JPH06196140A - Explosion-proof type sealed battery - Google Patents
Explosion-proof type sealed batteryInfo
- Publication number
- JPH06196140A JPH06196140A JP43A JP34674392A JPH06196140A JP H06196140 A JPH06196140 A JP H06196140A JP 43 A JP43 A JP 43A JP 34674392 A JP34674392 A JP 34674392A JP H06196140 A JPH06196140 A JP H06196140A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- battery
- breaking
- connector
- lead wire
- 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
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、防爆型の密閉電池に関
し、電池の内圧が上昇すると電流が遮断される防爆型の
密閉電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof sealed battery, and more particularly to an explosion-proof sealed battery in which current is cut off when the internal pressure of the battery rises.
【０００２】[0002]
【従来の技術】密閉電池は、使用条件によって内圧が異
常に上昇することがある。たとえば、リチウムイオン二
次電池は、過充電すると内圧が異常に上昇する。また、
ショートして過大な電流が流れるときにも内圧が上昇す
る性質がある。内圧が異常に上昇して、電池の外装缶が
破裂すると、電池を収納する電気機器を損傷することが
ある。また、破裂した外装缶から腐食性のガスや電解液
が漏れると、これが電気機器を腐食する弊害もある。こ
の欠点を避けるために、防爆型の密閉電池は、内圧の異
常な上昇を防止するための機構が設けられる。過充電し
た時における内圧の異常な上昇は、電池の内部で電流を
遮断することによって防止できる。電流が遮断される
と、電池の内部で化学反応が起こらなくなるからであ
る。2. Description of the Related Art A sealed battery may have an abnormal increase in internal pressure depending on use conditions. For example, the internal pressure of a lithium ion secondary battery rises abnormally when overcharged. Also,
There is a property that the internal pressure rises even when a short circuit occurs and an excessive current flows. When the internal pressure rises abnormally and the outer can of the battery ruptures, the electrical equipment that houses the battery may be damaged. Further, if a corrosive gas or an electrolyte leaks from the ruptured outer can, this also has a harmful effect of corroding electrical equipment. In order to avoid this drawback, the explosion-proof sealed battery is provided with a mechanism for preventing an abnormal rise in internal pressure. An abnormal rise in internal pressure when overcharged can be prevented by shutting off the current inside the battery. This is because when the electric current is cut off, a chemical reaction does not occur inside the battery.
【０００３】このようなことを実現する防爆型の密閉電
池は、特開平２−１１２１５１号公報と、特開平２−２
８８０６３号公報とに記載されている。これ等の公報に
記載される密閉電池は、図１ないし図３に示す構造の封
口体１を装備している。この封口体１は、リード線４を
接続する弁体２と、リード線４と弁体２との間に設けら
れたストッパ３とを備える。リード線４と弁体２とは、
弁体２が異常な圧力で変形されると分離できる強度で接
続されている。弁体２はキャップ６に電気的に接続され
ており、キャップ６は、弁体２を介してリード線４に接
続されている。ストッパ３は、電池の内圧が異常に上昇
したときに、弁体２をリード線４から強制的に分離する
ために設けられる。いいかえると、ストッパ３は、異常
な圧力で弁体２が変形するとき、リード線４が弁体２と
一緒に移動するのを防止して、弁体２とリード線４との
接続を切り離すものである。したがって、ストッパ３は
貫通孔５を有し、貫通孔５を通過したガスで、弁体２の
内面を押圧して変形させるようにしている。Explosion-proof sealed batteries that realize such a thing are disclosed in JP-A-2-112151 and JP-A-2-2.
No. 88063. The sealed batteries described in these publications are equipped with the sealing body 1 having the structure shown in FIGS. 1 to 3. The sealing body 1 includes a valve body 2 that connects a lead wire 4 and a stopper 3 provided between the lead wire 4 and the valve body 2. The lead wire 4 and the valve body 2 are
The valve bodies 2 are connected with a strength that allows them to separate when deformed by an abnormal pressure. The valve body 2 is electrically connected to the cap 6, and the cap 6 is connected to the lead wire 4 via the valve body 2. The stopper 3 is provided to forcibly separate the valve body 2 from the lead wire 4 when the internal pressure of the battery rises abnormally. In other words, the stopper 3 prevents the lead wire 4 from moving together with the valve body 2 when the valve body 2 is deformed by an abnormal pressure, and disconnects the connection between the valve body 2 and the lead wire 4. Is. Therefore, the stopper 3 has the through hole 5, and the gas passing through the through hole 5 presses the inner surface of the valve body 2 to deform it.
【０００４】この構造の密閉電池は、下記の動作をして
内圧の異常な上昇を防止する。 電池の内圧が異常上昇しない通常の状態 この状態において、弁体２はリード線４に接続される。
それは、電池の内圧で弁体２が変形されないからであ
る。電池のキャップ６は、弁体２とリード線４とを介し
て発電素子７に接続され、通電できる状態となってい
る。 電池の内圧が設定圧力よりも高く上昇した状態 電池の内圧が上昇すると、図２に示すように弁体２が圧
力で押し上げられる。リード線４の上昇は、ストッパ３
で阻止される。したがって、リード線４は定位置にあ
り、弁体２のみが上昇されて、弁体２はリード線４から
切り離される。弁体２がリード線４から切り離される
と、電池内部で電流が遮断される。この状態になると、
電池に電流が流れなくなり、電池内部の化学反応は停止
する。したがって、内圧の上昇は制限される。 電流を遮断してもさらに内圧が上昇する場合 電池の内圧がさらに高くなると、図３に示すように弁体
２の変形量はさらに大きくなって弁体２の一部が破壊さ
れる。破壊された弁体２は電池内のガスを排気する。弁
体２を通過したガスは、キャップ６のガス抜き孔８から
電池の外部に排気される。The sealed battery having this structure performs the following operation to prevent an abnormal increase in internal pressure. Normal state in which the internal pressure of the battery does not rise abnormally In this state, the valve body 2 is connected to the lead wire 4.
This is because the valve body 2 is not deformed by the internal pressure of the battery. The battery cap 6 is connected to the power generation element 7 via the valve body 2 and the lead wire 4 and is in a state capable of conducting electricity. State where internal pressure of battery rises higher than set pressure When internal pressure of battery rises, valve body 2 is pushed up by the pressure as shown in FIG. The rising of the lead wire 4 causes the stopper 3
Is blocked by. Therefore, the lead wire 4 is in a fixed position, only the valve body 2 is lifted, and the valve body 2 is separated from the lead wire 4. When the valve body 2 is separated from the lead wire 4, the current is cut off inside the battery. When this happens,
The electric current stops flowing to the battery, and the chemical reaction inside the battery stops. Therefore, the rise in internal pressure is limited. When the internal pressure rises even when the current is cut off When the internal pressure of the battery further rises, as shown in FIG. 3, the deformation amount of the valve body 2 further increases and a part of the valve body 2 is destroyed. The destroyed valve body 2 exhausts the gas in the battery. The gas that has passed through the valve body 2 is exhausted to the outside of the battery through the gas vent hole 8 of the cap 6.
