JPH08148135A - Battery with explosion-proof function - Google Patents
Battery with explosion-proof functionInfo
- Publication number
- JPH08148135A JPH08148135A JP6285128A JP28512894A JPH08148135A JP H08148135 A JPH08148135 A JP H08148135A JP 6285128 A JP6285128 A JP 6285128A JP 28512894 A JP28512894 A JP 28512894A JP H08148135 A JPH08148135 A JP H08148135A
- Authority
- JP
- Japan
- Prior art keywords
- terminal cap
- battery
- sealing plate
- valve body
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は防爆機能付き電池に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof battery.
【０００２】[0002]
【従来の技術】ニッケルカドミウム二次電池やニッケル
水素二次電池などに代表されるアルカリ二次電池は、複
数の素電池が樹脂パック内に収納された構造の組電池の
形態で例えばノート型パソコン、移動式電話などの携帯
用電子機器の電源として使用されることが多いが、マン
ガン乾電池の代用として単電池の形態で使用されること
もある。2. Description of the Related Art Alkaline secondary batteries represented by nickel-cadmium secondary batteries and nickel-hydrogen secondary batteries are, for example, notebook computers in the form of an assembled battery having a plurality of unit cells housed in a resin pack. , Is often used as a power source for portable electronic devices such as mobile phones, but may be used in the form of a single cell as a substitute for a manganese dry battery.
【０００３】しかしながら、前記アルカリ二次電池は、
過充電により電池内部にガスが発生して電池内圧が上昇
した際に一定の圧力を越えるとガスを外部に放出させる
ための安全弁が設けられている。すなわち、図５におい
てニッケル正極２１は、カドミウム負極２２との間に合
成樹脂繊維からなるセパレータ２３を介在してスパイラ
ル状に捲回され、有底円筒状の容器２４内に収納されて
いる。アルカリ電解液は、前記容器２４内に収容されて
いる。防爆機能及び正極端子を兼ねる封口部材２５は、
前記容器２４の上部開口部に配置されている。前記封口
部材２５は封口板２６と、弾性を有する弁体２７と、鍔
部にガス抜き孔２８が開口された帽子形状の端子キャッ
プ２９とから構成されている。前記封口板２６は図６に
示すように、上面に円形の溝３０が形成されている。前
記封口板２６は、前記円形溝３０と対向する下面に円形
突起部３１が形成されている。また、前記封口板２６は
中央にガス通過孔３２を有する。前記弁体２７は前記封
口板２６の前記円形溝３０にそのガス通過孔３２を覆う
ように載置されている。前記端子キャップ２９は前記弁
体２７を包囲するように配置され、かつ前記鍔部の縁が
前記封口板２６の前記円形溝３０の周縁に固定されてい
る。なお、前記端子キャップ２９は前記鍔部に形成され
たガス抜き孔２８が前記円形溝３０と対向するように前
記封口板２６上に固定されている。リング状の絶縁性ガ
スケット３３は、前記封口板２６の周縁と前記容器２４
の上部開口部内面の間に配置され、前記上部開口部を内
側に縮径するカシメ加工により前記容器２４に前記封口
部材２５を気密に固定している。正極リード３４は一端
が前記封口板２６の下面に取付けられ、かつ他端が前記
正極２１に取付けられている。However, the alkaline secondary battery is
A safety valve is provided for releasing gas when a certain pressure is exceeded when gas is generated inside the battery due to overcharging and the internal pressure of the battery rises. That is, in FIG. 5, the nickel positive electrode 21 is spirally wound with a separator 23 made of synthetic resin fiber interposed between the nickel positive electrode 21 and the cadmium negative electrode 22, and is housed in a bottomed cylindrical container 24. The alkaline electrolyte is contained in the container 24. The sealing member 25, which also has an explosion-proof function and a positive electrode terminal,
It is arranged in the upper opening of the container 24. The sealing member 25 is composed of a sealing plate 26, a valve body 27 having elasticity, and a cap-shaped terminal cap 29 having a gas vent hole 28 in the flange portion. As shown in FIG. 6, the sealing plate 26 has a circular groove 30 formed on the upper surface. A circular protrusion 31 is formed on the lower surface of the sealing plate 26 facing the circular groove 30. Further, the sealing plate 26 has a gas passage hole 32 in the center. The valve body 27 is placed in the circular groove 30 of the sealing plate 26 so as to cover the gas passage hole 32. The terminal cap 29 is arranged so as to surround the valve body 27, and the edge of the flange portion is fixed to the peripheral edge of the circular groove 30 of the sealing plate 26. The terminal cap 29 is fixed on the sealing plate 26 so that the gas vent hole 28 formed in the collar portion faces the circular groove 30. The ring-shaped insulating gasket 33 is attached to the periphery of the sealing plate 26 and the container 24.
