JP2002008615A - Sealed type battery - Google Patents
Sealed type batteryInfo
- Publication number
- JP2002008615A JP2002008615A JP2001118462A JP2001118462A JP2002008615A JP 2002008615 A JP2002008615 A JP 2002008615A JP 2001118462 A JP2001118462 A JP 2001118462A JP 2001118462 A JP2001118462 A JP 2001118462A JP 2002008615 A JP2002008615 A JP 2002008615A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- pressure
- release valve
- pressure release
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池要素を電池缶
内に収納した密閉型電池に関し、短絡等の充放電時の異
常時における電池缶内の圧力上昇の際に速やかに電池の
内部圧力を開放し、密閉型電池の破裂等の事態を回避す
ることができる安全性の大きな密閉型電池を提供するこ
とを課題とするものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed battery in which a battery element is housed in a battery can. It is an object of the present invention to provide a highly safe sealed battery that can open the battery and avoid a situation such as rupture of the sealed battery.
【０００２】[0002]
【従来の技術】小型の電子機器の電源として各種の電池
が用いられており、携帯電話、ノートパソコン、カムコ
ーダ等の電源として、小型で大容量の密閉型電池である
リチウムイオン二次電池等の非水電解液電池が用いられ
ている。これらの非水電解液電池としては、円筒型、角
型の構造を有したものが用いられている。小型の電子機
器の電源として用いられているリチウムイオン電池にお
いては、正極集電体および負極集電体にそれぞれ活物質
を塗布した後に、セパレータを介在させて積層したもの
を電池缶内に収納して密閉したものが用いられている。2. Description of the Related Art Various types of batteries are used as power supplies for small electronic devices, such as lithium-ion secondary batteries, which are small and large-capacity sealed batteries, as power supplies for mobile phones, notebook computers, camcorders and the like. Non-aqueous electrolyte batteries are used. As these non-aqueous electrolyte batteries, batteries having a cylindrical or square structure are used. In a lithium-ion battery used as a power source for small electronic devices, the active material is applied to each of the positive electrode current collector and the negative electrode current collector, and then stacked with a separator interposed between them, and stored in a battery can. And sealed.
【０００３】これらの電池では、充放電時に異常な電池
反応が進むと、電池内部で圧力が上昇し、電池の爆発、
燃焼等の事態が発生する可能性がある。そこで、充放電
時の過大な電流、電池の過充電、過放電等を検出し、電
流を遮断する等の保護回路が設けられている。ところ
が、保護回路が正常に動作しない場合や、電池が予期し
得ない異常な状態で使用された場合には、電池内部の電
池反応によって気体が発生し、電池内部の圧力が上昇
し、電池の発熱、発煙、発火等がおこり、最悪の場合に
は、破裂、爆発等の危険が生じる。[0003] In these batteries, if an abnormal battery reaction proceeds during charging and discharging, the pressure inside the battery rises, and the battery explodes,
A situation such as combustion may occur. Therefore, a protection circuit for detecting an excessive current at the time of charging / discharging, overcharging and overdischarging of the battery, and interrupting the current is provided. However, when the protection circuit does not operate properly or when the battery is used in an unexpected and abnormal condition, gas is generated due to the battery reaction inside the battery and the pressure inside the battery rises, and the battery is discharged. Heat generation, smoking, ignition, etc. occur, and in the worst case, rupture, explosion, etc. may occur.
【０００４】特に、昨今の密閉型電池の小型大容量化に
伴い、電池内部に蓄えられるエネルギー量も格段と大き
くなり、異常な電池反応が発生すると異常反応は急激に
進むために、異常反応の早い段階、すなわちより低い圧
力で電池内部の圧力を開放し、より穏やかな状態で危険
を回避することが求められている。そこで、これらの電
池には内部圧力の上昇の際に内部圧力を開放する各種の
圧力開放弁が設けられている。In particular, with the recent increase in the size and capacity of sealed batteries, the amount of energy stored inside the batteries has also increased significantly. When an abnormal battery reaction occurs, the abnormal reaction rapidly progresses. There is a need to relieve the pressure inside the battery at an early stage, i.e. at a lower pressure, and to avoid dangers in a more gentle state. Therefore, these batteries are provided with various pressure relief valves that release the internal pressure when the internal pressure increases.
