が確実に保持される。したがって、予期せぬ
外部振動や衝撃を受けても固定板が外れたり導電部材の
接続部に損傷を与えることを確実に防止できるため内圧
上昇に対する導電経路の遮断の動作をより確実に行え
る。When a retaining ring is provided on the outer periphery of the gasket, the lower peripheral portion of the gasket is pressed against the fixing plate by the retaining ring, so that the fixing plate is securely held by the gasket. Therefore, even if an unexpected external vibration or impact is applied, the fixing plate can be reliably prevented from coming off or damaging the connecting portion of the conductive member, so that the operation of blocking the conductive path against the increase in the internal pressure can be performed more reliably.
【００２７】前記導電部材の前記突状部が矩形の板を突
状に折曲されたものである場合には、この導電部材の成
形にあたって矩形の板を屈曲させるだけでよいので加工
が簡単となる。In the case where the projecting portion of the conductive member is formed by bending a rectangular plate into a projecting shape, it is only necessary to bend the rectangular plate in forming the conductive member, so that the processing is simple. Become.
【００２８】固定板の材質を荷重たわみ温度が２００℃
以上のプラスチックとした場合には、高温雰囲気中で過
充電されるなどして、電池内部温度が異常に上昇して例
えば１００℃になっても固定板が軟化してしまうことを
確実に防げる。The material of the fixed plate is subjected to a load deflection temperature of 200 ° C.
In the case of using the above-mentioned plastic, it is possible to reliably prevent the fixing plate from softening even if the battery internal temperature abnormally rises to 100 ° C., for example, due to overcharging in a high-temperature atmosphere.
【００２９】したがって、高温雰囲気中で所定の導電経
路の遮断圧力に達した場合に、固定板が軟化してしまっ
て中間感圧板が外側に変形する動作に対してこれに溶接
された導電部材とともに固定板が追従してしまい、感圧
遮断機能の精度が低下してしまうことを確実に防止でき
る。Accordingly, when the predetermined pressure of the conductive path is reached in a high-temperature atmosphere, the fixing plate is softened and the intermediate pressure-sensitive plate is deformed outwardly together with the conductive member welded thereto. It is possible to reliably prevent the accuracy of the pressure-sensitive shut-off function from being reduced due to the following of the fixed plate.
【００３０】[0030]
【発明の実施の形態】この発明の第１実施例による感温
遮断機能を含む防爆機能を備えた電池の要部構造を図１
に示す。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
（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。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an essential structure of a battery having an explosion-proof function including a temperature-sensitive shut-off function according to a first embodiment of the present invention.
Shown in The basic configuration of this battery is as follows: a bottomed cylindrical metal battery case 1; a power generating element (not shown) housed in the battery case 1; a lead tab 2 connected to one electrode of the power generating element; A lid element electrically connected to the lead tab 2 and closing the opening of the battery case 1.
【００３１】蓋要素は、剛性の比較的大きな金属製の端
子板３と、リング状に形成された正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７
ａおよび基部（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および
固定板６はガス抜き穴３ａ、６ａがそれぞれ形成されて
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
る基部７ｂからなり、図３および図４に示すように、イ
ンサート成形により固定板６に埋設されて一体化されて
いる。その突部７ａの上面は固定板６の上面側に露出す
るとともに固定板６の下面側に基部７ｂの下面が露出し
ている。The cover element includes a metal terminal plate 3 having relatively large rigidity, a temperature-sensitive resistance element (PCT element) 4 having a positive characteristic formed in a ring shape, and an intermediate pressure-sensitive plate 5 made of a flexible metal plate. And an insulating fixing plate 6 and a protruding portion 7 protruding upward.
a and a base (flange) 7b, and an insulating tubular gasket 8. The terminal plate 3 and the fixing plate 6 are formed with gas vent holes 3a and 6a, respectively, and the intermediate pressure sensing plate 5 is formed with a thin portion 5a so as to break at a predetermined internal pressure. The conductive member 7 is composed of a projection 7a having the center of a circular plate protruding in a truncated cone shape and a base 7b formed of the outer periphery thereof. As shown in FIGS. 3 and 4, the conductive member 7 is embedded in the fixed plate 6 by insert molding. Integrated. The upper surface of the protrusion 7a is exposed on the upper surface side of the fixed plate 6, and the lower surface of the base 7b is exposed on the lower surface side of the fixed plate 6.
【００３２】ガスケット８には固定板６と中間感圧板５
とをそれぞれ載置するための段部８ａ、８ｂが形成され
ている。The gasket 8 includes a fixed plate 6 and an intermediate pressure-sensitive plate 5.
And step portions 8a and 8b for mounting the respective components are formed.
【００３３】これら蓋要素の電池ケース１の開口部への
組み付け手順を説明すると、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。The procedure for assembling these lid elements into the opening of the battery case 1 will be described. First, the conductive member 7 embedded in the fixing plate 6 and the intermediate pressure-sensitive plate 5 are ultrasonically welded in advance.
【００３４】このとき、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が、こ
の溶接強度としては中間感圧板５が変形しても溶接点７
ｃで剥離することのないように十分強固なものに設定し
ておく。At this time, the upper surface of the projecting portion 7a of the conductive member 7 is locally welded to the center of the lower surface of the intermediate pressure-sensitive plate 5, and the welding strength of the welding point 7 is maintained even if the intermediate pressure-sensitive plate 5 is deformed.
It is set to be sufficiently strong so that it does not peel at c.
【００３５】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。On the other hand, a gasket 8 is fitted into the upper surface of the stepped portion 1a which has been previously reduced in diameter by beading into the opening of the battery case 1.
【００３６】そして、リードタブ２を導電部材７の基部
７ｂの下面に超音波溶接してガスケット８の内周面にそ
の段部８ａの上面に圧接するように固定板６をはめ込む
とともにガスケット８の段部８ｂの上面に圧接するよう
に中間感圧板５をはめ込む。Then, the lead tab 2 is ultrasonically welded to the lower surface of the base 7b of the conductive member 7, and the fixing plate 6 is fitted on the inner peripheral surface of the gasket 8 so as to be pressed against the upper surface of the step 8a. The intermediate pressure-sensitive plate 5 is fitted so as to be pressed against the upper surface of the portion 8b.
