JPH06140011A - Explosion-proof sealed battery - Google Patents
Explosion-proof sealed batteryInfo
- Publication number
- JPH06140011A JPH06140011A JP4290491A JP29049192A JPH06140011A JP H06140011 A JPH06140011 A JP H06140011A JP 4290491 A JP4290491 A JP 4290491A JP 29049192 A JP29049192 A JP 29049192A JP H06140011 A JPH06140011 A JP H06140011A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve body
- battery
- lead wire
- internal pressure
- 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
-
- 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.
【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
ために設けられている。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。したがって、ストッパ３は貫通孔
５を有し、貫通孔５を通過したガスが、弁体２の内面を
押圧して変形するようにしている。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
When the valve body 2 is deformed by an abnormal pressure, the lead wire 4 is prevented from moving together with the valve body 2, and the valve body 2 and the lead wire 4 are prevented.
Disconnect from. 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 この状態においては、弁体２がリード線４に接続されて
いる。それは、電池の内圧に押圧されて弁体２が変形さ
れないからである。したがって、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がリード線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、電池は内部で電流を遮断する。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る。著しく変形した弁体２
の一部が破壊される。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。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 being pressed by the internal pressure of the battery. Therefore, the battery cap 6
Connected to the power generation element 7 via the valve body 2 and the lead wire 4,
It is ready to be energized. 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 stopper 3 prevents the lead wire 4 from rising. 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 disconnected from the lead wire 4, the battery internally cuts off the current. 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 becomes higher, the amount of deformation of the valve body 2 becomes larger as shown in FIG. Significantly deformed valve body 2
Part of 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特長がある。しかしながら、この
構造の密閉電池は、作動圧の工程管理を簡単にできない
欠点がある。それは、電池を組み立てた状態で作動圧を
検査するからである。すなわち、弁体２をリード線４に
接続して作動圧を検査するので、電池として組立ない限
り、弁体２がリード線４から離れる圧力を検査できな
い。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. There is a feature that can be prevented. However, the sealed battery having this structure has a drawback that the process control of the operating pressure cannot be performed easily. This is because the working pressure is checked with the battery assembled. That is, since the valve body 2 is connected to the lead wire 4 and the operating pressure is inspected, the pressure at which the valve body 2 separates from the lead wire 4 cannot be inspected unless assembled as a battery.
【０００６】さらに、この構造の密閉電池は、弁体２と
リード線４との接続強度を高い精度で制御するのが難し
い。弁体２とリード線４との接続強度は、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
力に影響を与える。両者の接続強度が弱いと、弁体２か
らリード線４は外れ易く、低圧力のときに電池の内部が
遮断されて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ない。この状態になる
と、電池の内圧が著しく上昇する弊害がある。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。Further, in the sealed battery having this structure, it is difficult to control the connection strength between the valve body 2 and the lead wire 4 with high accuracy. The connection strength between the valve body 2 and the lead wire 4 affects 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. If the connection strength between the two is weak, the lead wire 4 is likely to come off from the valve body 2, and the inside of the battery is shut off at low pressure and cannot be reused. On the contrary, 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. In this state, the internal pressure of the battery is significantly increased. Therefore, it is important to control the connection strength between the valve body 2 and the lead wire 4 with high accuracy.
【０００７】さらにまた、弁体をリード線に接続する密
閉電池は、リード線と弁体とを溶着等の方法で接続する
必要がある。いいかえると、弁体とリード線とを弾性的
に押圧する構造とすることができない。それは、リード
線が充分な強度を有しないからである。自由に変形でき
るリード線は、弁体を弾性的に押圧しても、充分な押圧
力で接触できない。Furthermore, in the sealed battery for connecting the valve body to the lead wire, it is necessary to connect the lead wire and the valve body by a method such as welding. In other words, the structure that elastically presses the valve body and the lead wire cannot be used. This is because the lead wire does not have sufficient strength. The freely deformable lead wire cannot contact with a sufficient pressing force even if the valve body is elastically pressed.
【０００８】本発明は、この欠点を解決することを目的
に開発されたものである。本発明の重要な目的は、電流
を遮断する作動圧を高精度に調整できると共に、工程管
理を簡素化できる構造とする防爆型の密閉電池を提供す
ることにある。The present invention was developed to solve this drawback. An important object of the present invention is to provide an explosion-proof sealed battery having a structure capable of adjusting the operating pressure for cutting off the current with high accuracy and simplifying the process control.