【０００５】図４は、従来の電池を説明する図であり斜
視図である。密閉型電池１において電池缶２の上部の開
口部に、電流取り出し端子３等を設けたヘッダ４を溶接
して電池を作製している。このような密閉型電池におい
ては、異常な充放電が起こらないように充放電制御回路
を設けて異常時の充放電を防止している。ところが、異
常時に充放電制御回路が充分に作用しない場合には、電
池缶の内部の圧力が上昇し電池缶の破裂を防止するため
に、圧力開放弁を設けることが行われている。そこで、
ヘッダ４には、電池内部の圧力上昇時に圧力を開放する
圧力開放弁５が設けられている。圧力開放弁は、ヘッダ
の他の部分よりも厚さが薄い金属で作製した後にヘッダ
部に接合したり、ヘッダの一部をプレス加工、エッチン
グによって薄肉部を形成したり、あるいは溝状の開裂部
を設けることが行われている。FIG. 4 is a perspective view illustrating a conventional battery. In the sealed battery 1, a header 4 provided with a current extraction terminal 3 and the like is welded to an upper opening of a battery can 2 to produce a battery. In such a sealed battery, a charge / discharge control circuit is provided to prevent abnormal charge / discharge from occurring, thereby preventing charge / discharge in an abnormal state. However, when the charge / discharge control circuit does not operate sufficiently at the time of abnormality, a pressure relief valve is provided to prevent the internal pressure of the battery can from rising and the battery can from bursting. Therefore,
The header 4 is provided with a pressure release valve 5 that releases pressure when the pressure inside the battery rises. The pressure release valve is made of metal thinner than other parts of the header and then joined to the header, a part of the header is pressed, etched to form a thin part, or a groove-like split Provision of parts has been performed.
【０００６】圧力開放弁の開裂圧力は、内部圧力の増大
時に速やかに開放することが求められており、圧力増大
時に確実に開裂するように圧力開放弁の薄肉部を薄いも
のとすることが行われている。しかしながら、圧力開放
弁の薄肉部の形成によって、電池缶に脆弱部が形成され
ることとなるので、電池の強度の面からは薄肉部の形成
は好ましくない問題であった。ところが、単に薄肉部を
形成したり、あるいは溝を形成した場合にも、３ＭＰａ
程度の圧力を必要としており、０．５ＭＰａ程度の比較
的低い圧力で圧力開放弁を作動させることは困難であっ
た。そこで、比較的低い圧力で圧力開放弁を作動させる
ことができるように、所定の領域を囲繞する輪郭に沿っ
て溝を形成するとともに、溝の内側に表面側に膨出する
膨出部を形成した密閉型電池が特開平１１−２７３６４
０号公報において提案されている。The opening pressure of the pressure relief valve is required to be released promptly when the internal pressure increases, and the thin part of the pressure relief valve must be made thin so as to be surely opened when the pressure increases. Have been done. However, the formation of the thin portion of the pressure release valve results in the formation of a fragile portion in the battery can. Therefore, the formation of the thin portion is not preferable from the viewpoint of the strength of the battery. However, even when simply forming a thin portion or forming a groove, 3 MPa
Pressure is required, and it has been difficult to operate the pressure release valve at a relatively low pressure of about 0.5 MPa. Therefore, a groove is formed along the contour surrounding a predetermined area so that the pressure release valve can be operated at a relatively low pressure, and a bulging portion bulging to the surface side inside the groove is formed. Closed sealed battery is disclosed in JP-A-11-27364.
No. 0 proposes this.
【０００７】図５は、膨出部を有した圧力開放弁設けた
ヘッダを有する密閉型電池を説明する図である。図５
（Ａ）は、ヘッダを説明する平面図であり、ヘッダ４に
は、圧力開放弁５が設けられており、圧力開放弁は圧力
上昇時に開裂する薄肉部からなる溝８に囲まれた膨出部
７が形成されている。図５（Ｂ）は、図４（Ａ）におい
て、Ｃ−Ｃ’線で切断した断面図である。圧力開放弁５
は、溝８と膨出部１０を有している。電池の内圧の上昇
の結果、図５（Ｃ）に示すように、膨出部１０に内圧の
上昇が作用して薄肉部で破断し、膨出部が上部へ飛び出
すことが起こる。圧力開放弁の膨出部が飛び出し飛散片
１２が生じると使用者に危険を及ぼす可能性があり、電
池容器あるいは電池使用機器には、飛散片による機器の
損傷や事故の防止のために覆いを設けることが必要であ
った。FIG. 5 is a view for explaining a sealed battery having a header provided with a pressure release valve having a bulging portion. FIG.
(A) is a plan view for explaining the header. The header 4 is provided with a pressure release valve 5. The pressure release valve is a bulge surrounded by a groove 8 formed of a thin portion which is cleaved when the pressure rises. The part 7 is formed. FIG. 5B is a cross-sectional view taken along line CC ′ in FIG. Pressure release valve 5
Has a groove 8 and a bulging portion 10. As a result of the increase in the internal pressure of the battery, as shown in FIG. 5 (C), the increase in the internal pressure acts on the bulging portion 10 so that the bulging portion is broken at the thin portion and the bulging portion jumps out to the upper part. If the swelling portion of the pressure release valve jumps out and the scattered pieces 12 are generated, there is a possibility that a danger may be given to the user. It was necessary to provide.
