【０００１】[0001]
【発明の属する技術分野】本発明は、電池ケースおよび
該電池ケースの開口部を封口する蓋板にアルミニウム板
またはアルミニウムクラッド板を用いた角形密閉式蓄電
池に係り、さらに詳しくは、該角形密閉式蓄電池におけ
る安全性を高めるための電気導通路遮断機構の改良に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectangular sealed storage battery using an aluminum plate or an aluminum clad plate for a battery case and a cover plate for closing an opening of the battery case. The present invention relates to an improvement of an electric conduction path blocking mechanism for enhancing safety in a storage battery.
【０００２】[0002]
【従来の技術】近年、角形密閉式蓄電池は、携帯電話や
パーソナルコンピュータなどのポータブル機器の電源と
して使用されることが多くなっており、機器の小型、軽
量化に伴い、それに装着させる電池も軽量化が要請さ
れ、それに応えるため、最近の角形密閉式蓄電池では、
電池ケースおよび該電池ケースの開口部を封口する蓋板
にアルミニウム板を用いて軽量化することが行われてい
る。2. Description of the Related Art In recent years, a sealed rectangular storage battery has been often used as a power source for portable equipment such as a cellular phone and a personal computer. In order to respond to the demand, the recent rectangular sealed storage battery,
2. Description of the Related Art Weight reduction has been performed by using an aluminum plate for a battery case and a lid plate for closing an opening of the battery case.
【０００３】このような角形密閉式蓄電池では、内部短
絡が生じたり、過充電されるなどの異常が生じた場合、
電池内に炭酸ガスなどのガスが多量に発生して電池内圧
が上昇し、電池が高圧下で破裂して、周囲に損傷を与え
るおそれがある。In such a rectangular sealed storage battery, when an abnormality such as an internal short circuit or overcharging occurs,
A large amount of gas such as carbon dioxide gas is generated in the battery, the internal pressure of the battery increases, and the battery may rupture under high pressure to damage surroundings.
【０００４】そのため、電池に電気導通路を遮断する機
構を備えさせることが必要とされるが、角形密閉式蓄電
池では、軽量化の要求に応えつつ高容量化を達成してい
かなければならないこともあって、円筒形電池で採用さ
れているような封口体による封口を採用せず、電池ケー
スの開口端部と蓋板の外周部とを溶接することによって
電池ケースの開口部を封口するため、蓋板に電気導通路
遮断機構を組み込もうとすると、それによって、電池内
部の容積が減少し、ガス発生による電池内圧の上昇によ
り電池ケースに膨れが生じて体積変化が生じやすくなる
ため、蓋板に電気導通路遮断機構を組み込むことができ
ず、また、あえて電気導通路遮断機構を組み込もうとす
ると、上記のように電池の内容積が減少して、高容量化
が達成できないという問題があった。[0004] Therefore, it is necessary to provide the battery with a mechanism for interrupting the electric conduction path. However, in the case of a rectangular sealed storage battery, it is necessary to achieve high capacity while responding to the demand for weight reduction. There is also a method of sealing the opening of the battery case by welding the opening end of the battery case and the outer peripheral portion of the lid plate without employing the sealing by the sealing body as employed in the cylindrical battery. If an attempt is made to incorporate an electric conduction path blocking mechanism into the cover plate, the volume inside the battery is reduced, and the battery case is swelled due to an increase in the battery internal pressure due to gas generation. If the electric conduction path blocking mechanism cannot be incorporated into the lid plate, and if the intention is to attempt to incorporate the electric conduction path blocking mechanism, the internal capacity of the battery is reduced as described above, and a high capacity cannot be achieved. There was a cormorant problem.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記のよう
に従来の角形密閉式蓄電池では蓄板に電気導通路遮断機
構を組み込むことができず、そのため安全性に欠けると
いう問題点を解決し、安価でかつ信頼性の高い電気導通
路遮断機構を備えた角形密閉式蓄電池を提供することを
目的とする。SUMMARY OF THE INVENTION As described above, the present invention solves the problem that the conventional rectangular sealed storage battery cannot incorporate an electric conduction path blocking mechanism in the storage plate, and therefore lacks safety. It is an object of the present invention to provide a square sealed storage battery having an inexpensive and highly reliable electrical conduction path blocking mechanism.