【０００９】[0009]
【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、内圧が上昇すると変
形する弁体２と、弁体２をリード線４に電気的に接続す
る弁保持体９と、弁保持体９と発電素子７とを接続する
リード線４とを備えている。弁体２は、電池の内圧が上
昇すると変形する。したがって、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
形する強度を有する。弁保持体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。リード線４は、発電素子７を弁
保持体９に接続する。弁体２と弁保持体９とは導電性を
有し、弁体２は、弁保持体９を介してリード線４に接続
されている。The sealed battery of the present invention has the following constitution in order to achieve the above-mentioned object. That is, in the explosion-proof sealed battery of the present invention, the valve body 2 that deforms when the internal pressure rises, the valve holding body 9 that electrically connects the valve body 2 to the lead wire 4, the valve holding body 9 and the power generating element 7 are provided. And a lead wire 4 for connecting with. The valve body 2 deforms when the internal pressure of the battery rises. Therefore, the valve body 2 has a strength that airtightly closes the opening of the battery and deforms as the pressure inside the battery increases. The valve holding 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. The lead wire 4 connects the power generation element 7 to the valve holding body 9. The valve body 2 and the valve holding body 9 are electrically conductive, and the valve body 2 is connected to the lead wire 4 via the valve holding body 9.
【００１０】この構造の密閉電池は、電池の内圧が上昇
すると、弁体２が変形して弁保持体９から離れる。弁体
２が弁保持体９から離れると、弁体２と弁保持体９との
通電が遮断され、弁体２とリード線４との接続は遮断さ
れる。すなわち、本発明の防爆型の密閉電池は、従来の
電池のように、弁体２を直接にリード線４に接続するこ
となく、弁体２を弁保持体９に接続し、弁保持体９を介
して弁体２とリード線４とを接続している。In the sealed battery having this structure, when the internal pressure of the battery rises, the valve body 2 is deformed and separated from the valve holding body 9. When the valve body 2 separates from the valve holding body 9, the energization between the valve body 2 and the valve holding body 9 is cut off, and the connection between the valve body 2 and the lead wire 4 is cut off. That is, unlike the conventional battery, the explosion-proof sealed battery of the present invention connects the valve body 2 to the valve holding body 9 without directly connecting the valve body 2 to the lead wire 4, and the valve holding body 9 The valve body 2 and the lead wire 4 are connected via.
【００１１】[0011]
【作用】本発明の防爆型の密閉電池は、内圧が異常に上
昇すると、弁体２と弁保持体９との接続を切り離す。従
来のように、弁体２とリード線４との接続を遮断するも
のではない。リード線４は、弁体２ではなく、弁保持体
９に接続されているので、内圧が上昇すると弁保持体９
を介して弁体２から切り離される。弁保持体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と弁保
持体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る。In the explosion-proof sealed battery of the present invention, when the internal pressure rises abnormally, the valve body 2 and the valve holding body 9 are disconnected. Unlike the conventional case, the connection between the valve body 2 and the lead wire 4 is not cut off. Since the lead wire 4 is connected to the valve holding body 9 instead of the valve body 2, when the internal pressure rises, the valve holding body 9
It is separated from the valve body 2 via. The valve holder 9 is the valve body 2
And the lead wire 4 are electrically connected, the valve body 2 and the lead wire 4 are disconnected when the valve body 2 and the valve holding body 9 are disconnected.
The connection with is also disconnected.
【００１２】この構造の密閉電池は、下記のように作動
して、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は弁保持体９に接続され
る。弁保持体９はリード線４に接続されているので、弁
体２は弁保持体９を介してリード線４に接続される。し
たがって、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５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、弁保
持体９の上面から離れる。したがって、弁体２とリード
線４とが切り離され、電流が遮断される。 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６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
は一部が破壊される。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 this structure operates in the following manner to prevent the internal pressure from rising. 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 valve holding body 9. Since the valve holding body 9 is connected to the lead wire 4, the valve body 2 is connected to the lead wire 4 via the valve holding body 9. Therefore, 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 pushed up valve body 2 separates from the upper surface of the valve holding body 9. Therefore, the valve body 2 and the lead wire 4 are separated and the current is cut off. 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 larger as shown in FIG. Significantly deformed valve body 2
Is partially 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. 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 does not necessarily need to destroy the valve body 2.
【００１３】[0013]
【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、タイプ、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 includes the types of components, types, materials,
The shape, structure, and arrangement are not specified below.
The sealed battery of the present invention can be modified in various ways within the scope of the claims.
【００１４】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 easier understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims 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.
【００１５】図４に示す防爆型の密閉電池は、外装缶１
０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.
