JPH01309252A - Seald battery - Google Patents
Seald batteryInfo
- Publication number
- JPH01309252A JPH01309252A JP63138274A JP13827488A JPH01309252A JP H01309252 A JPH01309252 A JP H01309252A JP 63138274 A JP63138274 A JP 63138274A JP 13827488 A JP13827488 A JP 13827488A JP H01309252 A JPH01309252 A JP H01309252A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- groove
- notch
- pressure
- branch
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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
-
- 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)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
【発明の詳細な説明】
［１７ｆ業上の利用分野］
本発明は、防爆型の密閉電池に関する。更に詳しくは、
金属製電池缶の底板に切欠きを設けた防爆型密閉電池に
関する。DETAILED DESCRIPTION OF THE INVENTION [17f Industrial Application Field] The present invention relates to an explosion-proof sealed battery. For more details,
This invention relates to an explosion-proof sealed battery that has a notch in the bottom plate of a metal battery can.
［従来の技術］
従来、密閉型電池においては、電池内圧力が′電池缶あ
るいは電池封口部の限界耐圧以上になって爆発を引き起
こさないように、あらかしめ特定の切込部を設け、切裂
により、圧力を開放する提案（実公昭５８−１７３３２
号）、偏平形密閉電池に関し、電池缶内の圧力が上昇し
た際の応力がもつとも集中する部分の耐圧を他の部分に
対し、相対的に下げる目的で切欠を設す方法（実開昭６
０−６５９７０号）、電池容器の底部に溝を形成するに
あたり、底部に平坦部を有し、底部中心に交点を持つ溝
を形成する方法（特開昭６３−８６２４４号、特開昭６
３−８６２４６号）、電池容器の底部の内面側に？１４
をつける方法（特開昭５３−８６２４５号）等がある。[Prior Art] Conventionally, in sealed batteries, specific notches are provided in advance to prevent the internal pressure of the battery from exceeding the limit pressure resistance of the battery can or battery sealing part, causing an explosion. Proposal to release the pressure by
For flat sealed batteries, a method in which cutouts are provided for the purpose of lowering the pressure resistance of the parts where stress is concentrated when the pressure inside the battery case increases relative to other parts (Utility Model No. 6)
0-65970), a method of forming a groove at the bottom of a battery container with a flat part at the bottom and an intersection at the center of the bottom (JP-A-63-86244, JP-A-6
3-86246), on the inner surface of the bottom of the battery container? 14
There is a method of attaching a mark (Japanese Patent Application Laid-open No. 53-86245).
また、電池内カス圧上昇時に作動する各種の過圧放出安
全弁も提案されている。特開昭６２−９０８８３号の如
く、正極にリチウム複合金属酸化物を用い、負極に特定
カーボン質を用い、過塩素酸リチウムを電解質とし、ブ
ロビレンカーホネートを溶媒とする非水系二次電池の場
合には、通常使用時には全く圧力か？Ｅ電池缶内かから
ない。両極活物質や電解質が水分、酸素と反応すると性
能が低下することから、安全弁は不適であり、電池容器
をハーメチックシールにより封口し、完全密閉構造を採
用することが好ましい。しかし密閉性が高まり、貯蔵性
にｆ量れる反面、高温加熱されたり、高電圧で充電され
る等の異常環境下では、電池内部圧力が上昇し、電池が
破裂音を伴って破裂し、電池内容物が飛散して電池使用
の本体機器に損傷を与えるおそれがある。このハーメチ
ックシール封口の密閉電池にも切欠を施し、防爆機能を
備える必要がある。Various overpressure release safety valves have also been proposed that operate when the internal battery scum pressure increases. As disclosed in JP-A No. 62-90883, a non-aqueous secondary battery uses a lithium composite metal oxide for the positive electrode, uses a specific carbon material for the negative electrode, uses lithium perchlorate as the electrolyte, and uses brobylene carbonate as the solvent. In case of no pressure during normal use? E-Battery does not fit inside the can. If the bipolar active material or electrolyte reacts with moisture or oxygen, the performance will be degraded, so a safety valve is not suitable, and it is preferable to seal the battery container with a hermetic seal and adopt a completely sealed structure. However, while the airtightness is improved and the storage capacity is improved, under abnormal environments such as being heated to high temperatures or being charged at high voltage, the internal pressure of the battery increases and the battery explodes with a popping sound. The contents may scatter and cause damage to battery-powered equipment. This hermetically sealed sealed battery also needs to have a notch to provide explosion-proof functionality.