【０００６】[0006]
【課題を解決するための手段】本発明は、電池ケースお
よび該電池ケースの開口部を封口する蓋板にアルミニウ
ム板またはアルミニウムクラッド板を用いた角形密閉式
蓄電池において、電池ケースの側面の変形を利用して電
気導通路を遮断する機構を設け、上記課題を解決したも
のである。SUMMARY OF THE INVENTION The present invention relates to a rectangular sealed storage battery in which an aluminum plate or an aluminum clad plate is used for a battery case and a lid plate for closing the opening of the battery case. The present invention has solved the above-mentioned problem by providing a mechanism for interrupting an electrical conduction path by utilizing the mechanism.
【０００７】上記のようなアルミニウム板またはアルミ
ニウムクラッド板を用いた電池ケースの側面は２〜５ａ
ｔｍの電池内圧で塑性変形を生じるので、この電池ケー
スの側面の変形を利用して電気導通路を遮断することが
できる。しかも、その電気導通路を遮断する機構は安価
に構築でき、また従来よりも低い電池内圧で電気導通路
を遮断できるので、電流の遮断を確実に行うことがで
き、信頼性も向上した。The side of the battery case using the aluminum plate or the aluminum clad plate as described above has a thickness of 2 to 5 a.
Since plastic deformation occurs at the battery internal pressure of tm, the electric conduction path can be cut off by utilizing the deformation of the side surface of the battery case. In addition, the mechanism for interrupting the electric conduction path can be constructed at a low cost, and the electric conduction path can be interrupted with a lower internal pressure of the battery than before, so that the current can be reliably interrupted and the reliability is improved.
【０００８】[0008]
【発明の実施の形態】本発明において、電池ケースに用
いるアルミニウム板またはアルミニウムクラッド板とし
ては、アルミニウム板はもとより、例えば、アルミニウ
ム−マンガン系合金板、アルミニウム−ニッケルクラッ
ド板などが挙げられる。そして、電池ケースは上記アル
ミニウム板またはアルミニウムクラッド板を用い、絞り
加工、押出加工、ダイキャストなどによって有底角筒状
に作製される。通常、電池ケースは横断面形状が長方形
状で、しかもその短辺が長辺に比べて非常に短い場合が
多い。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, as an aluminum plate or an aluminum clad plate used for a battery case, not only an aluminum plate but also an aluminum-manganese alloy plate, an aluminum-nickel clad plate and the like can be mentioned. The battery case is formed into a square tube with a bottom using the above-mentioned aluminum plate or aluminum clad plate by drawing, extrusion, die casting, or the like. Usually, a battery case has a rectangular cross section, and its short side is often much shorter than its long side.
【０００９】また、電池ケースに用いるアルミニウム板
またはアルミニウムクラッド板の厚みは０．３〜０．６
ｍｍ程度が好ましい。アルミニウム板またはアルミニウ
ムクラッド板の厚みが０．６ｍｍより厚くなると、電池
ケースの側面が２〜５ａｔｍ程度の電池内圧で電気導通
路を遮断するのに適した変形を生じなくなるおそれがあ
り、また、アルミニウム板またはアルミニウムクラッド
板の厚みが０．３ｍｍより薄い場合は、高温貯蔵などに
よっても電池ケースの側面に変形が生じ不要時にも電流
が遮断してしまうおそれがある。The thickness of the aluminum plate or aluminum clad plate used for the battery case is 0.3 to 0.6.
mm is preferable. When the thickness of the aluminum plate or the aluminum clad plate is larger than 0.6 mm, the side surface of the battery case may not be deformed to cut off the electric conduction path at the internal pressure of the battery of about 2 to 5 atm. If the thickness of the plate or the aluminum clad plate is less than 0.3 mm, the side surface of the battery case may be deformed even by high-temperature storage or the like, and the current may be cut off even when unnecessary.
【００１０】[0010]
【実施例】つぎに、実施例を挙げて本発明をより具体的
に説明する。ただし、本発明はそれらの実施例のみに限
定されるものではない。Next, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to only these examples.