【００３７】次に、ガスケット８の内周面に感温抵抗素
子４と端子板３とを順次、はめ込み、最後に、電池ケー
ス１の開口部分を内側にかしめてガスケット８を圧縮し
て電池ケース１を密封する。Next, the temperature-sensitive resistance element 4 and the terminal plate 3 are sequentially fitted on the inner peripheral surface of the gasket 8, and finally, the gasket 8 is compressed by caulking the opening of the battery case 1 inward. Seal 1
【００３８】電池ケース１の開口部分をかしめる際に
は、その径方向には力を加えず円筒中心軸方向にのみ力
を加えるようにする。このことにより、中間感圧板５と
導電部材７との溶接点７ｃに有害なストレスが加わるこ
とがなく溶接強度が安定して感圧遮断機能の動作特性が
安定する。When caulking the opening of the battery case 1, a force is not applied in the radial direction but only in the direction of the central axis of the cylinder. As a result, no harmful stress is applied to the welding point 7c between the intermediate pressure-sensitive plate 5 and the conductive member 7, the welding strength is stabilized, and the operation characteristics of the pressure-sensitive shut-off function are stabilized.
【００３９】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
の溶接点７ｃ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に負荷回路が接続されることになる。One electrode of the power generating element is connected to the conductive member 7 by the lead tab 2, and the conductive member 7 is connected to the intermediate pressure-sensitive plate 5 at the welding point 7c on the upper surface of the projection 7a.
Is connected to the terminal plate 3 via the temperature-sensitive resistance element 4.
A load circuit is connected to the terminal plate 3.
【００４０】上記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のガス抜き穴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２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
流回路が遮断される（感圧遮断機能）。In using the battery having the above configuration,
When gas is generated inside due to overdischarge, overcharge, or the like, the gas pressure in the battery case 1 acts on the intermediate pressure-sensitive plate 5 through the gas vent hole 6 a of the fixed plate 6. If the internal pressure rises abnormally,
As shown in FIG. 2, the intermediate pressure-sensitive plate 5 is deformed so as to expand outward, and the periphery of the conductive member 7 around the welding point 7c is broken.
As a result, the charging or discharging current circuit connected to the terminal plate 3 is cut off (pressure-sensitive cut-off function).
【００４１】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 the intermediate pressure-sensitive plate 5 is further deformed, the thin portion 5a is eventually 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 in an external circuit connected to the battery and the temperature of the battery rises abnormally, the temperature-sensitive resistance element 4 inserted in the charging or discharging current circuit connected to the terminal plate 3 Increase the resistance value of the battery and decrease the charge or discharge current (temperature-sensitive shut-off function).
【００４２】なお、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。If the temperature-sensitive resistor element 4 is eliminated and the terminal plate 3 is directly stacked on the intermediate pressure-sensitive plate 5, an explosion-proof function having no temperature-sensitive shut-off function can be obtained.
【００４３】リードタブ２と端子板３との導電経路を遮
断するにあたり、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たため、溶接強度
を高精度に設定する必要はなく単に強固に溶接しておけ
ばよい。即ち、遮断精度は前記導電部材の材質および寸
法形状にのみ依存するのでこれらを設計時に定めておく
だけで製造時に溶接強度の高精度な制御を行う必要はな
く内圧に対する導電経路の遮断精度を容易に高い信頼度
で設定できる。したがって、導電経路の遮断を内圧の上
昇に対して高精度に行うことができ、以て感圧遮断機能
の信頼性が向上し安全性が向上する。また、溶接強度を
高精度にする必要がないので組立が容易となり量産性が
向上する。When the conductive path between the lead tab 2 and the terminal plate 3 is cut off, the welding point 7c between the intermediate pressure sensing plate 5 and the conductive member 7 is not peeled off, but the periphery of the conductive member 7 around the welding point 7c is broken. Because of this configuration, it is not necessary to set the welding strength with high precision, and it is sufficient to simply perform welding. That is, since the breaking accuracy depends only on the material and the size and shape of the conductive member, it is not necessary to perform high-precision control of the welding strength at the time of manufacturing only by defining these at the time of design, and the breaking accuracy of the conductive path with respect to the internal pressure is easily improved. Can be set with high reliability. Therefore, the conduction path can be cut off with high accuracy with respect to an increase in the internal pressure, whereby the reliability of the pressure-sensitive cut-off function is improved and the safety is improved. Further, since it is not necessary to make the welding strength high, assembly is facilitated and mass productivity is improved.
【００４４】ここで、本実施例による電池の感圧遮断機
能の遮断特性を確認するため、前述した従来の特開平５
−３４３０４３号公報のものを比較例として本実施例の
ものと比較して電池の内圧に対する遮断作動圧を測定し
た。Here, in order to confirm the shut-off characteristic of the pressure-sensitive shut-off function of the battery according to the present embodiment, the above-mentioned conventional Japanese Patent Application Laid-Open No. Hei 5
The breaking operation pressure with respect to the internal pressure of the battery was measured by comparing the battery of the present invention with that of this example as a comparative example.
【００４５】この作動圧を測定するにあたって、作動圧
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、即ち固定板６の温度を一定に保
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。In measuring the working pressure, a thermostat, a pressurizing pump, and a tester are prepared as working pressure measuring devices. The constant temperature bath has a measuring battery inserted therein and keeps its internal temperature, that is, the temperature of the fixed plate 6, at a constant level, and the pressurizing pump keeps the inside of the battery at a predetermined pressure. A pipe extends from this pressurizing pump,
Pressure can be applied to the inside of the battery through this pipe. The pipe is provided with a pressure gauge so that the pressure applied through the pipe can be measured. In addition, the tester connects each of the measuring terminals extending from the tester to the terminal plate 3 and the conductive member 7 of the measuring battery, and monitors the conduction state between the two to thereby determine the welding point 7c of the conductive member 7. This is for confirming whether or not the periphery has been broken and the conductive path has been interrupted.
【００４６】具体的には、本実施例と比較例とでそれぞ
れ５０個の電池を用意し、測定のために、電池ケース底
部に直径３ｍｍの穴をあけ、所定のガス圧力を導入でき
るパイプをその孔に外部より差し込みガスのリークを避
けるためにＯリングを用いてかしめ治具でこのパイプと
ケースの穴の気密を保つようにした遮断作動圧試験治具
を用いて、２３℃の雰囲気下でこれら電池の各内圧値に
対する前記導電部材の破断個数、即ち電池内導電経路の
遮断個数を調べた。Specifically, 50 batteries were prepared for each of the present embodiment and the comparative example. For measurement, a hole having a diameter of 3 mm was formed in the bottom of the battery case, and a pipe capable of introducing a predetermined gas pressure was used. Insert into the hole from the outside and use an O-ring to prevent gas leakage, and use a caulking jig to maintain the airtightness between the pipe and the case hole. Then, the number of broken conductive members for each internal pressure value of these batteries, that is, the number of interrupted conductive paths in the batteries was examined.