従来、防爆用の切欠を形成するにあたりプレス加工が採
用されているが、ステンレススチール化の場合、溝部が
加工硬化を起こし、焼鈍しなければ、防爆機能の作動圧
力が安定しなかった。溝部を鋭利なＶ字状にすると切裂
しやすい利点があるが、加工のためのポンチの耐久性が
低い欠点を有する。溝部底部に０．１〜０．２ｎ＋ｍＲ
の丸みをつける方法（実公昭５８−２６４６０号）もあ
るか、圧力上昇に鋭敏に感応しにくくなる。Conventionally, press working has been used to form explosion-proof notches, but when stainless steel is used, the grooves undergo work hardening, and unless annealing is performed, the operating pressure for the explosion-proof function is unstable. A sharp V-shaped groove has the advantage of being easy to tear, but has the disadvantage of low durability of a punch for processing. 0.1~0.2n+mR at the bottom of the groove
There is also a method of rounding the surface (Utility Model Publication No. 58-26460), or it will become less sensitive to pressure increases.
［発明が解決しようとする課題］
電池缶底部は、負極端子として機能する電池では、十字
状切込では正極表示とまぎられしく不適当であり、また
応力の集中する部分に切欠をｈ＆ずだけでは、通常時に
全く圧力のかからない電池では、安定した切裂開放圧力
が得られない。[Problems to be Solved by the Invention] For batteries that function as negative terminals, a cross-shaped notch on the bottom of a battery can is inappropriate because it can be mistaken for a positive electrode terminal, and it is inappropriate to make a notch in the area where stress is concentrated. In this case, a stable tear-opening pressure cannot be obtained with a battery that does not receive any pressure at all under normal conditions.
簡便であり、かつ経済性の高いプレス加工方法によって
、電池内圧の上昇に対応して安全性の確保される圧力範
囲で、所望の位置を切裂させ、しかも通常の使用時には
、作動しないような切欠部を設けることが必要である。By using a simple and highly economical press processing method, the desired position can be cut within a pressure range that ensures safety in response to increases in battery internal pressure, and it can also be cut at a desired position in a pressure range that does not operate during normal use. It is necessary to provide a notch.
本発明は、異常環境下での圧力上昇時に電池缶底部に安
定した防爆機能を発揮させる切欠構造を有する密閉電池
を提供することを目的とする。An object of the present invention is to provide a sealed battery having a notch structure that allows the bottom of the battery can to exhibit a stable explosion-proof function when pressure increases under abnormal environments.
［課題を解決するための手段］
本発明は金属製電池缶の底板に切欠部を有する密閉電池
において、底板の中心部を通る位置に底板の内外両面か
ら切欠かれた直線状の切欠溝か設けられ、切欠溝は内面
における溝幅が外面における溝幅より大きく、かつ直線
状切欠溝の両端部または両端部近傍から分岐したそれぞ
れ少なくとも２本の分岐切欠溝が設けられていることを
特徴とする。[Means for Solving the Problems] The present invention provides a sealed battery having a notch in the bottom plate of a metal battery can, in which a linear notch groove cut out from both the inside and outside of the bottom plate is provided at a position passing through the center of the bottom plate. The notched groove is characterized in that the groove width on the inner surface is larger than the groove width on the outer surface, and at least two branched notched grooves are provided each branching from both ends or near both ends of the linear notched groove. .