【００１１】実施例１ 電池ケースの側面に絶縁体を介してアルミニウム製のリ
ード体を取り付けた。この実施例１の角形密閉式蓄電池
の正常時の状態を図１に示し、内圧上昇時の状態を図２
に示す。ただし、図１、図２とも、実施例１の角形密閉
式蓄電池の短辺方向の縦断面を模式的に示すものであ
り、これら図１や図２では、電池の内部構成を示してお
らず（別途、図３に示している）、リード体１１と絶縁
体１２のみ断面で示しており、しかも、それらのリード
体１１や絶縁体１２の厚みを現実より厚く図示してい
る。Example 1 An aluminum lead was attached to the side of a battery case via an insulator. FIG. 1 shows a normal state of the sealed rectangular storage battery according to the first embodiment, and FIG.
Shown in However, FIGS. 1 and 2 schematically show a vertical cross section in the short side direction of the rectangular sealed storage battery of Example 1, and FIGS. 1 and 2 do not show the internal configuration of the battery. 3 (shown separately in FIG. 3), only the lead body 11 and the insulator 12 are shown in a cross section, and the thickness of the lead body 11 and the insulator 12 is shown to be larger than reality.
【００１２】この実施例１の角形密閉式蓄電池の電気導
通路を遮断する機構を図１および図２に基づいて説明す
ると、電池ケース１の側面に絶縁体１２を介してリード
体１１を取り付け、そのリード体１１の一方の端部１１
ａを折り曲げて電池ケース１の側面に接触させている。A mechanism for interrupting the electric conduction path of the rectangular sealed storage battery according to the first embodiment will be described with reference to FIGS. 1 and 2. A lead body 11 is attached to a side surface of a battery case 1 via an insulator 12. One end 11 of the lead body 11
a is bent to contact the side surface of the battery case 1.
【００１３】絶縁体１２はホットメルト性の絶縁性接着
剤で形成しており、この絶縁体１２の厚みは１００μｍ
であり、リード体１１は前記のようにアルミニウム製
で、その厚みは１００μｍである。そして、電池ケース
１は厚さ０．５ｍｍのアルミニウム板で作製され、この
電池ケース１は後に詳述するように正極と電気的に接続
しているので、上記リード体１１は正極端子として機能
する。このリード体１１と電池の負極端子５とに充電器
の端子を接続し、１Ｃの充電電流で連続充電を行ったと
ころ、電池内部にガスが発生して電池内圧が上昇し、そ
のため、電池ケース１の側面は図１に示す平らな状態か
ら図２に示すように凸状に変形し、それによって、リー
ド体１１の端部１１ａが電池ケース１の側面から離脱
し、電気導通路が遮断されて電流が流れなくなり、それ
に伴って、電池ケース１の側面の変形もその時点で停止
し、また、電池の破裂や電解液の漏液に至るようなこと
はなかった。なお、図１や図２では、リード体１１の他
方の端部１１ｂや絶縁体１２の一部が電池ケース１の底
面にまで達しているが、リード体１１や絶縁体１２は少
なくとも電池ケース１の側面に設けられていればよい。The insulator 12 is formed of a hot-melt insulating adhesive, and the thickness of the insulator 12 is 100 μm.
The lead body 11 is made of aluminum as described above, and has a thickness of 100 μm. The battery case 1 is made of an aluminum plate having a thickness of 0.5 mm. Since the battery case 1 is electrically connected to a positive electrode as described later in detail, the lead body 11 functions as a positive electrode terminal. . When a terminal of a charger was connected to the lead body 11 and the negative electrode terminal 5 of the battery, and continuous charging was performed with a charging current of 1 C, gas was generated inside the battery and the internal pressure of the battery was increased. 1 is deformed from the flat state shown in FIG. 1 to a convex shape as shown in FIG. 2, whereby the end 11a of the lead body 11 is separated from the side surface of the battery case 1 and the electric conduction path is cut off. As a result, the current stopped flowing, and the deformation of the side surface of the battery case 1 was stopped at that time, and the battery did not burst or the electrolyte did not leak. 1 and 2, the other end 11b of the lead 11 and a part of the insulator 12 reach the bottom of the battery case 1, but the lead 11 and the insulator 12 It may be provided on the side surface of.