The sealing member 25 is air-tightly fixed to the container 24 by caulking, which is disposed between the inner surfaces of the upper openings of the above, and the inner diameter of the upper openings is reduced. The positive electrode lead 34 has one end attached to the lower surface of the sealing plate 26 and the other end attached to the positive electrode 21.
【０００４】このような構成の電池において、前記電池
内にガスが発生し、ガス圧力が前記封口板２６の前記ガ
ス通過孔３２を通して前記弁体２７に加わると、前記弁
体２７は変形して持ち上げられるため、前記封口板２６
の前記円形溝３０と前記弁体２７との間に隙間が生じ
る。その結果、前記ガスは前記隙間，前記円形溝３０及
び前記ガス抜き孔２８を通して外部へ逃散するため、破
裂を防止することができる。In the battery having such a structure, when gas is generated in the battery and a gas pressure is applied to the valve body 27 through the gas passage hole 32 of the sealing plate 26, the valve body 27 is deformed. Because it can be lifted, the sealing plate 26
A gap is formed between the circular groove 30 and the valve body 27. As a result, the gas escapes to the outside through the gap, the circular groove 30 and the gas vent hole 28, so that the burst can be prevented.
【０００５】しかしながら、前記二次電池が単電池とし
て用いられる場合に、誤って前記端子キャップ２９を下
にして落下させると、前記端子キャップ２９の突出部に
押圧力が加わる。このような押圧力が加わると、前記端
子キャップ２９は前記鍔部の縁のみが前記円形溝３０の
周縁に固定されているため、前記端子キャップ２９の鍔
部より立上った部分３５が前記円形溝３０内に陥没して
前記突出部がつぶれて変形する。その結果、前記弁体２
７が過度に圧縮されるため、弁作動圧が上昇するという
問題点があった。その結果、本来の適正な安全弁の機能
を損なうことになるため、前記二次電池に異常な充電が
施されて電池内にガスが発生した場合や、前記二次電池
が誤って火中に投入された場合に、破裂を生じる恐れが
ある。However, when the secondary battery is used as a unit cell and the terminal cap 29 is accidentally dropped and dropped, a pressing force is applied to the protruding portion of the terminal cap 29. When such a pressing force is applied, only the edge of the flange portion of the terminal cap 29 is fixed to the peripheral edge of the circular groove 30, so that the portion 35 of the terminal cap 29 rising from the flange portion is The protrusion is crushed and deformed by being depressed in the circular groove 30. As a result, the valve body 2
Since 7 is excessively compressed, there is a problem that the valve operating pressure rises. As a result, the proper function of the safety valve will be impaired, so if the secondary battery is abnormally charged and gas is generated in the battery, or the secondary battery is accidentally thrown into a fire. If ruptured, a rupture may occur.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、ユー
ザが誤って落下させた際に端子キャップの突出部が変形
して弁体が過度に圧縮されるのを防止することが可能な
防爆機能付電池を提供しようとするものである。SUMMARY OF THE INVENTION It is an object of the present invention to prevent explosion of a valve body due to deformation of a projecting portion of a terminal cap when the user accidentally drops the valve body. It is intended to provide a functional battery.
【０００７】[0007]
【課題を解決するための手段】本発明の防爆機能付電池
は、容器内に収納され、正極と負極との間にセパレータ
を介装して作製された電極群と、容器内に収納される電
解液と、前記容器の上部開口部に取付けられるガス通過
孔を有する封口板と、前記ガス通過孔を囲むように前記
封口板の外側の面に配置され、鍔部にガス抜き孔を有す
る帽子形状の端子キャップと、前記ガス通過孔を塞ぐよ
うに前記封口板と前記端子キャップ間に圧縮状態で配置
される弾性を有する弁体とを具備し、前記封口板は、前
記弁体及び前記ガス抜き孔と対向する領域を含む面に前
記弁体がガス圧力により上方に持ち上げられた時におい
て前記ガス通過孔と前記ガス抜き孔が互いに連通するよ
うに溝が形成され、かつ前記端子キャップは前記鍔部よ
り立上った部分が前記溝の周縁の一部に当接されている
ことを特徴とするものである。An explosion-proof battery of the present invention is housed in a container, and an electrode group made by interposing a separator between a positive electrode and a negative electrode and housed in the container. An electrolytic solution, a sealing plate having a gas passage hole attached to the upper opening of the container, and a cap arranged on the outer surface of the sealing plate so as to surround the gas passage hole and having a gas vent hole in the collar portion. A terminal cap having a shape, and an elastic valve element arranged in a compressed state between the sealing plate and the terminal cap so as to close the gas passage hole, the sealing plate including the valve element and the gas. A groove is formed on a surface including a region facing the vent hole so that the gas passage hole and the gas vent hole communicate with each other when the valve body is lifted upward by gas pressure, and the terminal cap is The part that rises from the collar part And it is characterized in that it is in contact with the part of the periphery of Kimizo.
