JPH0467301B2 - - Google Patents
Info
- Publication number
- JPH0467301B2 JPH0467301B2 JP57162038A JP16203882A JPH0467301B2 JP H0467301 B2 JPH0467301 B2 JP H0467301B2 JP 57162038 A JP57162038 A JP 57162038A JP 16203882 A JP16203882 A JP 16203882A JP H0467301 B2 JPH0467301 B2 JP H0467301B2
- Authority
- JP
- Japan
- Prior art keywords
- sealing lid
- thickness
- battery
- battery case
- welding
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001039 duplex stainless steel Inorganic materials 0.000 claims description 4
- 238000003466 welding Methods 0.000 description 18
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- SOZVEOGRIFZGRO-UHFFFAOYSA-N [Li].ClS(Cl)=O Chemical compound [Li].ClS(Cl)=O SOZVEOGRIFZGRO-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- KPZGRMZPZLOPBS-UHFFFAOYSA-N 1,3-dichloro-2,2-bis(chloromethyl)propane Chemical compound ClCC(CCl)(CCl)CCl KPZGRMZPZLOPBS-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000002759 woven fabric Substances 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- 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)
Description
本発明はハーメチツクシールを採用する密閉形
電池の改良に係り、電池ケースと封口蓋との溶接
不良の発生を防止することを目的とする。
たとえば塩化チオニルーリチウム電池などのよ
うに高度の密閉性が要求される電池では密閉手段
としてハーメチツクシールが採用されている。こ
のハーメチツクシールの場合、電池ケースと封口
蓋との接合は溶接で行なわれ、封口蓋のボデイー
部は電池ケースとの溶接性や塩化チオニルの強い
腐食作用に対する耐性を考慮して、電池ケースと
同様にSUS304、SUS304Lなどのオーステナイト
系ステンレス鋼で形成されている。
ところが、封口蓋のボデイー部の場合は、ガラ
スまたはセラミツクスで形成される絶縁部の強度
を保つ必要があることから、一定の板厚を必要と
し、従来使用のSUS304、SUS304Lなどでは、第
３図に示すように、封口蓋５のボデイー部８の板
厚が電池ケース４の板厚より厚くなり（約２倍程
度である）、そのため溶接時に高い入熱が必要と
なつて、電池ケース内に充填されている活物質、
セパレータなどの内容物や、ガラスまたはセラミ
ツクスで形成される絶縁部に悪影響を及ぼしやす
く、また不均一加熱となるため溶接そのものも良
好な強度が得られないという問題がある。
本発明はそのような事情に鑑みてなされたもの
であり、封口蓋のボデイー部にSUS329J1、
SUS329J2などの２相ステンレス鋼を用いること
によつて、封口蓋のボデイー部の厚さを電池ケー
スの厚さとほぼ同じ厚さまでに薄肉化できるよう
にし、前記の諸問題を解決したものである。
本発明においてボデイー部の形成材料として用
いるSUS329J1やSUS329J2などの２相ステンレ
ス鋼は、従来使用のSUS304などの抗張力が焼鈍
状態で45〜55Kg／mm2であるのに対し、70〜90Kg／
mm2という高抗張力を有するので、たとえ薄肉化し
てもガラスまたはセラミツクスで形成される絶縁
部を充分に保持することができる。
ボデイー部の薄肉化は、絶縁部の材質や大きさ
などによつても多少異なるが、電池ケースの厚さ
に対して１：0.9〜1.8程度まで薄くすることが可
能である。
そして上記のSUS329J1やSUS329J2などの２
相ステンレス鋼は電池ケースに一般に使用されて
いるSUS304やSUS304Lとの溶接性もよく、また
耐腐食性もすぐれている。
つぎに本発明の実施例を図面とともに説明す
る。第１図は本発明の密閉形電池の一実施例を示
す半裁断面図であり、図面において、１はリチウ
ムよりなる負極で、２はガラス繊維付織布よりな
るセパレータであり、３は炭素多孔質成形体より
なる正極である。４はステンレス鋼製の電池ケー
スであり、この電池ケース４はその内周面に上記
リチウム負極１が圧着されていて負極端子を兼ね
ている。５は封口蓋で、この封口蓋５は中央部に
正極側の端子部６と、該端子部６の外周側に位置
するガラスまたはセラミツクよりなる絶縁部７
と、該絶縁部７の外周側に位置する環状で２相ス
テンレス鋼製のボデイー部８を有してなり、この
実施例ではボデイー部８はその外周部および内周
部がともに上方に隆起した形状をしている。そし
てボデイー部８の外周部は電池ケース４の開口端
部と溶接され、内周部には上記絶縁部７が溶着さ
れている。端子部６は金属製パイプ９と金属細棒
１０とで形成され、金属細棒１０の下部は正極３
内に達していて正極集電体としての役目をはた
し、上部はパイプ９の上端部と溶接されて正極端
子１１を構成している。そして、この実施例で
は、パイプ９は耐熱ステンレス鋼製のものが用い
られ、金属細棒１０はステンレス鋼製のものが用
いられている。なお、端子部６の形成は、端子部
構成部材としてのパイプ９をあらかじめ絶縁部７
の内周側に溶着しておき、封口蓋６を電池ケース
４に溶接し、電解液を該パイプ９から注入したの
ち、金属細棒１０をパイプ９に挿入し、パイプ９
と金属細棒１０を溶接することによつて行なわれ
ている。１２および１３はセパレーター２と同質
材料で形成された上蓋および下蓋であり、電解液
としては塩化チオニルに四塩化アルミニウムリチ
ウムを溶解させたものが使用され、上記塩化チオ
ニルは同時に正極活物質としての作用をはたすも