【００１４】上記電気導通路の遮断機構が作動する電池
内圧を推定するために、電池ケース内には発電要素を収
容せず、圧力を導入できる状態で密閉し、その側面に上
記と同様に絶縁体１２を介してリード体１１を取り付
け、そのリード体１１の一方の端部１１ａを上記と同様
に電池ケース１の側面に接触させ、その電池ケース１に
圧力を導入して、電池ケース１の側面をを変形させ、リ
ード体１１の端部１１ａが電池ケース１の側面から離れ
る際の圧力を調べたところ約５ａｔｍであったので、前
記の実装電池（発電要素を収容して電池としての機能を
有するようにした電池）でも約５ａｔｍでリード体１１
の端部１１ａが電池ケース１の側面から離れ、電気導通
路が遮断されたものと考えられる。In order to estimate the internal pressure of the battery at which the above-mentioned electric conduction path shut-off mechanism operates, the battery case is not housed with a power generating element, but is sealed in a state where pressure can be introduced. The lead body 11 is attached via the body 12, one end 11a of the lead body 11 is brought into contact with the side surface of the battery case 1 in the same manner as described above, and pressure is introduced into the battery case 1 to When the side face was deformed and the pressure when the end 11a of the lead body 11 was separated from the side face of the battery case 1 was examined, it was about 5 atm. Battery at about 5 atm.
Is separated from the side surface of the battery case 1 and the electric conduction path is considered to be interrupted.
【００１５】ここで、上記電池の内部構成を図３に基づ
いて説明する。図３はこの実施例１の角形密閉式蓄電池
の本体部分を模式的に示すもので、図３の（ａ）はその
平面図で、（ｂ）はその縦断面図である。ただし、この
図３では、電池の内部構成を理解しやすくするために、
図１や図２とは異なり、長辺方向を正面にして示してい
る。Here, the internal structure of the battery will be described with reference to FIG. FIGS. 3A and 3B schematically show the main body of the rectangular sealed battery according to the first embodiment. FIG. 3A is a plan view and FIG. 3B is a longitudinal sectional view. However, in FIG. 3, in order to easily understand the internal configuration of the battery,
Unlike FIG. 1 and FIG. 2, the long side direction is shown facing forward.
【００１６】図３において、１は正極端子を兼ねる電池
ケースであり、この電池ケース１の開口部を蓋板２が封
口している。そして、上記蓋板２には電解液注入用の注
入孔を封止３が取り付けられている。これら電池ケース
１、蓋板２、封止栓３は、いずれもアルミニウム製であ
り、電池ケース１は平面形状が６ｍｍ×３０ｍｍの長方
形状で、高さが４８ｍｍで、材質は上記のようにアルミ
ニウム製で、その厚みは０．５ｍｍであり、厚さ０．５
ｍｍのアルミニウム板を用いて上記形状に作製されてい
る。蓋板２は厚さ１ｍｍのアルミニウム板を用いて上記
電池ケース１の開口部に嵌め込むのに適したサイズに作
製され、この蓋板２に形設された電解液注入用の注入孔
は直径１ｍｍの円形である。そして、上記注入孔を封止
するための封止栓３は上端部の直径が１ｍｍ、下端部の
直径が０．８ｍｍで下端部近傍がテーパー状になって円
柱からなり、蓋板２との溶接に適するようにアルミニウ
ムで作製されている。In FIG. 3, reference numeral 1 denotes a battery case also serving as a positive electrode terminal, and an opening of the battery case 1 is closed by a cover plate 2. The lid plate 2 is provided with a sealing 3 for an injection hole for injecting an electrolyte. The battery case 1, the lid plate 2, and the sealing plug 3 are all made of aluminum. The battery case 1 is a rectangular shape having a plane shape of 6 mm × 30 mm, a height of 48 mm, and the material is aluminum as described above. The thickness is 0.5 mm, the thickness 0.5
It is manufactured in the above-mentioned shape using an aluminum plate of mm. The lid plate 2 is made of an aluminum plate having a thickness of 1 mm and is made to have a size suitable for being fitted into the opening of the battery case 1. It is a 1 mm circle. The sealing plug 3 for sealing the injection hole has a diameter of 1 mm at the upper end, a diameter of 0.8 mm at the lower end, and has a tapered shape near the lower end. Made of aluminum to be suitable for welding.