【０００８】[0008]
【作用】本発明の防爆機能付電池によれば、端子キャッ
プの鍔部より立上った部分が封口板に形成された溝の周
縁の一部に当接されているため、ユーザが誤って前記電
池を前記端子キャップを下にして落下させて前記端子キ
ャップの突出部に押圧力が加わった際に前記端子キャッ
プの鍔部より立上った部分の前記溝に陥没するのに対す
る強度を向上することができる。その結果、前記端子キ
ャップにより弁体が過度に圧縮されるのを防止すること
ができるため、前記弁体の作動圧が上昇するのを抑制す
ることができる。従って、前記電池が過充電されてガス
が発生し、電池内圧が所望の値まで上昇すると、ガス圧
力が前記封口板のガス通過孔を通して前記弁体に加わ
り、前記弁体は変形して持ち上げられるため、前記弁体
と前記溝との間に隙間が生じる。その結果、前記ガス通
過孔と前記鍔部のガス抜き孔が互いに連通するため、ガ
スを前記ガス抜き孔を通して外部へ逃散させることがで
きる。また、前記電池が誤って火中に投入された際の破
裂を防止することができる。従って、前記電池の安全性
及びを信頼性向上することができる。According to the battery with explosion-proof function of the present invention, since the portion of the terminal cap rising from the flange portion is in contact with a part of the peripheral edge of the groove formed in the sealing plate, the user mistakenly operates. Improves the strength of the battery when the battery is dropped with the terminal cap facing down and when the pressing force is applied to the projecting portion of the terminal cap, the battery rises above the flange of the terminal cap and is depressed into the groove. can do. As a result, it is possible to prevent the valve body from being excessively compressed by the terminal cap, and thus it is possible to suppress an increase in the operating pressure of the valve body. Therefore, when the battery is overcharged to generate gas and the battery internal pressure rises to a desired value, the gas pressure is applied to the valve body through the gas passage hole of the sealing plate, and the valve body is deformed and lifted. Therefore, a gap is created between the valve body and the groove. As a result, since the gas passage hole and the gas vent hole of the collar portion communicate with each other, the gas can escape to the outside through the gas vent hole. Further, it is possible to prevent the battery from bursting when it is accidentally thrown into a fire. Therefore, the safety and reliability of the battery can be improved.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面を参照して詳細
に説明する。 実施例 図１は本発明に係る防爆機能付電池を後述する溝部の最
小半径Ｒｂを有する扇形状部分を横切る線に沿って切断
した状態を示す断面図で、図２は本発明に係る防爆機能
付電池を後述する溝部の最大半径Ｒａを有する扇形状部
分を横切る線に沿って切断した状態を示す断面図であ
る。Embodiments of the present invention will now be described in detail with reference to the drawings. Example FIG. 1 is a cross-sectional view showing a state in which the battery with explosion-proof function according to the present invention is cut along a line crossing a fan-shaped portion having a minimum radius Rb of a groove described later, and FIG. It is sectional drawing which shows the state which cut | disconnected the attached battery along the line which crosses the fan-shaped part which has the maximum radius Ra of the groove part mentioned later.
