JPH08153496A - Battery provided with explosionproof function - Google Patents
Battery provided with explosionproof functionInfo
- Publication number
- JPH08153496A JPH08153496A JP6292549A JP29254994A JPH08153496A JP H08153496 A JPH08153496 A JP H08153496A JP 6292549 A JP6292549 A JP 6292549A JP 29254994 A JP29254994 A JP 29254994A JP H08153496 A JPH08153496 A JP H08153496A
- Authority
- JP
- Japan
- Prior art keywords
- sealing plate
- vent hole
- battery
- gas vent
- 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.)
- Granted
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】ノート型パソコン、ビデオカメラ、移動
式電話などの携帯用電子機器の需要が増加している。こ
れらの携帯用電子機器の電源としては、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のアルカリ二
次電池、リチウムイオン二次電池、ニッケル亜鉛二次電
池、アルカリ電池、リチウム電池が用いられている。2. Description of the Related Art Demand for portable electronic devices such as laptop computers, video cameras and mobile phones is increasing. As power sources for these portable electronic devices, alkaline secondary batteries such as nickel-cadmium secondary batteries and nickel-hydrogen secondary batteries, lithium-ion secondary batteries, nickel-zinc secondary batteries, alkaline batteries, lithium batteries are used. There is.
【０００３】しかしながら、前記二次電池の場合には過
充電により、また、前記一次電池の場合には過放電や誤
充電により電池内部にガスが発生し、これにより電池内
圧が上昇するため、封口板が吹き飛ぶ、つまり破裂を生
じるという問題点があった。However, gas is generated inside the battery due to overcharge in the case of the secondary battery, and overdischarge or erroneous charge in the case of the primary battery, which increases the internal pressure of the battery. There was a problem that the board blows off, that is, it bursts.
【０００４】このようなことからこれらの電池には、ガ
ス発生により電池内圧が上昇した際にガスを外部に放出
させるための安全弁が設けられている。前記安全弁を備
えた電池としては、例えば図４に示す構造を有するもの
が知られている。正極２１は、負極２２との間にセパレ
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。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は中央に円形のガス抜き孔
２６を有する円形の封口板２７と、安全弁としての弾性
材料からなる弾性弁体２８と、ガス抜き孔２９が開口さ
れた帽子形状の端子キャップ３０とから構成されてい
る。前記弾性弁体２８は前記封口板２７の上面にそのガ
ス抜き孔２６を覆うように載置されている。前記端子キ
ャップ３０は前記弾性弁体２８を包囲するように配置さ
れ、溶接により前記封口板２７の上面に固定されてい
る。リング状の絶縁性ガスケット３１は、前記封口板２
７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。リードタブのリード（図示しない）は前記正極２１
に取り付けられている。前記リードタブのタブ３２は前
記封口板２７の下面に取付けられ、かつ中央付近が前記
ガス抜き孔２６の下方を通過する。前記リードタブは例
えばニッケルから形成されている。For these reasons, these batteries are provided with a safety valve for releasing the gas to the outside when the internal pressure of the battery rises due to the generation of gas. As a battery provided with the safety valve, for example, one having a structure shown in FIG. 4 is known. The positive electrode 21 is spirally wound with the separator 23 interposed between the positive electrode 21 and the negative electrode 22, and is housed in a bottomed cylindrical container 24. The electrolytic solution is contained in the container 24. A sealing member 25 having an explosion-proof function and a positive electrode terminal is arranged in the upper opening of the container 24. The sealing member 25 includes a circular sealing plate 27 having a circular gas vent hole 26 in the center, an elastic valve body 28 made of an elastic material as a safety valve, and a cap-shaped terminal cap 30 having a gas vent hole 29. It consists of The elastic valve body 28 is mounted on the upper surface of the sealing plate 27 so as to cover the gas vent hole 26. The terminal cap 30 is arranged so as to surround the elastic valve body 28, and is fixed to the upper surface of the sealing plate 27 by welding. The ring-shaped insulating gasket 31 is used for the sealing plate 2
The sealing member 25 is air-tightly fixed to the container 24 by caulking which is arranged between the peripheral edge of the container 7 and the inner surface of the upper opening of the container 24 and reduces the diameter of the upper opening inward. The lead (not shown) of the lead tab is the positive electrode 21.