本発明においては、ステンレススチール、ニッケルメッ
キ加工炭素鋼等の金属製電池缶の底板の両面に切欠部を
設ける。切欠部は、底板の中心を通る直線部分を有し、
直線部分の両端には、少なくとも二つの直線または円弧
の分岐部分があり、それらは直線部に対し対称に位置し
、その分岐先端は、それぞれ直線部に対し、１２０度以
上１５０度以内、好ましくは１３０度以上１４５度以内
にある。分岐先端は、缶周縁より少なくとも１ｍｍは離
れている。In the present invention, notches are provided on both sides of the bottom plate of a battery can made of metal such as stainless steel or nickel-plated carbon steel. The notch has a straight portion passing through the center of the bottom plate,
There are at least two straight line or circular arc branch parts at both ends of the straight part, which are located symmetrically with respect to the straight part, and each branch tip is at least 120 degrees and within 150 degrees, preferably at least 150 degrees with respect to the straight part. It is between 130 degrees and 145 degrees. The branch tip is at least 1 mm away from the can periphery.
また、分岐部分は、破線状であってもよく直線部分とは
必ずしも結節していなくても良い。両面に設けられた切
欠部断面は電池缶内側の切欠溝は缶外側の切欠溝に比し
て浅く、かつ溝幅は広い。Further, the branched portion may be in the shape of a broken line and may not necessarily be connected to the straight portion. In the cross section of the notches provided on both sides, the notch groove on the inside of the battery can is shallower and wider than the notch groove on the outside of the can.
かかる切欠付与により、プレス加工の溝加工用ポンチの
耐久性が、片面のみに切欠をつける場合に比して著しく
向上する。By providing such a notch, the durability of the groove forming punch for press working is significantly improved compared to the case where a notch is provided only on one side.
缶外側の切欠溝の先端は、ｏ、ｏｉ〜０．０４ｍｍＲの
丸味を帯びていても良い。The tip of the notch groove on the outside of the can may be rounded with a radius of o, oi to 0.04 mm.
切欠部の肉厚を２０μｍ〜５０μｍの範囲で変えて、電
池缶内圧１５〜４５ｋｇ／ｃｍ２の圧力範囲の所望の作
動圧力とする。The wall thickness of the notch is varied in the range of 20 μm to 50 μm to obtain a desired operating pressure in the battery can internal pressure range of 15 to 45 kg/cm 2 .
［作 用］
本発明により電池缶底部の中心付近で安定して切裂させ
ることができる。分岐の切欠きは、切欠部の圧力による
変形を切欠溝の直線部分中央に集中させる役割をはたし
、両面の切欠により再現よく中心部を切裂させる。特に
直線部の溝幅を、内面で広く、外面で狭くしであるので
、缶内の圧力上昇に際して、外面の切欠部のノツチ効果
によって、切裂が安定して行われる。[Function] According to the present invention, it is possible to stably tear the bottom of the battery can near the center. The branch notch serves to concentrate the deformation due to the pressure of the notch to the center of the straight part of the notch groove, and the notches on both sides cause the central part to be cut with good reproducibility. In particular, the width of the groove in the straight portion is wide on the inner surface and narrow on the outer surface, so that when the pressure inside the can increases, cutting is stably performed due to the notch effect of the notch on the outer surface.
［実施例コ つぎに実施例をあげて本発明を説明する。[Example code] Next, the present invention will be explained with reference to Examples.
実施例１
ステンレススチール族の厚さ０．３ｍｍの有底円筒缶の
底部にプレス加工により切欠部を形成した。Example 1 A notch was formed in the bottom of a 0.3 mm thick bottomed cylindrical can made of stainless steel by press working.
第１図は、電池内容物の記載を省いた電池容器全体の断
面図を示す。１は電池缶であり、２はガラス−メタルシ
ール付電池封口蓋である。電池缶１の厚さはやや誇張し
て示されている。FIG. 1 shows a cross-sectional view of the entire battery container without showing the contents of the battery. 1 is a battery can, and 2 is a battery sealing lid with a glass-metal seal. The thickness of the battery can 1 is shown slightly exaggerated.