【００１０】図１及び図２に示すように、正極１は、負
極２との間にセパレータ３を介在してスパイラル状に捲
回されて有底円筒状の容器４内に収納されている。前記
負極２は作製された電極群の最外周に配置されて前記容
器４と電気的に接触している。電解液は、前記容器４内
に収容されている。防爆機能及び端子（例えば正極端
子）を兼ねる封口部材５は、前記容器４の上部開口部に
配置されている。前記封口部材５は、封口板６と、例え
ば硬度が６５°の合成ゴムからなる円筒形の弾性弁体７
と、鍔部の例えば中心から３ｍｍ離れた位置に直径が例
えば０．８ｍｍのガス抜き孔８を有する帽子形状の端子
キャップ９（突出部の直径は例えば０．５ｍｍである）
とから構成されている。前記封口板６は図３及び図４に
示すように、上面に例えば深さが０．５５ｍｍの溝部１
０が形成され、中央に円形のガス通過孔１１を有する円
形板からなる。前記溝部１０は、十文字に配置された最
大半径Ｒａ（例えば３．５ｍｍ）を有する４つの扇形状
の溝と、各最大半径Ｒａを有する扇形状の溝間に配置さ
れた最小半径Ｒｂ（例えば２．５ｍｍ）を有する４つの
扇形状の溝とから構成されている。また、前記封口板６
は下面の前記溝部１０と対向する箇所に突起部１２が形
成されている。前記弾性弁体７は前記封口板６の前記溝
部１０にそのガス通過孔１１を覆うように載置されてい
る。前記端子キャップ９は前記弾性弁体７を包囲し、か
つ前記鍔部の縁がプロジェクション溶接により前記封口
板６の上面に固定されている。前記端子キャップ９は、
そのガス抜き孔８が前記溝部１０の最大半径Ｒａを有す
る扇形状部分と対向され、かつ鍔部より立上った部分９
ａが前記溝部１０の最小半径Ｒｂを有する扇形部分の周
縁に当接されている。リング状の絶縁性ガスケット１３
は、前記封口板６の周縁と前記容器４の上部開口部内面
の間に配置され、前記上部開口部を内側に縮径するカシ
メ加工により前記容器４に前記封口部材５を気密に固定
している。正極リード１４は、一端が前記正極１に取付
けられ、他端が前記封口板６の前記突起部１２に取付け
られている。As shown in FIGS. 1 and 2, the positive electrode 1 is spirally wound with a separator 3 interposed between the positive electrode 1 and the negative electrode 2 and is housed in a bottomed cylindrical container 4. The negative electrode 2 is arranged on the outermost periphery of the prepared electrode group and is in electrical contact with the container 4. The electrolytic solution is contained in the container 4. The sealing member 5, which also has an explosion-proof function and a terminal (for example, a positive electrode terminal), is arranged in the upper opening of the container 4. The sealing member 5 includes a sealing plate 6 and a cylindrical elastic valve body 7 made of, for example, synthetic rubber having a hardness of 65 °.
And a cap-shaped terminal cap 9 having a gas vent hole 8 having a diameter of, for example, 0.8 mm at a position 3 mm away from the center of the flange (the diameter of the protruding portion is, for example, 0.5 mm).
It consists of and. As shown in FIGS. 3 and 4, the sealing plate 6 has a groove portion 1 having a depth of, for example, 0.55 mm on the upper surface.
0 is formed, and is composed of a circular plate having a circular gas passage hole 11 in the center. The groove portion 10 includes four fan-shaped grooves having a maximum radius Ra (for example, 3.5 mm) arranged in a cross shape, and a minimum radius Rb (for example, 2) arranged between the fan-shaped grooves having the respective maximum radii Ra. .5 mm) and four fan-shaped grooves. In addition, the sealing plate 6
A protrusion 12 is formed on the lower surface at a position facing the groove 10. The elastic valve body 7 is placed in the groove portion 10 of the sealing plate 6 so as to cover the gas passage hole 11. The terminal cap 9 surrounds the elastic valve body 7, and the edge of the flange portion is fixed to the upper surface of the sealing plate 6 by projection welding. The terminal cap 9 is
A portion 9 of which the gas vent hole 8 is opposed to the fan-shaped portion having the maximum radius Ra of the groove portion 10 and which stands up from the flange portion.
a is in contact with the peripheral edge of the fan-shaped portion having the minimum radius Rb of the groove portion 10. Ring-shaped insulating gasket 13
Is disposed between the peripheral edge of the sealing plate 6 and the inner surface of the upper opening of the container 4, and the sealing member 5 is hermetically fixed to the container 4 by caulking to reduce the diameter of the upper opening inward. There is. The positive electrode lead 14 has one end attached to the positive electrode 1 and the other end attached to the protrusion 12 of the sealing plate 6.