Attached to. The tab 32 of the lead tab is attached to the lower surface of the sealing plate 27, and the vicinity of the center passes below the gas vent hole 26. The lead tab is made of nickel, for example.
【０００５】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２７の前記ガ
ス抜き孔２６を通して前記弾性弁体２８に加わると、前
記弾性弁体２８は変形して持ち上げられるため、前記封
口板２７との間に隙間が生じる。その結果、前記ガスが
前記隙間及び前記ガス抜き孔２９から外部へ逃散するた
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 gas pressure is applied to the elastic valve body 28 through the gas vent hole 26 of the sealing plate 27, the elastic valve body 28 is deformed. Therefore, a gap is formed between the sealing plate 27 and the sealing plate 27. As a result, the gas escapes from the gap and the gas vent hole 29 to the outside, so that the burst can be prevented.
【０００６】ところで、前述した安全弁を備えた電池は
前記リードタブで前記正極２１と前記封口部材２５との
導通を確保することにより前記封口部材２５を正極端子
として用いる構造になっている。前記タブ３２の幅が狭
すぎると導通が低下して電池性能が劣るため、前記タブ
３２の幅は前記封口板２７の前記ガス抜き孔２６の径よ
りも大きくなっている。しかしながら、ユーザが前記電
池を誤って火中に投入することにより前記電池内の温度
が極めて高温になり、前記電池内にガスが発生し、ガス
圧力が急激に上昇すると、前記ガス圧力により前記タブ
３２が前記封口板２７の下面に押し付けられて前記ガス
抜き孔２６を塞ぐため、前記安全弁が作動せず、破裂を
生じるという問題点があった。また、ユーザが前記電池
を誤って落下させ、この時に前記電極群が前記封口板２
７に向かって移動されて前記電極群により前記タブ３２
が前記封口板２７に押付けられると、前記タブ３２の前
記ガス抜き孔２６と対向する箇所が折れ曲がって前記封
口板２７の前記ガス抜き孔２６に挿入されるため、前記
ガス抜き孔２６が塞がれる。このような状態の電池にお
いて例えば過充電、過放電等によりガスが発生すると、
破裂を生じるという問題点があった。By the way, the battery provided with the above-mentioned safety valve has a structure in which the sealing member 25 is used as a positive electrode terminal by ensuring conduction between the positive electrode 21 and the sealing member 25 by the lead tab. If the width of the tab 32 is too narrow, the conduction is lowered and the battery performance is deteriorated. Therefore, the width of the tab 32 is larger than the diameter of the gas vent hole 26 of the sealing plate 27. However, when the user mistakenly throws the battery into a fire, the temperature inside the battery becomes extremely high, gas is generated in the battery, and the gas pressure rises sharply. Since 32 is pressed against the lower surface of the sealing plate 27 to close the gas vent hole 26, there is a problem that the safety valve does not operate and bursts. In addition, the user accidentally drops the battery, and at this time, the electrode group is closed by the sealing plate 2.
7 toward the tab 32 by the electrode group.
When is pressed against the sealing plate 27, the portion of the tab 32 facing the gas vent hole 26 is bent and inserted into the gas vent hole 26 of the seal plate 27, so that the gas vent hole 26 is closed. Be done. In a battery in such a state, if gas is generated due to overcharge, overdischarge, etc.,
There was a problem of causing a burst.
【０００７】[0007]
【発明が解決しようとする課題】本発明の目的は、ユー
ザの誤使用による破裂が防止された防爆機能付き電池を
提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a battery with an explosion-proof function, which is prevented from bursting due to misuse by a user.