のである。
このような本発明の電池においては、ボデイー
部８を構成する２相ステンレス鋼が強度が大き
く、たとえボデイー部８を薄肉化しても絶縁部７
を保持しうることから、たとえば第２図に詳示す
るように、ボデイー部８の厚さを電池ケース４の
厚さとほぼ同じ厚さにすることができる。従つ
て、封口蓋５と電池ケース４との溶接に際し、従
来のように高い入熱を必要とせず、その結果、従
来電池に見られたような絶縁部の破損や溶接不良
の発生などを防止することができる。なお、第２
図は封口蓋５と電池ケース４との溶接開始前の状
態を示し、この第２図と第３図では繁雑化を避け
るため後方の輪郭線は省略されている。
つぎの第１表は本発明の電池ＡおよびＢと従来
電池ＣおよびＤの封口蓋のボデイー部の外周部と
電池ケースの開口端部との溶接時の不良発生を調
べた結果を示すものである。溶接不良には溶接が
不完全なものと、溶接はできたが絶縁部の破損が
生じたもののとの両者を含んでいる。電池は直径
14.5mmの塩化チオニルーリチウム電池で絶縁部は
ガラスで形成されており、溶接はプラズマアーク
により行なわれ、溶接条件は本発明の電池Ａおよ
びＢの場合と従来電池Ｃの場合は最適条件が選ば
れ、従来電池Ｄの場合は本発明の電池と同条件が
選ばれている。上記電池Ａ〜Ｄの電池ケースはい
ずれもSUS304製で厚さは0.3mmであり、封口蓋の
ボデイー部は本発明の電池Ａの場合はSUS329J1
製で厚さは0.3mmで、本発明の電池Ｂの場合は
SUS329J2製で厚さは0.3mmであり、従来電池Ｃお
よびＤの場合はいずれもSUS304製で厚さは0.6mm
である。これら封口蓋のボデイー部の材質および
厚さ、電池ケースの材質および厚さならびに溶接
条件を第２表にまとめて示す。
The present invention relates to an improvement in a sealed battery that employs a hermetic seal, and an object of the present invention is to prevent the occurrence of poor welding between the battery case and the sealing lid. For example, in batteries that require a high degree of sealing, such as lithium thionyl chloride batteries, hermetic seals are used as a sealing means. In the case of this hermetic seal, the battery case and the sealing lid are joined by welding, and the body of the sealing lid is attached to the battery case in consideration of weldability with the battery case and resistance to the strong corrosive action of thionyl chloride. Similarly, it is made of austenitic stainless steel such as SUS304 and SUS304L. However, in the case of the body part of the sealing lid, it is necessary to maintain the strength of the insulating part made of glass or ceramics, so a certain plate thickness is required, and the conventionally used SUS304, SUS304L, etc. As shown in the figure, the thickness of the body part 8 of the sealing lid 5 is thicker than the thickness of the battery case 4 (approximately twice as much), and therefore a high heat input is required during welding, causing heat to build up inside the battery case. active material filled,
There is a problem in that it tends to have an adverse effect on the contents of the separator and other insulating parts made of glass or ceramics, and that good strength cannot be obtained during welding itself due to uneven heating. The present invention was made in view of such circumstances, and the body part of the sealing lid is made of SUS329J1,
By using duplex stainless steel such as SUS329J2, the thickness of the body of the sealing lid can be reduced to approximately the same thickness as the battery case, thereby solving the aforementioned problems. In the present invention, the duplex stainless steels such as SUS329J1 and SUS329J2 used as the material for forming the body part have a tensile strength of 70 to 90 Kg/mm 2 in the annealed state, whereas the tensile strength of conventionally used SUS304 is 45 to 55 Kg/mm 2 in the annealed state.