【００１７】上記電池ケース１には電極体４が収容さ
れ、蓋板２にはステンレス鋼製でリベット形の負極端子
５がポリプロピレン製の絶縁パッキング６を介して取り
付けられ、上記負極端子５の下部には蓋板２との間にポ
リプロピレン製の絶縁体８を介在させてステンレス鋼製
の座板７が嵌め込まれ、この座板７には電極体４の負極
から引き出されたニッケル製のタブ９の上端部が溶接に
より固定されている。また、電池ケース１の底部には電
極体４の挿入に先立ってポリプロピレン製の絶縁体１０
が配置され、正極端子としての機能を兼ねる電池ケース
１と電極体４の負極との間を絶縁している。上記負極端
子５は、当初リベット形をしていて、その軸部を絶縁パ
ッキング６の透孔に通し、絶縁体８を介して軸部に座板
７を嵌め込んでから、その先端部を押し潰して固定する
ことにより、蓋板２に取り付けられている。The battery case 1 accommodates an electrode body 4, and the lid plate 2 is provided with a rivet-shaped negative electrode terminal 5 made of stainless steel via an insulating packing 6 made of polypropylene. A stainless steel seat plate 7 is fitted to the cover plate 2 with an insulator 8 made of polypropylene interposed therebetween, and the seat plate 7 has a nickel tab 9 drawn out from the negative electrode of the electrode body 4. Are fixed by welding. Prior to the insertion of the electrode body 4, an insulator 10 made of polypropylene is provided at the bottom of the battery case 1.
Are arranged to insulate between the battery case 1 also serving as a positive electrode terminal and the negative electrode of the electrode body 4. The negative electrode terminal 5 is initially in the form of a rivet. The shaft portion is passed through the through hole of the insulating packing 6, the seat plate 7 is fitted into the shaft portion via the insulator 8, and then the front end portion is pushed. It is attached to the cover plate 2 by crushing and fixing.
【００１８】上記電池ケース１と蓋板２は、電池ケース
１の開口部に蓋板２を嵌め込み、電池ケース１の開口端
部と蓋板２の外周部との接合部をレーザー溶接し、電解
液を蓋板２に形設された電解液注入用の注入孔から電池
内に注入した後、上記注入孔にアルミニウム製の封止栓
３を挿入し、封止栓３を蓋板２との接合部にレーザービ
ームを照射してレーザー溶接し、封止栓３を蓋板２に一
体化して注入孔を気密封止している。上記のように電解
液を電池内に注入するのに使用した注入孔に封止栓３を
挿入し、レーザー溶接により注入孔を封止しているの
で、この図３では注入孔は図示されていないが、蓋板２
において封止栓３の挿入されている部分が上記封止栓３
の挿入前に注入孔であった部分である。The battery case 1 and the cover plate 2 are fitted with the cover plate 2 in the opening of the battery case 1, and the joint between the opening end of the battery case 1 and the outer peripheral portion of the cover plate 2 is laser-welded to form an electrolytic cell. After the solution is injected into the battery from the electrolyte solution injection hole formed in the cover plate 2, an aluminum sealing plug 3 is inserted into the injection hole, and the sealing plug 3 is connected to the lid plate 2. A laser beam is applied to the joint to perform laser welding, and the sealing plug 3 is integrated with the lid plate 2 to hermetically seal the injection hole. Since the sealing plug 3 is inserted into the injection hole used to inject the electrolytic solution into the battery as described above, and the injection hole is sealed by laser welding, the injection hole is illustrated in FIG. No, but lid 2
The part where the sealing plug 3 is inserted corresponds to the sealing plug 3
This is the part that was the injection hole before the insertion.
【００１９】この実施例１の電池における電極体４は、
ＬｉＣｏＯ2を活物質とするシート状の正極と黒鉛を活
物質とするシート状の負極とをセパレータを介して渦巻
状に巻回して作製した渦巻状のものからなり、前記のよ
うに、その渦巻状の電極体４の負極からタブ９が引き出
され、電極体４の負極から負極端子５までの電気的接続
は上記タブ９と座板７を介してなされ、電池ケース１は
電極体４の正極と電気的に接続されている。The electrode body 4 in the battery of Example 1
The sheet-shaped positive electrode using LiCoO2 as an active material and the sheet-shaped negative electrode using graphite as an active material are formed in a spiral shape with a separator interposed therebetween, and the spiral shape is formed as described above. The tab 9 is pulled out from the negative electrode of the electrode body 4 having a shape, and the electrical connection from the negative electrode of the electrode body 4 to the negative electrode terminal 5 is made via the tab 9 and the seat plate 7. Is electrically connected to
【００２０】実施例２ 実施例２の角形密閉式蓄電池の正常時の状態を図４に示
し、内圧上昇時の状態を図５に示す。ただし、この図
４、図５とも、実施例２の角形密閉式蓄電池の短辺方向
の縦断面を模式的に示すものであり、これら図４や図５
では、前記の図１や図２の場合と同様に、電池の内部構
成を示していない。Embodiment 2 FIG. 4 shows a normal state of the sealed rectangular storage battery of Embodiment 2, and FIG. 5 shows a state of the internal pressure rise. 4 and 5 schematically show a vertical cross section in the short side direction of the rectangular sealed storage battery of the second embodiment.