【０００８】[0008]
【課題を解決するための手段】本発明に係わる防爆機能
付き電池は、容器内に収納され、かつ正極と負極との間
にセパレータを介装して作製された電極群と、前記容器
の開口部に取付けられたガス抜き孔を有する封口板と、
前記封口板の外側の面に前記ガス抜き孔を囲むように取
付けられた端子と、前記封口板と前記端子との間に前記
ガス抜き孔を塞ぐように配置された安全弁と、一端が前
記正極もしくは前記負極に取付けられ、かつ他端が前記
電極群と対向する前記封口板面に取付けられた帯状のリ
ードとを備え、かつ前記封口板は前記電極群と対向する
と共に前記ガス抜き孔の周縁に位置する複数の突起を有
することを特徴とするものである。The battery with explosion-proof function according to the present invention comprises an electrode group which is housed in a container and is made by interposing a separator between a positive electrode and a negative electrode, and an opening of the container. A sealing plate having a gas vent hole attached to the section,
A terminal attached to the outer surface of the sealing plate so as to surround the gas vent hole, a safety valve disposed between the sealing plate and the terminal so as to close the gas vent hole, and one end of which is the positive electrode. Alternatively, a strip-shaped lead attached to the negative electrode and having the other end attached to the surface of the sealing plate facing the electrode group, the sealing plate facing the electrode group and a peripheral edge of the gas vent hole. It has a plurality of protrusions located at.
【０００９】前記複数の突起は、前記電池内が極めて高
温になり、これにより前記電池内にガスが発生した際に
熱及びガス圧力により変形せず、かつ電解液と反応しな
い材料から形成されることが好ましい。このような材料
としては、ニッケル、ニッケルメッキが施された鋼板を
挙げることができる。前記帯状リードは、例えばニッケ
ルや、ニッケルメッキ鋼板から形成することができる。The plurality of protrusions are formed of a material which is not deformed by heat and gas pressure when gas is generated in the battery due to extremely high temperature in the battery and does not react with the electrolytic solution. It is preferable. Examples of such a material include nickel and a nickel-plated steel plate. The strip-shaped lead can be formed of, for example, nickel or a nickel-plated steel plate.
【００１０】[0010]
【作用】本発明の防爆機能付き電池によれば、ユーザが
誤って火中に投入する等により容器内の温度が極めて高
温になると、前記容器内にガスが発生してガス圧力が急
激に上昇する。このガス圧力により帯状リードが封口板
に向かう方向に押し上げられた際に、前記封口板は前記
電極群と対向すると共に前記ガス抜き孔の周縁に位置す
る複数の突起を有するため、押し上げられた帯状リード
は前記複数の突起の下端に当接する。従って、前記複数
の突起が前記帯状リードの上方への移動を規制するスト
ッパとして機能するため、前記帯状リードにより前記ガ
ス抜き孔が塞がれるのを防止することができる。その結
果、前記容器内のガスは前記封口板と前記突起及び前記
帯状リードで区画された空間と、前記封口板の前記ガス
抜き孔とを通して安全弁に圧力を加えてこれを作動させ
るため、前記ガスは外部へ逃散することができ、破裂を
防止することができる。According to the battery with explosion-proof function of the present invention, when the temperature in the container becomes extremely high due to the user accidentally throwing it into a fire, gas is generated in the container and the gas pressure rapidly rises. To do. When the strip-shaped lead is pushed up in the direction toward the sealing plate by the gas pressure, the sealing plate has a plurality of protrusions facing the electrode group and located at the periphery of the gas vent hole, so that the strip-shaped pushed-up strip is pushed up. The lead contacts the lower ends of the plurality of protrusions. Therefore, since the plurality of protrusions function as stoppers for restricting upward movement of the strip-shaped lead, it is possible to prevent the gas vent hole from being blocked by the strip-shaped lead. As a result, the gas in the container operates by applying pressure to the safety valve through the space defined by the sealing plate, the protrusion and the strip-shaped lead, and the gas vent hole of the sealing plate, so that the gas Can escape to the outside and prevent rupture.