【０００５】[0005]
【発明が解決しようとする課題】以上の構造を有する防
爆型の密閉電池は、内圧が上昇したときに、弁体２をリ
ード線４から切り離して電流を遮断するので、内圧の異
常な上昇を防止できる。しかしながら、この構造の密閉
電池は、弁体２をリード線４から切り離すときの接続強
度を高精度に制御するのが難しい。それは、弁体２をリ
ード線に溶着する強度で接続強度を調整するからであ
る。接続強度のバラツキは、弁体２の作動圧すなわち、
弁体２がリード線４から切り離される圧力を変動させ
る。リード線の接続強度が弱いと、弁体２からリード線
４は外れ易い。このため、電池の内圧が低いときに電流
が遮断されて電池を再使用できなくなる。反対に接続強
度が強すぎると、電池の内圧が設定圧力に上昇しても弁
体２をリード線４から切り離すことができず、電池の内
圧を著しく上昇させる。このため、弁体２とリード線４
の接続強度は、高い精度で制御することが大切である。
弁体とリード線との接続強度は、リード線を弁体に溶接
する強度で制御している。困ったことに、リード線と弁
体の一部を溶融して接続すると、溶着部分で金属が高温
に加熱されて物性と形状とが変化して、溶着強度にバラ
ツキができる。In the explosion-proof sealed battery having the above structure, when the internal pressure rises, the valve body 2 is disconnected from the lead wire 4 to shut off the electric current, so that the internal pressure rises abnormally. It can be prevented. However, in the sealed battery having this structure, it is difficult to control the connection strength when the valve body 2 is separated from the lead wire 4 with high accuracy. This is because the connection strength is adjusted by the strength of welding the valve body 2 to the lead wire. The variation in connection strength is the operating pressure of the valve body 2, that is,
The pressure at which the valve body 2 is separated from the lead wire 4 is changed. If the connecting strength of the lead wire is weak, the lead wire 4 is easily detached from the valve body 2. Therefore, when the internal pressure of the battery is low, the current is cut off and the battery cannot be reused. On the other hand, if the connection strength is too strong, the valve body 2 cannot be separated from the lead wire 4 even if the internal pressure of the battery rises to the set pressure, and the internal pressure of the battery is significantly increased. Therefore, the valve body 2 and the lead wire 4
It is important to control the connection strength of with high accuracy.
The connection strength between the valve body and the lead wire is controlled by the strength of welding the lead wire to the valve body. Unfortunately, if the lead wire and a part of the valve body are melted and connected, the metal is heated to a high temperature in the welded part, and the physical properties and the shape are changed, and the weld strength varies.
【０００６】本発明者等はこの欠点を解消するために、
図４ないし図６に示す構造の防爆型の密閉電池を開発し
た。この構造の密閉電池は、弁体２とリード線４とを、
中間接続体９を介して電気的に接続している。弁体２
は、電池の開口部を気密に閉塞すると共に、電池内の圧
力上昇に伴い変形する。中間接続体９は、弁体２に電気
的に接続されるが、弁体２が内圧で変形すると切り離さ
れるように接続されている。In order to eliminate this drawback, the present inventors have
An explosion-proof sealed battery having the structure shown in FIGS. 4 to 6 has been developed. In the sealed battery having this structure, the valve body 2 and the lead wire 4 are
It is electrically connected via the intermediate connector 9. Disc 2
Seals the opening of the battery in an airtight manner and deforms as the pressure inside the battery increases. The intermediate connection body 9 is electrically connected to the valve body 2, but is connected so as to be disconnected when the valve body 2 is deformed by the internal pressure.
【０００７】この構造の密閉電池は、内圧が異常に上昇
したときに、弁体２を中間接続体９から切り離して電流
を遮断する。図１ないし図３に示す電池のように、弁体
２をリード線４から切り離すものではない。弁体２は、
中間接続体９を介してリード線４に接続されるので、内
圧が上昇すると、弁体２はリード線ではなくて中間接続
体９から切り離される。中間接続体９は弁体２とリード
線４とを電気的に接続するので、弁体２と中間接続体９
との接続が切り離されると、弁体２とリード線４との接
続も切り離されて電流が遮断される。In the sealed battery of this structure, when the internal pressure rises abnormally, the valve body 2 is separated from the intermediate connection body 9 to cut off the electric current. Unlike the battery shown in FIGS. 1 to 3, the valve body 2 is not separated from the lead wire 4. The valve body 2 is
Since the valve body 2 is connected to the lead wire 4 via the intermediate connecting body 9, the valve body 2 is separated from the intermediate connecting body 9 instead of the lead wire when the internal pressure rises. Since the intermediate connection body 9 electrically connects the valve body 2 and the lead wire 4, the valve body 2 and the intermediate connection body 9 are connected.
When the connection with is disconnected, the connection between the valve body 2 and the lead wire 4 is also disconnected and the current is cut off.
【０００８】この構造の密閉電池は、下記の作動で内圧
の上昇を防止する。 電池の内圧が異常上昇しない通常の状態 この状態においては、弁体２は中間接続体９に接続され
る。弁体２は中間接続体９とリード線４とを介して発電
素子７に接続されて通電状態となる。 電池の内圧が設定圧力よりも高く上昇した状態 電池の内圧が上昇すると、図５に示すように弁体２は圧
力で押し上げられる。押し上げられた弁体２は、中間接
続体９の上面から離される。したがって、弁体２とリー
ド線４とが切り離され、電流は遮断される。The sealed battery having this structure prevents the internal pressure from rising by the following operation. Normal state in which the internal pressure of the battery does not rise abnormally In this state, the valve element 2 is connected to the intermediate connector 9. The valve body 2 is connected to the power generating element 7 via the intermediate connecting body 9 and the lead wire 4 and becomes in the energized state. State where internal pressure of battery rises higher than set pressure When internal pressure of battery rises, valve body 2 is pushed up by pressure as shown in FIG. The pushed valve body 2 is separated from the upper surface of the intermediate connector 9. Therefore, the valve body 2 and the lead wire 4 are separated and the current is cut off.
【０００９】この構造の密閉電池は、封口体を製造する
工程で弁体を中間接続体に接続できる。図１ないし図３
に示す密閉電池は、封口体の製造工程で、弁体をリード
線に溶着することはできず、封口体を外装缶にセットし
た状態で、特定の接着強度で弁体をリード線に溶着する
必要がある。このため、封口体を外装缶にセットする前
に、弁体をリード線に溶着して強度のテストができな
い。図４ないし図５に示す改良した密閉電池は、封口体
を製造するときに、弁体と中間接続体との溶着強度を調
整できるので、図１ないし図３に示す密閉電池に比較す
ると、弁体を中間接続体に高精度に溶着できる。また、
封口体を外装缶に連結する前、すなわち、封口体を組み
立てた状態で弁体が中間接続体から離れる強度をテスト
できる特長もある。このため、図４に示す改良タイプの
密閉電池は、図１に示す電池に比較して、電流の遮断圧
力を均一にできる。しかしながら、この構造の電池も、
溶着部分を破断して電流を遮断するので、電流遮断圧力
を高精度に制御するためには溶着強度を高い精度で制御
する必要がある。このため、簡単な装置で弁体を中間接
続体に溶接して、電池の電流遮断圧力を一定にするのは
難しい。In the sealed battery having this structure, the valve body can be connected to the intermediate connection body in the process of manufacturing the sealing body. 1 to 3
In the sealed battery shown in (1), the valve body cannot be welded to the lead wire in the process of manufacturing the sealing body, and the valve body is welded to the lead wire with a specific adhesive strength when the sealing body is set in the outer can. There is a need. Therefore, the strength of the valve body cannot be tested by welding the valve body to the lead wire before setting the sealing body in the outer can. Since the improved sealed battery shown in FIGS. 4 to 5 can adjust the welding strength between the valve body and the intermediate connecting body when manufacturing the sealing body, the sealed battery shown in FIGS. The body can be welded to the intermediate connector with high accuracy. Also,
There is also a feature that the strength with which the valve body separates from the intermediate connector can be tested before the sealing body is connected to the outer can, that is, in the state where the sealing body is assembled. Therefore, the improved sealed battery shown in FIG. 4 can make the current breaking pressure more uniform than the battery shown in FIG. However, the battery of this structure also
Since the welded portion is broken to interrupt the electric current, it is necessary to control the welding strength with high accuracy in order to control the current interruption pressure with high accuracy. For this reason, it is difficult to weld the valve body to the intermediate connection body with a simple device to make the current cutoff pressure of the battery constant.