【０００８】また、特開２０００−３１１６６９号に
は、薄膜円盤状であり、馬蹄形状の彫り込み部を有する
非水電解液二次電池用の安全弁が記載されている。この
ような安全弁においては、彫り込み部以外の厚みが薄い
場合、あるいは馬蹄形の彫り込み部の形状によっては、
安全弁が飛散する可能性があり、製造ロットの違いによ
る微妙な品質の相違によっても飛散する可能性があっ
た。また、安全弁が開放した場合に、厚みの厚い部分が
破壊されないようにした場合には、安全弁の開放角度は
小さくなり、圧力開放が不充分となるおそれがあった。
特にこのような構造で、小型のリチウムイオン電池のよ
うに厚みの薄い電池缶において、確実に内部圧力を開放
するとともに安全弁が飛散しないものとすることは困難
であった。Japanese Patent Application Laid-Open No. 2000-31669 describes a safety valve for a non-aqueous electrolyte secondary battery having a thin film disk shape and a horseshoe-shaped engraved portion. In such a safety valve, if the thickness other than the engraved part is thin, or depending on the shape of the horseshoe-shaped engraved part,
The safety valve may be scattered, and may be scattered even by a subtle difference in quality due to a difference in production lot. Further, when the thick portion is not broken when the safety valve is opened, the opening angle of the safety valve becomes small, and the pressure release may be insufficient.
In particular, with such a structure, it has been difficult to reliably release the internal pressure and prevent the safety valve from scattering in a thin battery can such as a small lithium ion battery.
【０００９】[0009]
【発明が解決しようとする課題】本発明は、比較的低圧
力で作動する圧力開放弁として機能する薄肉部を中央に
有し、周囲に開裂する溝を形成した圧力開放弁を設けた
密閉型電池において、圧力開放弁が作動して開裂した際
に飛散片が生じることを確実に防止した密閉型電池を提
供することを課題とするものである。また、圧力開放弁
の設置面積が小さな小型の密閉型電池においても確実に
圧力開放動作を行う圧力開放弁を有する密閉型電池を提
供することを課題とするものである。また、圧力開放弁
が作動した際には、作動した圧力開放弁の一部が電池使
用機器等に衝突して電池使用機器を損傷する可能性がな
い密閉型電池を提供することを課題とするものである。SUMMARY OF THE INVENTION The present invention relates to a hermetically sealed type having a pressure relief valve having a thin portion in the center functioning as a pressure relief valve operating at a relatively low pressure and having a groove formed in the periphery thereof. It is an object of the present invention to provide a sealed battery that reliably prevents scattered fragments from being generated when the pressure release valve is operated and ruptured. It is another object of the present invention to provide a sealed battery having a pressure relief valve that reliably performs a pressure relief operation even in a small sealed battery in which the installation area of the pressure relief valve is small. Another object of the present invention is to provide a sealed battery in which when the pressure release valve is activated, a part of the activated pressure release valve does not collide with the battery device or the like and may damage the battery device. Things.
【００１０】[0010]
【課題を解決するための手段】本発明の課題は、内部圧
力の増大によって開裂する圧力開放弁を設けた密閉型電
池において、長辺と短辺を有する矩形状もしくは長円状
の薄肉部の輪郭に沿って、一方の長辺を除いて内部圧力
の増大時に開裂する溝を形成した密閉型電池によって解
決することができる。また、圧力開放時に開裂する部分
が、矩形状もしくは長円状の平行な二つの長辺の間の間
隔よりも深い電池缶壁面に形成した凹部の底面に設けた
前記の密閉型電池である。薄肉部が、表面側に膨出した
膨出部を形成した前記の密閉型電池である。また、圧力
開放弁の溝は、先端部の一部の高さが異なる押圧治具を
使用して形成されたものである前記の密閉型電池であ
る。また、圧力開放弁の溝は、圧力開放弁の開裂しない
部分に対応する凹部を設けた基台に載置した状態で環状
の凸部を有する押圧治具によって押圧されて形成された
ものである前記の密閉型電池である。SUMMARY OF THE INVENTION An object of the present invention is to provide a sealed battery provided with a pressure release valve which is opened by an increase in internal pressure, in a rectangular or oval thin portion having a long side and a short side. The problem can be solved by a sealed battery in which a groove is formed along the contour, which is cleaved when the internal pressure increases, except for one long side. Further, the sealed battery is provided on a bottom surface of a concave portion formed on a wall surface of a battery can deeper than a space between two parallel long sides of a rectangular shape or an elliptical shape, the portion that is cleaved when pressure is released. The sealed battery according to the above, wherein the thin portion has a swelling portion swelling toward the surface. The groove of the pressure release valve is the above-mentioned sealed type battery formed by using a pressing jig in which a part of a tip portion has a different height. The groove of the pressure release valve is formed by being pressed by a pressing jig having an annular convex portion while being mounted on a base provided with a concave portion corresponding to a portion of the pressure release valve that does not cleave. This is the above sealed battery.