0, a power generation element 7 made of a +/- electrode plate housed in the outer can 10, and a sealing body 1 for closing the opening of the outer can 10. 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.
【００１６】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 is caulked and fixed to the outer can 10 via an insulating packing 11 to hermetically close the outer can 10. The sealing body 1 cuts off the current when the internal pressure of the battery rises. After the electric current is cut off, the internal gas is exhausted when the internal pressure further rises.
【００１７】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、弁保持体９とを備える。キャ
ップ６と弁体２と弁保持体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と弁保持体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と弁保持体９とは円盤状に切断されている。金属板
である弁保持体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と弁保持体９との間には絶縁パッキン
１２が挟着される。In order to realize this, the sealing body 1 is
The cap 6, the valve body 2, and the valve holding body 9 are provided. Since the cap 6, the valve body 2, and the valve holding body 9 are required to have electrical conductivity, they are manufactured by pressing a metal plate. In the sealing body 1 having this structure, the cap 6 serves as a + electrode. The cap 6 is connected to the + electrode plate which is the power generating element 7 via the valve body 2, the valve holding body 9 and the lead wire 4. The cap 6, the valve body 2, and the valve holding body 9 are cut into a disc shape. The peripheral edge of the valve holder 9 which is a metal plate is bent upward so that the valve body 2
And the cap 6 are crimped so that the three metal plates are connected to each other. Although the cap 6 and the valve body 2 are in direct contact with each other, the insulating packing 12 is sandwiched between the valve body 2 and the valve holding body 9.
【００１８】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は中心部分を下方
に突出させ、突出部分を弁保持体９に溶接している。弁
体２と弁保持体９とは、スポット溶接、あるいは超音波
溶接して接続できる。The cap 6 is pressed into a convex shape at the center,
The gas vent hole 8 is opened. The central portion of the valve body 2 is projected downward, and the protruding portion is welded to the valve holding body 9. The valve body 2 and the valve holding body 9 can be connected by spot welding or ultrasonic welding.
【００１９】弁体２は、電池の内圧が設定圧になると、
図５に示すように変形して、弁保持体９から切り離され
る。弁体２が弁保持体９から切り離される強度は、弁体
２を弁保持体９に溶接する強度と、弁体２の変形強度と
で調整できる。弁体２を弁保持体９に強く溶接し、ま
た、弁体２を厚い金属板として変形強度を強くすると、
弁体２が弁保持体９から離れ難くなる。すなわち、電流
を遮断する電池の設定圧が高くなる。反対に、弁体２を
弁保持体９に溶接する強度を弱くし、弁体２を薄い金属
板とすると、電流を遮断する設定圧を低くできる。In the valve body 2, when the internal pressure of the battery reaches the set pressure,
It is deformed as shown in FIG. 5 and separated from the valve holder 9. The strength with which the valve body 2 is separated from the valve holding body 9 can be adjusted by the strength of welding the valve body 2 to the valve holding body 9 and the deformation strength of the valve body 2. If the valve element 2 is strongly welded to the valve holding element 9 and the valve element 2 is made of a thick metal plate to increase the deformation strength,
The valve body 2 becomes difficult to separate from the valve holding body 9. That is, the set pressure of the battery that cuts off the current becomes high. On the contrary, if the strength for welding the valve body 2 to the valve holding body 9 is weakened and the valve body 2 is a thin metal plate, the set pressure for interrupting the current can be lowered.
【００２０】さらに、弁体２は、電流を遮断した後、さ
らに内圧が上昇すると、図６に示すうように、一部を破
壊して、電池内のガスを封口体１から外部に排気する。
したがって、弁体２は、電流を遮断する設定圧よりもさ
らに高い第２の設定圧になると破壊するように、切欠１
３を設けている。切欠１３は、図７ａ、ｂ、ｃに示すよ
うに、弁体２の中心から放射状に、方形状に、点状に設
けることができる。Further, when the internal pressure of the valve body 2 is further increased after the current is cut off, a part of the valve body 2 is broken and the gas in the battery is exhausted from the sealing body 1 to the outside as shown in FIG. .
Therefore, the valve body 2 is notched so that the valve body 2 is destroyed when the second set pressure is higher than the set pressure at which the current is cut off.
3 is provided. The notches 13 can be provided radially from the center of the valve body 2, in a rectangular shape, and in a dot shape as shown in FIGS. 7 a, b, and c.