第２図は電池缶１の底面図、すなわち電池缶の底板部分
を示す図である。図示されるように底板には直線部３お
よびその両端部の対称な分岐部４からなる切欠溝が設け
られている。第２図におけるＸ−Ｘ’線断面の拡大図を
第３図に、Ｙ−Ｙ’線断面を第４図に示す。缶底直径２
５ｍ＋ｎに対し、直線部分の長さ７ ｍｍ、分岐部分の
一辺の長さ６ＩＩＩａ＋とした。FIG. 2 is a bottom view of the battery can 1, that is, a diagram showing the bottom plate portion of the battery can. As shown in the figure, the bottom plate is provided with a cutout groove consisting of a straight part 3 and symmetrical branch parts 4 at both ends thereof. FIG. 3 is an enlarged view of the cross section taken along line XX' in FIG. 2, and FIG. 4 is a cross section taken along line Y-Y' in FIG. Can bottom diameter 2
5m+n, the length of the straight part was 7 mm, and the length of one side of the branched part was 6IIIa+.
第３図の電池缶内側の切欠溝幅ａは０．７８ｍｍ、電池
缶外側の切欠溝幅すは、０．３７ｍｍであった。こうし
て形成された薄肉部５の厚さｔは３０μｍであった。第
５図には、分岐部４０基幹直線３に対する角度αを示し
、その角度は１３８度であった。空気圧により、内容物
を未充填の電池缶内に圧力をかけ、電池缶底部が切裂す
る圧力を求めたところ、ｌＯケすべてが１８ｋｇ／ ｃ
＋ｎ２−２４ｋｇ／ｃｍ２の範囲に入り、直線部３の中
央部で切裂した。In FIG. 3, the notch width a on the inside of the battery can was 0.78 mm, and the width of the notch groove on the outside of the battery can was 0.37 mm. The thickness t of the thin portion 5 thus formed was 30 μm. FIG. 5 shows the angle α of the branch portion 40 with respect to the main straight line 3, and the angle was 138 degrees. When pressure was applied to the unfilled battery can using air pressure and the pressure at which the bottom of the battery can was torn was determined, it was 18 kg/c.
+n2-24 kg/cm2, and was cut at the center of the straight section 3.
実施例２
ニッケルメッキ加工炭素鋼製の厚さ０．３ｍｍの有底円
筒缶の底部にプレス加工により切欠部を形成した。第６
図に切欠部が設けられた電池缶底部を示す。本実施例に
おいては、切欠溝は直線部３と、対称な円弧状分岐部６
を有し、底板の内外両面から切欠きが施されている。缶
底直径１５ｍｍに対し、直線部分３の長さ５ ｍｍ、分
岐部分６の円弧の先端と分岐基点との直線距離は３．０
ｍｍとした。電池缶内側の切欠溝幅は、０．８０ｍｍ
、電池缶外側の切欠溝幅は、０．３６ｍｍであった。薄
肉部の厚さは、４５μｍであった。第７図に示す如く、
分岐先端の基幹直線に対する角度は１３２度であった。Example 2 A notch was formed in the bottom of a bottomed cylindrical can made of nickel-plated carbon steel and having a thickness of 0.3 mm by press working. 6th
The figure shows the bottom of a battery can with a cutout. In this embodiment, the notch grooves are a straight part 3 and a symmetrical arc-shaped branch part 6.
It has a notch on both the inside and outside of the bottom plate. For a can bottom diameter of 15 mm, the length of the straight part 3 is 5 mm, and the straight line distance between the tip of the arc of the branch part 6 and the branch base point is 3.0 mm.
mm. The width of the notch groove inside the battery can is 0.80mm.
The width of the notch groove on the outside of the battery can was 0.36 mm. The thickness of the thin portion was 45 μm. As shown in Figure 7,
The angle of the branch tip with respect to the main straight line was 132 degrees.
空気圧により、内容物を未充填の電池缶内に圧力をかけ
電池缶底部が切裂する圧力を求めたところ、１０ケすべ
てが１７ｋｇ／ｃｍ’−２７ｋｇ／ｃｍ２の範囲に入り
、基幹直線中央部で切裂した。When we applied air pressure to the unfilled battery can and determined the pressure at which the bottom of the battery can was torn, all 10 cases fell within the range of 17 kg/cm'-27 kg/cm2, and the center of the basic straight line It was torn apart.