【００１１】また、ユーザが前記電池を誤って落下さ
せ、これにより電極群が前記封口板に向かって移動され
ると、前記電極群により前記帯状リードが前記封口板に
向かう方向に移動されて前記複数の突起の下端に当接す
る。その結果、前記帯状リードがこれらの突起により支
持されるため、前記帯状リードの前記ガス抜き孔と対向
する箇所が折れ曲がって前記ガス抜き孔に挿入されるの
を防止することができ、前記ガス抜き孔が塞がれるのを
回避することができる。従って、前記電池において例え
ば過充電、過放電等によりガスが発生した際に、破裂を
生じるのを防止することができる。When the user accidentally drops the battery and moves the electrode group toward the sealing plate, the electrode group moves the strip-shaped lead in the direction toward the sealing plate. It abuts the lower ends of the plurality of protrusions. As a result, since the strip-shaped lead is supported by these protrusions, it is possible to prevent the portion of the strip-shaped lead that faces the gas vent hole from bending and being inserted into the gas vent hole. It is possible to avoid blocking the holes. Therefore, when gas is generated in the battery due to overcharge, overdischarge, or the like, it is possible to prevent the battery from bursting.
【００１２】[0012]
【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き電池を示す断面図であ
る。Embodiments of the present invention will now be described in detail with reference to the drawings. EXAMPLE FIG. 1 is a sectional view showing a battery with an explosion-proof function according to the present invention.
【００１３】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、円形の封口板６と、安全弁としての例えば合成
ゴムからなる弾性弁体７と、ガス抜き孔８が開口された
帽子形状の端子キャップ９とから構成されている。前記
封口板６は、例えば図２に示すように中央に直径が３ｍ
ｍの円形のガス抜き孔１０が開口されており、下面の前
記ガス抜き孔１０の周縁に例えばニッケルからなる３個
の円柱形突起１１が点対称に形成されている。前記各突
起１１の半径は、例えば１ｍｍである。前記弾性弁体７
は前記封口板６の上面にそのガス抜き孔１０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を包囲するように配置され、溶接により前記封口板６
の上面に固定されている。リング状の絶縁性ガスケット
１２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。帯状リードとしてのリードタブ１３のタ
ブ１４は例えば長さが１５ｍｍで、幅が４ｍｍのニッケ
ル板から形成されている。前記タブ１４は前記封口板６
の下面に取付けられ、中央付近が前記ガス抜き孔１０の
下方を通過する。前記リードタブ１３のリード１５は、
例えばニッケルから形成され、図３に示すように前記正
極１の長手方向に沿う一方側の端部に取付けられてい
る。The positive electrode 1 is spirally wound with the separator 3 interposed between the positive electrode 1 and the negative electrode 2, and has a bottomed cylindrical container 4.
Is housed inside. 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 that also has an explosion-proof function and a terminal (for example, a positive electrode terminal) is
It is arranged in the upper opening of the container 4. The sealing member 5 is composed of a circular sealing plate 6, an elastic valve body 7 made of, for example, synthetic rubber as a safety valve, and a cap-shaped terminal cap 9 having a gas vent hole 8 opened. The sealing plate 6 has, for example, a diameter of 3 m in the center as shown in FIG.
A circular gas vent hole 10 of m is opened, and three cylindrical projections 11 made of nickel, for example, are formed point-symmetrically on the peripheral edge of the gas vent hole 10 on the lower surface. The radius of each protrusion 11 is, for example, 1 mm. The elastic valve body 7
Is placed on the upper surface of the sealing plate 6 so as to cover the gas vent hole 10. The terminal cap 9 is arranged so as to surround the elastic valve body 7, and is welded to the sealing plate 6.