【００１１】[0011]
【発明の実施の形態】本発明の密閉型電池は、比較的低
い圧力によって作動させることが可能な圧力開放弁を有
した密閉型電池において、長円状、あるいは矩形状から
なる薄肉部を形成すると共に、同時に長円状もしくは矩
形状の薄肉部の輪郭に沿って、長辺の一方を除いて内部
圧力の増大時に開裂する厚みの薄い溝を形成したことに
よって、電池内部の圧力上昇時に長辺の一方を残して開
裂する圧力開放弁を形成したものである。BEST MODE FOR CARRYING OUT THE INVENTION A sealed battery according to the present invention is a sealed battery having a pressure release valve which can be operated at a relatively low pressure, wherein an oval or rectangular thin portion is formed. At the same time, a thin groove is formed along the contour of the oval or rectangular thin-walled portion, excluding one of the long sides, to be cleaved when the internal pressure increases. A pressure relief valve is formed that cleaves leaving one of the sides.
【００１２】その結果、薄肉部に沿った長辺の一方には
厚みの薄い溝が形成されていないので、圧力開放時には
長辺部においてつなぎ止められるとともに、長辺と短辺
から構成された大きな面積の開裂によって速やかな内部
圧力の放出が可能な圧力開放弁を有する密閉型電池を提
供することが可能であることを見いだしたものである。
また、電池開放弁を電池缶壁に形成した凹部に設けると
ともに、凹部の底面までの深さを、二つの長辺の間の間
隔よりも大きくしたことにより、圧力開放時には薄肉部
が電池の壁面よりも外方へ突出することがなくなり、圧
力開放時に開裂した部分の衝突による衝撃で電池使用機
器に損傷を及ぼすことがない密閉型電池を提供すること
が可能であることを見出したものである。更に、薄肉部
には、膨出部を形成することによって、比較的低い圧力
によって作動させることが可能な圧力開放弁を有する密
閉型電池を提供することが可能であることを見出したも
のである。なお、本発明において、長円状、矩形状は、
長辺と短辺で形成されている形状のものを広く意味し、
平行な二つの長辺と二つの長辺を結合する直線もしくは
曲線状の短辺からなる矩形状もしくは長円状のものを意
味するが、二つの長辺が厳密に平行なもののみを意味す
るのではなく、長辺が曲線状のものも意味する。As a result, a thin groove is not formed on one of the long sides along the thin portion, so that when the pressure is released, the long side is fixed and the large side composed of the long and short sides is formed. It has been found that it is possible to provide a sealed battery having a pressure release valve capable of rapidly releasing internal pressure by area cleavage.
In addition, the battery release valve is provided in the recess formed in the battery can wall, and the depth to the bottom surface of the recess is made larger than the distance between the two long sides. It has been found that it is possible to provide a sealed battery that does not protrude outwardly and does not damage battery-using equipment due to the impact of the collision of the part that has been split when the pressure is released. . Furthermore, it has been found that by forming a bulging portion in the thin portion, it is possible to provide a sealed battery having a pressure release valve that can be operated with a relatively low pressure. . In the present invention, the oval shape and the rectangular shape are
Widely means the shape formed by the long side and short side,
A rectangular or elliptical shape consisting of two parallel long sides and a straight or curved short side connecting the two long sides, but only those whose two long sides are exactly parallel Instead of a long side.
【００１３】図１は、本発明の密閉型電池の一実施例を
説明する図である。図１（Ａ）は、密閉型電池の上面の
ヘッダ部を説明する平面図である。また、図１（Ａ）に
おいて、圧力開放弁をＡ−Ａ’線で切断した断面図を図
１（Ｂ）に示し、圧力開放弁が作動した状態を図１
（Ｃ）に示す。電池缶のヘッダ４には、圧力開放弁５が
設けられており、圧力開放弁５は長円状の薄肉部６の輪
郭に沿って平行な長辺の一方７を除き、圧力上昇時に開
裂する溝８が形成されている。電池内部の圧力の増大に
よって圧力開放弁が作動した場合には、圧力開放弁５
は、長辺の一方７によってつなぎ止められて、圧力開放
弁５の飛散を防止することができる。本発明の密閉型電
池の圧力開放弁は、プレス成形、エッチング等によって
形成することができるが、プレス成形では成型時に使用
する治具を工夫することによって、圧力開放弁を成形の
際に溝と厚みの厚い部分も同時に作製することが可能と
なる。FIG. 1 is a view for explaining an embodiment of a sealed battery according to the present invention. FIG. 1A is a plan view illustrating a header portion on the upper surface of the sealed battery. FIG. 1B is a cross-sectional view of the pressure release valve taken along line AA ′ in FIG. 1A, and FIG.