切裂が安定して行われるためには、分岐部の形状にかか
わらず分岐部が直線部に関して対称に設けられ、かつ分
岐部の先端と分岐点を結ぶ直線が直線部となす角度が１
２０度以上１６０度以内であることが好ましく、さらに
１３０度以上１４５度以内であることがより好ましい。In order for the cutting to be performed stably, the bifurcation must be symmetrical with respect to the straight line, regardless of its shape, and the angle between the straight line connecting the tip of the bifurcation and the bifurcation point must be 1.
The angle is preferably 20 degrees or more and 160 degrees or less, and more preferably 130 degrees or more and 145 degrees or less.
この角度が１２０度未満および１６０度を越えると、直
線部中央における安定な切裂が生じない。If this angle is less than 120 degrees or more than 160 degrees, stable tearing at the center of the straight portion will not occur.
切欠による薄肉部の肉厚は、電池缶の材質および切裂を
生じさせるための設定圧力によって定められる。The thickness of the thin walled portion formed by the notch is determined by the material of the battery can and the set pressure for causing the tear.
比較例１
ステンレススチール族の厚さ０．３＋＋ｌＩｎの有底円
筒缶の底部に、プレス加工により切欠部を形成した。第
８図に切欠部が設けられた電池缶底部を示す。×−×′
線断面の拡大図を第９図に示す。Comparative Example 1 A notch was formed in the bottom of a bottomed cylindrical can made of stainless steel and having a thickness of 0.3++ lIn by press working. FIG. 8 shows the bottom of a battery can provided with a notch. ×−×′
An enlarged view of the line cross section is shown in FIG.
缶底直径２５ｍｍに対し、直線部分７の長さ７ ｍｍ。The length of the straight portion 7 is 7 mm for a can bottom diameter of 25 mm.
分岐部分８の一辺の長さ６ｍｍとした。切欠は缶の外面
からのみ設けた。分岐先端の直線部７に対する角度は９
０度であった。The length of one side of the branch portion 8 was 6 mm. The notch was made only from the outside of the can. The angle of the branch tip to the straight part 7 is 9
It was 0 degrees.
第９図の電池缶外側の切欠溝幅Ｃは、０．３７ｍｍであ
った。薄肉部９の厚さｔは３０μｍであった。The notch width C on the outside of the battery can in FIG. 9 was 0.37 mm. The thickness t of the thin portion 9 was 30 μm.
空気圧により、内容物を未充填の電池缶内に圧力をかけ
、電池缶底部が切裂する圧力を求めたところ、直線部分
で切裂したが、開裂位置は一定せず、切裂する圧力範囲
も１２ｋｇ／ ｃｍ” −３５ｋｇ／ｃｍ２となり、安
定しなかった。When air pressure was applied to an unfilled battery can to determine the pressure at which the bottom of the battery can was torn, it was found that the bottom of the battery was torn in a straight line, but the position of the rupture was not constant, and the pressure range at which it would break was determined. The temperature was also 12 kg/cm" - 35 kg/cm2, and it was not stable.
切欠部を缶の内面にのみ設けた場合も切裂の情況は不安
定であった。Even when the notch was provided only on the inner surface of the can, the situation of tearing was unstable.
［発明の効果コ
以上、説明したように、本発明では、切欠溝の直線部分
の両面に切欠を有し、電池缶内側の切欠溝が缶外側の切
欠溝より大きくし、直線部分の両端に所定の角度の分岐
をつけることにより、所望の圧力で切裂することができ
た。[Effects of the Invention] As explained above, in the present invention, the linear portion of the notched groove has notches on both sides, the notched groove on the inside of the battery can is made larger than the notched groove on the outside of the can, and the notched groove is made on both ends of the straight portion. By providing a branch at a predetermined angle, it was possible to cut with the desired pressure.