【００４７】その結果、表１に示すように、従来の比較
例では遮断作動圧が１４〜１５Kgf/cm2 を中心に６〜２
５Kgf/cm2 の広い範囲に亘ってばらついているのに対
し、本実施例では１４〜１５Kgf/cm2 に６割以上が集中
するとともに１２〜１７Kgf/cm2 の狭い範囲に収まって
おり、本実施例の電池の感圧遮断機能が高精度であり極
めて優れていることが確認された。なお、中間感圧板５
は内圧が約３０Kgf/cm2に達するとこの薄肉部５ａが破
断するようになっている。As a result, as shown in Table 1, in the comparative example of the related art, the breaking operation pressure was 6 to 2 around the 14 to 15 kgf / cm 2.
Whereas the varied over a wide range of 5 kgf / cm 2, in the present embodiment is accommodated in a narrow range of 12~17Kgf / cm 2 with 14~15Kgf / cm 2 to more than 60% is concentrated, the It was confirmed that the pressure-sensitive shut-off function of the batteries of Examples was highly accurate and extremely excellent. The intermediate pressure plate 5
When the internal pressure reaches about 30 kgf / cm 2 , the thin portion 5 a is broken.
【００４８】[0048]
【表１】 ここで、固定板６の材質について説明する。この材質と
しては、電池が８０℃程度の環境下に保存されたり、あ
るいはまた１００℃程度の高温に比較的短時間さらされ
てもその機能を殆ど損なわずに済ませるため、またこの
部品が直接電解液に触れる部分に載置されること、更に
組立時など多少の外力が加わっても容易には変形しない
などの条件を満たすために、ポリブチレンテレフタレー
ト、ポリフェニレンサルファイド、またはポリテトラフ
ルオロエチレンなどの耐熱性に優れまた耐電解液特性に
優れるとともに剛性の大きな熱可塑性樹脂や、ベークラ
イトなどのフェニル樹脂またはエポキシ樹脂などの熱硬
化性樹脂を用いることができる。[Table 1] Here, the material of the fixing plate 6 will be described. This material is used in order to prevent the battery from being stored in an environment of about 80 ° C or to be exposed to a high temperature of about 100 ° C for a relatively short period of time without substantially impairing its function. In order to satisfy conditions such as being placed on a part that comes in contact with liquid and not easily deformed even when some external force is applied such as during assembly, heat resistant materials such as polybutylene terephthalate, polyphenylene sulfide, or polytetrafluoroethylene are used. It is possible to use a thermoplastic resin having excellent rigidity and excellent electrolytic solution resistance and having high rigidity, or a thermosetting resin such as a phenyl resin such as Bakelite or an epoxy resin.
【００４９】さらに固定板６の材質として、前述した条
件に加えて荷重たわみ温度が２００℃以上のプラスチッ
クを用いることが特に望ましい。具体的には、ガラス繊
維３０重量％入りのポリブチレンテレフタレートや、ガ
ラス繊維４０重量％入りのポリフェニレンサルファイ
ド、ガラス繊維３０重量％入りの液晶ポリマーなどが挙
げられる。Further, as the material of the fixing plate 6, it is particularly desirable to use a plastic having a deflection temperature under load of 200 ° C. or more in addition to the above-mentioned conditions. Specific examples include polybutylene terephthalate containing 30% by weight of glass fiber, polyphenylene sulfide containing 40% by weight of glass fiber, and liquid crystal polymer containing 30% by weight of glass fiber.
【００５０】このような材質を固定板６に用いる理由と
しては、例えば高温雰囲気中で過充電されるような場合
に、電池内部温度が異常に上昇して例えば１００℃にな
っても固定板６が軟化してしまうことを確実に防ぐため
である。即ち、電池内部温度が異常に上昇するとともに
電池内圧が異常に上昇して所定の導電経路の遮断圧力に
達した場合に、固定板６が軟化してしまっていると、中
間感圧板５が外側に変形する動きに対してこれに溶接さ
れた導電部材７とともに固定板６が追従して外側にたわ
んでしまうのである。このため、その所定の遮断圧力で
は、導電部材７の溶接点７ｃの周囲が破断しないため導
電経路が遮断できなくなる。そしてさらに内圧が異常上
昇した時点で、やっと導電経路が遮断できることにな
り、導電経路の遮断圧力に誤差が生じて感圧遮断機能の
精度が低下してしまう可能性がある。The reason why such a material is used for the fixing plate 6 is that, for example, when the battery is overcharged in a high-temperature atmosphere, even if the battery internal temperature rises abnormally and reaches 100 ° C., for example, the fixing plate 6 This is for surely preventing softening. That is, when the battery internal temperature rises abnormally and the battery internal pressure rises abnormally and reaches the cutoff pressure of the predetermined conductive path, if the fixing plate 6 is softened, the intermediate pressure-sensitive plate 5 moves outward. The fixing plate 6 follows the deformation of the fixing plate 6 together with the conductive member 7 welded thereto, and flexes outward. Therefore, at the predetermined cutoff pressure, the periphery of the conductive member 7 around the welding point 7c does not break, so that the conductive path cannot be cut off. Then, when the internal pressure further abnormally rises, the conductive path can be finally cut off, and there is a possibility that an error occurs in the cutoff pressure of the conductive path and the accuracy of the pressure-sensitive cutoff function is reduced.
【００５１】したがって、前述したように、荷重たわみ
温度が２００℃以上のプラスチックを固定板６の材質と
することにより、前記のような可能性を解消でき、過酷
な温度環境における過充電などの誤使用に対しても内圧
上昇に対する導電経路の確実な遮断特性を実現できる。Therefore, as described above, by using plastic having a deflection temperature under load of 200 ° C. or more as the material of the fixing plate 6, the above-mentioned possibility can be eliminated, and erroneous operations such as overcharging in a severe temperature environment can be avoided. Even for use, it is possible to realize a reliable cutoff characteristic of the conductive path against an increase in internal pressure.
【００５２】ここで、固定板６の材質として荷重たわみ
温度が２００℃以上のプラスチックを用いたことによる
有効性を確認するため、表２に示すように、荷重たわみ
温度の異なる材質の固定板６を用いた本実施例の電池に
ついて、その電流遮断機能の作動圧について温度を変え
て調べた。Here, in order to confirm the effectiveness of using a plastic material having a deflection temperature under load of 200 ° C. or more as a material of the fixing plate 6, as shown in Table 2, the fixing plates 6 having different deflection temperatures under load were used. For the battery of this example using, the operating pressure of the current interruption function was examined while changing the temperature.
【００５３】[0053]
【表２】 具体的には、５種類の材質の固定板を用意し、荷重たわ
み温度が２００℃より小さな、ポリプロピレン、ポリプ
ロピレンテレフタレート（これらの材質は射出成形が」
容易で安価である）、荷重たわみ温度が２００℃以上の
ガラス繊維３０重量％入りのポリブチレンテレフタレー
トや、ガラス繊維４０重量％入りのポリフェニレンサル
ファイド、ガラス繊維３０重量％入りの液晶ポリマーを
用いた。[Table 2] Specifically, fixation plates of five types of materials are prepared, and polypropylene and polypropylene terephthalate having a deflection temperature under load of less than 200 ° C. (these materials are injection molded.)