【００１０】本発明は、更に高い精度で電流を遮断する
密閉電池を目的として開発されたもので、本発明の重要
な目的は、溶着強度に影響なく電流を高精度に遮断でき
る防爆型の密閉電池を提供することにある。The present invention has been developed for the purpose of a sealed battery that cuts off current with higher accuracy. An important object of the present invention is to provide an explosion-proof sealed battery that can cut off current with high accuracy without affecting welding strength. To provide batteries.
【００１１】[0011]
【課題を解決するための手段】本発明の密閉電池は、前
述の目的を達成するために下記の構成を備える。すなわ
ち、本発明の防爆型の密閉電池は、電池の開口部を気密
に閉塞し、かつ、電池内の圧力上昇に伴い変形する可と
う性を有する導電性の弁体２と、この弁体２を直接ある
いは間接的に発電素子に接続する破断接続子１５とを有
する。破断接続子１５は、一端を弁体側に、他端を発電
素子側に連結している。さらに破断接続子１５の一部に
は、所定の力が作用すると破断する破断部１５Ａを設け
ている。電池の内圧が上昇して弁体２が変形すると、破
断接続子１５の破断部１５Ａが破断される。破断部１５
Ａが破断した破断接続子１５は、弁体２と発電素子との
電気的な接続を遮断して電流を遮断する。The sealed battery of the present invention has the following constitution in order to achieve the above-mentioned object. That is, the explosion-proof sealed battery of the present invention hermetically closes the opening of the battery, and has a flexible electrically conductive valve body 2 that is deformed as the pressure inside the battery rises, and this valve body 2 And a breaking connector 15 for directly or indirectly connecting to the power generation element. The breaking connector 15 has one end connected to the valve body side and the other end connected to the power generating element side. Further, a part of the breaking connector 15 is provided with a breaking portion 15A that breaks when a predetermined force acts. When the internal pressure of the battery rises and the valve body 2 is deformed, the breaking portion 15A of the breaking connector 15 is broken. Fracture part 15
The breakage connector 15 in which A is broken cuts off the electrical connection between the valve body 2 and the power generating element to cut off the current.
【００１２】破断接続子１５の一端は、直接にリード線
４に接続することもできるが、好ましくは、図６に示す
ように、中間接続体９を介してリード線４に接続する。
中間接続体９は、導電性のある金属等の板材で、弁体２
が変形しても変形しないように固定される。このよう
に、中間接続体９を介して破断接続子１５をリード線４
に接続する密閉電池は、リード線４と破断接続子１５と
を、中間接続体９に別々に溶着できる特徴がある。た
だ、破断接続子１５を直接にリード線に接続することも
できる。図９は、中間接続体９の下面で、破断接続子１
５をリード線４に直接に接続している。この構造は、中
間接続体９を導電性の金属板とする必要がない。中間接
続体９は、弁体４と一緒に移動しないように、封口体に
固定される。さらに、中間接続体を使用することなく、
破断接続子をリード線に直接に接続することもできる。
この場合、リード線には、厚く、あるいは太くて弁体と
一緒に変形しない金属を使用する。Although one end of the breaking connector 15 can be directly connected to the lead wire 4, it is preferably connected to the lead wire 4 via an intermediate connector 9 as shown in FIG.
The intermediate connecting body 9 is a plate material such as a conductive metal, and is a valve body 2
It is fixed so that it will not deform even if it deforms. In this way, the breaking connector 15 is connected to the lead wire 4 via the intermediate connector 9.
The sealed battery to be connected to is characterized in that the lead wire 4 and the breaking connector 15 can be separately welded to the intermediate connector 9. However, the breaking connector 15 can be directly connected to the lead wire. FIG. 9 is a bottom view of the intermediate connector 9 showing a broken connector 1
5 is directly connected to the lead wire 4. In this structure, the intermediate connector 9 does not need to be a conductive metal plate. The intermediate connecting body 9 is fixed to the sealing body so as not to move together with the valve body 4. Furthermore, without the use of intermediate connectors,
It is also possible to connect the break connector directly to the lead wire.
In this case, the lead wire is made of metal that is thick or thick and does not deform together with the valve body.
【００１３】[0013]
【作用】本発明の防爆型の密閉電池は、従来の電池のよ
うに、内圧が異常に上昇したときに弁体の溶着部分を切
り離して電流を遮断するものではない。電池の内圧が上
昇したときには、あらかじめ一定の力が作用すると破断
するように設計した破断接続子の破断部を破断させる。The sealed battery of the explosion-proof type according to the present invention does not cut off the electric current by separating the welded portion of the valve body when the internal pressure rises abnormally, unlike the conventional battery. When the internal pressure of the battery rises, the breaking portion of the breaking connector designed to break in advance when a constant force acts is broken.