【００２１】さらに、切欠１３は、図８ａ、ｂ、ｃに示
すように、弁体２に半円状に設けることもできる。半円
状の切欠１３を有する弁体２は、電池の内圧が第２の設
定圧になると、図８ｂに示すように切欠１３で破壊され
る。この状態で破壊された弁体２は、その後に電池の内
圧が低下しても、弁体２が弁保持体９に再接触するのを
防止できる。それは、片方が破壊された弁体２は、もと
の形状に復元するときに、破壊した切欠１３が当たるか
らである。さらに、この形状の切欠１３は、破壊したと
きに、弁体２から分離した破片ができず、破片が弁体２
を弁保持体９にショートすることがない。Further, the notch 13 can be provided in the valve body 2 in a semicircular shape as shown in FIGS. 8a, 8b and 8c. The valve body 2 having the semicircular notch 13 is broken by the notch 13 as shown in FIG. 8b when the internal pressure of the battery reaches the second set pressure. The valve body 2 destroyed in this state can prevent the valve body 2 from re-contacting the valve holding body 9 even if the internal pressure of the battery drops thereafter. This is because the valve body 2 of which one side has been broken hits the broken notch 13 when the valve body 2 is restored to its original shape. Further, the notch 13 having this shape does not generate a separated piece from the valve body 2 when it is broken, and the broken piece is
Is not short-circuited with the valve holder 9.
【００２２】切欠１３は、図４ないし図６、および図８
に示すように、上面に溝を設け、あるいは、図９に示す
ように、弁体２の両面に溝を設けて形成される。The notch 13 is shown in FIG. 4 to FIG. 6 and FIG.
The groove is formed on the upper surface as shown in FIG. 9 or the groove is formed on both surfaces of the valve body 2 as shown in FIG.
【００２３】弁保持体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、ガスを弁保持
体９に貫通させて、電池の内圧で弁体２を変形させる。
弁保持体９の下面にはリード線４が接続される。リード
線４は、弁保持体９を発電素子７に接続する。すなわ
ち、図４に示す封口体１は、キャップ６を、弁体２と弁
保持体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 valve holder 9 has a gas passage hole 14 penetrating therethrough. The gas permeation hole 14 allows gas to pass through the valve holder 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 valve holder 9. The lead wire 4 connects the valve holder 9 to the power generation element 7. That is, in the sealing body 1 shown in FIG. 4, the cap 6 is connected to the power generation element 7 via the valve body 2, the valve holding body 9 and the lead wire 4.
【００２４】図４ないし図６に示す密閉電池の封口体１
は、弁体２を弁保持体９に溶接して接続している。本発
明の密閉電池は、図１０と図１１とに示すように、弁体
２を弾性的に弁保持体９に押圧して電気的に接続するこ
ともできる。これ等の図に示す封口体１は、弁体２をよ
り確実に弁保持体９に接続するために、弁保持体９に貫
通孔１５を設けている。弁体２には、貫通孔１５に挿入
される凸起１６を設けている。さらに、弁体２が弁保持
体９に接触する圧力を調整し、また、弁体２が図１１に
示すように変形する電池の設定圧を調整するために、弁
体２とキャップ６の間に弾性リング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を弁保持体９に押圧している。弾性リング１
７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は弁保持体９から離れ難くなって、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。Sealing body 1 for the sealed battery shown in FIGS. 4 to 6.
Connects the valve body 2 to the valve holding body 9 by welding. In the sealed battery of the present invention, as shown in FIGS. 10 and 11, the valve body 2 can be elastically pressed against the valve holding body 9 to be electrically connected. The sealing body 1 shown in these drawings has a through hole 15 in the valve holding body 9 in order to connect the valve body 2 to the valve holding body 9 more reliably. The valve body 2 is provided with a protrusion 16 to be inserted into the through hole 15. Further, in order to adjust the pressure at which the valve body 2 comes into contact with the valve holding body 9 and also the set pressure of the battery at which the valve body 2 deforms as shown in FIG. The elastic ring 17 is disposed on the. The elastic ring 17 elastically presses the upper surface of the valve body 2 to press the valve body 2 against the valve holding body 9. Elastic ring 1
When the inner diameter of 7 is reduced and the pressing force of the valve body 2 is increased,
The valve body 2 becomes difficult to separate from the valve holding body 9, and the set pressure for cutting off the current becomes high. For the elastic ring 17, a cylinder or a coil spring that elastically deforms can be used.