It is fixed on the upper surface of. The ring-shaped insulating gasket 12 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 is attached to the container 4 by caulking to reduce the diameter of the upper opening inward. 5 is fixed airtightly. The tab 14 of the lead tab 13 as a strip-shaped lead is formed of a nickel plate having a length of 15 mm and a width of 4 mm, for example. The tab 14 is the sealing plate 6
It is attached to the lower surface of the, and the vicinity of the center passes below the gas vent hole 10. The lead 15 of the lead tab 13 is
For example, it is made of nickel and is attached to one end of the positive electrode 1 along the longitudinal direction as shown in FIG.
【００１４】このような構成の防爆機能付き電池によれ
ば、ユーザが誤って火中に投入する等により電池内の温
度が極めて高温になると、前記電池内にガスが発生して
ガス圧力が急激に上昇する。このガス圧力によりリード
タブ１３のタブ１４が封口板６に向かう方向に押し上げ
られた際に、前記封口板６は前記電極群と対向すると共
に前記ガス抜き孔１０の周縁に位置する複数の突起１１
を有するため、押し上げられたタブ１４は前記複数の突
起１１の下端に当接する。従って、前記複数の突起１１
が前記タブ１４の上方への移動を規制するストッパとし
て機能するため、前記タブ１４により前記ガス抜き孔１
０が塞がれるのを防止することができる。その結果、前
記電池内のガスは前記封口板６と前記突起１１及び前記
タブ１４で区画された空間と、前記封口板６の前記ガス
抜き孔１０とを通して弾性弁体７に圧力を加えるため、
前記弾性弁体７が変形して持ち上げられ、前記封口板６
との間に隙間が生じる。このため、前記ガスは前記隙間
及び端子キャップ９のガス抜き孔８から外部へ逃散し、
破裂を防止することができる。According to the explosion-proof battery having such a structure, when the temperature inside the battery becomes extremely high due to the user accidentally throwing it into a fire, gas is generated in the battery and the gas pressure is rapidly increased. Rise to. When the tab 14 of the lead tab 13 is pushed up by the gas pressure in the direction toward the sealing plate 6, the sealing plate 6 faces the electrode group and a plurality of protrusions 11 located at the periphery of the gas vent hole 10.
Thus, the pushed up tab 14 contacts the lower ends of the plurality of protrusions 11. Therefore, the plurality of protrusions 11
Functions as a stopper that restricts upward movement of the tab 14, so that the tab 14 allows the gas vent hole 1 to move.
It is possible to prevent 0 from being blocked. As a result, the gas in the battery applies pressure to the elastic valve body 7 through the space defined by the sealing plate 6, the protrusions 11 and the tabs 14, and the gas vent hole 10 of the sealing plate 6,
The elastic valve body 7 is deformed and lifted, and the sealing plate 6
There is a gap between and. Therefore, the gas escapes from the gap and the gas vent hole 8 of the terminal cap 9 to the outside,
Explosion can be prevented.
【００１５】また、ユーザが前記電池を誤って落下さ
せ、これにより電極群が前記封口板６に向かって移動さ
れると、前記電極群により前記タブ１４が前記封口板６
に向かう方向に移動されて前記複数の突起１１の下端に
当接する。その結果、前記タブ１４がこれらの突起１１
により支持されるため、前記タブ１４の前記ガス抜き孔
１０と対向する箇所が折れ曲がって前記ガス抜き孔１０
に挿入されるのを防止することができ、前記ガス抜き孔
１０が塞がれるのを回避することができる。従って、前
記電池において例えば過充電、過放電等によりガスが発
生した際に、破裂を生じるのを防止することができる。When the user accidentally drops the battery and the electrode group is moved toward the sealing plate 6 by this, the tab 14 is moved by the electrode group to the sealing plate 6.
Is moved in the direction toward and comes into contact with the lower ends of the plurality of protrusions 11. As a result, the tabs 14 are
Since it is supported by the gas vent hole 10, the portion of the tab 14 facing the gas vent hole 10 is bent and the gas vent hole 10 is bent.
