JPH0524622B2 - - Google Patents
Info
- Publication number
- JPH0524622B2 JPH0524622B2 JP57041923A JP4192382A JPH0524622B2 JP H0524622 B2 JPH0524622 B2 JP H0524622B2 JP 57041923 A JP57041923 A JP 57041923A JP 4192382 A JP4192382 A JP 4192382A JP H0524622 B2 JPH0524622 B2 JP H0524622B2
- Authority
- JP
- Japan
- Prior art keywords
- lid
- battery case
- battery
- welding
- body part
- 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
- 238000003466 welding Methods 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical group ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 6
- 239000000155 melt Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- SOZVEOGRIFZGRO-UHFFFAOYSA-N [Li].ClS(Cl)=O Chemical compound [Li].ClS(Cl)=O SOZVEOGRIFZGRO-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 238000007789 sealing Methods 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
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003115 supporting electrolyte 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 of a single cell or a single battery
- 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
Description
本発明はハーメチツクシールを採用する密閉形
電池の製造法の改良に係り、電池ケースと蓋との
溶接を確実にして密閉性の向上をはかることを目
的とする。
たとえば塩化チオニル−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、電池ケースと蓋と
の接合は溶接で行なわれるが、この溶接に際して
継手形状としては第３図に示すように電池ケース
４の開口部先端と蓋５のボデイー部６の外周部上
端の高さをそろえたヘリ継手が採用される。とこ
ろで、ハーメチツクシールの場合、蓋５はガラス
よりなる絶縁部７を有するので、変形による絶縁
部７の割れを防止するため、ボデイー部６は強度
以上の剛性を有することが要求され、ボデイー部
６に使用する板材の厚さは電池ケース４の板材の
厚さより厚くなつている。その結果、前記のよう
に電池ケース４の開口部先端と蓋５のボデイー部
６の外周部上端の高さをそろえて溶接すると、材
厚の薄い電池ケース４の方が早く溶け、充分な溶
接強度が得られず、極端な場合には電池ケース４
の方ばかりが溶けて蓋５の方がまつたく溶けず溶
接ができないことすらある。
本発明はそのような事情を照らし、上記のよう
に蓋のボデイー部より厚みの薄い電池ケースの開
口端部と、蓋のボデイー部の外周部とを溶接する
にあたり、電池ケースと蓋との嵌合を電池ケース
の開口部先端が蓋の外周部上端より突出するよう
に行ない、その状態から溶接を開始することによ
つて、電池ケースと蓋との溶接を確実かつ強力に
して密閉性の高い電池を提供できるようにしたも
のである。
つぎに本発明の実施例を図面とともに説明す
る。
第１図は本発明の実施例により製造された密閉
形電池の半截断面図であり、第２図は第１図に示
す電池を製造する際の溶接開始前の状態を示す要
部拡大断面図である。なお第２図においては図面
の繁雑化を避けるため後方の輪郭線は省略されて
いる。
本発明の方法により電池を製造するには電池ケ
ースに負極、セパレータ、隔離紙、正極などを挿
入したのち、電池ケースと蓋とを第２図に示すよ
うに電池ケース４の開口部先端が蓋５のボデイー
部６の外周部上端より突出した状態に嵌合する。
そして、その状態からたとえばプラズマアーク
などの加熱手段により加熱して溶接する。そうす
ると電池ケース４の蓋５の上端より突出した部分
はさきに溶けて第４図に示す（ただし、後方の輪
郭線は省略）ように蓋５のボデイー部６の外周部
上端を覆い、その状態で電池ケース４と蓋５との
溶接が進行して第１図に示すような状態になる。
そして電池ケース４の開口部先端がさきに溶けて
蓋５のボデイー部６の外周部の上部を覆う結果、
たとえ電池ケース４と蓋５との間に多少の隙間が
あつても先に溶けた電池ケースの溶融池により埋
まり溶接が可能になる。なお電池ケース４の蓋５
の外周部上端より突出させる量は電池ケース４と
蓋５に入る入熱量のバランスと電池ケース４の厚
さとの比により決定するのが好ましい。