第１図は本発明実施例の電池容器の断面図、第２図は電
池容器の底面図、
第３図および第４図はそれぞれ第２図のＸ−Ｘ’に沿っ
た拡大断面図およびＹ−Ｙ’線に沿った断面図、第５図
は分岐切欠溝と直線切欠溝の角度を示す平面図、
第６図は本発明の他の実施例の底面図、第７図は分岐切
欠溝と直線切欠溝の角度を示す平面図、
第８図は比較例の底面図、
第９図は第８図のＸ−Ｘ’線に沿った断面図である。
１・・・電池缶、
２・・・ガラス−メタルシール付電池封口蓋、３・・・
切欠溝、
４・・・分岐切欠溝、
５・・・薄肉部。
第１図FIG. 1 is a sectional view of a battery container according to an embodiment of the present invention, FIG. 2 is a bottom view of the battery container, and FIGS. 3 and 4 are enlarged sectional views taken along line X-X' in FIG. 5 is a plan view showing the angle between the branch notch groove and the straight notch groove, FIG. 6 is a bottom view of another embodiment of the present invention, and FIG. 7 is a branch notch groove. 8 is a bottom view of a comparative example, and FIG. 9 is a sectional view taken along line XX' in FIG. 8. 1...Battery can, 2...Battery sealing lid with glass-metal seal, 3...
Notch groove, 4... Branch notch groove, 5... Thin wall portion. Figure 1
Claims (1)
て、前記底板の中心を通る位置に該底板の内外両面から
切欠かれた直線状の切欠溝が設けられ、該切欠溝は内面
における溝幅が外面における溝幅より大きく、かつ該直
線状切欠溝の両端部または両端部近傍から分岐したそれ
ぞれ少なくとも２本の分岐切欠溝が設けられていること
を特徴とする密閉電池。In a sealed battery having a notch in the bottom plate of a metal battery can, a linear notch groove cut out from both the inside and outside of the bottom plate is provided at a position passing through the center of the bottom plate, and the notch groove has a groove width on the inner surface. 1. A sealed battery comprising at least two branch notched grooves each having a width larger than the groove width on the outer surface and branching from both ends or near both ends of the linear notched groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63138274A JP2653832B2 (en) | 1988-06-07 | 1988-06-07 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63138274A JP2653832B2 (en) | 1988-06-07 | 1988-06-07 | Sealed battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01309252A true JPH01309252A (en) | 1989-12-13 |
| JP2653832B2 JP2653832B2 (en) | 1997-09-17 |
Family
ID=15218086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63138274A Expired - Lifetime JP2653832B2 (en) | 1988-06-07 | 1988-06-07 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2653832B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005071836A (en) * | 2003-08-26 | 2005-03-17 | Toshiba Shomei Precision Kk | Sealing plate and sealed battery |
| JP2005071648A (en) * | 2003-08-28 | 2005-03-17 | Toshiba Battery Co Ltd | Sealed battery |
| JP2005235531A (en) * | 2004-02-18 | 2005-09-02 | Hitachi Maxell Ltd | Sealed battery |
| JP2006155971A (en) * | 2004-11-26 | 2006-06-15 | Nec Tokin Corp | Secondary battery |
| JP2006338981A (en) * | 2005-06-01 | 2006-12-14 | Shin Kobe Electric Mach Co Ltd | Sealed columnar secondary battery |
| JP2012069424A (en) * | 2010-09-24 | 2012-04-05 | Nisshin Steel Co Ltd | Method and apparatus of manufacturing safety valve of battery, and safety valve |
| WO2012132879A1 (en) * | 2011-03-31 | 2012-10-04 | 日新製鋼株式会社 | Battery safety valve manufacturing method, battery safety valve manufacturing device, battery safety valve, and battery case lid manufacturing method |
| JP2014103026A (en) * | 2012-11-21 | 2014-06-05 | Hitachi Vehicle Energy Ltd | Storage element |
| JP2016051656A (en) * | 2014-09-01 | 2016-04-11 | 株式会社豊田自動織機 | Power storage device |
| JP2017084974A (en) * | 2015-10-28 | 2017-05-18 | ニチコン株式会社 | Sealing body and electrolytic capacitor |
| US10333121B2 (en) | 2013-03-25 | 2019-06-25 | Kabushiki Kaisha Toyota Jidoshokki | Electric storage device |
| WO2023068203A1 (en) | 2021-10-20 | 2023-04-27 | 三洋電機株式会社 | Cylindrical battery |