It is possible to prevent the gas vent hole 10 from being closed and to prevent the gas vent hole 10 from being blocked. Therefore, when gas is generated in the battery due to overcharge, overdischarge, or the like, it is possible to prevent the battery from bursting.
【００１６】本発明に係わる防爆機能付き電池の優れた
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、これを帯状のフェルト状金属繊維多孔体
にその長手方向に沿う一方側の端部のリード溶接箇所を
除いて充填し、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。なお、前記リードタブ１４の前記
リード１５は前記正極１の長手方向に沿う一方側の端部
に溶接されている。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。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. For the positive electrode 1, a paste containing nickel hydroxide powder as an active material, cobalt oxide, and a polymer binder was prepared, and the paste was applied to a belt-like felt-like metal fiber porous body along one side along the longitudinal direction thereof. It was prepared by filling a portion except the lead welded portion at the end of, and drying and rolling with a roller press. The lead 15 of the lead tab 14 is welded to one end of the positive electrode 1 along the longitudinal direction. 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.
【００１７】また、比較例として突起が設けられていな
い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それぞれ５０個について火中に投
入した際の破裂の有無を調べ、その結果を下記表１に示
す。Also, as a comparative example, an AA size nickel cadmium secondary battery similar to that of the example was prepared except that a sealing plate having no protrusion was used. For each of the obtained 50 secondary batteries of Examples and Comparative Examples, the presence or absence of rupture when thrown into fire was examined, and the results are shown in Table 1 below.
【００１８】 表１ 破裂を生じた電池の個数 破裂率（％） 実施例 なし ０ 比較例 ３ ６ 表１から明らかなように、前記電極群と対向すると共に
前記ガス抜き孔の周縁に位置する複数の突起を有する封
口板を備えた実施例の電池は、火中に投入された際の破
裂が皆無であることがわかる。これに対し、突起が設け
られていない封口板を備えた比較例の電池は、火中に投
入された際に破裂を生じることがわかる。Table 1 Number of Batteries that Ruptured Burst Rate (%) Example None 0 Comparative Example 3 6 As is clear from Table 1, a plurality of cells that face the electrode group and are located at the periphery of the gas vent hole. It can be seen that the batteries of the examples provided with the sealing plate having the protrusions of No. 1 did not burst when thrown into fire. On the other hand, it can be seen that the battery of the comparative example including the sealing plate having no protrusion is ruptured when thrown into fire.
【００１９】なお、前記実施例では、円柱形の突起を有
する封口板を用いたが、例えば角柱形、氷柱形の突起を
用いても良い。前記実施例では、突起の数を３個にした
が、前記突起の数は、ガス圧力、あるいは前記電極群に
よって前記帯状リードが前記封口板に向かう方向に移動
された際にこの帯状リードの移動を規制することがで
き、かつ前記帯状リードが前記突起の下端に当接された
状態の時に前記封口板と前記突起及び前記帯状リードで
区画される空間を通過したガスが前記弾性弁体を持ち上
げることが可能であれば何個でも良い。Although the sealing plate having the columnar protrusions is used in the above-mentioned embodiment, for example, prismatic protrusions or icicle protrusions may be used. Although the number of protrusions is three in the above-mentioned embodiment, the number of protrusions depends on gas pressure or when the electrode leads move the belt-shaped leads toward the sealing plate. And the gas passing through the space defined by the sealing plate, the protrusion and the strip-shaped lead lifts the elastic valve body when the strip-shaped lead is in contact with the lower end of the protrusion. Any number is possible as long as it is possible.
【００２０】前記実施例では、封口板のガス抜き孔の周
縁に３個の突起を互いに等間隔を隔て配置したが、前記
突起の配置は、ガス圧力、あるいは前記電極群によって
前記帯状リードが前記封口板に向かう方向に移動された
際にこの帯状リードの移動を規制することが可能であれ
ば、点対称にしなくても良い。In the above embodiment, the three protrusions are arranged at equal intervals on the periphery of the gas vent hole of the sealing plate. However, the arrangement of the protrusions depends on the gas pressure or the electrode group so that the strip-shaped lead is If it is possible to regulate the movement of the band-shaped lead when it is moved in the direction toward the sealing plate, it is not necessary to make it point symmetrical.