【００１４】本発明の好ましい実施例を示す図６ないし
図８の密閉電池は、下記の状態で電流を遮断する。 電池の内圧が異常上昇しない通常の状態 この状態においては、弁体２は、破断接続子１５を介し
てリード線に接続される。したがって、電池のキャップ
６は、弁体２と破断接続子１５と中間接続体９とリード
線４とを介して発電素子７に接続されて通電状態とな
る。 電池の内圧が設定圧力よりも高く上昇した状態 電池の内圧が上昇すると、図７に示すように弁体２が圧
力で押し上げられる。押し上げられた弁体２は、破断接
続子１５を引っ張って一部に設けられた破断部１５Ａを
破断する。破断部１５Ａが切断された破断接続子１５
は、弁体２をリード線４から切り離して電流を遮断す
る。 電流を遮断してもさらに内圧が上昇する場合 電池の内圧がさらに高くなると、図８に示すように弁体
２の変形量はさらに大きくなる。著しく変形した弁体２
は可撓性薄板が凸起で破壊される。破壊した弁体２は電
池内のガスを排気する。弁体２を通過したガスは、キャ
ップ６のガス抜き孔８から電池の外部に排気される。こ
のように、電流を遮断した後、さらに圧力が上昇すると
弁体２を破壊する密閉電池は、より確実に外装缶の破裂
を防止できる特長がある。ただ、本発明の密閉電池は、
必ずしも弁体２を破壊する必要はない。The sealed battery of FIGS. 6-8, which illustrates a preferred embodiment of the present invention, interrupts current in the following conditions. Normal state in which the internal pressure of the battery does not rise abnormally In this state, the valve body 2 is connected to the lead wire via the breaking connector 15. Therefore, the battery cap 6 is connected to the power generating element 7 via the valve body 2, the breakage connector 15, the intermediate connector 9 and the lead wire 4, and becomes in the energized state. State where internal pressure of battery rises higher than set pressure When internal pressure of battery rises, valve body 2 is pushed up by the pressure as shown in FIG. 7. The valve body 2 that has been pushed up pulls the breaking connector 15 to break the breaking portion 15A that is partially provided. Broken connector 15 in which the broken portion 15A is cut
Disconnects the valve body 2 from the lead wire 4 to cut off the current. When the internal pressure rises even when the current is cut off When the internal pressure of the battery becomes higher, the amount of deformation of the valve body 2 becomes further larger as shown in FIG. Significantly deformed valve body 2
Is broken by the protrusion of the flexible thin plate. The destroyed valve body 2 exhausts the gas in the battery. The gas that has passed through the valve body 2 is exhausted to the outside of the battery through the gas vent hole 8 of the cap 6. In this way, the sealed battery, which destroys the valve body 2 when the pressure further rises after the current is cut off, has a feature that the outer can can be more reliably prevented from bursting. However, the sealed battery of the present invention,
It is not always necessary to destroy the valve body 2.
【００１５】[0015]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。ただし、以下に示す実施例は、本発明の技術思想
を具体化するための密閉電池を例示するものであって、
本発明の密閉電池は、構成部品の種類、材質、形状、構
造、配置を下記のものに特定するものでない。本発明の
密閉電池は、特許請求の範囲において、種々の変更を加
えることができる。Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below exemplify a sealed battery for embodying the technical idea of the present invention,
The sealed battery of the present invention does not specify the types, materials, shapes, structures and arrangements of the constituent parts as follows. The sealed battery of the present invention can be modified in various ways within the scope of the claims.
【００１６】さらに、この明細書は、特許請求の範囲を
理解し易いように、実施例に示される部材に対応する番
号を、「特許請求の範囲の欄」、「作用の欄」、および
「課題を解決するための手段の欄」に示される部材に付
記している。ただ、特許請求の範囲に示される部材を、
実施例の部材に特定するものでは決してない。Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claim column", "action column", and "action column". It is added to the members shown in the section of "Means for Solving the Problems". However, the members shown in the claims are
It is by no means specific to the members of the examples.
【００１７】図６ないし図８に示す防爆型の密閉電池
は、外装缶１０と、外装缶１０に収納された＋−の電極
板からなる発電素子７と、外装缶１０の開口部を閉塞す
る封口体１とを備える。外装缶１０は底を閉塞した円筒
状で、上端の開口部に封口体１をかしめて固定してい
る。The explosion-proof sealed battery shown in FIG. 6 to FIG. 8 closes the outer can 10, the power generating element 7 made of + and − electrode plates housed in the outer can 10, and the opening of the outer can 10. And a sealing body 1. The outer can 10 has a cylindrical shape with a closed bottom, and the sealing body 1 is caulked and fixed to the opening at the upper end.
【００１８】封口体１は、絶縁パッキン１１を介して、
外装缶１０にかしめて固定されて、外装缶１０を気密に
閉塞している。封口体１は、電池の内圧が上昇すると、
電流を遮断する。電流を遮断した後、さらに内圧が上昇
すると、内部のガスを排気する。The sealing body 1 has an insulating packing 11 interposed therebetween.
The outer can 10 is caulked and fixed to the outer can 10 to hermetically close the outer can 10. When the internal pressure of the battery rises, the sealing body 1
Cut off the current. When the internal pressure further rises after the electric current is cut off, the gas inside is exhausted.
【００１９】このことを実現するために、封口体１は、
キャップ６と、弁体２と、破断接続子１５と、中間接続
体９とを備える。キャップ６と弁体２と中間接続体９に
は導電性が要求されるので、金属板をプレス成形して製
造されている。この構造の封口体１は、キャップ６を＋
電極としている。キャップ６は、弁体２と破断接続子１
５と中間接続体９とリード線４とを介して発電素子７で
ある＋電極板に接続される。キャップ６と弁体２と中間
接続体９とは円盤状に切断されている。金属板である中
間接続体９の周縁は、上方に折曲されて、弁体２とキャ
ップ６とを挟着する状態にかしめられて３枚の金属板を
連結している。キャップ６と弁体２とは直接に接触する
が、弁体２と中間接続体９との間には絶縁パッキン１２
を挟着している。In order to realize this, the sealing body 1 is
The cap 6, the valve body 2, the breaking connector 15, and the intermediate connector 9 are provided. Since the cap 6, the valve body 2, and the intermediate connecting body 9 are required to have conductivity, they are manufactured by pressing a metal plate. The sealing body 1 of this structure has the cap 6 +
It is used as an electrode. The cap 6 includes a valve body 2 and a breaking connector 1.
5, the intermediate connector 9, and the lead wire 4 are connected to the + electrode plate which is the power generating element 7. The cap 6, the valve body 2, and the intermediate connector 9 are cut into a disc shape. The peripheral edge of the intermediate connecting body 9, which is a metal plate, is bent upward and is caulked to sandwich the valve body 2 and the cap 6 to connect the three metal plates. Although the cap 6 and the valve body 2 are in direct contact with each other, the insulating packing 12 is provided between the valve body 2 and the intermediate connector 9.
Are sandwiched between.
【００２０】キャップ６は、中央凸にプレス加工され
て、ガス抜き孔８を開口している。弁体２は中心部分
に、破断接続子１５の上端をスポット溶接、あるいは超
音波溶接して接続している。弁体２は、電池の内圧が設
定圧になると、図７に示すように変形して、破断接続子
１５の破断部１５Ａを破断する。The cap 6 is press-worked to have a convex shape at the center, and a gas vent hole 8 is opened. The valve body 2 is connected to the central portion by spot welding or ultrasonic welding of the upper end of the breaking connector 15. When the internal pressure of the battery reaches the set pressure, the valve body 2 is deformed as shown in FIG. 7 and breaks the breaking portion 15A of the breaking connector 15.
【００２１】破断接続子１５は、上下の端部を折曲し、
折曲した上端を弁体２に、下端を中間接続体９に溶着し
ている。破断接続子１５は、中間の一部に破断部１５Ａ
を設けている。破断部１５Ａは、変形する弁体２に破断
接続子１５が引っ張られたときに破断するように設計さ
れている部分である。したがって、破断部１５Ａは、破
断接続子１５が引っ張られたときに破断しやすいよう
に、両面に溝を設けて部分的に薄く加工している。た
だ、本発明の密閉電池は、破断接続子に設ける破断部の
構造を、図６に示す形状に特定しない。破断部は、破断
接続子が引っ張られたときに、あらかじめ設計された張
力で破断するようにした全ての構造とすることができ
る。たとえば図示しないが、破断部は、両側に切欠を設
けて幅を狭くした形状、あるいは、破断接続子の一部に
薄い金属板を接続して切れ易くした構造とすることもで
きる。The breaking connector 15 has its upper and lower ends bent,
The bent upper end is welded to the valve body 2 and the lower end is welded to the intermediate connector 9. The breaking connector 15 has a breaking portion 15A at a part of the middle.