It is shown in (C). A pressure release valve 5 is provided on the header 4 of the battery can, and the pressure release valve 5 is cleaved when the pressure rises, except for one of the long sides 7 parallel to the contour of the oval thin portion 6. A groove 8 is formed. When the pressure release valve is activated due to an increase in the pressure inside the battery, the pressure release valve 5
Are stopped by one of the long sides 7 to prevent the pressure release valve 5 from scattering. The pressure release valve of the sealed battery of the present invention can be formed by press molding, etching, or the like.In press molding, by devising a jig used at the time of molding, the pressure relief valve is formed with a groove at the time of molding. A thick part can be manufactured at the same time.
【００１４】図２は、本発明の他の実施例を説明する図
である。図２（Ａ）は、密閉型電池の上面のヘッダ部を
説明する平面図である。また、図２（Ａ）において、圧
力開放弁をＢ−Ｂ’線で切断した断面図を図２（Ｂ）に
示し、圧力開放弁が作動した状態を図２（Ｃ）に示す。
電池缶のヘッダ４には、凹部９が設けられており、凹部
９の底部に圧力開放弁５が設けられている。圧力開放弁
５には、長円状の薄肉部６の輪郭に沿って平行な長辺の
一方７を除き、圧力上昇時に開裂する溝８が形成されて
いる。また、長円状の薄肉部は、外方へ膨出した膨出部
１０を形成しており、平面状の薄肉部に比べて小さな圧
力での開裂を可能としている。更に、凹部９の深さａ
は、長円状の薄肉部の長辺間の間隔ｂよりも大きいこと
を特徴としている。その結果、図２（Ｃ）に示すよう
に、内部の圧力が高まって開裂した場合には、長辺の一
方の辺の厚みの厚い部分１１によってつなぎ止められて
薄肉部６の飛散を防止するとともに、開裂した薄肉部６
が電池缶の壁面の外方へ飛び出すことはなく、電池使用
機器等に対して損傷を及ぼすことも防止できる。また、
以上のような密閉型電池の圧力開放弁は、プレス成形に
よって形成することができるが、プレス成型時に使用す
る治具を工夫することによって、薄肉部の形成時に、溝
および厚みの厚い部分も同時に作製することが可能とな
る。FIG. 2 is a diagram for explaining another embodiment of the present invention. FIG. 2A is a plan view illustrating a header portion on the upper surface of the sealed battery. 2A, a cross-sectional view of the pressure release valve taken along line BB 'is shown in FIG. 2B, and a state in which the pressure release valve is activated is shown in FIG. 2C.
A recess 9 is provided in the header 4 of the battery can, and a pressure release valve 5 is provided at the bottom of the recess 9. The pressure release valve 5 is formed with a groove 8 that is cleaved when the pressure rises, except for one of the parallel long sides 7 along the contour of the oval thin portion 6. In addition, the oval thin portion forms a swelling portion 10 that swells outward, and enables cleavage with a smaller pressure than a flat thin portion. Further, the depth a of the recess 9
Is characterized in that it is larger than the distance b between the long sides of the oval thin portion. As a result, as shown in FIG. 2 (C), when the internal pressure is increased and the rupture is caused, the thin portion 6 is prevented from being scattered by being connected by the thick portion 11 on one of the long sides. With the thinned part 6
Does not jump out of the wall surface of the battery can and can also prevent damage to equipment using the battery. Also,
The pressure release valve of the above sealed battery can be formed by press molding, but by devising a jig used at the time of press molding, when forming a thin portion, a groove and a thick portion are simultaneously formed. It can be manufactured.
【００１５】図３は、本発明の密閉型電池の圧力開放弁
の製造工程の一例を説明する図である。図３（Ａ）は、
押圧治具に特殊な形状の治具を用いた例を示す図であ
り、断面図である。押圧治具２０は、テーパーを有した
円筒状の先端部２１を有し、薄肉部の溝形成部２２と先
端部が欠落して短くなった肉厚部形成部２３を有してお
り、平板状の基台２４に載置して押圧治具２０によって
押圧して成形することによって、薄肉部６、溝８および
厚みの厚い部分１１が同時に形成される。FIG. 3 is a view for explaining an example of a manufacturing process of the pressure release valve of the sealed battery according to the present invention. FIG. 3 (A)
It is a figure which shows the example which used the jig of a special shape for the press jig, and is sectional drawing. The pressing jig 20 has a cylindrical tip portion 21 having a taper, a groove forming portion 22 having a thin portion, and a thick portion forming portion 23 having a reduced tip portion which is shortened. The thin portion 6, the groove 8, and the thick portion 11 are formed at the same time by being placed on the base 24 and pressed and shaped by the pressing jig 20.