Since it has a high tensile strength of mm 2 , it can sufficiently hold an insulating part made of glass or ceramics even if the thickness is reduced. Although the thickness of the body part varies somewhat depending on the material and size of the insulating part, it is possible to make the body part thinner by about 1:0.9 to 1.8 with respect to the thickness of the battery case. And 2 such as SUS329J1 and SUS329J2 mentioned above.
Compatible stainless steel has good weldability with SUS304 and SUS304L, which are commonly used for battery cases, and also has excellent corrosion resistance. Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a half-cut sectional view showing an embodiment of the sealed battery of the present invention. In the drawing, 1 is a negative electrode made of lithium, 2 is a separator made of a woven fabric with glass fibers, and 3 is a carbon porous The positive electrode is made of a quality molded body. Reference numeral 4 denotes a battery case made of stainless steel, and the lithium negative electrode 1 is crimped onto the inner peripheral surface of the battery case 4, which also serves as a negative electrode terminal. Reference numeral 5 denotes a sealing lid, and this sealing lid 5 has a positive electrode side terminal portion 6 in the center, and an insulating portion 7 made of glass or ceramic located on the outer peripheral side of the terminal portion 6.
and an annular body part 8 made of duplex stainless steel located on the outer peripheral side of the insulating part 7, and in this embodiment, the body part 8 has both the outer peripheral part and the inner peripheral part raised upward. It has a shape. The outer circumferential portion of the body portion 8 is welded to the open end of the battery case 4, and the insulating portion 7 is welded to the inner circumferential portion. The terminal part 6 is formed of a metal pipe 9 and a thin metal rod 10, and the lower part of the thin metal rod 10 is connected to the positive electrode 3.
It reaches inside and serves as a positive electrode current collector, and its upper part is welded to the upper end of the pipe 9 to form a positive electrode terminal 11. In this embodiment, the pipe 9 is made of heat-resistant stainless steel, and the thin metal rod 10 is made of stainless steel. Note that in forming the terminal portion 6, the pipe 9 as a component of the terminal portion is preliminarily connected to the insulating portion 7.
After welding the sealing lid 6 to the battery case 4 and injecting the electrolyte through the pipe 9, insert the thin metal rod 10 into the pipe 9, and
This is done by welding the thin metal rod 10 to the metal rod 10. 12 and 13 are upper and lower lids made of the same material as separator 2, and the electrolyte used is lithium aluminum tetrachloride dissolved in thionyl chloride, and the thionyl chloride is also used as a positive electrode active material. It is something that works. In such a battery of the present invention, the duplex stainless steel that constitutes the body portion 8 has high strength, and even if the body portion 8 is made thinner, the insulating portion 7
For example, as shown in detail in FIG. 2, the thickness of the body portion 8 can be made approximately the same as the thickness of the battery case 4. Therefore, when welding the sealing lid 5 and the battery case 4, there is no need for high heat input as in the conventional case, and as a result, damage to the insulation part and occurrence of welding defects, which are seen in conventional batteries, are prevented. can do. In addition, the second
The figure shows the state before the start of welding between the sealing lid 5 and the battery case 4, and the rear outline is omitted in FIGS. 2 and 3 to avoid complication. Table 1 below shows the results of an investigation into the occurrence of defects during welding between the outer periphery of the sealing lid body and the open end of the battery case in Batteries A and B of the present invention and conventional batteries C and D. be. Defective welding includes both incomplete welding and successful welding, but with damage to the insulation. battery diameter
This is a 14.5 mm lithium thionyl chloride battery, and the insulating part is made of glass. Welding is performed by plasma arc, and optimal welding conditions are selected for batteries A and B of the present invention and conventional battery C. In the case of conventional battery D, the same conditions as those for the battery of the present invention were selected. The battery cases of the batteries A to D above are all made of SUS304 and have a thickness of 0.3 mm, and the body part of the sealing lid is SUS329J1 in the case of battery A of the present invention.