(Easy and inexpensive), polybutylene terephthalate containing 30% by weight of glass fiber having a deflection temperature under load of 200 ° C. or more, polyphenylene sulfide containing 40% by weight of glass fiber, and liquid crystal polymer containing 30% by weight of glass fiber were used.
【００５４】また、作動圧を測定するための測定用電池
としては、本実施例の構成の電池において、発電要素を
収装せずにその開口部に蓋要素が取り付けられたままの
状態とし、且つ電池ケース１の底部に直径３mmの挿通孔
を穿設しておいたものを用いる。As the measuring battery for measuring the operating pressure, in the battery of the configuration of the present embodiment, the power generating element is not accommodated, and the lid element is kept attached to the opening thereof. In addition, a battery case 1 in which an insertion hole having a diameter of 3 mm is formed in the bottom portion is used.
【００５５】そして、各材質の固定板６が組み込まれた
前記測定用電池をそれぞれ１０個ずつ用意し、前記の作
動圧測定装置を用いて、２０℃、４５℃、６０℃、１０
０℃の各温度の雰囲気中でその導電経路の遮断作動圧を
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および導電部材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。このとき、測定用電池内部は発電要素の収装さ
れていない空の状態であるため、測定用電池に組み込ま
れた固定板６の温度は、所定時間経過後においては、恒
温槽の内部の雰囲気温度と同じになる。Then, ten measuring batteries each having the fixed plate 6 of each material incorporated therein were prepared, and the above-mentioned working pressure measuring device was used to prepare 20 ° C., 45 ° C., 60 ° C., 10 ° C.
The breaking operation pressure of the conductive path was measured in the atmosphere at each temperature of 0 ° C. For details, place the battery for measurement in the thermostat,
A pipe extending from the pressurizing pump is inserted into the insertion hole at the bottom of the battery case 1 in an airtight state. Then, each measurement terminal from the tester is connected to the terminal of the battery and the conductive member 7, respectively. In this state, the inside of the thermostat was maintained at each of the above-mentioned ambient temperatures, and the internal pressure of the battery was increased. At this time, since the inside of the measurement battery is in an empty state in which the power generation element is not housed, the temperature of the fixed plate 6 incorporated in the measurement battery is changed to the atmosphere inside the thermostat after a predetermined time has elapsed. It will be the same as the temperature.
【００５６】その結果、表２に示すように、雰囲気温度
２０℃においては、５種類全ての固定板を組み込んだ電
池の内圧が平均値１４または１５Kg/cm 2 で導電経路が
遮断した。特に本発明の荷重たわみ温度が２００℃以上
のものについては、全ての遮断作動圧が１４Kg/cm 2 で
あるとともにその標準偏差も１．１または１．２と優れ
た特性を示した。なお、この遮断作動圧としては１４〜
１８Kg/cm 2 の範囲が望ましい。As a result, as shown in Table 2, at an ambient temperature of 20 ° C., the conductive path was interrupted when the internal pressure of the battery incorporating all five types of fixing plates was 14 or 15 kg / cm 2 on average. In particular, when the deflection temperature under load of the present invention was 200 ° C. or higher, all the shut-off operating pressures were 14 kg / cm 2 and the standard deviation thereof was 1.1 or 1.2, exhibiting excellent characteristics. The shut-off operating pressure is 14 to
A range of 18 kg / cm 2 is desirable.
【００５７】また雰囲気温度４５℃において、荷重たわ
み温度が２００℃より小さなポリプロピレン製の固定板
を組み込んだ電池にあっては、遮断作動圧が２０Kg/cm
2 となり１８Kg/cm 2 を越えてしまうだけでなく、標準
偏差が５．２とそのばらつきが大きくなってしまってい
る。荷重たわみ温度が２００℃より小さなポリブチレン
テレフタレート製の固定板を組み込んだ電池にあって
は、遮断作動圧は１８Kg/cm 2 と望ましい範囲の上限で
あるが、標準偏差が５．０とそのばらつきが大きくなっ
てしまっている。これらに対して、本発明の荷重たわみ
温度が２００℃以上のものについては、その遮断作動圧
が１４または１５Kg/cm 2 であるとともにその標準偏差
も１．０〜１．２とばらつかずに極めて優れた特性を示
した。In a battery incorporating a polypropylene fixing plate having a deflection temperature under load of less than 200 ° C. at an ambient temperature of 45 ° C., the shut-off operating pressure is 20 kg / cm.
In addition to 2 exceeding 18 kg / cm 2 , the standard deviation is 5.2 and the variation is large. For a battery incorporating a fixing plate made of polybutylene terephthalate having a deflection temperature under load of less than 200 ° C., the shut-off operating pressure is 18 Kg / cm 2 , which is the upper limit of the desirable range, but the standard deviation is 5.0 and its variation. Is getting bigger. On the other hand, with respect to the load deflection temperature of the present invention of 200 ° C. or more, the shut-off operating pressure is 14 or 15 kg / cm 2 and the standard deviation thereof does not vary from 1.0 to 1.2. It showed very good properties.
【００５８】雰囲気温度６０℃において、荷重たわみ温
度が２００℃より小さな固定板を組み込んだ電池にあっ
ては、導電経路の遮断が行われなかった。これは、固定
板がほぼ６０℃において軟化してしまい、中間感圧板５
が外側に変形する動きに対してこれに溶接された導電部
材７とともに固定板６が追従して外側にたわんでしまっ
たものと考えられる。これらに対して、本発明の荷重た
わみ温度が２００℃以上のものについては、その遮断作
動圧が１４または１５Kg/cm 2 であるとともにその標準
偏差も１．０〜１．３とばらつかずに極めて優れた特性
を示した。At an ambient temperature of 60 ° C., in the battery incorporating the fixing plate having a deflection temperature under load of less than 200 ° C., the conduction path was not interrupted. This is because the fixed plate softens at approximately 60 ° C. and the intermediate pressure-sensitive plate 5
It is conceivable that the fixing plate 6 was bent outward along with the conductive member 7 welded to the outwardly deforming movement. On the other hand, when the deflection temperature under load of the present invention is 200 ° C. or more, the shut-off operating pressure is 14 or 15 Kg / cm 2 and the standard deviation thereof does not vary from 1.0 to 1.3. It showed very good properties.