【００１６】また、図３（Ｂ）は、成型時の基台として
特殊な形状の基台を用いた例を示す図であり、断面図で
ある。押圧治具２０は、テーパーを有した円筒状の先端
部２１を有しており、先端部は同じ高さで作製されてい
る。一方、成型時の基台２４には、一部に凹部２５が設
けられており、基台上において成形治具２０で押圧する
と、基台の平面部に載置された部分は、薄肉部の輪郭に
溝８が形成されるとともに、基台の凹部２５に位置する
部分は、押圧治具の先端によって押圧されて凹部へ変形
することによって厚みを保持することとなり、厚みの厚
い部分が形成される。FIG. 3B is a cross-sectional view showing an example in which a specially shaped base is used as a base during molding. The pressing jig 20 has a cylindrical tip portion 21 having a taper, and the tip portion is manufactured at the same height. On the other hand, the base 24 at the time of molding is provided with a recess 25 in part, and when pressed by the molding jig 20 on the base, the portion placed on the flat surface of the base has a thin-walled portion. The groove 8 is formed in the contour, and the portion located in the concave portion 25 of the base is pressed by the tip of the pressing jig and deformed into the concave portion, thereby maintaining the thickness, and the thick portion is formed. You.
【００１７】本発明の密閉型電池は、アルミニウム製の
電池缶、ニッケルめっきした軟鋼製の電池缶等のいずれ
の材料の金属缶にも適用することが可能である。例え
ば、アルミニウム３００３を用いたアルミニウム製の電
池缶を用いた、幅２９．６ｍｍ、厚さ４．４ｍｍ、高さ
４８．０ｍｍの電池においては、図２に示した形状の長
円形の一方の長辺を除いて厚みを０．０２ｍｍの溝を形
成し、長円の一方の長辺を飛散防止用の厚みが厚い個所
の厚みを０．１ｍｍとすることによって、作動圧力０．
５ないし１．０ＭＰａであって、飛散することがない圧
力開放弁を有する密閉型電池を得ることができた。The sealed battery of the present invention can be applied to metal cans of any material such as an aluminum battery can and a nickel-plated mild steel battery can. For example, in a battery having a width of 29.6 mm, a thickness of 4.4 mm, and a height of 48.0 mm using an aluminum battery can using aluminum 3003, one of the ellipses having the shape shown in FIG. A groove having a thickness of 0.02 mm is formed excluding the sides, and one of the long sides of the ellipse is set to 0.1 mm at a place where the thickness for preventing scattering is thickened to 0.1 mm.
A sealed battery having a pressure relief valve of 5 to 1.0 MPa and never scattering was obtained.
【００１８】[0018]
【発明の効果】本発明の電池は、長円状または矩形状の
薄肉部の輪郭に沿って、長辺の一方を除いて、電池内部
圧力の増大によって開裂する溝を形成したので、電池内
部圧力の増大によって溝の部分が開裂した場合には、圧
力開放弁は大きく開放するとともに、一方の長辺の厚み
に厚い部分によって保持されるので飛散を防止すること
ができる。また、圧力開放弁を、長辺の間隔よりも深い
凹部の底部に設けた場合には、圧力開放時に圧力開放弁
が電池使用機器を損傷するおそれはない。更に、圧力開
放弁の薄肉部を外方へ膨出した膨出形状とした場合に
は、平面状にした場合に比べて作動する圧力が小さな電
池を得ることができる。以上のように、本発明によって
安全性の高い電池を提供することが可能となる。According to the battery of the present invention, a groove which is cleaved by an increase in the internal pressure of the battery is formed along the contour of the oval or rectangular thin portion except for one of the long sides. When the groove portion is torn by an increase in pressure, the pressure release valve is largely opened and is held by the thick portion on one long side, so that scattering can be prevented. Further, when the pressure release valve is provided at the bottom of the concave portion deeper than the interval between the long sides, there is no possibility that the pressure release valve will damage the battery-powered device when the pressure is released. Furthermore, when the thin portion of the pressure release valve is formed to have a bulging shape that bulges outward, it is possible to obtain a battery that operates at a lower pressure than when it is formed in a flat shape. As described above, according to the present invention, a highly safe battery can be provided.
【図１】図１は、本発明の密閉型電池の一実施例を説明
する図である。FIG. 1 is a diagram illustrating an embodiment of a sealed battery according to the present invention.