【００２１】前記実施例では安全弁として前述した図１
に示す弾性弁体からなり、弁作動後に再び封口板のガス
抜き孔を密閉する復帰式のものを用いたが、安全弁とし
ては前記封口板と前記端子キャップとの間に前記封口板
のガス抜き孔を覆うように介装された弁膜（例えば可撓
性薄膜から形成される）からなる非復帰式のものを用い
ることができる。前記非復帰式の安全弁を備えた電池で
は、前記電池内のガスが前記封口板の前記ガス抜き孔を
通して前記弁膜に圧力を加え、これを破断する。従っ
て、前記ガスは前記弁膜の破断箇所及び前記端子キャッ
プの前記ガス抜き孔から外部に逃散し、前記電池の破裂
が防止される。In the above embodiment, the safety valve shown in FIG.
The elastic valve body shown in Fig. 4 was used, and a resettable type was used in which the gas vent hole of the sealing plate was closed again after the valve was actuated. A non-reset type valve valve (for example, formed of a flexible thin film) interposed so as to cover the hole may be used. In the battery provided with the non-reset type safety valve, the gas in the battery applies a pressure to the valve membrane through the gas vent hole of the sealing plate and breaks it. Therefore, the gas escapes to the outside from the breakage point of the valve membrane and the gas vent hole of the terminal cap, and the bursting of the battery is prevented.
【００２２】前記実施例では、円筒形のニッケルカドミ
ウム二次電池に適用した例を説明したが、角形のニッケ
ルカドミウム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、ニッケルカドミウム二次電池に適
用した例を説明したが、ニッケル水素二次電池、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 example applied to the cylindrical nickel-cadmium secondary battery has been described, but the invention can also be applied to the rectangular nickel-cadmium secondary battery. In the above-mentioned embodiment, the example applied to the nickel-cadmium secondary battery has been described, but the invention can also be applied to the nickel-hydrogen secondary battery, the lithium-ion secondary battery, and the lithium battery.
【００２３】[0023]
【発明の効果】以上詳述したように本発明の防爆機能付
き電池によれば、火中に投入される等により電池内のガ
ス圧力が急激に上昇した際の破裂を防止することができ
ると共に落下により折れ曲がった帯状リードが封口板の
ガス抜き孔に挿入され、この状態においてガスが発生し
た際の破裂を防止することができ、安全性及び信頼性を
向上できるという顕著な効果を奏する。As described above in detail, according to the battery with the explosion-proof function of the present invention, it is possible to prevent the explosion when the gas pressure in the battery suddenly rises due to being thrown into fire. The strip-shaped lead bent by dropping is inserted into the gas vent hole of the sealing plate, and in this state, it is possible to prevent rupture when gas is generated, and it is possible to improve safety and reliability.
【図１】本発明に係わる防爆機能付き電池を示す部分断
面図。FIG. 1 is a partial cross-sectional view showing a battery with an explosion-proof function according to the present invention.
【図２】本発明に係わる防爆機能付き電池に組み込まれ
る封口板とリードタブのタブを示す平面図。FIG. 2 is a plan view showing a sealing plate and a tab of a lead tab incorporated in a battery with an explosion-proof function according to the present invention.
【図３】本発明に係わる防爆機能付き電池に組み込まれ
るリードタブが取付けられた正極を示す斜視図。FIG. 3 is a perspective view showing a positive electrode to which a lead tab incorporated in the battery with explosion-proof function according to the present invention is attached.
【図４】従来の防爆機能付き電池を示す部分断面図。FIG. 4 is a partial sectional view showing a conventional battery having an explosion-proof function.