【００５９】さらに雰囲気温度１００℃においても、こ
れが６０℃の場合と同様に、荷重たわみ温度が２００℃
より小さな固定板を組み込んだ電池にあっては、導電経
路の遮断が行われなかった。これらに対して、本発明の
荷重たわみ温度が２００℃以上のものについては、その
遮断作動圧が１４〜１８Kg/cm 2 と望ましい範囲内に収
まるとともにその標準偏差も２．２以下とあまりばらつ
くこともなく極めて優れた特性を示した。特にガラス繊
維４０重量％入りのポリフェニレンサルファイドのもの
にあっては、その遮断作動圧が１４Kg/cm 2 と低い値で
作動するとともにその標準偏差が１．３とほとんどばら
つかず、格段に優れた特性を示した。Further, at an ambient temperature of 100 ° C., the deflection temperature under load is 200 ° C., as in the case of 60 ° C.
In the battery incorporating the smaller fixing plate, the conduction path was not interrupted. On the other hand, when the deflection temperature under load of the present invention is 200 ° C. or more, the shut-off operating pressure falls within a desirable range of 14 to 18 kg / cm 2 and the standard deviation thereof varies to 2.2 or less. There were no very good characteristics. In particular, in the case of polyphenylene sulfide containing 40% by weight of glass fiber, the cut-off operating pressure is operated at a low value of 14 kg / cm 2, and its standard deviation is almost not varied to 1.3, so that it is extremely excellent. The characteristics were shown.
【００６０】したがって、固定板の材質を荷重たわみ温
度が２００℃以上のプラスチックとすると、高温雰囲気
中における内圧の異常な上昇に対してばらつきのない導
電経路の確実な遮断特性を実現できる。Therefore, when the material of the fixing plate is plastic having a deflection temperature under load of 200 ° C. or more, it is possible to realize a reliable cutoff characteristic of the conductive path without variation even when the internal pressure is abnormally increased in a high temperature atmosphere.
【００６１】次に、本発明の第２実施例を図５および図
６（ａ）、（ｂ）を参照にして説明する。これは前述し
た第１実施例と次の点が異なる。即ち、別部材として保
持リング９を設け、これをガスケット８の下端部外周に
嵌合してガスケット８の下端周辺部がこの保持リング９
によって固定板６に圧着されるようにする。Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6 (a) and 6 (b). This differs from the first embodiment described above in the following points. That is, a retaining ring 9 is provided as a separate member, and this is fitted around the lower end of the gasket 8 so that the lower peripheral portion of the gasket 8 is
Is pressed against the fixing plate 6.
【００６２】本実施例の電池にあっては、蓋要素を構成
する各部品は第１実施例の場合と同様に動作するため同
様な防爆機能を奏するが、予期せぬ外部振動や衝撃を受
けても固定板６がガスケット８から外れたり導電部材７
の溶接点７ｃに損傷を与えることを確実に防止できるた
め内圧上昇に対する導電経路の遮断の動作をより確実に
行える。In the battery of this embodiment, the components constituting the lid element operate in the same manner as in the first embodiment, and thus have the same explosion-proof function. However, they receive unexpected external vibrations and shocks. Even if the fixing plate 6 comes off the gasket 8 or the conductive member 7
Can be reliably prevented from damaging the welding point 7c, so that the operation of interrupting the conductive path with respect to an increase in the internal pressure can be performed more reliably.
【００６３】保持リング９の断面形状を図５に示すよう
に略Ｌ字形としたり、図６（ａ）に示すようにガスケッ
ト８の下方外端部を外方に突出させた突出部８ｃを形成
して断面矩形の保持リング９をはめ込んだり、図６
（ｂ）に示すようにガスケット８の下方外端部の外周に
嵌合突起８ｄを形成するとともにこの嵌合突起８ｄに嵌
合する溝部９ａを保持リング９に形成して両者をはめ合
わせるようにする等、種々の変形が可能である。The cross-sectional shape of the holding ring 9 is substantially L-shaped as shown in FIG. 5, or a projection 8c is formed by projecting the lower outer end of the gasket 8 outward as shown in FIG. 6 to fit the retaining ring 9 having a rectangular cross section.
As shown in (b), a fitting projection 8d is formed on the outer periphery of the lower outer end of the gasket 8, and a groove 9a fitted to the fitting projection 8d is formed in the holding ring 9 so that the two fit together. Various modifications are possible.
【００６４】また、本実施例では、図５に示すように、
ガスケット８は固定板６の周縁を上下に挟むように内方
への突出部８ｅを設けてより強固に固定板６を保持でき
るようにしている。このとき、突出部８ｅの厚みの分だ
け導電部材７の突出部７ａを電池ケース１開口部の方へ
突出させ中間感圧板５と溶接する。In this embodiment, as shown in FIG.
The gasket 8 is provided with an inwardly projecting portion 8e so as to sandwich the peripheral edge of the fixing plate 6 up and down so that the fixing plate 6 can be held more firmly. At this time, the protrusion 7a of the conductive member 7 is protruded toward the opening of the battery case 1 by the thickness of the protrusion 8e, and is welded to the intermediate pressure-sensitive plate 5.
【００６５】なお、本実施例では固定板６の中心を開口
し、これに導電部材７を挿入して嵌合する構成としてい
るが、これに限らず図１で示した第１実施例のようにイ
ンサート成形によって導電部材７を固定板６に埋設し一
体化する構成としてもよい。In the present embodiment, the center of the fixing plate 6 is opened, and the conductive member 7 is inserted and fitted therein. However, the present invention is not limited to this, and as in the first embodiment shown in FIG. Alternatively, the conductive member 7 may be embedded in the fixing plate 6 by insert molding and integrated therewith.
【００６６】次に、本発明の第３実施例を図７を参照に
して説明する。これは前述した第１実施例と次の点が異
なる。即ち、第１実施例の固定板６とガスケット８とを
一体として一つの部品で構成したガスケット板１０とす
る。この構成により部品点数を減らすことができ組立性
が向上するとともにコストダウンが図れる。Next, a third embodiment of the present invention will be described with reference to FIG. This differs from the first embodiment described above in the following points. That is, the gasket plate 10 is formed by integrating the fixing plate 6 and the gasket 8 of the first embodiment into one piece. With this configuration, the number of parts can be reduced, the assemblability can be improved, and the cost can be reduced.
【００６７】本実施例の電池にあっては、蓋要素を構成
する各部品は第１実施例の場合と同様に動作するため同
様な防爆機能を有している。これを確認するため、前述
した第１実施例の場合と同様に内圧に対する遮断作動圧
を測定した。In the battery of this embodiment, the components constituting the lid element operate in the same manner as in the first embodiment, and thus have the same explosion-proof function. To confirm this, the cutoff operating pressure with respect to the internal pressure was measured as in the case of the first embodiment described above.