Is provided. The breaking portion 15A is a portion designed to break when the breaking connector 15 is pulled by the deformable valve body 2. Therefore, the breakage portion 15A is provided with grooves on both sides and is partially thinned so that the breakage connector 15 is easily broken when pulled. However, in the sealed battery of the present invention, the structure of the breakage portion provided in the breakage connector is not limited to the shape shown in FIG. The break can be any structure that breaks under pre-designed tension when the break connector is pulled. For example, although not shown, the breaking portion may have a shape in which notches are provided on both sides to reduce the width, or a structure in which a thin metal plate is connected to a part of the breaking connector to facilitate breaking.
【００２２】破断部１５Ａの破断強度は、この部分の厚
さと、幅と、破断接続子の材質とで調整できる。破断部
は、薄くし、あるいは、幅を狭くし、あるいはまた、切
れ易い材質とすることによって、破断強度を低く設計で
きる。反対に厚く、幅を広く切れにくい材質を選択し
て、破断強度を強くできる。破断部の破断強度を低くす
ると、電流を遮断する電池の内圧を低くでき、反対に、
破断強度を高く設計すると、電流を遮断する電池内圧は
高くなる。The breaking strength of the breaking portion 15A can be adjusted by the thickness and width of this portion and the material of the breaking connector. The breaking portion can be designed to have a low breaking strength by thinning it, narrowing its width, or using a material that is easy to cut. On the contrary, you can increase the breaking strength by selecting a material that is thick, wide and hard to cut. If the breaking strength of the breaking part is lowered, the internal pressure of the battery that cuts off the current can be lowered, and conversely,
If the rupture strength is designed to be high, the internal pressure of the battery that interrupts the current becomes high.
【００２３】破断接続子１５は、破断部１５Ａを破断し
て電流を遮断する。破断接続子１５の両端は、電池の内
圧が上昇しても破断しない。したがって、破断接続子１
５は、弁体と中間接続体とに確実に溶着する折曲部を設
けている。折曲部は、弁体２と中間接続体９の下面に面
接触状態で確実に溶着される。The breaking connector 15 breaks the breaking portion 15A to interrupt the current. Both ends of the breaking connector 15 do not break even if the internal pressure of the battery rises. Therefore, the breaking connector 1
5 is provided with a bent portion that is surely welded to the valve body and the intermediate connection body. The bent portion is reliably welded to the lower surfaces of the valve body 2 and the intermediate connecting body 9 in a surface contact state.
【００２４】さらに、弁体２は、これを貫通してガス孔
１８が開口されると共に、電流を遮断した後、さらに内
圧が上昇すると、破壊する可撓性薄板２Ａを積層してい
る。可撓性薄板２Ａは、弁体２の上面を気密に閉塞して
いる。すなわち、可撓性薄板２Ａは、弁体２に開口され
たガス孔１３を気密に閉塞している。可撓性薄板２Ａが
破断されると、電池内のガスは弁体２のガス孔１３を通
過して、電池の外装缶の外部に排気される。可撓性薄板
２Ａは、圧力が設定値以上になると、破断される強度に
設計されている。さらに、可撓性薄板２Ａは、温度が上
昇すると破断強度が低下するように設計される。過充電
して電池温度が上昇すると、確実に破断させるためであ
る。Further, the valve body 2 has a gas hole 18 opened therethrough, and a flexible thin plate 2A which is destroyed when the internal pressure further rises after the current is cut off is laminated. The flexible thin plate 2A hermetically closes the upper surface of the valve body 2. That is, the flexible thin plate 2A hermetically closes the gas hole 13 opened in the valve body 2. When the flexible thin plate 2A is broken, the gas in the battery passes through the gas holes 13 of the valve body 2 and is exhausted to the outside of the outer can of the battery. The flexible thin plate 2A is designed to have a strength to be broken when the pressure exceeds a set value. Further, the flexible thin plate 2A is designed so that the breaking strength thereof decreases as the temperature rises. This is because when the battery temperature rises due to overcharging, the battery is surely broken.
【００２５】この特性の可撓性薄板２Ａには、金属薄膜
２ａにプラスチック膜２ｂを積層した積層板を使用す
る。金属薄膜２ａには、チタン、ステンレス、アルミニ
ウム等の耐腐食性の金属薄膜２ａが使用できる。これ等
の金属薄膜２ａではアルミニウムが最適である。それ
は、安価で薄膜にするのが簡単で、最適な強度にできる
からである。金属薄膜２ａにアルミニウムを使用する場
合、金属薄膜２ａの膜厚は通常１０μｍ〜３００μｍ好
ましくは１５μｍ〜５０μｍの範囲に設計される。プラ
スチック膜２ｂには、ポリエチレン、ポリプロピレン等
の熱可塑性合成樹脂を使用できる。プラスチック膜２ｂ
の膜圧は、通常１０μｍ〜５００μｍ、好ましくは２０
μｍ〜１００μｍの範囲に設計される。この構造の可撓
性薄板２Ａは金属薄膜２ａの表面にプラスチックをコー
ティングして製造できる。また、金属薄膜２ａとプラス
チック膜２ｂとを接着剤で接着して製造することもでき
る。最も簡単な可撓性薄板２Ａは、金属薄膜２ａの片面
にプラスチック膜２ｂを積層した２層の積層板である。
ただ、金属薄膜の両面にプラスチック膜を積層したもの
あるいは、プラスチック膜の両面に金属薄膜を積層した
もの、あるいは、複数の金属薄膜およびプラスチック膜
を積層した積層板も使用できる。As the flexible thin plate 2A having this characteristic, a laminated plate in which a plastic film 2b is laminated on a metal thin film 2a is used. As the metal thin film 2a, a corrosion-resistant metal thin film 2a such as titanium, stainless steel, or aluminum can be used. Aluminum is most suitable for these metal thin films 2a. This is because it is inexpensive, easy to make into a thin film, and has an optimum strength. When aluminum is used for the metal thin film 2a, the thickness of the metal thin film 2a is usually designed to be in the range of 10 μm to 300 μm, preferably 15 μm to 50 μm. For the plastic film 2b, a thermoplastic synthetic resin such as polyethylene or polypropylene can be used. Plastic membrane 2b
The membrane pressure is usually 10 μm to 500 μm, preferably 20 μm.
It is designed in the range of μm to 100 μm. The flexible thin plate 2A having this structure can be manufactured by coating the surface of the metal thin film 2a with plastic. Alternatively, the metal thin film 2a and the plastic film 2b can be manufactured by adhering them with an adhesive. The simplest flexible thin plate 2A is a two-layer laminated plate in which a plastic film 2b is laminated on one surface of a metal thin film 2a.
However, a plastic film laminated on both sides of a metal thin film, a metal thin film laminated on both sides of a plastic film, or a laminated plate in which a plurality of metal thin films and plastic films are laminated can also be used.