【図２】図２は、本発明の密閉型電池の他の実施例を説
明する図である。FIG. 2 is a diagram illustrating another embodiment of the sealed battery of the present invention.
【図３】図３は、本発明の密閉型電池の圧力開放弁の製
造工程の一例を説明する図である。FIG. 3 is a diagram illustrating an example of a manufacturing process of the pressure release valve of the sealed battery according to the present invention.
【図４】図４は、従来の電池を説明する図であり斜視図
である。FIG. 4 is a diagram for explaining a conventional battery and is a perspective view.
【図５】図５は、膨出部を有した圧力開放弁設けたヘッ
ダを有する密閉型電池を説明する図である。FIG. 5 is a diagram illustrating a sealed battery having a header provided with a pressure release valve having a bulging portion.
１…密閉型電池、２…電池缶、３…電流取り出し端子、
４…ヘッダ、５…圧力開放弁、６…薄肉部、７…長辺の
一方、８…溝、９…凹部、１０…膨出部、１１…厚い部
分、１２…飛散片、２０…押圧治具、２１…先端部、２
２…溝形成部、２３…肉厚部形成部、２４…平板状の基
台、２５…凹部1. Sealed battery, 2. Battery can, 3. Current extraction terminal,
4 ... Header, 5 ... Pressure release valve, 6 ... Thin part, 7 ... One of long sides, 8 ... Groove, 9 ... Concave part, 10 ... Swelling part, 11 ... Thick part, 12 ... Fragment, 20 ... Pressure recovery Tool, 21 ... tip, 2
2 ... groove forming part, 23 ... thick part forming part, 24 ... flat base, 25 ... concave part
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H012 AA07 BB02 DD01 DD05 EE04 FF01 GG01 5H029 AJ12 AM01 BJ02 BJ27 DJ02 DJ14 EJ01 HJ04 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H012 AA07 BB02 DD01 DD05 EE04 FF01 GG01 5H029 AJ12 AM01 BJ02 BJ27 DJ02 DJ14 EJ01 HJ04
Claims (2)
放弁を設けた密閉型電池において、長辺と短辺を有する
矩形状もしくは長円状の薄肉部の輪郭に沿って、一方の
長辺を除いて内部圧力の増大時に開裂する溝を形成した
ことを特徴とする密閉型電池。In a sealed battery provided with a pressure release valve that is cleaved by an increase in internal pressure, one long side is formed along the outline of a rectangular or oval thin portion having a long side and a short side. A sealed battery characterized by forming a groove that is cleaved when the internal pressure increases, except for the above.
しくは長円状の平行な二つの長辺の間の間隔よりも深い
電池缶壁面に形成した凹部の底面に設けたことを特徴と
する請求項１記載の密閉型電池。2. A method according to claim 1, wherein the portion to be cleaved when the pressure is released is provided on a bottom surface of a concave portion formed on a wall surface of the battery can, which is deeper than a space between two parallel long sides of a rectangular or oval shape. The sealed battery according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001118462A JP2002008615A (en) | 2000-04-18 | 2001-04-17 | Sealed type battery |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000116806 | 2000-04-18 | ||
| JP2000-116806 | 2000-04-18 | ||
| JP2001118462A JP2002008615A (en) | 2000-04-18 | 2001-04-17 | Sealed type battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002008615A true JP2002008615A (en) | 2002-01-11 |
Family
ID=26590323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001118462A Pending JP2002008615A (en) | 2000-04-18 | 2001-04-17 | Sealed type battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002008615A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005332700A (en) * | 2004-05-20 | 2005-12-02 | Toyota Motor Corp | Can type battery and its manufacturing method |
| JP2006244722A (en) * | 2005-02-28 | 2006-09-14 | Sanyo Electric Co Ltd | Sealed battery |
| KR100945067B1 (en) | 2004-11-18 | 2010-03-05 | 히다치 막셀 가부시키가이샤 | Sealed and square type battery |
| WO2010116504A1 (en) * | 2009-04-09 | 2010-10-14 | トヨタ自動車株式会社 | Battery, vehicle, and equipment using battery |
| US7989100B2 (en) | 2005-09-13 | 2011-08-02 | Hitachi Maxell Energy, Ltd. | Sealed prismatic battery |
| JP2011181214A (en) * | 2010-02-26 | 2011-09-15 | Hitachi Vehicle Energy Ltd | Secondary battery |
| US8053099B2 (en) | 2007-09-10 | 2011-11-08 | Samsung Sdi Co., Ltd. | Secondary battery |