【００６８】その結果、表３に示すように、従来の比較
例では遮断作動圧が１４〜１５Kgf/cm2 を中心に６〜２
５Kgf/cm2 の広い範囲に亘ってばらついているのに対
し、本実施例では１４〜１５Kgf/cm2 に５割以上が集中
するとともに１２〜１７Kgf/cm2 の狭い範囲内に収まっ
ており、本実施例の電池の感圧遮断機能が高精度であり
極めて優れていることが確認された。なお、第１実施例
と同様に、中間感圧板５は内圧が約３０Kgf/cm2 に達す
るとこの薄肉部５ａが破断するようになっている。As a result, as shown in Table 3, in the comparative example of the related art, the breaking operation pressure was 6 to 2 around 14 to 15 kgf / cm 2.
Whereas the varied over a wide range of 5 kgf / cm 2, and falls within a narrow range of 12~17Kgf / cm 2 with more than 50% in 14~15Kgf / cm 2 is concentrated in this embodiment, It was confirmed that the pressure-sensitive shut-off function of the battery of this example was highly accurate and extremely excellent. As in the first embodiment, when the internal pressure of the intermediate pressure sensing plate 5 reaches about 30 kgf / cm 2 , the thin portion 5 a is broken.
【００６９】[0069]
【表３】 以上、本発明の第１〜３実施例を説明したが、これら実
施例の導電部材７に代えて、図８、９に示すように、矩
形の板を突状に折曲して突状部７ａを形成した導電部材
７としてもよい。この場合、この導電部材７の成形にあ
たって矩形の板を屈曲させるだけでよいので加工が簡単
となり、量産性が向上しこの部品のコストダウンが図れ
る。[Table 3] The first to third embodiments of the present invention have been described above. Instead of the conductive member 7 in these embodiments, as shown in FIGS. The conductive member 7 formed with 7a may be used. In this case, since it is only necessary to bend a rectangular plate when forming the conductive member 7, the processing is simplified, the mass productivity is improved, and the cost of this component can be reduced.
【００７０】このほかに、種々の寸法形状および材質の
導電部材７を適用でき、例えば、図１０に示すように、
矩形板７の突部７ａ上面に突起７ｄを形成してこの突起
７ｄ先端を中間感圧板５との溶接点７ｃとしてもよい。In addition to the above, conductive members 7 of various sizes and shapes and materials can be applied. For example, as shown in FIG.
A protrusion 7 d may be formed on the upper surface of the protrusion 7 a of the rectangular plate 7, and the tip of the protrusion 7 d may be used as a welding point 7 c with the intermediate pressure-sensitive plate 5.
【００７１】前記の場合も、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（７ｄ）を
破断させる構成にする。Also in the above case, the welding point 7c is sufficiently firmly welded so that the welding point 7c between the intermediate pressure sensing plate 5 and the conductive member 7 is peeled off when the internal pressure rises and the conductive path is cut off. In this configuration, the periphery (7d) of the conductive member 7 around the welding point 7c is broken.
【００７２】なお、前述した第１〜３実施例のような円
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 is not limited to the cylindrical battery as in the first to third embodiments described above, but can be applied 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, it is easy to perform molding, and the yield is improved and the cost is reduced.
【００７３】[0073]
【発明の効果】以上、詳細に説明したように、本発明の
防爆機能を有する電池にあっては、前記導電部材の材質
および寸法形状を設計時に定めるだけで製造時に接続強
度の高精度な制御を行う必要はなく、内圧に対する導電
経路の遮断精度を容易に高い信頼度で設定できる。した
がって、導電経路の遮断を内圧の上昇に対して高精度に
行うことができ、感圧遮断機能の信頼性が向上し安全性
が向上する。また、接続強度を高精度にする必要がない
ので組立が容易となり量産性が向上する。As described above in detail, in the battery having the explosion-proof function of the present invention, the connection strength can be controlled with high accuracy during the production by simply determining the material and dimensions of the conductive member at the time of design. And it is possible to easily and accurately set the cutoff accuracy of the conductive path with respect to the internal pressure. Therefore, the conduction path can be cut off with high accuracy against an increase in the internal pressure, and the reliability of the pressure-sensitive cut-off function is improved, and the safety is improved. In addition, since it is not necessary to make the connection strength high, assembly is easy and mass productivity is improved.
【００７４】前記固定板と前記ガスケットとを一つの部
品で構成して前記ガスケット板とした場合には、部品点
数を減らせるため組立性が向上するとともにコストダウ
ンが図れる。When the fixing plate and the gasket are formed as one component to form the gasket plate, the number of components can be reduced, so that the assemblability can be improved and the cost can be reduced.
【００７５】前記ガスケットの外周に保持リングを配設
した場合には、予期せぬ外部振動や衝撃を受けても固定
板が外れたり導電部材の接続部に損傷を与えることを防
止できるため内圧上昇に対する導電経路の遮断の動作を
より確実に行うことができ、感圧遮断機能の信頼性が向
上しより安全性が向上する。When the retaining ring is provided on the outer periphery of the gasket, it is possible to prevent the fixing plate from coming off or damaging the connecting portion of the conductive member even if an unexpected external vibration or impact is applied. The operation of blocking the conductive path can be performed more reliably, the reliability of the pressure-sensitive blocking function is improved, and the safety is further improved.
【００７６】前記導電部材の前記突状部が矩形の板を突
状に折曲されたものである場合には、加工が簡単となり
量産性が向上しコストダウンが図れる。When the protruding portion of the conductive member is formed by bending a rectangular plate into a protruding shape, the processing is simplified, the mass productivity is improved, and the cost can be reduced.
【００７７】固定板の材質を荷重たわみ温度が２００℃
以上のプラスチックとした場合には、電池内部温度が異
常に上昇して例えば１００℃になっても固定板が軟化し
てしまうことを確実に防げる。このため、高温雰囲気中
における過充電などの過酷な環境においても内圧の異常
な上昇に対してばらつきのない導電経路の確実な遮断特
性を実現できる。The material of the fixing plate is subjected to a load deflection temperature of 200 ° C.
When the above plastic is used, it is possible to reliably prevent the fixing plate from softening even when the battery internal temperature rises abnormally and reaches 100 ° C., for example. For this reason, even in a severe environment such as overcharging in a high-temperature atmosphere, it is possible to realize a reliable cutoff characteristic of a conductive path that does not vary even when the internal pressure is abnormally increased.
【図１】本発明の第１実施例による防爆機能を有する電
池の要部断面図である。FIG. 1 is a sectional view of a main part of a battery having an explosion-proof function according to a first embodiment of the present invention.
【図２】図１の電池において感圧遮断機能が働いた状態
を示す要部断面図である。FIG. 2 is a cross-sectional view of a main part showing a state in which a pressure-sensitive shut-off function operates in the battery of FIG.
【図３】本発明の第１実施例による導電部材が埋設され
た固定板の平面図である。FIG. 3 is a plan view of a fixing plate in which a conductive member according to a first embodiment of the present invention is embedded.