第１図は上記のごとき溶接工程を経て製造され
た密閉形電池の半截断面図であり、１はリチウム
よりなる負極で、２はガラス繊維不織布よりなる
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は前記の電池ケースで、この電
池ケース４はステンレス鋼でつくられていて負極
端子を兼ねている。５は前記の蓋で、この蓋５は
環状で金属製のボデイー部６と該ボデイー部６の
内周側に位置しその外周面を上記ボデイー部６の
内周面に溶着した絶縁部７を有してなる。そし
て、ボデイー部６はステンレス鋼製で、その内周
側と外周側とが上方に隆起した断面形状をしてお
り、絶縁部７はガラスで形成されている。絶縁部
７の内周側にはあらかじめ耐熱ステンレス鋼製の
パイプよりなる正極集電体８が溶着されていて、
電解液はこのパイプ状の正極集電体から注入さ
れ、電解液の注入後、この正極集電体８にステン
レス鋼製の細棒を挿入し、その頭部を上記集電体
８と溶接して正極端子９としている。そして、１
０はセパレータ２と同質の材料で構成された隔離
紙である。
この電池の電解液としては塩化チオニルに支持
電解質として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。
なお前記正極３はアセチレンブラツクに結着剤と
してポリテトラフルオルエチレンを添加して成形
したものである。
つぎの第１表は本発明による場合と従来法すな
わち第３図に示す（ただし、後方の輪郭線は省
略）ように電池ケース４の開口部先端と蓋５のボ
デイー部６の外周部上端の高さをそろえて溶接し
たときの不良発生率を示すものである。電池は上
記のごとく塩化チオニルを正極活物質および電解
液の溶媒とし、リチウムを負極活物質とする直径
10mmの密閉形電池で、電池ケース４の厚さは0.3
mmであり、蓋５のボデイー部６の厚さは0.6mmで
ある。そして本発明の場合は電池ケース４と蓋５
とを電池ケース４の開口部先端が蓋５のボデイー
部６の外周部上端より0.3mm突出させた状態に嵌
合し溶接を開始している。溶接はプラズマアーク
を180Wで12秒間通電することによつて行なわれ、
第１表に示す不良には溶接が行なえなかつたもの
と溶接部分が容易に剥がれたものの両方が含まれ
ている。
The present invention relates to an improvement in the manufacturing method of a sealed battery that employs a hermetic seal, and an object of the present invention is to improve the sealing performance by ensuring welding between the battery case and the lid. For example, in batteries such as thionyl chloride-lithium batteries that require a high degree of hermeticity, a hermetic seal is used as a sealing means. In the case of this hermetic seal, the battery case and the lid are joined by welding, and the shape of the joint during this welding is between the opening tip of the battery case 4 and the body part 6 of the lid 5, as shown in FIG. A helical joint is used that has the same height at the top of the outer periphery. By the way, in the case of a hermetic seal, since the lid 5 has an insulating part 7 made of glass, the body part 6 is required to have a rigidity higher than the strength in order to prevent the insulating part 7 from cracking due to deformation. The thickness of the plate material used for the portion 6 is thicker than that of the battery case 4. As a result, when welding the tip of the opening of the battery case 4 and the upper edge of the outer periphery of the body part 6 of the lid 5 at the same height as described above, the thinner battery case 4 melts faster and the welding is sufficient. In extreme cases where strength cannot be obtained, use the battery case 4.