【００２６】図６に示す可撓性薄板２Ａは、弁体２と同
じ外形として、弁体２とキャップ６とで挟着している。
挟着された可撓性薄板２Ａは、これを貫通してキャップ
６と弁体２とをスポット溶接して電気的に接続してい
る。可撓性薄板２Ａは、図８に示すように、キャップ６
の下面に設けた凸起１６で突いて破断する場合と、電池
の内圧で伸長して破断する場合とがある。The flexible thin plate 2A shown in FIG. 6 has the same outer shape as the valve body 2 and is sandwiched between the valve body 2 and the cap 6.
The sandwiched flexible thin plate 2A penetrates through this and spot-welds the cap 6 and the valve body 2 to electrically connect them. The flexible thin plate 2A, as shown in FIG.
In some cases, the protrusions 16 may be ruptured by the protrusions 16 provided on the lower surface of the battery, and in some cases, the internal pressure of the battery may cause expansion and breakage.
【００２７】破断接続子１５とリード線とを溶着する中
間接続体９は、これを貫通してガス透過孔１４を開口し
ている。ガス透過孔１４は、ガスを中間接続体９に貫通
させて、電池の内圧で弁体２を変形させる。中間接続体
９の下面にはリード線４を接続する。リード線４は、中
間接続体９を発電素子７に接続する。すなわち、図６に
示す封口体１は、キャップ６を、弁体２と、破断接続子
１５と、中間接続体９と、リード線４とを介して発電素
子７に接続している。The intermediate connector 9, which welds the break connector 15 and the lead wire, has a gas permeable hole 14 formed therethrough. The gas permeation hole 14 allows gas to penetrate through the intermediate connector 9 and deforms the valve body 2 by the internal pressure of the battery. The lead wire 4 is connected to the lower surface of the intermediate connector 9. The lead wire 4 connects the intermediate connector 9 to the power generation element 7. That is, in the sealing body 1 shown in FIG. 6, the cap 6 is connected to the power generating element 7 via the valve body 2, the breaking connector 15, the intermediate connector 9, and the lead wire 4.
【００２８】さらに、図６ないし図８に示す密閉電池
は、弁体とキャップとの間に弁体の変形を調整する弾性
リング１７を配設している。弾性リング１７は、弁体２
の上面を弾性的に押圧して、弁体２を中間接続体９に押
圧している。弾性リング１７の内径を小さくして、弁体
２の押圧力を強くすると、弁体２が変形し難く、破断接
続子１５が破断し難くなって、電流を遮断する設定圧が
高くなる。弾性リング１７には、弾性変形する円筒やコ
イルスプリングを使用できる。Further, in the sealed battery shown in FIGS. 6 to 8, the elastic ring 17 for adjusting the deformation of the valve body is arranged between the valve body and the cap. The elastic ring 17 is the valve body 2.
Of the valve body 2 is elastically pressed to press the valve body 2 against the intermediate connector 9. When the inner diameter of the elastic ring 17 is reduced and the pressing force of the valve body 2 is increased, the valve body 2 is less likely to be deformed, the breakage connector 15 is less likely to be broken, and the set pressure for interrupting the current is increased. For the elastic ring 17, a cylinder or a coil spring that elastically deforms can be used.
【００２９】キャップ６と弁体２と破断接続子１５と中
間接続体９とを有する封口体１は、図１０ないし図１４
に示すように、下記の工程で組立できる。 図１０に示すように、上面に可撓性薄板２Ａを積層
し、図１１に示すように可撓性薄板２Ａを弁体に溶着す
る。 図１２に示すように、破断接続子１５の上端を溶着
する。 図１３に示すように、周縁を上方に折曲した中間接
続体９に、リング状の絶縁パッキン１２を嵌入し、絶縁
パッキン１２の上に円盤状の弁体２とキャップを積層す
る。 図１４に示すように、中間接続体９の周縁を折り曲
げ、中間接続体９でもって、絶縁パッキン１２とを介し
て、弁体２とキャップ６の周縁をかしめて固定する。そ
して、破断接続子１５の下端を折曲して、中間接続体の
下面に溶着する。破断接続子１５の下端は折曲部分の内
側にＶ溝を設けて、折曲位置を正確にしている。A sealing body 1 having a cap 6, a valve body 2, a breaking connector 15 and an intermediate connector 9 is shown in FIGS.
As shown in, it can be assembled by the following steps. As shown in FIG. 10, the flexible thin plate 2A is laminated on the upper surface, and the flexible thin plate 2A is welded to the valve body as shown in FIG. As shown in FIG. 12, the upper end of the breaking connector 15 is welded. As shown in FIG. 13, the ring-shaped insulating packing 12 is fitted into the intermediate connecting body 9 whose peripheral edge is bent upward, and the disc-shaped valve body 2 and the cap are laminated on the insulating packing 12. As shown in FIG. 14, the peripheral edge of the intermediate connector 9 is bent, and the intermediate connector 9 is used to caulk and fix the peripheral edges of the valve element 2 and the cap 6 via the insulating packing 12. Then, the lower end of the breaking connector 15 is bent and welded to the lower surface of the intermediate connector. The lower end of the breaking connector 15 is provided with a V groove inside the bent portion so that the bent position is accurate.
【００３０】さらに、弁体２とキャップ６との間に弾性
リング１７を介在する封口体１は、中間接続体９の上面
に、順番に、絶縁パッキン１２、弁体２、弾性リング１
７、キャップ６を積層し、中間接続体９の周縁を折り曲
げて、絶縁パッキン１２を介して、弁体２とキャップ６
の周縁をかしめて固定する。Further, the sealing body 1 in which the elastic ring 17 is interposed between the valve body 2 and the cap 6 is provided on the upper surface of the intermediate connecting body 9 in this order by the insulating packing 12, the valve body 2, and the elastic ring 1.
7 and the cap 6 are laminated, the peripheral edge of the intermediate connecting body 9 is bent, and the valve body 2 and the cap 6 are inserted through the insulating packing 12.
Crim the periphery of and fix it.
【００３１】[0031]
【発明の効果】本発明の防爆型の密閉電池は、独得の構
造で異常時に電流を遮断する。すなわち、従来の密閉電
池は、内圧が上昇して弁体が変形すると、溶着部分を破
断して電流を遮断していた。本発明の密閉電池は、異常
時に弁体の溶着部分を破断して電流を遮断する構造では
ない。あらかじめ破断するように設計した破断接続子の
破断部を破断して、電流を遮断する。このため、本発明
の密閉電池は、破断接続子の両端を、溶着強度を調整す
ることなく弁体や、リード線や、中間接続体等に溶接で
きる。このことは、溶着工程を簡素化できると共に、能
率よく多量生産できる。EFFECTS OF THE INVENTION The explosion-proof sealed battery of the present invention has a unique structure and shuts off the current when an abnormality occurs. That is, in the conventional sealed battery, when the internal pressure rises and the valve body is deformed, the welded portion is broken to interrupt the current. The sealed battery of the present invention does not have a structure that breaks the welded portion of the valve element to interrupt the current when an abnormality occurs. Break the break of the break connector designed to break in advance to interrupt the current. Therefore, in the sealed battery of the present invention, both ends of the breakage connector can be welded to the valve body, the lead wire, the intermediate connection body or the like without adjusting the welding strength. This simplifies the welding process and enables efficient mass production.