【００２５】さらに、図１０と図１１とに示す密閉電池
の封口体１は、弁保持体９の上面で貫通孔１５の周縁に
絶縁樹脂１８を塗布している。絶縁樹脂１８は、図１１
に示すように、切欠１３が破壊した弁体２が、弁保持体
９に再接続するのを防止する。それは、一旦切欠１３が
破壊した弁体２は、電池の内圧が低下して、もとの形状
に復元しても、凸起１６の位置がずれて絶縁樹脂１８の
表面に接触するからである。切欠１３が破壊した後、凸
起１６がもとの位置に復元しないように、弁体２は半円
形の切欠１３を設ける。Further, in the sealed body 1 of the sealed battery shown in FIGS. 10 and 11, the insulating resin 18 is applied to the peripheral edge of the through hole 15 on the upper surface of the valve holder 9. The insulating resin 18 is shown in FIG.
As shown in FIG. 3, the valve body 2 in which the notch 13 is broken is prevented from being reconnected to the valve holding body 9. This is because the valve body 2 once the notch 13 breaks contacts the surface of the insulating resin 18 with the position of the protrusion 16 displaced even if the internal pressure of the battery is reduced and the valve body 2 is restored to its original shape. . After the cutout 13 is broken, the valve body 2 is provided with a semicircular cutout 13 so that the protrusion 16 does not return to its original position.
【００２６】さらに図１２と図１３には、弁体２をラプ
チャーディスクとした密閉電池の封口体１を示してい
る。この図に示す弁体２は、中央部分に、下方に突出す
る湾曲部１９を設け、湾曲部１９を弁保持体９に接続し
ている。湾曲部１９は、電池の内圧が設定圧になると、
図１３に示すように上方に反転して変形する。湾曲部１
９が反転されると、弁体２は弁保持体９から切り離され
る。ラプチャーディスクである弁体２は、図１４に示す
ように、湾曲部１９に半円形の切欠１３を設けている。
切欠１３は、電池の内圧が第２の設定圧に上昇すると図
１３に示すように破壊される。Further, FIGS. 12 and 13 show the sealed body 1 of the sealed battery in which the valve body 2 is a rupture disk. The valve body 2 shown in this figure is provided with a bending portion 19 projecting downward in the central portion, and the bending portion 19 is connected to the valve holding body 9. When the internal pressure of the battery reaches the set pressure, the bending portion 19
As shown in FIG. 13, it is inverted and deformed upward. Curved part 1
When 9 is inverted, the valve body 2 is separated from the valve holding body 9. As shown in FIG. 14, the valve body 2, which is a rupture disc, has a semicircular cutout 13 in the curved portion 19.
The notch 13 is broken as shown in FIG. 13 when the internal pressure of the battery rises to the second set pressure.
【００２７】キャップ６と弁体２と弁保持体９とを積層
した封口体１は、下記の工程で組立できる。 図１５に示すように、周縁を上方に折曲した弁保持
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を積層する。 図１６に示すように、弁体２の中心を弁保持体９の
上面に溶接した後、弁体２の上にキャップ６を積層す
る。 その後、弁保持体９の周縁を折り曲げ、弁保持体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。The sealing body 1 in which the cap 6, the valve body 2 and the valve holding body 9 are laminated can be assembled in the following steps. As shown in FIG. 15, the ring-shaped insulating packing 12 is fitted into the valve holder 9 whose peripheral edge is bent upward, and the disk-shaped valve body 2 is stacked on the insulating packing 12. As shown in FIG. 16, after welding the center of the valve body 2 to the upper surface of the valve holding body 9, the cap 6 is laminated on the valve body 2. After that, the periphery of the valve holder 9 is bent, and the valve holder 9 is bent.
Therefore, the peripheral edges of the valve body 2 and the cap 6 are caulked and fixed via the insulating packing 12.
【００２８】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、図１７に示すよう
に、弁保持体９の上面に、順番に、絶縁パッキン１２、
弁体２、弾性リング１７、キャップ６を積層し、弁保持
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, as shown in FIG. 17, 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 valve holding body 9 in the order of the insulating packing 12,
The valve body 2, the elastic ring 17, and the cap 6 are laminated, the peripheral edge of the valve holding body 9 is bent, and the insulating packing 12 is interposed.
The valve body 2 and the cap 6 are fixed by caulking the peripheral edges.