【００１１】このような構成の防爆機能付電池によれ
ば、前述した図１に示すように端子キャップ９の鍔部よ
り立上った部分９ａが溝部１０の最小半径Ｒｂを有する
扇形形状部分の周縁に当接されているため、ユーザが誤
って前記電池を前記端子キャップ９を下にして落下させ
て前記端子キャップ９に押圧力が加わった際に前記端子
キャップ９の鍔部より立上った部分９ａの前記溝部１０
に陥没するのに対する強度を向上することができる。そ
の結果、前記端子キャップ９により弾性弁体７を過度に
圧縮するのを防止することができるため、前記弁体７の
作動圧が上昇するのを抑制することができる。従って、
前記電池が過充電されてガスが発生し、電池内圧が所望
の値に上昇すると、ガス圧力が前記封口板６のガス通過
孔１１を通して前記弁体７に加わり、前記弁体７は変形
して持ち上げられるため、前記弁体７と前記溝部１０と
の間に隙間が生じる。その結果、前記封口板６のガス通
過孔１１と前記鍔部のガス抜き孔８が連通するため、ガ
スが前記隙間，前記溝部１０及び前記ガス抜き孔８を通
して外部に逃散することができる。また、前記電池が誤
って火中に投入された際の破裂を防止することができ
る。このため、前記電池の安全性及びを信頼性向上する
ことができる。According to the battery with explosion-proof function having such a structure, as shown in FIG. 1, the portion 9a rising from the flange portion of the terminal cap 9 is a fan-shaped portion having the minimum radius Rb of the groove portion 10. Since it is in contact with the peripheral edge, when the user accidentally drops the battery with the terminal cap 9 down and a pressing force is applied to the terminal cap 9, the battery rises from the flange portion of the terminal cap 9. The groove portion 10 of the open portion 9a
It is possible to improve the strength against depression. As a result, it is possible to prevent the elastic valve body 7 from being excessively compressed by the terminal cap 9, so that it is possible to suppress an increase in the operating pressure of the valve body 7. Therefore,
When the battery is overcharged and gas is generated and the battery internal pressure rises to a desired value, the gas pressure is applied to the valve body 7 through the gas passage hole 11 of the sealing plate 6, and the valve body 7 is deformed. Since it is lifted, a gap is created between the valve body 7 and the groove 10. As a result, the gas passage hole 11 of the sealing plate 6 and the gas vent hole 8 of the collar portion communicate with each other, so that the gas can escape to the outside through the gap, the groove portion 10 and the gas vent hole 8. Further, it is possible to prevent the battery from bursting when it is accidentally thrown into a fire. Therefore, the safety and reliability of the battery can be improved.
【００１２】本発明に係わる防爆機能付電池の優れた特
性は以下に示す実験により確認された。まず、下記構成
の正極１、負極２、ポリアミド繊維製不織布からなるセ
パレータ３、７規定のＫＯＨ及び１規定のＬｉＯＨから
なるアルカリ電解液を用いて前述した図１に示す構造を
有するＡＡサイズのニッケルカドミウム二次電池を組み
立てた。前記正極１は、活物質としての水酸化ニッケル
粉末と、酸化コバルトと、高分子結着剤とを含むペース
トを調製し、これをフェルト状金属繊維多孔体に充填
し、乾燥した後、ローラプレスで圧延することにより作
製された。一方、前記負極２は、活物質としての酸化カ
ドミウムと、ニッケル粉末と、高分子結着剤とを含むペ
ーストを調製し、前記ペーストをパンチドメタルに塗布
し、これを乾燥させた後、ローラプレスで圧延すること
により作製された。また、前記電池の前記封口板６の前
記突起部１２から前記端子キャップ９の突出部までの高
さを３ｍｍにした。The excellent characteristics of the explosion-proof battery according to the present invention were confirmed by the following experiments. First, an AA size nickel having the structure shown in FIG. 1 described above using a positive electrode 1 and a negative electrode 2 having the following configurations, a separator 3 made of a polyamide fiber non-woven fabric, an alkaline electrolyte made of 7N KOH and 1N LiOH. A cadmium secondary battery was assembled. The positive electrode 1 is prepared by preparing a paste containing nickel hydroxide powder as an active material, cobalt oxide, and a polymeric binder, filling the paste into a felt-like metal fiber porous body, and drying the paste, followed by roller pressing. It was made by rolling in. On the other hand, for the negative electrode 2, a paste containing cadmium oxide as an active material, nickel powder, and a polymeric binder is prepared, the paste is applied to a punched metal, and the paste is dried, and then the roller is used. It was produced by rolling with a press. Further, the height from the protruding portion 12 of the sealing plate 6 of the battery to the protruding portion of the terminal cap 9 is set to 3 mm.