【００３２】さらに、本発明の密閉電池は、破断接続子
の一部に設けた破断部の破断強度を簡単かつ容易に、し
かも極めて高精度に制御できる。それは、破断接続子の
一部に切欠を設け、あるいは、特定の厚さに加工し、あ
るいはまた特定の幅に設計することよよって破断部の破
断強度を高精度に制御できるからである。一定の張力で
破断する破断接続子は、電流を遮断する電池の内圧をバ
ラツキなく均一にすることができる。Further, in the sealed battery of the present invention, the breaking strength of the breaking portion provided in a part of the breaking connector can be controlled easily and easily with extremely high precision. This is because the breaking strength of the breaking portion can be controlled with high accuracy by providing a notch in a part of the breaking connector, processing it to a specified thickness, or designing it to a specified width. The breakage connector that breaks at a constant tension can make the internal pressure of the battery that interrupts the current uniform without variation.
【００３３】本発明者等は、実際に本発明の密閉電池を
試作して、電流を遮断する電池内圧力と、落下振動試験
をして不良品の発生する状態をテストした。その結果
を、表１に示している。この表は、本発明の密閉電池が
極めて高い精度で電流を遮断でき、しかも、落下試験で
不良品が発生しないことを明示する。ただし、この表は
下記の条件で測定した。The inventors of the present invention actually made a prototype of the sealed battery of the present invention, and tested the internal pressure of the battery for cutting off the current and the drop vibration test to test the state of defective products. The results are shown in Table 1. This table clearly shows that the sealed battery of the present invention can cut off the current with extremely high accuracy and does not cause a defective product in the drop test. However, this table was measured under the following conditions.
【００３４】[0034]
【表１】 [Table 1]
【００３５】 本発明の密閉電池は、図６に示すよう
に、破断接続子を中間接続体に溶接した構造とした。 従来の密閉電池は、図１に示すように、弁体をリー
ド線に溶着した構造とした。 落下振動試験は、１メートルの高さから１０回落下
させて、弁体とリード線との外れを測定した。As shown in FIG. 6, the sealed battery of the present invention has a structure in which the breaking connector is welded to the intermediate connector. A conventional sealed battery has a structure in which a valve element is welded to a lead wire as shown in FIG. In the drop vibration test, the valve body was dropped 10 times from a height of 1 meter, and the disconnection between the valve body and the lead wire was measured.
【００３６】この表に示すように、本発明の防爆型の密
閉電池は、溶接強度に依存しないで破断接続子を破断で
き、電池内圧が上昇したときには、極めて少ない圧力差
で電流を遮断できる。このため、異常時には内圧の異常
な上昇を防止して外装缶の破壊を確実に阻止でき、ま
た、電池が誤動作して不良品となるのを効果的に防止で
きる特長も実現する。As shown in this table, in the explosion-proof sealed battery of the present invention, the breaking connector can be broken without depending on the welding strength, and when the battery internal pressure rises, the current can be cut off with an extremely small pressure difference. Therefore, in the event of an abnormality, the internal pressure can be prevented from abnormally rising to prevent the outer can from being destroyed, and the battery can be effectively prevented from malfunctioning and becoming a defective product.
【図１】従来の防爆型の密閉電池の封口体部分を示す断
面図FIG. 1 is a cross-sectional view showing a sealing body portion of a conventional explosion-proof sealed battery.
【図２】図１に示す密閉電池の封口体部分であって電池
の内圧が設定圧以上に上昇した状態を示す断面図FIG. 2 is a cross-sectional view showing a state where the internal pressure of the battery rises above a set pressure in the sealing body portion of the sealed battery shown in FIG.
【図３】図１に示す密閉電池の封口体部分であって電池
の内圧が第２の設定圧以上に上昇した状態を示す断面図FIG. 3 is a cross-sectional view showing a state where the internal pressure of the battery rises above a second set pressure in the sealing body portion of the sealed battery shown in FIG.
【図４】改良された密閉電池の封口体部分を示す断面図FIG. 4 is a sectional view showing a sealing body portion of the improved sealed battery.
【図５】図４に示す密閉電池の封口体部分であって電池
の内圧が設定圧以上に上昇した状態を示す断面図FIG. 5 is a cross-sectional view showing a sealing body portion of the sealed battery shown in FIG. 4, showing a state where the internal pressure of the battery rises above a set pressure.
【図６】本発明の実施例にかかる密閉電池の封口体部分
を示す断面図FIG. 6 is a sectional view showing a sealing body portion of a sealed battery according to an embodiment of the present invention.
【図７】図６に示す密閉電池の封口体部分であって圧力
が上昇した状態を示す断面図FIG. 7 is a cross-sectional view showing a state in which the pressure has risen in the sealing body portion of the sealed battery shown in FIG.
【図８】図６に示す密閉電池の封口体部分であってさら
に圧力が上昇した状態を示す断面図8 is a cross-sectional view showing a state where the pressure is further increased in the sealing body portion of the sealed battery shown in FIG.
【図９】本発明の実施例にかかる他の構造の密閉電池の
封口体部分の断面図FIG. 9 is a sectional view of a sealing body portion of a sealed battery having another structure according to an embodiment of the present invention.
【図１０】図６に示す封口体の製造工程を示す断面図10 is a cross-sectional view showing a manufacturing process of the sealing body shown in FIG.
【図１１】図６に示す封口体の製造工程を示す断面図11 is a cross-sectional view showing a manufacturing process of the sealing body shown in FIG.
【図１２】図６に示す封口体の製造工程を示す断面図12 is a cross-sectional view showing a manufacturing process of the sealing body shown in FIG.
【図１３】図６に示す封口体の製造工程を示す断面図13 is a sectional view showing a manufacturing process of the sealing body shown in FIG.
【図１４】図６に示す封口体の製造工程を示す断面図14 is a cross-sectional view showing a manufacturing process of the sealing body shown in FIG.