Does not show the internal structure of the battery, as in the case of FIGS. 1 and 2 described above.
【００２１】図４に基づいて実施例２の正常時の状態に
ついて説明すると、電池の本体部分はプラスチック製ケ
ース１３に収容されてその外周部が上記プラスチック製
ケース１３で覆われているが、リード体１１の一方の端
部１１ａは上記プラスチック製ケース１３を貫通し、該
プラスチック製ケース１３の内部で電池ケース１とプラ
スチック製ケース１３とに挟まれて電池ケース１の側面
に接触し、リード体１１の他方の端部１１ｂはプラスチ
ック製ケース１３の外部に引き出され、電気導通路を構
成している。なお、負極側については、図示していない
が、一方の端部を負極端子５に接続したリード体の他方
の端部がプラスチック製ケース１３を貫通し、該プラス
チック製ケース１３の外部に引き出される。Referring to FIG. 4, the normal state of the embodiment 2 will be described. The main body of the battery is housed in a plastic case 13 and the outer periphery thereof is covered with the plastic case 13; One end 11 a of the body 11 penetrates the plastic case 13, is sandwiched between the battery case 1 and the plastic case 13 inside the plastic case 13, comes into contact with the side surface of the battery case 1, and The other end 11b of 11 is drawn out of the plastic case 13 to form an electric conduction path. Although not shown, the other end of the lead body having one end connected to the negative electrode terminal 5 penetrates the plastic case 13 and is drawn out of the plastic case 13. .
【００２２】この実施例２の電池に、前記実施例１と同
様に１Ｃの充電電流で連続充電を行ったところ、図５に
示すように電池ケース１の側面が変形し、その電池ケー
ス１の側面の変形に応じてプラスチック製ケース１３の
中央部が外側に向かって押圧されて膨らむことにより、
リード体１１の一方の端部１１ａが電池ケース１の側面
から離れ、電気導通路が遮断されて、電池ケース１の側
面の変形もその時点で停止し、また、電池の破裂や電解
液の漏液に至るようなことはなかった。When the battery of Example 2 was continuously charged with a charging current of 1 C in the same manner as in Example 1, the side surface of the battery case 1 was deformed as shown in FIG. The central portion of the plastic case 13 is pressed outward and swells in accordance with the deformation of the side surface,
One end 11a of the lead body 11 is separated from the side surface of the battery case 1, the electric conduction path is cut off, the deformation of the side surface of the battery case 1 is stopped at that time, and the battery rupture or leakage of the electrolyte is caused. No liquid was found.
【００２３】この実施例２の電池の本体部分の構成は前
記実施例１の場合と同様であって、図３に示す通りであ
る。また、電池ケース１の材質、厚み、リード体１１の
材質、厚みも実施例１の場合と同様で、プラスチック製
ケース１３はポリプロピレン製で、電池ケース１に比べ
て容易に変形するので、この実施例２の電池も前記実施
例１の場合と同様に、５ａｔｍ付近でリード体１１の一
方の端部１１ａが電池ケース１の側面から離れ、電気導
通路が遮断されたものと考えられる。従来の封口体に組
み込み式の電気導通路遮断機構は７〜１０ａｔｍと高い
圧力でしか作動しなかったのに対し、本発明によれば、
２〜５ａｔｍという低い圧力で電気導通路を遮断でき、
電流の遮断を確実に行うことができるので、電気導通路
の遮断に対する信頼性が向上した。しかも、そのような
電気導通路遮断機構を低コストで構築することができ
る。The structure of the main body of the battery of the second embodiment is the same as that of the first embodiment, and is as shown in FIG. The material and thickness of the battery case 1 and the material and thickness of the lead body 11 are the same as those in the first embodiment. The plastic case 13 is made of polypropylene and is easily deformed as compared with the battery case 1. Similarly to the case of the first embodiment, it is considered that the one end 11a of the lead body 11 was separated from the side surface of the battery case 1 near 5 atm, and the electric conduction path was cut off. According to the present invention, while the conventional electric conduction path blocking mechanism built into the sealing body operates only at a high pressure of 7 to 10 atm,
The electric conduction path can be cut off at a low pressure of 2 to 5 atm,
Since the current can be reliably cut off, the reliability of the cutoff of the electric conduction path is improved. Moreover, such an electric conduction path blocking mechanism can be constructed at low cost.