【００１３】比較例として半径が３．５ｍｍの円形の溝
が形成された封口板を用いた以外、実施例と同様なＡＡ
サイズのニッケルカドミウム二次電池を用意した。得ら
れた実施例及び比較例の二次電池を端子キャップを下に
して１ｍの高さから３回落下させた後、弁作動圧を測定
し、弁作動圧比（落下前の弁作動圧を１００とする）を
求めた。その後、これらの二次電池を分解して前記封口
板の突起部から前記端子キャップの突出部までの高さを
測定し、その結果から落下により減少した高さを求め、
これと弁作動圧比を下記表１に示す。As a comparative example, an AA similar to that of the example except that a sealing plate having a circular groove with a radius of 3.5 mm was used.
A nickel cadmium secondary battery of a size was prepared. The obtained secondary batteries of Examples and Comparative Examples were dropped three times from a height of 1 m with the terminal cap facing down, and then the valve operating pressure was measured to determine the valve operating pressure ratio (the valve operating pressure before dropping was 100%). And asked). After that, these secondary batteries were disassembled to measure the height from the protruding portion of the sealing plate to the protruding portion of the terminal cap, and the height reduced by dropping from the result was obtained,
This and the valve operating pressure ratio are shown in Table 1 below.
【００１４】 表１ 落下により減少した高さ（ｍｍ） 弁作動圧比 実施例 ０．２５ １３５ 比較例 ０．４８ １９０ 表１から明らかなように、弾性弁体及び鍔部のガス抜き
孔と対向する領域を含む面に前記弾性弁体がガス圧力に
より上方に持ち上げられた時において封口板のガス通過
孔と前記ガス抜き孔が連通するように溝が形成された封
口板を備え、かつ端子キャップの鍔部から立上った部分
が前記溝の周縁の一部に当接されている実施例の電池
は、端子キャップの突出部がわずかにつぶれたが、弁作
動圧の上昇度合いが低いことがわかる。これに対し、弾
性弁体及び鍔部のガス抜き孔と対向する領域を含む円形
の溝が形成された封口板を備え、端子キャップの鍔部の
縁が前記円形溝の周縁に当接されている比較例の電池
は、端子キャップの鍔部から立上った部分が前記円形溝
に陥没して突出部がつぶれて変形し、弁作動圧の上昇度
合いが大きいことがわかる。Table 1 Height (mm) Reduced by Dropping Valve Operating Pressure Ratio Example 0.25 135 Comparative Example 0.48 190 As is clear from Table 1, the elastic valve body and the gas vent hole of the collar portion are opposed to each other. The surface including the region is provided with a sealing plate in which a groove is formed so that the gas passage hole and the gas vent hole of the sealing plate communicate with each other when the elastic valve body is lifted upward by gas pressure, and In the battery of the embodiment in which the portion rising from the flange portion is in contact with a part of the peripheral edge of the groove, the protruding portion of the terminal cap is slightly crushed, but the degree of increase in valve operating pressure is low. Recognize. On the other hand, a sealing plate having a circular groove including a region facing the elastic valve body and the gas vent hole of the collar portion is provided, and the edge of the collar portion of the terminal cap is brought into contact with the peripheral edge of the circular groove. It can be seen that in the battery of the comparative example, the portion rising from the flange portion of the terminal cap is depressed in the circular groove, the protruding portion is crushed and deformed, and the degree of increase in valve operating pressure is large.
【００１５】なお、前記実施例では、封口板に十文字に
配置された最大半径Ｒａを有する４つの扇形状の溝と、
各最大半径Ｒａを有する扇形状の溝間に配置された最小
半径Ｒｂを有する４つの扇形状の溝とからなる溝部を形
成したが、前記溝部の形状は対称性を持たせたり、円形
にする必要はなく、例えば、最小半径Ｒｂを有する円形
溝に半円形状の溝が形成されたものや、１辺の長さが最
大半径Ｒａの２倍と等しい正方形の四隅が窪み、対角線
上を横切る窪み間の距離が最小半径Ｒｂの２倍と等しい
ものを用いても良い。In the above embodiment, four fan-shaped grooves having a maximum radius Ra arranged in a cross shape on the sealing plate,
A groove portion was formed by four fan-shaped grooves having a minimum radius Rb arranged between fan-shaped grooves having the maximum radius Ra, and the shape of the groove portions is symmetrical or circular. There is no need, for example, a semicircular groove formed in a circular groove having a minimum radius Rb, or four corners of a square whose one side length is twice the maximum radius Ra are recessed and cross a diagonal line. The distance between the depressions may be equal to twice the minimum radius Rb.