In the case of battery B of the present invention, the thickness is 0.3 mm.
It is made of SUS329J2 and has a thickness of 0.3mm, whereas conventional batteries C and D are both made of SUS304 and have a thickness of 0.6mm.
It is. Table 2 summarizes the material and thickness of the body portion of these sealing lids, the material and thickness of the battery case, and the welding conditions.
【表】【table】
【表】
第１表に示す結果から明らかなように、本発明
によれば溶接不良の発生を効果的に防止すること
ができる。[Table] As is clear from the results shown in Table 1, according to the present invention, it is possible to effectively prevent the occurrence of welding defects.
第１図は本発明の密閉形電池の一実施例を示す
半截断面図で、第２図は第１図に示す電池の封口
蓋と電池ケースとの溶接前における要部拡大断面
図であり、第３図は従来電池の要部拡大断面図で
ある。
４……電池ケース、５……封口蓋、６……正極
側の端子部、７……絶縁部、８……ボデイー部。
FIG. 1 is a half-cut sectional view showing an embodiment of the sealed battery of the present invention, and FIG. 2 is an enlarged sectional view of the main parts of the battery shown in FIG. 1 before welding the sealing lid and the battery case. FIG. 3 is an enlarged sectional view of the main parts of a conventional battery. 4...Battery case, 5...Sealing lid, 6...Positive side terminal section, 7...Insulating section, 8...Body section.
Claims (1)
周側に位置するガラスまたはセラミツクスよりな
る絶縁部と、該絶縁部の外周側に位置する環状で
金属製のボデイー部とを有する封口蓋のボデイー
部の外周部を電池ケースの開口端部と溶接する密
閉形電池において、封口蓋のボデイー部を２相ス
テンレス鋼で形成したことを特徴とする密閉形電
池。 ２ ２相ステンレス鋼がSUS329J1または
SUS329J2である特許請求の範囲第１項記載の密
閉形電池。 ３ 封口蓋のボデイー部の厚さと電池ケースの開
口端部の厚さがほぼ同じである特許請求の範囲第
１項または第２項記載の密閉形電池。[Claims] 1. One electrode terminal member, an insulating part made of glass or ceramics located on the outer periphery of the electrode terminal member, and an annular metal body part located on the outer periphery of the insulating part. 1. A sealed battery in which the outer periphery of a body of a sealing lid is welded to an open end of a battery case, characterized in that the body of the sealing lid is made of two-phase stainless steel. 2 Duplex stainless steel is SUS329J1 or
The sealed battery according to claim 1, which is SUS329J2. 3. The sealed battery according to claim 1 or 2, wherein the thickness of the body portion of the sealing lid and the thickness of the open end of the battery case are approximately the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57162038A JPS5951458A (en) | 1982-09-16 | 1982-09-16 | Enclosed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57162038A JPS5951458A (en) | 1982-09-16 | 1982-09-16 | Enclosed battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5951458A JPS5951458A (en) | 1984-03-24 |
| JPH0467301B2 true JPH0467301B2 (en) | 1992-10-27 |
Family
ID=15746896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57162038A Granted JPS5951458A (en) | 1982-09-16 | 1982-09-16 | Enclosed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5951458A (en) |
-
1982
- 1982-09-16 JP JP57162038A patent/JPS5951458A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5951458A (en) | 1984-03-24 |
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