【００２９】[0029]
【発明の効果】本発明の防爆型の密閉電池は、弁体を直
接にはリード線に接続しない。弁体は、弁保持体を介し
てリード線に接続される。さらに、電池の内圧が上昇す
ると、弁体が弁保持体から切り離されて電流を遮断す
る。弁体と弁保持体とは封口体を製造する工程で、接続
できる。このため、本発明の密閉電池は、封口体を製造
する工程で、弁体を弁保持体から切り離す検査をするこ
とができる。密閉電池は、通電を遮断する内圧を抜き取
り検査する必要がある。従来の密閉電池は、リード線と
弁体との接続を切り離して電流を遮断するので、電池と
して組み立てた状態でなければ、電流を遮断する内圧の
試験ができなかった。これに対して、本発明の防爆型の
密閉電池は、弁体を弁保持体から切り離して電流を遮断
するので、電池として組み立てる前工程で、封口体を単
独で電流遮断圧の検査ができる。According to the explosion-proof sealed battery of the present invention, the valve body is not directly connected to the lead wire. The valve body is connected to the lead wire via the valve holder. Further, when the internal pressure of the battery rises, the valve body is separated from the valve holder to cut off the current. The valve body and the valve holding body can be connected in the process of manufacturing the sealing body. Therefore, the sealed battery of the present invention can be tested for separating the valve body from the valve holding body in the process of manufacturing the sealing body. It is necessary to inspect the sealed battery by extracting the internal pressure that interrupts energization. Since the conventional sealed battery cuts off the current by disconnecting the connection between the lead wire and the valve body, the internal pressure for cutting off the current cannot be tested unless the battery is assembled. On the other hand, in the explosion-proof sealed battery of the present invention, the valve body is separated from the valve holder to shut off the current, so that the sealing body can be independently tested for the current shut-off pressure in the previous step of assembling the battery.
【００３０】さらに、本発明の防爆型の密閉電池は、封
口体を製造する工程で、弁体を弁保持体に接続すること
ができる。このため、弁体と弁保持体とを高い精度で接
続できる。決められた強度で弁保持体に接続された弁体
は、電池の内圧が設定圧に上昇すると確実に弁保持体か
ら切り離される。このため、本発明の密閉電池は、電流
を遮断する動作圧を正確にできる。動作圧が正確な密閉
電池は、使用時の衝撃で間違って弁体が弁保持体から外
れて使用できなくなることがなく、また、内圧が設定圧
以上に上昇して電流を遮断されないことがなく、安全に
使用できる特長がある。Further, in the explosion-proof sealed battery of the present invention, the valve body can be connected to the valve holder in the process of manufacturing the sealing body. Therefore, the valve body and the valve holding body can be connected with high accuracy. The valve body connected to the valve holder with a predetermined strength is reliably separated from the valve holder when the internal pressure of the battery rises to the set pressure. Therefore, the sealed battery of the present invention can accurately set the operating pressure at which the current is cut off. A sealed battery with an accurate operating pressure does not prevent the valve disc from accidentally coming off the valve retainer and becoming unusable due to impact during use, and the internal pressure does not rise above the set pressure and the current is not interrupted. It has a feature that it can be used safely.
【００３１】さらにまた、本発明の密閉電池は、リード
線を弁保持体に接続する強度を正確に調整する必要がな
い。リード線は弁保持体に確実に離れないように接続す
ればよい。このため、電池を組み立てる工程で、リード
線を簡単に弁保持体に接続できる。このことは、封口体
を製造するときに、弁体を弁保持体に正確に接続できる
ことと相乗して、電池の組立の量産性を改善できる特長
を実現する。Furthermore, in the sealed battery of the present invention, it is not necessary to accurately adjust the strength for connecting the lead wire to the valve holder. The lead wire may be connected to the valve holder so as not to be separated from the valve holder. Therefore, the lead wire can be easily connected to the valve holder in the process of assembling the battery. This is synergistic with the fact that the valve body can be accurately connected to the valve holding body when manufacturing the sealing body, and realizes the feature that mass productivity of battery assembly can be improved.
【００３２】さらに、本発明の密閉電池は、必要なら
ば、図１０に示すように、弁体を溶着することなく弁保
持体に接触する構造とすることも可能である。Further, the sealed battery of the present invention may have a structure in which the valve body is brought into contact with the valve holder without being welded, as shown in FIG. 10, if necessary.
【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】本発明の実施例に係る密閉電池の封口体部分を
示す断面図FIG. 4 is a cross-sectional view showing a sealing body portion of a sealed battery according to an embodiment of the present invention.
【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】図４に示す密閉電池の封口体部分であって電池
の内圧が第２の設定圧以上に上昇した状態を示す断面図FIG. 6 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７】切欠を設けた弁体を示す平面図FIG. 7 is a plan view showing a valve body having a notch.