【図４】図３の固定板のIV−Ｏ−IV矢視断面図である。FIG. 4 is a cross-sectional view taken along the line IV-O-IV of the fixing plate of FIG. 3;
【図５】本発明の第２実施例による防爆機能を有する電
池の要部断面図である。FIG. 5 is a sectional view of a main part of a battery having an explosion-proof function according to a second embodiment of the present invention.
【図６】本発明の第２実施例によるガスケットに嵌合し
た保持リングの一部破断要部縦断面図である。FIG. 6 is a longitudinal sectional view of a main part of a retaining ring fitted to a gasket according to a second embodiment of the present invention.
【図７】本発明の第３実施例による防爆機能を有する電
池の要部断面図である。FIG. 7 is a sectional view of a main part of a battery having an explosion-proof function according to a third embodiment of the present invention.
【図８】本発明の導電部材の他の実施例を示す斜視図で
ある。FIG. 8 is a perspective view showing another embodiment of the conductive member of the present invention.
【図９】図８の導電部材を固定板に嵌合あるいは埋設し
た状態を示す平面図である。9 is a plan view showing a state where the conductive member of FIG. 8 is fitted or embedded in a fixing plate.
【図１０】本発明の導電部材の他の実施例とこれに溶接
される固定板を示す断面図である。FIG. 10 is a sectional view showing another embodiment of the conductive member of the present invention and a fixing plate welded thereto.
１ 電池ケース ２ リードタブ ３ 端子板 ４ 感温抵抗素子 ５ 中間感圧板 ６ 固定板 ７ 導電部材 ７ａ 突部 ７ｂ 基部 ７ｃ 溶接部（接続部） ８ ガスケット ９ 保持リング １０ ガスケット板 REFERENCE SIGNS LIST 1 battery case 2 lead tab 3 terminal plate 4 temperature-sensitive resistance element 5 intermediate pressure-sensitive plate 6 fixing plate 7 conductive member 7 a protrusion 7 b base 7 c welded portion (connection portion) 8 gasket 9 retaining ring 10 gasket plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小川 琢司 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 玉井 正広 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 福原 敬司 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 (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 (56)参考文献 特開 平７−192712（ＪＰ，Ａ) 特開 平６−231743（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01M 2/12,2/34 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takuji Ogawa 5-36-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Electric Chemical Co., Ltd. (72) Masahiro Tamai 5-36-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Electric Chemical Co., Ltd. (72) Keiji Fukuhara, Inventor 5-36-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Electric Chemical Co., Ltd. Masatake Nishio, 5-36-11, Shimbashi, Minato-ku, Tokyo No. Fuji Electric Chemical Co., Ltd. (72) Tomoya Murata Inventor 5-36-11 Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (56) References JP-A-7-192712 (JP, A) Kaihei 6-231743 (JP, A) (58) Field surveyed (Int. Cl. 6 , DB name) H01M 2 / 12,2 / 34
Claims (6)
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
口部を塞ぐ蓋要素とからなる電池であって、該蓋要素
は、剛性の比較的大きな金属製の端子板（３）と、撓み
やすくて破断し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（７
ａ）および基部（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、該端子板（３）
および該固定板（６）はガス抜き穴が形成されており、
該導電部材（７）は該固定板（６）の上面側に該突部
（７ａ）上面が露出するとともに該固定板（６）の下面
側に該基部（７ｂ）下面が露出し、該電池ケース（１）
の開口部分の内周に該ガスケット（８）が嵌入され、該
ガスケット（８）の内周に該固定板（６）がはめ込ま
れ、該固定板（６）の上に該中間感圧板（５）と端子板
（３）とが積層され、該導電部材（７）と該中間感圧板
（５）とは該導電部材（７）の該突部（７ａ）で両者が
接続してその接続部（７ｃ）を含む接触部分でのみ両者
が導通しており、該リードタブ（２）の先端が導電部材
（７）の該基部（７ｂ）に接続されており、該電池ケー
ス（１）の開口部分が内側にかしめられることで該ガス
ケット（８）が圧縮されて該電池ケース（１）が該蓋要
素で密封されてなり、該電池ケース（１）の内部が所定
の内圧に達することにより外側に膨出した該中間感圧板
（５）によって該導電部材（７）の該突部（７ａ）の該
接続部（７ｃ）の周囲が破断することにより該リードタ
ブ（２）と該端子板（３）との導電経路が遮断されるよ
うにしてなることを特徴とする防爆機能を有する電池。1. 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. A battery element comprising a cover element electrically connected to (2) and closing an opening of the battery case (1), wherein the cover element comprises a relatively rigid metal terminal plate (3); Intermediate pressure-sensitive plate (5) made of a metal plate that easily bends and breaks
And an insulating fixing plate (6), and a protruding portion (7
a) a conductive member (7) comprising a) and a base (7b), and an insulating tubular gasket (8);
And the fixing plate (6) has a gas vent hole,
In the conductive member (7), the upper surface of the projection (7a) is exposed on the upper surface of the fixing plate (6), and the lower surface of the base (7b) is exposed on the lower surface of the fixing plate (6). Case (1)
The gasket (8) is fitted into the inner periphery of the opening of the gasket (8), the fixing plate (6) is fitted into the inner periphery of the gasket (8), and the intermediate pressure-sensitive plate (5) is placed on the fixing plate (6). ) And a terminal plate (3) are laminated, and the conductive member (7) and the intermediate pressure-sensitive plate (5) are connected to each other by the protrusion (7a) of the conductive member (7) and the connection portion is formed. Only the contact portion including (7c) is conductive, the leading end of the lead tab (2) is connected to the base (7b) of the conductive member (7), and the opening of the battery case (1). Is caulked inward, whereby the gasket (8) is compressed and the battery case (1) is sealed with the lid element. When the inside of the battery case (1) reaches a predetermined internal pressure, it becomes outward. The bulged intermediate pressure-sensitive plate (5) surrounds the connection (7c) of the projection (7a) of the conductive member (7). There battery having explosion-proof features, characterized by comprising as conductive path of the lead tab and (2) the terminal plate (3) is interrupted by breaking.