【００１６】前記実施例では端子キャップの鍔部に形成
するガス抜き孔の数を１個にしたが、前記ガス抜き孔は
複数個形成しても良い。前記実施例では弾性を有する弁
体として形状が円筒形のものを用いたが、つりがね形の
ものを用いても良い。In the above embodiment, the number of the gas vent holes formed in the collar portion of the terminal cap is one, but a plurality of the gas vent holes may be formed. In the above-mentioned embodiment, the valve element having elasticity has a cylindrical shape, but it may have a hanging shape.
【００１７】前記実施例では円筒形のアルカリ二次電池
に適用して説明したが、角形のアルカリ二次電池にも同
様に適用することができる。前記実施例ではアルカリ二
次電池に適用して説明したが、リチウムイオン二次電
池、リチウム電池にも同様に適用することができる。In the above-mentioned embodiment, the description is made by applying to the cylindrical alkaline secondary battery, but it can be similarly applied to the prismatic alkaline secondary battery. In the above-mentioned embodiment, the explanation was made by applying to the alkaline secondary battery, but the same can be applied to the lithium ion secondary battery and the lithium battery.
【００１８】[0018]
【発明の効果】以上詳述したように本発明の防爆機能付
電池によれば、ユーザが誤って落下させた際に端子キャ
ップが変形して弁体が過度に圧縮されるのを防止するこ
とができ、弁作動圧の上昇を抑制できるため、落下され
た電池が誤って火中に投入された際に破裂するのを防止
することができ、安全性及び信頼性を向上することがで
きるという顕著な効果を奏する。As described in detail above, according to the battery with explosion-proof function of the present invention, it is possible to prevent the valve cap from being excessively compressed due to the deformation of the terminal cap when the user accidentally drops the battery. Since the rise of the valve operating pressure can be suppressed, it is possible to prevent the dropped battery from exploding when accidentally thrown into fire, and it is possible to improve safety and reliability. Has a remarkable effect.
【図１】本発明に係わる防爆機能付電池を示す断面図。FIG. 1 is a cross-sectional view showing an explosion-proof battery according to the present invention.
【図２】本発明に係わる防爆機能付電池を示す断面図。FIG. 2 is a cross-sectional view showing an explosion-proof battery according to the present invention.
【図３】本発明に係わる防爆機能付電池に組込まれる封
口部材を示す斜視図。FIG. 3 is a perspective view showing a sealing member incorporated in the explosion-proof battery according to the present invention.
【図４】図１の部分上面図。FIG. 4 is a partial top view of FIG.
【図５】従来の防爆機能付電池を示す断面図。FIG. 5 is a cross-sectional view showing a conventional battery with explosion-proof function.
【図６】図５の電池に組込まれる封口板を示す斜視図。6 is a perspective view showing a sealing plate incorporated in the battery of FIG.
１…正極、２…負極、３…セパレータ、４…容器、５…
封口部材、６…封口板、７…弾性弁体、８…ガス抜き
孔、９…端子キャップ、９ａ…鍔部より立上った部分、
１０…溝部、１１…ガス通過孔、１３…絶縁ガスケッ
ト。1 ... Positive electrode, 2 ... Negative electrode, 3 ... Separator, 4 ... Container, 5 ...
Sealing member, 6 ... Sealing plate, 7 ... Elastic valve element, 8 ... Gas vent hole, 9 ... Terminal cap, 9a ... Portion rising from flange portion,
10 ... Groove portion, 11 ... Gas passage hole, 13 ... Insulation gasket.