In some cases, only the lid 5 melts and the lid 5 does not melt so quickly that welding cannot be performed. The present invention has been developed in light of such circumstances, and in welding the opening end of the battery case, which is thinner than the body of the lid, to the outer periphery of the body of the lid as described above, it is possible to improve the fit between the battery case and the lid. By joining the battery case so that the opening tip of the battery case protrudes beyond the upper edge of the outer periphery of the lid, and starting welding from that state, the welding between the battery case and the lid is ensured and strong, resulting in a highly airtight seal. It is designed to provide batteries. Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a half-cut sectional view of a sealed battery manufactured according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of essential parts showing the state before welding is started when manufacturing the battery shown in FIG. 1. It is. Note that in FIG. 2, the rear contour line is omitted to avoid complication of the drawing. To manufacture a battery according to the method of the present invention, after inserting the negative electrode, separator, isolation paper, positive electrode, etc. into the battery case, the battery case and the lid are assembled so that the tip of the opening of the battery case 4 is connected to the lid as shown in FIG. The body portion 6 of No. 5 is fitted in such a manner that it protrudes from the upper end of the outer circumferential portion of the body portion 6. Then, from this state, welding is performed by heating using a heating means such as a plasma arc. Then, the part of the battery case 4 that protrudes from the upper end of the lid 5 melts first, covering the upper end of the outer periphery of the body part 6 of the lid 5 as shown in FIG. 4 (however, the rear outline is omitted). Welding between the battery case 4 and the lid 5 progresses, resulting in a state as shown in FIG.
As a result, the tip of the opening of the battery case 4 melts first and covers the upper part of the outer periphery of the body part 6 of the lid 5.
Even if there is some gap between the battery case 4 and the lid 5, it will be filled by the molten pool of the battery case that melted first, making welding possible. In addition, the lid 5 of the battery case 4
It is preferable that the amount of protrusion from the upper end of the outer periphery of the battery case 4 is determined based on the balance between the amount of heat input into the battery case 4 and the lid 5, and the ratio of the thickness of the battery case 4. FIG. 1 is a half-cut cross-sectional view of a sealed battery manufactured through the welding process described above, in which 1 is a negative electrode made of lithium, 2 is a separator made of glass fiber nonwoven fabric, and 3 is a carbon porous molded body. The positive electrode consists of 4 is the aforementioned battery case, which is made of stainless steel and also serves as a negative terminal. Reference numeral 5 designates the aforementioned lid, which includes an annular metal body portion 6 and an insulating portion 7 located on the inner peripheral side of the body portion 6 and whose outer peripheral surface is welded to the inner peripheral surface of the body portion 6. I have it. The body portion 6 is made of stainless steel and has an upwardly protruding cross-sectional shape on its inner and outer circumferential sides, and the insulating portion 7 is made of glass. A positive electrode current collector 8 made of a heat-resistant stainless steel pipe is welded in advance to the inner peripheral side of the insulating part 7.
The electrolytic solution is injected through this pipe-shaped positive electrode current collector, and after the electrolytic solution is injected, a thin stainless steel rod is inserted into this positive electrode current collector 8, and its head is welded to the current collector 8. and the positive electrode terminal 9. And 1
0 is a separator paper made of the same material as the separator 2. The electrolyte used in this battery is thionyl chloride in which lithium aluminum tetrachloride is dissolved as a supporting electrolyte, and the thionyl chloride also functions as a positive electrode active material.
The positive electrode 3 is formed by adding polytetrafluoroethylene as a binder to acetylene black. The following Table 1 shows the case according to the present invention and the conventional method, that is, the opening end of the battery case 4 and the upper end of the outer periphery of the body part 6 of the lid 5, as shown in FIG. 3 (however, the rear outline is omitted). This shows the failure rate when welding with the same height. As mentioned above, the battery uses thionyl chloride as the positive electrode active material and the electrolyte solvent, and lithium as the negative electrode active material.
It is a 10mm sealed battery, and the thickness of battery case 4 is 0.3
mm, and the thickness of the body portion 6 of the lid 5 is 0.6 mm. In the case of the present invention, the battery case 4 and the lid 5
and the battery case 4 are fitted in such a manner that the opening end of the battery case 4 protrudes 0.3 mm from the upper end of the outer circumference of the body part 6 of the lid 5, and welding is started. Welding is performed by applying a plasma arc at 180W for 12 seconds.
The defects shown in Table 1 include both those in which welding could not be performed and those in which the welded portion was easily peeled off.