【００２４】また、本発明によれば、蓋板は従来と同様
の厚みでよいので、電池内容積の減少を伴うこともな
い。実施例１の場合、電池の厚みがリード体１１と絶縁
体１２のぶん増えるが、それも５０〜５００μｍ程度で
あり、実施例２に示すようなプラスチック製ケースに収
容するパック電池では、そのような厚み増加は充分に吸
収できるものと考えられる。Further, according to the present invention, since the cover plate may have the same thickness as the conventional one, there is no accompanying reduction in the battery internal volume. In the case of the first embodiment, the thickness of the battery is increased by the lead body 11 and the insulator 12, which is also about 50 to 500 μm. It is considered that a large increase in thickness can be sufficiently absorbed.
【００２５】[0025]
【発明の効果】以上説明したように、本発明では、安価
でかつ信頼性の高い電気導通路遮断機構を備えた角形密
閉式蓄電池を提供することができた。As described above, according to the present invention, it is possible to provide a sealed rectangular battery having an inexpensive and highly reliable electrical conduction path blocking mechanism.
【図１】実施例１の角形密閉式蓄電池の正常時の状態を
模式的に示す縦断面図である。FIG. 1 is a longitudinal sectional view schematically illustrating a normal state of a sealed rectangular storage battery according to a first embodiment.
【図２】実施例１の角形密閉式蓄電池の内圧上昇時の状
態を模式的に示す縦断面図である。FIG. 2 is a longitudinal sectional view schematically showing a state when the internal pressure of the sealed rectangular storage battery of Example 1 is increased.
【図３】実施例１の角形密閉式蓄電池の本体部分を模式
的に示すもので、（ａ）はその平面図で、（ｂ）はその
縦断面図である。FIGS. 3A and 3B schematically show the main body of the sealed rectangular storage battery of Example 1, wherein FIG. 3A is a plan view and FIG. 3B is a longitudinal sectional view.
【図４】実施例２の角形密閉式蓄電池の正常時の状態を
模式的に示す縦断面図である。FIG. 4 is a longitudinal sectional view schematically showing a normal state of the sealed rectangular storage battery according to the second embodiment.
【図５】実施例２の角形密閉式蓄電池の内圧上昇時の状
態を模式的に示す縦断面図である。FIG. 5 is a longitudinal sectional view schematically showing a state in which the internal pressure of the sealed rectangular storage battery of Example 2 is increased.
１ 電池ケース ２ 蓋板 ５ 負極端子 １１ リード体 １１ａ 一方の端部 １２ 絶縁体 １３ プラスチック製ケース DESCRIPTION OF SYMBOLS 1 Battery case 2 Lid plate 5 Negative electrode terminal 11 Lead 11a One end 12 Insulator 13 Plastic case
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10140634AJPH11329406A (en) | 1998-05-22 | 1998-05-22 | Square sealed storage battery |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10140634AJPH11329406A (en) | 1998-05-22 | 1998-05-22 | Square sealed storage battery |
| Publication Number | Publication Date |
|---|---|
| JPH11329406Atrue JPH11329406A (en) | 1999-11-30 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10140634AWithdrawnJPH11329406A (en) | 1998-05-22 | 1998-05-22 | Square sealed storage battery |
| Country | Link |
|---|---|
| JP (1) | JPH11329406A (en) |
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| KR100412917B1 (en)* | 2000-04-03 | 2003-12-31 | 알프스 덴키 가부시키가이샤 | Current breaking element for battery |
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| JP2012252934A (en)* | 2011-06-06 | 2012-12-20 | Gs Yuasa Corp | Battery, power generator, battery drive system, and method for detecting expansion of battery |
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| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination | Free format text:JAPANESE INTERMEDIATE CODE: A300 Effective date:20050802 |