Claims (1)
セパレータを介装して作製された電極群と、容器内に収
納される電解液と、前記容器の上部開口部に取付けられ
るガス通過孔を有する封口板と、前記ガス通過孔を囲む
ように前記封口板の外側の面に配置され、鍔部にガス抜
き孔を有する帽子形状の端子キャップと、前記ガス通過
孔を塞ぐように前記封口板と前記端子キャップ間に圧縮
状態で配置される弾性を有する弁体とを具備した防爆機
能付電池において、 前記封口板は、前記弁体及び前記ガス抜き孔と対向する
領域を含む面に前記弁体がガス圧力により上方に持ち上
げられた時において前記ガス通過孔と前記ガス抜き孔が
互いに連通するように溝が形成され、かつ前記端子キャ
ップは前記鍔部より立上った部分が前記溝の周縁の一部
に当接されていることを特徴とする防爆機能付電池。1. An electrode group housed in a container, prepared by interposing a separator between a positive electrode and a negative electrode, an electrolytic solution housed in the container, and attached to an upper opening of the container. A sealing plate having a gas passage hole, a cap-shaped terminal cap arranged on the outer surface of the sealing plate so as to surround the gas passage hole, and having a gas vent hole in the flange portion, and the gas passage hole being closed. In the battery with explosion-proof function, comprising: the sealing plate and an elastic valve body arranged in a compressed state between the terminal cap, the sealing plate includes a region facing the valve body and the gas vent hole. A groove is formed on the surface so that the gas passage hole and the gas vent hole communicate with each other when the valve body is lifted up by the gas pressure, and the terminal cap is a portion rising from the flange portion. Is one of the edges of the groove Explosion-proof function with cell characterized by being in contact with the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6285128A JPH08148135A (en) | 1994-11-18 | 1994-11-18 | Battery with explosion-proof function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6285128A JPH08148135A (en) | 1994-11-18 | 1994-11-18 | Battery with explosion-proof function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08148135A true JPH08148135A (en) | 1996-06-07 |
Family
ID=17687480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6285128A Pending JPH08148135A (en) | 1994-11-18 | 1994-11-18 | Battery with explosion-proof function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08148135A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006004145A1 (en) | 2004-07-02 | 2006-01-12 | Toyota Jidosha Kabushiki Kaisha | Nickel-hydrogen storage battery |
| WO2006004143A1 (en) * | 2004-07-02 | 2006-01-12 | Toyota Jidosha Kabushiki Kaisha | Nickel-hydrogen accumulator battery |
| WO2008124989A1 (en) | 2007-04-16 | 2008-10-23 | Byd Company Limited | A safety valve for battery |
| CN106492376A (en) * | 2016-12-26 | 2017-03-15 | 无锡中鼎物流设备有限公司 | A kind of extinguishing device for battery storehouse |
| CN111727516A (en) * | 2018-02-16 | 2020-09-29 | Fdk株式会社 | Sealing body and battery |
-
1994
- 1994-11-18 JP JP6285128A patent/JPH08148135A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7758994B2 (en) | 2004-07-02 | 2010-07-20 | Toyota Jidosha Kabushiki Kaisha | Nickel metal hydride storage battery with a safety valve for relieving excess gas pressure in the battery when the safety valve is open, the safety valve having a hydrogen-permeable valve member for allowing hydrogen-gas leakage therethrough when the safety valve is closed |
| WO2006004143A1 (en) * | 2004-07-02 | 2006-01-12 | Toyota Jidosha Kabushiki Kaisha | Nickel-hydrogen accumulator battery |
| JPWO2006004143A1 (en) * | 2004-07-02 | 2008-04-24 | トヨタ自動車株式会社 | Nickel metal hydride storage battery |
| WO2006004145A1 (en) | 2004-07-02 | 2006-01-12 | Toyota Jidosha Kabushiki Kaisha | Nickel-hydrogen storage battery |
| JP4770735B2 (en) * | 2004-07-02 | 2011-09-14 | トヨタ自動車株式会社 | Nickel metal hydride storage battery |
| US7807282B2 (en) | 2004-07-02 | 2010-10-05 | Toyota Jidosha Kabushiki Kaisha | Nickel-metal hydride storage battery |
| WO2008124989A1 (en) | 2007-04-16 | 2008-10-23 | Byd Company Limited | A safety valve for battery |
| JP2010524181A (en) * | 2007-04-16 | 2010-07-15 | ビーワイディー カンパニー リミテッド | New battery safety valve |
| EP2137777A4 (en) * | 2007-04-16 | 2010-06-02 | Byd Co Ltd | A safety valve for battery |
| EP2137777A1 (en) * | 2007-04-16 | 2009-12-30 | Byd Company Limited | A safety valve for battery |
| CN106492376A (en) * | 2016-12-26 | 2017-03-15 | 无锡中鼎物流设备有限公司 | A kind of extinguishing device for battery storehouse |
| CN111727516A (en) * | 2018-02-16 | 2020-09-29 | Fdk株式会社 | Sealing body and battery |
| CN111727516B (en) * | 2018-02-16 | 2023-12-05 | Fdk株式会社 | Sealing body and battery |
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