| WO2012165338A1 (en) * | 2011-05-31 | 2012-12-06 | 日立ビークルエナジー株式会社 | Rectangular battery |
| JP2013168295A (en) * | 2012-02-16 | 2013-08-29 | Hitachi Vehicle Energy Ltd | Nonaqueous electrolyte secondary battery |
| JP2013206814A (en) * | 2012-03-29 | 2013-10-07 | Gs Yuasa Corp | Exterior container, and power storage element |
| CN114792865A (en) * | 2021-01-25 | 2022-07-26 | 泰星能源解决方案有限公司 | Sealing plate with gas discharge valve and secondary battery using same |
| WO2023000202A1 (en) * | 2021-07-21 | 2023-01-26 | 宁德时代新能源科技股份有限公司 | Battery cell and manufacturing method and manufacturing system therefor, battery, and electrical device |
| WO2023056719A1 (en) * | 2021-10-09 | 2023-04-13 | 宁德时代新能源科技股份有限公司 | End cover, battery cell, battery, and power-consuming device |
-
2001
- 2001-04-17 JP JP2001118462A patent/JP2002008615A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005332700A (en) * | 2004-05-20 | 2005-12-02 | Toyota Motor Corp | Can type battery and its manufacturing method |
| JP4643176B2 (en) * | 2004-05-20 | 2011-03-02 | トヨタ自動車株式会社 | Can-type battery and manufacturing method thereof |
| KR100945067B1 (en) | 2004-11-18 | 2010-03-05 | 히다치 막셀 가부시키가이샤 | Sealed and square type battery |
| JP2006244722A (en) * | 2005-02-28 | 2006-09-14 | Sanyo Electric Co Ltd | Sealed battery |
| US7989100B2 (en) | 2005-09-13 | 2011-08-02 | Hitachi Maxell Energy, Ltd. | Sealed prismatic battery |
| US8053099B2 (en) | 2007-09-10 | 2011-11-08 | Samsung Sdi Co., Ltd. | Secondary battery |
| US8911889B2 (en) | 2009-04-09 | 2014-12-16 | Toyota Jidosha Kabushiki Kaisha | Battery, vehicle, and battery-operated equipment |
| US20120021262A1 (en) * | 2009-04-09 | 2012-01-26 | Kazuyuki Kusama | Battery, vehicle, and battery-operated equipment |
| CN102388482A (en) * | 2009-04-09 | 2012-03-21 | 丰田自动车株式会社 | Battery, vehicle, and equipment using battery |
| KR101136320B1 (en) | 2009-04-09 | 2012-04-20 | 도요타지도샤가부시키가이샤 | Battery, vehicle, and equipment using battery |
| WO2010116504A1 (en) * | 2009-04-09 | 2010-10-14 | トヨタ自動車株式会社 | Battery, vehicle, and equipment using battery |
| CN102388482B (en) * | 2009-04-09 | 2013-08-28 | 丰田自动车株式会社 | Battery, vehicle, and equipment using battery |
| JP2011181214A (en) * | 2010-02-26 | 2011-09-15 | Hitachi Vehicle Energy Ltd | Secondary battery |
| US8753760B2 (en) | 2010-02-26 | 2014-06-17 | Hitachi Vehicle Energy, Ltd. | Secondary battery with gas release valve |
| CN103597630A (en) * | 2011-05-31 | 2014-02-19 | 日立车辆能源株式会社 | Rectangular battery |
| EP2738836A1 (en) * | 2011-05-31 | 2014-06-04 | Hitachi Vehicle Energy, Ltd. | Rectangular battery |
| WO2012165338A1 (en) * | 2011-05-31 | 2012-12-06 | 日立ビークルエナジー株式会社 | Rectangular battery |
| EP2738836A4 (en) * | 2011-05-31 | 2015-04-22 | Hitachi Automotive Systems Ltd | Rectangular battery |
| JP2013168295A (en) * | 2012-02-16 | 2013-08-29 | Hitachi Vehicle Energy Ltd | Nonaqueous electrolyte secondary battery |
| JP2013206814A (en) * | 2012-03-29 | 2013-10-07 | Gs Yuasa Corp | Exterior container, and power storage element |
| CN114792865A (en) * | 2021-01-25 | 2022-07-26 | 泰星能源解决方案有限公司 | Sealing plate with gas discharge valve and secondary battery using same |
| EP4033578A1 (en) * | 2021-01-25 | 2022-07-27 | Prime Planet Energy & Solutions, Inc. | Sealing plate including gas release vent and secondary battery using sealing plate |
| WO2023000202A1 (en) * | 2021-07-21 | 2023-01-26 | 宁德时代新能源科技股份有限公司 | Battery cell and manufacturing method and manufacturing system therefor, battery, and electrical device |
| WO2023056719A1 (en) * | 2021-10-09 | 2023-04-13 | 宁德时代新能源科技股份有限公司 | End cover, battery cell, battery, and power-consuming device |
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