-
1988
- 1988-06-07 JP JP63138274A patent/JP2653832B2/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005071836A (en) * | 2003-08-26 | 2005-03-17 | Toshiba Shomei Precision Kk | Sealing plate and sealed battery |
| JP2005071648A (en) * | 2003-08-28 | 2005-03-17 | Toshiba Battery Co Ltd | Sealed battery |
| JP2005235531A (en) * | 2004-02-18 | 2005-09-02 | Hitachi Maxell Ltd | Sealed battery |
| JP2006155971A (en) * | 2004-11-26 | 2006-06-15 | Nec Tokin Corp | Secondary battery |
| JP2006338981A (en) * | 2005-06-01 | 2006-12-14 | Shin Kobe Electric Mach Co Ltd | Sealed columnar secondary battery |
| JP2012069424A (en) * | 2010-09-24 | 2012-04-05 | Nisshin Steel Co Ltd | Method and apparatus of manufacturing safety valve of battery, and safety valve |
| WO2012132879A1 (en) * | 2011-03-31 | 2012-10-04 | 日新製鋼株式会社 | Battery safety valve manufacturing method, battery safety valve manufacturing device, battery safety valve, and battery case lid manufacturing method |
| JP2012212569A (en) * | 2011-03-31 | 2012-11-01 | Nisshin Steel Co Ltd | Manufacturing method of lid of battery case |
| US9508968B2 (en) | 2011-03-31 | 2016-11-29 | Nisshin Steel Co., Ltd. | Method and apparatus for manufacturing a battery safety valve, a battery safety valve, and method for manufacturing a battery case lid |
| JP2014103026A (en) * | 2012-11-21 | 2014-06-05 | Hitachi Vehicle Energy Ltd | Storage element |
| US10333121B2 (en) | 2013-03-25 | 2019-06-25 | Kabushiki Kaisha Toyota Jidoshokki | Electric storage device |
| JP2016051656A (en) * | 2014-09-01 | 2016-04-11 | 株式会社豊田自動織機 | Power storage device |
| JP2017084974A (en) * | 2015-10-28 | 2017-05-18 | ニチコン株式会社 | Sealing body and electrolytic capacitor |
| WO2023068203A1 (en) | 2021-10-20 | 2023-04-27 | 三洋電機株式会社 | Cylindrical battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2653832B2 (en) | 1997-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5817332Y2 (en) | sealed battery | |
| EP0573998B1 (en) | Sealed battery | |
| US4028478A (en) | Safety switch for sealed galvanic cells | |
| TWI289370B (en) | Safety valve for cell | |
| JPH01309252A (en) | Seald battery | |
| JPH07169452A (en) | Explosionproof container | |
| EP0228149A2 (en) | Pressure release vent | |
| JP2653833B2 (en) | Sealed battery | |
| US20020064706A1 (en) | Secondary lithium battery construction for improved heat transfer | |
| JPH04349347A (en) | Sealed battery | |
| JPH09129195A (en) | Explosion-proof sealing plate | |
| CN114762180A (en) | Sealed battery | |
| KR20040110599A (en) | Secondary battery and method for fabricating safety valve thereof | |
| CA2165152A1 (en) | Safety vent for a sealed prismatic electrical device | |
| CA1064105A (en) | Primary dry cell with masked separator | |
| JPH0590809U (en) | Square battery with safety valve | |
| JP2002175789A (en) | Flat battery and manufacturing method of the same | |
| JPH07105217B2 (en) | Non-aqueous liquid active material battery | |
| JP2870067B2 (en) | Sealed battery | |
| JPH0644025Y2 (en) | Safety valve device for organic electrolyte battery | |
| JP3213635B2 (en) | Cylindrical lithium ion secondary battery | |
| JPH11250886A (en) | Explosion-proof structure for secondary battery | |
| JPH0329883Y2 (en) | ||
| JPH043395Y2 (en) | ||
| JPH09167605A (en) | Safety structure of sealed battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080523 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090523 Year of fee payment: 12 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090523 Year of fee payment: 12 |