１…正極、２…負極、３…セパレータ、４…容器、１０
…ガス抜き孔、６…封口板、７…弾性弁体、９…端子キ
ャップ、１２…絶縁ガスケット、１３…リードタブ、１
４…タブ。1 ... Positive electrode, 2 ... Negative electrode, 3 ... Separator, 4 ... Container, 10
... Gas vent hole, 6 ... Sealing plate, 7 ... Elastic valve body, 9 ... Terminal cap, 12 ... Insulation gasket, 13 ... Lead tab, 1
4 ... tab.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 添田 毅 東京都品川区南品川３丁目４番10号 東芝 電池株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Soeda 3-4-10 Minami-Shinagawa, Shinagawa-ku, Tokyo Inside Toshiba Battery Co., Ltd.
Claims (1)
間にセパレータを介装して作製された電極群と、前記容
器の開口部に取付けられたガス抜き孔を有する封口板
と、前記封口板の外側の面に前記ガス抜き孔を囲むよう
に取付けられた端子と、前記封口板と前記端子との間に
前記ガス抜き孔を塞ぐように配置された安全弁と、一端
が前記正極もしくは前記負極に取付けられ、かつ他端が
前記電極群と対向する前記封口板面に取付けられた帯状
のリードとを備えた防爆機能付き電池において、前記封
口板は前記電極群と対向すると共に前記ガス抜き孔の周
縁に位置する複数の突起を有することを特徴とする防爆
機能付き電池。1. An electrode group housed in a container, which is made by interposing a separator between a positive electrode and a negative electrode, and a sealing plate having a gas vent hole attached to an opening of the container, A terminal attached to the outer surface of the sealing plate so as to surround the gas vent hole, a safety valve disposed between the sealing plate and the terminal so as to close the gas vent hole, and one end of which is the positive electrode. Alternatively, in a battery with an explosion-proof function, which is attached to the negative electrode and has a strip-shaped lead attached to the surface of the sealing plate opposite to the electrode group, the sealing plate faces the electrode group and is An explosion-proof battery comprising a plurality of protrusions located at the periphery of a gas vent hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29254994A JP3596918B2 (en) | 1994-11-28 | 1994-11-28 | Explosion-proof battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29254994A JP3596918B2 (en) | 1994-11-28 | 1994-11-28 | Explosion-proof battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08153496A true JPH08153496A (en) | 1996-06-11 |
| JP3596918B2 JP3596918B2 (en) | 2004-12-02 |
Family
ID=17783212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29254994A Expired - Fee Related JP3596918B2 (en) | 1994-11-28 | 1994-11-28 | Explosion-proof battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3596918B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1089363A1 (en) * | 1999-09-28 | 2001-04-04 | SANYO ELECTRIC Co., Ltd. | Sealed rectangular battery and manufacturing method for the same |
| US7704631B2 (en) | 2005-04-22 | 2010-04-27 | Panasonic Corporation | Secondary battery with improved shock resistance |
| US11047508B2 (en) | 2017-03-30 | 2021-06-29 | Donaldson Company, Inc. | Vent with relief valve |
-
1994
- 1994-11-28 JP JP29254994A patent/JP3596918B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1089363A1 (en) * | 1999-09-28 | 2001-04-04 | SANYO ELECTRIC Co., Ltd. | Sealed rectangular battery and manufacturing method for the same |
| US6579640B1 (en) | 1999-09-28 | 2003-06-17 | Sanyo Electric Co., Ltd. | Sealed rectangular battery and manufacturing method for the same |
| US7704631B2 (en) | 2005-04-22 | 2010-04-27 | Panasonic Corporation | Secondary battery with improved shock resistance |
| US11047508B2 (en) | 2017-03-30 | 2021-06-29 | Donaldson Company, Inc. | Vent with relief valve |
| US11692644B2 (en) | 2017-03-30 | 2023-07-04 | Donaldson Company, Inc. | Vent with relief valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3596918B2 (en) | 2004-12-02 |
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