【表】
第１表に示すように本発明の場合は不良発生が
少ない。
上記実施例では塩化チオニル−リチウム電池の
場合を例にあげたが、本発明はそれのみに限られ
るものではなく、ハーメチツクシールを採用する
アルカリ電池、有機電解質電池、さらには塩化チ
オニル−リチウム電池以外の無機系非水電解液電
池などの製造にも好適に適用されるものである。[Table] As shown in Table 1, in the case of the present invention, there were fewer defects. In the above embodiment, a case of a thionyl chloride-lithium battery was given as an example, but the present invention is not limited to this, but can also be applied to an alkaline battery that employs a hermetic seal, an organic electrolyte battery, and even a thionyl chloride-lithium battery. It can also be suitably applied to the production of inorganic non-aqueous electrolyte batteries other than batteries.
第１図は本発明の実施例により製造した密閉形
電池の半截断面図であり、第２図は第１図に示す
電池を製造する際の溶接開始前の状態を示す要部
拡大断面図である。第３図は従来法により電池を
製造する際の溶接開始前の状態を示す要部拡大断
面図である。第４図は第１図に示す電池を製造す
る際の溶接中の状態を示す要部拡大断面図であ
る。
４……電池ケース、５……蓋、６……ボデイー
部、７……絶縁部。
FIG. 1 is a half-cut sectional view of a sealed battery manufactured according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of essential parts showing the state before welding starts when manufacturing the battery shown in FIG. 1. be. FIG. 3 is an enlarged sectional view of essential parts showing a state before welding is started when manufacturing a battery by a conventional method. FIG. 4 is an enlarged sectional view of a main part showing a state during welding when manufacturing the battery shown in FIG. 1. 4... Battery case, 5... Lid, 6... Body part, 7... Insulating part.
Claims (1)
６の内周側に位置しその外周面を上記ボデイー部
６の内周面に溶着したガラスよりなる絶縁部７を
有する蓋５のボデイー部６の外周部と、該ボデイ
ー部６より厚みの薄い電池ケース４の開口端部と
を溶接するにあたり、蓋５と電池ケース４とを電
池ケース４の開口部先端が蓋５のボデイー部６の
外周部上端より突出した状態に嵌合して溶接する
ことを特徴とする密閉形電池の製造法。1 A body part 6 of a lid 5 having an annular metal body part 6 and an insulating part 7 made of glass located on the inner peripheral side of the body part 6 and whose outer peripheral surface is welded to the inner peripheral surface of the body part 6. When welding the outer periphery of the battery case 4 to the open end of the battery case 4 which is thinner than the body part 6, the lid 5 and the battery case 4 are connected so that the opening end of the battery case 4 is connected to the outer periphery of the body part 6 of the lid 5. A method for manufacturing a sealed battery characterized by fitting and welding the battery so that the battery protrudes from the upper end of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57041923A JPS58158858A (en) | 1982-03-17 | 1982-03-17 | Manufacturing method for sealed type battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57041923A JPS58158858A (en) | 1982-03-17 | 1982-03-17 | Manufacturing method for sealed type battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58158858A JPS58158858A (en) | 1983-09-21 |
| JPH0524622B2 true JPH0524622B2 (en) | 1993-04-08 |
Family
ID=12621761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57041923A Granted JPS58158858A (en) | 1982-03-17 | 1982-03-17 | Manufacturing method for sealed type battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58158858A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100631057B1 (en) * | 2003-09-19 | 2006-10-04 | 한국 파워셀 주식회사 | Lithium ion secondary battery |
| JP5469522B2 (en) * | 2010-04-16 | 2014-04-16 | セイコーインスツル株式会社 | Electrochemical cell and method for producing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56107470A (en) * | 1980-01-30 | 1981-08-26 | Sanyo Electric Co Ltd | Battery |
-
1982
- 1982-03-17 JP JP57041923A patent/JPS58158858A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56107470A (en) * | 1980-01-30 | 1981-08-26 | Sanyo Electric Co Ltd | Battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58158858A (en) | 1983-09-21 |
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