１…封口体 ２…弁体 ２Ａ…可撓性薄板 ２ａ…金属薄膜 ２ｂ…プラスチック膜 ３…ストッパ ４…リード線 ５…貫通孔 ６…キャップ ７…発電素子 ８…ガス抜き孔 ９…中間接続体 １０…外装缶 １１…絶縁パッキン １２…絶縁パッキン １３…切欠 １４…ガス透過孔 １５…破断接続子 １５Ａ…破断部 １６…凸起 １７…弾性リング １８…ガス孔 DESCRIPTION OF SYMBOLS 1 ... Sealing body 2 ... Valve body 2A ... Flexible thin plate 2a ... Metal thin film 2b ... Plastic film 3 ... Stopper 4 ... Lead wire 5 ... Through hole 6 ... Cap 7 ... Power generating element 8 ... Gas vent hole 9 ... Intermediate connection body DESCRIPTION OF SYMBOLS 10 ... Outer can 11 ... Insulating packing 12 ... Insulating packing 13 ... Notch 14 ... Gas permeable hole 15 ... Breaking connector 15A ... Breaking part 16 ... Projection 17 ... Elastic ring 18 ... Gas hole
Claims (1)
つ電池内の圧力上昇に伴い変形する可とう性を有する導
電性の弁体(2)と、この弁体(2)を、直接あるいは間接的
に発電素子に接続する破断接続子(15)とを備え、破断接
続子(15)は一端を弁体側に、他端を発電素子側に連結し
ていると共に、一部には所定の力が作用すると破断する
破断部(15A)が形成されており、電池の内圧が上昇する
と弁体(2)が変形して破断接続子(15)の破断部(15A)が破
断されて、弁体(2)と発電素子との電気的な接続が遮断
されるように構成されてなる防爆型の密閉電池。1. A conductive valve body (2) which is airtightly closed at an opening of a battery and has a flexibility to be deformed in accordance with a pressure increase in the battery, and the valve body (2). A breaking connector (15) that directly or indirectly connects to the power generating element is provided, and the breaking connector (15) has one end connected to the valve body side and the other end connected to the power generating element side, and partly A rupture portion (15A) is formed that breaks when a predetermined force acts, and when the internal pressure of the battery rises, the valve body (2) is deformed and the breakage portion (15A) of the breakage connector (15) is broken. An explosion-proof sealed battery configured so that the electrical connection between the valve body (2) and the power generating element is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34674392A JP3222963B2 (en) | 1992-12-25 | 1992-12-25 | Explosion-proof sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34674392A JP3222963B2 (en) | 1992-12-25 | 1992-12-25 | Explosion-proof sealed battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06196140A true JPH06196140A (en) | 1994-07-15 |
| JP3222963B2 JP3222963B2 (en) | 2001-10-29 |
Family
ID=18385517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34674392A Expired - Fee Related JP3222963B2 (en) | 1992-12-25 | 1992-12-25 | Explosion-proof sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3222963B2 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19630336A1 (en) * | 1995-08-01 | 1997-02-06 | Tdk Corp | Enclosed cell safety device |
| US5821008A (en) * | 1996-02-16 | 1998-10-13 | Fdk Corporation | Battery provided with explosion-proof components |
| JP2010161023A (en) * | 2009-01-09 | 2010-07-22 | Fdk Energy Co Ltd | Cylindrical battery |
| EP2472634A1 (en) * | 2009-09-30 | 2012-07-04 | LG Chem, Ltd. | Double-sealed cap assembly and cylindrical secondary battery comprising same |
| US9620751B2 (en) | 2009-09-30 | 2017-04-11 | Lg Chem, Ltd. | Dual sealing cap assembly and cylindrical secondary battery including the same |
| JPWO2017164000A1 (en) * | 2016-03-25 | 2019-01-31 | 三洋電機株式会社 | Cylindrical battery |
| CN109962203A (en) * | 2017-12-22 | 2019-07-02 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric car |
| CN109962182A (en) * | 2017-12-22 | 2019-07-02 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric car |
| CN109962204A (en) * | 2017-12-22 | 2019-07-02 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric car |
| CN111244339A (en) * | 2018-11-29 | 2020-06-05 | 比亚迪股份有限公司 | Battery cover plate and battery with same |
| US20200343491A1 (en) * | 2017-12-22 | 2020-10-29 | Byd Company Limited | Battery cover plate assembly, cell, battery module, power battery, and electric vehicle |
| CN112448097A (en) * | 2019-09-04 | 2021-03-05 | 东莞新能源科技有限公司 | Explosion-proof valve and battery pack |
| WO2021106728A1 (en) | 2019-11-29 | 2021-06-03 | 三洋電機株式会社 | Sealed battery |
| CN115863869A (en) * | 2021-09-27 | 2023-03-28 | 宁德时代新能源科技股份有限公司 | End cover assembly, battery monomer, battery and consumer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102565772B1 (en) | 2017-03-30 | 2023-08-10 | 도날드슨 컴파니, 인코포레이티드 | Vent with relief valve |
-
1992
- 1992-12-25 JP JP34674392A patent/JP3222963B2/en not_active Expired - Fee Related
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19630336A1 (en) * | 1995-08-01 | 1997-02-06 | Tdk Corp | Enclosed cell safety device |
| DE19630336B4 (en) * | 1995-08-01 | 2004-11-11 | Tdk Corp. | Enclosed cell safety device |
| US5821008A (en) * | 1996-02-16 | 1998-10-13 | Fdk Corporation | Battery provided with explosion-proof components |
| JP2010161023A (en) * | 2009-01-09 | 2010-07-22 | Fdk Energy Co Ltd | Cylindrical battery |
| EP2472634A1 (en) * | 2009-09-30 | 2012-07-04 | LG Chem, Ltd. | Double-sealed cap assembly and cylindrical secondary battery comprising same |
| EP2472634A4 (en) * | 2009-09-30 | 2013-11-06 | Lg Chemical Ltd | Double-sealed cap assembly and cylindrical secondary battery comprising same |
| US9620751B2 (en) | 2009-09-30 | 2017-04-11 | Lg Chem, Ltd. | Dual sealing cap assembly and cylindrical secondary battery including the same |
| JPWO2017164000A1 (en) * | 2016-03-25 | 2019-01-31 | 三洋電機株式会社 | Cylindrical battery |
| US11069916B2 (en) | 2016-03-25 | 2021-07-20 | Sanyo Electric Co., Ltd. | Cylindrical battery |
| US20200343491A1 (en) * | 2017-12-22 | 2020-10-29 | Byd Company Limited | Battery cover plate assembly, cell, battery module, power battery, and electric vehicle |
| CN109962203A (en) * | 2017-12-22 | 2019-07-02 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric car |
| US11728505B2 (en) * | 2017-12-22 | 2023-08-15 | Byd Company Limited | Battery cover plate assembly comprising a current interrupt apparatus |
| CN109962182A (en) * | 2017-12-22 | 2019-07-02 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric car |
| CN109962204B (en) * | 2017-12-22 | 2020-12-25 | 比亚迪股份有限公司 | Battery cover plate assembly, single battery, battery module, power battery and electric automobile |
| CN109962204A (en) * | 2017-12-22 | 2019-07-02 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric car |
| CN111244339B (en) * | 2018-11-29 | 2021-09-21 | 比亚迪股份有限公司 | Battery cover plate and battery with same |
| CN111244339A (en) * | 2018-11-29 | 2020-06-05 | 比亚迪股份有限公司 | Battery cover plate and battery with same |
| CN112448097A (en) * | 2019-09-04 | 2021-03-05 | 东莞新能源科技有限公司 | Explosion-proof valve and battery pack |
| WO2021106728A1 (en) | 2019-11-29 | 2021-06-03 | 三洋電機株式会社 | Sealed battery |
| CN114762182A (en) * | 2019-11-29 | 2022-07-15 | 三洋电机株式会社 | Sealed battery |
| EP4068493A1 (en) | 2019-11-29 | 2022-10-05 | SANYO Electric Co., Ltd. | Sealed battery |
| EP4068493A4 (en) * | 2019-11-29 | 2023-07-19 | SANYO Electric Co., Ltd. | Sealed battery |
| CN115863869A (en) * | 2021-09-27 | 2023-03-28 | 宁德时代新能源科技股份有限公司 | End cover assembly, battery monomer, battery and consumer |
| CN115863869B (en) * | 2021-09-27 | 2024-01-09 | 宁德时代新能源科技股份有限公司 | End cover assembly, battery monomer, battery and electric equipment |
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| JP3222963B2 (en) | 2001-10-29 |
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