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
口部を塞ぐ蓋要素とからなる電池であって、該蓋要素
は、剛性の比較的大きな金属製の端子板（３）と、撓み
やすくて破断しやすい金属板からなる中間感圧板（５）
と、上方に突出する突部（７ａ）および基部（７ｂ）か
らなる導電部材（７）と、外周端部が上方に立設された
絶縁性のガスケット板（１０）とを有し、該端子板
（３）および該ガスケット板（１０）はガス抜き穴が形
成されており、該導電部材（７）は該ガスケット板（１
０）の上面側に該突部（７ａ）上面が露出するとともに
該ガスケット板（１０）の下面側に該基部（７ｂ）下面
が露出し、該ガスケット板（１０）が該電池ケース
（１）の開口部分の内周に嵌入され、該ガスケット板
（１０）の上に該中間感圧板（５）と端子板（３）とが
積層され、該導電部材（７）と該中間感圧板（５）とは
該導電部材（７）の該突部（７ａ）の該接続部（７ｃ）
で両者が接続してその接続部を含む接触部分でのみ両者
が導通しており、該リードタブ（２）の先端が導電部材
（７）の該基部（７ｂ）に接続されており、該電池ケー
ス（１）の開口部分が内側にかしめられることで該ガス
ケット板（１０）の外周端部が圧縮されて該電池ケース
（１）が該蓋要素で密封されてなり、該電池ケース
（１）の内部が所定の内圧に達することにより外側に膨
出した該中間感圧板（５）によって該導電部材（７）の
該突部（７ａ）の該接続部（７ｃ）の周囲が破断するこ
とにより該リードタブ（２）と該端子板（３）との導電
経路が遮断されるようにしてなることを特徴とする防爆
機能を有する電池。2. 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. A battery element comprising a cover element electrically connected to (2) and closing an opening of the battery case (1), wherein the cover element comprises a relatively rigid metal terminal plate (3); Intermediate pressure-sensitive plate (5) made of a metal plate that easily bends and breaks
And a conductive member (7) consisting of a protrusion (7a) and a base (7b) projecting upward, and an insulating gasket plate (10) having an outer peripheral end erected upward. The plate (3) and the gasket plate (10) are provided with gas vent holes, and the conductive member (7) is provided with the gasket plate (1).
0), the upper surface of the projection (7a) is exposed on the upper surface side, and the lower surface of the base (7b) is exposed on the lower surface side of the gasket plate (10), and the gasket plate (10) is connected to the battery case (1). The intermediate pressure-sensitive plate (5) and the terminal plate (3) are laminated on the gasket plate (10), and the conductive member (7) and the intermediate pressure-sensitive plate (5) are laminated on the gasket plate (10). ) Means the connecting portion (7c) of the projection (7a) of the conductive member (7).
And the two are electrically connected only at a contact portion including the connection portion, and the leading end of the lead tab (2) is connected to the base (7b) of the conductive member (7); By caulking the opening of (1) inward, the outer peripheral end of the gasket plate (10) is compressed, and the battery case (1) is sealed with the lid element. The periphery of the connection (7c) of the projection (7a) of the conductive member (7) is broken by the intermediate pressure-sensitive plate (5) bulged outward when the inside reaches a predetermined internal pressure. A battery having an explosion-proof function, wherein a conductive path between a lead tab (2) and a terminal plate (3) is cut off.
に埋設されて一体化されてなることを特徴とする請求項
１あるいは２に記載の防爆機能を有する電池。3. The fixing device according to claim 1, wherein the conductive member is provided on the fixing plate.
The battery having an explosion-proof function according to claim 1, wherein the battery is embedded and integrated in the battery.
グ（９）が配設され、該ガスケット（８）下端周辺部が
該保持リング（９）によって前記固定板（６）に圧着さ
れてなることを特徴とする請求項１あるいは３に記載の
防爆機能を有する電池。4. A holding ring (9) is provided on the outer periphery of the gasket (8), and a lower peripheral portion of the gasket (8) is pressed against the fixing plate (6) by the holding ring (9). The battery having an explosion-proof function according to claim 1 or 3.
が円筒状に形成され、あるいは矩形板を突状に折曲して
形成されてなることを特徴とする請求項１乃至４の何れ
か１項に記載の防爆機能を有する電池。5. The projection (7a) of the conductive member (7).
The battery having an explosion-proof function according to any one of claims 1 to 4, wherein the battery is formed in a cylindrical shape or a rectangular plate is bent in a protruding shape.
度が２００℃以上のプラスチックとしてなることを特徴
とする請求項１乃至５の何れか１項に記載の防爆機能を
有する電池。6. The battery having an explosion-proof function according to claim 1, wherein the material of the fixing plate (6) is a plastic having a deflection temperature under load of 200 ° C. or higher.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8028887A JP2978754B2 (en) | 1995-04-21 | 1996-02-16 | Explosion-proof battery |
| KR1019960030757A KR100386394B1 (en) | 1996-02-16 | 1996-07-27 | Battery with explosion-proof function |
| US08/726,198 US5821008A (en) | 1996-02-16 | 1996-10-04 | Battery provided with explosion-proof components |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7-96863 | 1995-04-21 | ||
| JP9686395 | 1995-04-21 | ||
| JP8028887A JP2978754B2 (en) | 1995-04-21 | 1996-02-16 | Explosion-proof battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH097573A JPH097573A (en) | 1997-01-10 |
| JP2978754B2 true JP2978754B2 (en) | 1999-11-15 |
Family
ID=26367033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8028887A Expired - Lifetime JP2978754B2 (en) | 1995-04-21 | 1996-02-16 | Explosion-proof battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2978754B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109546051A (en) * | 2018-11-02 | 2019-03-29 | 襄阳全系康动力机械有限责任公司 | A kind of mine anti-explosion power packet |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3557748B2 (en) * | 1995-09-21 | 2004-08-25 | 宇部興産株式会社 | Sealed non-aqueous secondary battery |
| JP2000003702A (en) * | 1998-06-15 | 2000-01-07 | Alps Electric Co Ltd | Electric circuit interrupt structure of battery |
| KR20030081939A (en) * | 2002-04-15 | 2003-10-22 | 삼성에스디아이 주식회사 | Secondary battery |
| JP5098285B2 (en) * | 2006-10-18 | 2012-12-12 | パナソニック株式会社 | Non-aqueous electrolyte secondary battery and manufacturing method thereof |
| US20120171534A1 (en) * | 2009-12-04 | 2012-07-05 | Shuji Sugimoto | Sealed secondary battery |
| KR102096430B1 (en) * | 2015-01-15 | 2020-04-02 | 엘에스엠트론 주식회사 | External terminal member of electric energy storage device having structure for preventing electrolyte leakage |
| WO2019194053A1 (en) * | 2018-04-06 | 2019-10-10 | パナソニックＩｐマネジメント株式会社 | Cell module |
-
1996
- 1996-02-16 JP JP8028887A patent/JP2978754B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109546051A (en) * | 2018-11-02 | 2019-03-29 | 襄阳全系康动力机械有限责任公司 | A kind of mine anti-explosion power packet |
| CN109546051B (en) * | 2018-11-02 | 2021-09-17 | 襄阳全系康动力机械有限责任公司 | Mining explosion-proof power pack |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH097573A (en) | 1997-01-10 |
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