【図８】本発明の他の実施例に係る密閉電池の封口体部
分を示す断面図FIG. 8 is a sectional view showing a sealing body portion of a sealed battery according to another embodiment of the present invention.
【図９】弁体の切欠部分を示す拡大断面図FIG. 9 is an enlarged cross-sectional view showing a cutout portion of a valve body.
【図１０】さらに本発明の他の実施例に係る密閉電池に
使用する封口体の断面図FIG. 10 is a sectional view of a sealing body used in a sealed battery according to another embodiment of the present invention.
【図１１】図１０に示す封口体が設定圧以上になった状
態を示す断面図FIG. 11 is a cross-sectional view showing a state in which the sealing body shown in FIG. 10 has exceeded a set pressure.
【図１２】さらにまた本発明の他の実施例にかかる密閉
電池の封口体を示す断面図FIG. 12 is a sectional view showing a sealing body of a sealed battery according to still another embodiment of the present invention.
【図１３】図１２に示す封口体であって設定圧以上にな
った状態を示す断面図FIG. 13 is a cross-sectional view showing a state where the sealing body shown in FIG. 12 has a pressure higher than a preset pressure.
【図１４】図１２に示すラプチャーディスクである弁体
の平面図14 is a plan view of a valve body which is the rupture disc shown in FIG.
【図１５】図４に示す封口体の製造工程を示す断面図15 is a cross-sectional view showing the manufacturing process of the sealing body shown in FIG.
【図１６】図４に示す封口体の製造工程を示す断面図16 is a cross-sectional view showing a manufacturing process of the sealing body shown in FIG.
【図１７】図１０に示す封口体の製造状態を示す断面図FIG. 17 is a sectional view showing a manufacturing state of the sealing body shown in FIG.
１…封口体 ２…弁体 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…弁保持体 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…貫通孔 １６…凸起 １７…弾性リング １８…絶縁樹脂 １９…湾曲部 DESCRIPTION OF SYMBOLS 1 ... Sealing body 2 ... Valve body 3 ... Stopper 4 ... Lead wire 5 ... Through hole 6 ... Cap 7 ... Power generating element 8 ... Gas vent hole 9 ... Valve holding body 10 ... Exterior can 11 ... Insulating packing 12 ... Insulating packing 13 ... Notch 14 ... Gas permeable hole 15 ... Through hole 16 ... Projection 17 ... Elastic ring 18 ... Insulating resin 19 ... Curved portion
───────────────────────────────────────────────────── フロントページの続き (72)発明者 伊藤 桂一 大阪府守口市京阪本通２丁目18番地 三洋 電機株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiichi Ito 2-18, Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.
Claims (2)
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)に電気的に切り離し可
能に接続されている弁保持体(9)と、この弁保持体(9)と
発電素子(7)とを接続するリード線(4)とを有し、 電池の内圧が上昇すると、弁体(2)が変形して弁保持体
(9)から離れ、弁体(2)と弁保持体(9)の接続が遮断され
ることによって、弁体(2)とリード線(4)との接続が遮断
されるように構成されている防爆型の密閉電池。1. An electrically conductive valve body (2) which is airtightly closed at an opening of a battery and has a flexibility to be deformed due to a pressure increase in the battery, and the valve body (2). It has a valve retainer (9) that is electrically detachable and a lead wire (4) that connects the valve retainer (9) and the power generation element (7), increasing the internal pressure of the battery. Then, the valve body (2) is deformed and the valve holding body is deformed.
The valve body (2) and the valve retainer (9) are separated from each other by disconnecting the valve body (2) from the (9), so that the connection between the valve body (2) and the lead wire (4) is disconnected. Explosion-proof sealed battery.
ップ(6)とを挟着して封口体(1)を構成している請求項１
記載の防爆型の密閉電池。2. The sealing body (1) is formed by crimping the valve holding body (9) and sandwiching the valve body (2) and the cap (6).
Explosion-proof sealed battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29049192A JP3222952B2 (en) | 1992-10-28 | 1992-10-28 | Explosion-proof sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29049192A JP3222952B2 (en) | 1992-10-28 | 1992-10-28 | Explosion-proof sealed battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06140011A true JPH06140011A (en) | 1994-05-20 |
| JP3222952B2 JP3222952B2 (en) | 2001-10-29 |
Family
ID=17756713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29049192A Expired - Fee Related JP3222952B2 (en) | 1992-10-28 | 1992-10-28 | Explosion-proof sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3222952B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0992334A (en) * | 1995-09-21 | 1997-04-04 | Fuji Photo Film Co Ltd | Sealed nonaqueous secondary battery |
| US5821008A (en) * | 1996-02-16 | 1998-10-13 | Fdk Corporation | Battery provided with explosion-proof components |
| JP2006338981A (en) * | 2005-06-01 | 2006-12-14 | Shin Kobe Electric Mach Co Ltd | Sealed columnar secondary battery |
| JP2009170398A (en) * | 2007-12-20 | 2009-07-30 | Komatsulite Mfg Co Ltd | Safety device for battery |
| JP2010086968A (en) * | 2008-10-02 | 2010-04-15 | Samsung Sdi Co Ltd | Secondary battery and method for forming the same |
| US20100136388A1 (en) * | 2008-12-01 | 2010-06-03 | Samsung Sdi Co., Ltd. | Cap assembly and secondary battery using the same |
| US7771863B2 (en) | 2006-11-24 | 2010-08-10 | Hitachi Vehicle Energy, Ltd. | Cylindrical secondary battery |
| US8697269B2 (en) | 2007-12-10 | 2014-04-15 | Sanyo Electric Co., Ltd. | Sealed battery |
| JP2014086319A (en) * | 2012-10-24 | 2014-05-12 | Toyota Motor Corp | Secondary battery |
| JP2014116277A (en) * | 2012-11-15 | 2014-06-26 | Toyota Industries Corp | Power storage device |
| US8962167B2 (en) | 2007-08-27 | 2015-02-24 | Samsung Sdi Co., Ltd. | Secondary battery having an insulator with protrusions |
| KR20160035617A (en) * | 2014-09-22 | 2016-04-01 | 삼성에스디아이 주식회사 | Rechargeable battery having heat resistance insulation layer |
| WO2023068203A1 (en) * | 2021-10-20 | 2023-04-27 | 三洋電機株式会社 | Cylindrical battery |
-
1992
- 1992-10-28 JP JP29049192A patent/JP3222952B2/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0992334A (en) * | 1995-09-21 | 1997-04-04 | Fuji Photo Film Co Ltd | Sealed nonaqueous secondary battery |
| US5821008A (en) * | 1996-02-16 | 1998-10-13 | Fdk Corporation | Battery provided with explosion-proof components |
| JP2006338981A (en) * | 2005-06-01 | 2006-12-14 | Shin Kobe Electric Mach Co Ltd | Sealed columnar secondary battery |
| US7771863B2 (en) | 2006-11-24 | 2010-08-10 | Hitachi Vehicle Energy, Ltd. | Cylindrical secondary battery |
| US8962167B2 (en) | 2007-08-27 | 2015-02-24 | Samsung Sdi Co., Ltd. | Secondary battery having an insulator with protrusions |
| US8697269B2 (en) | 2007-12-10 | 2014-04-15 | Sanyo Electric Co., Ltd. | Sealed battery |
| JP2009170398A (en) * | 2007-12-20 | 2009-07-30 | Komatsulite Mfg Co Ltd | Safety device for battery |
| JP2010086968A (en) * | 2008-10-02 | 2010-04-15 | Samsung Sdi Co Ltd | Secondary battery and method for forming the same |
| US8993138B2 (en) | 2008-10-02 | 2015-03-31 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| US8486546B2 (en) * | 2008-12-01 | 2013-07-16 | Samsung Sdi Co., Ltd. | Cap assembly and secondary battery using the same with notched vent member |
| JP2010129546A (en) * | 2008-12-01 | 2010-06-10 | Samsung Sdi Co Ltd | Cap assembly and secondary battery using the same |
| US20100136388A1 (en) * | 2008-12-01 | 2010-06-03 | Samsung Sdi Co., Ltd. | Cap assembly and secondary battery using the same |
| JP2014086319A (en) * | 2012-10-24 | 2014-05-12 | Toyota Motor Corp | Secondary battery |
| US10224533B2 (en) | 2012-10-24 | 2019-03-05 | Toyota Jidosha Kabushiki Kaisha | Secondary battery comprising current interrupt device |
| JP2014116277A (en) * | 2012-11-15 | 2014-06-26 | Toyota Industries Corp | Power storage device |
| KR20160035617A (en) * | 2014-09-22 | 2016-04-01 | 삼성에스디아이 주식회사 | Rechargeable battery having heat resistance insulation layer |
| WO2023068203A1 (en) * | 2021-10-20 | 2023-04-27 | 三洋電機株式会社 | Cylindrical battery |
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|---|---|
| JP3222952B2 (en) | 2001-10-29 |
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