JPH03122964A - Sealed battery - Google Patents
Sealed batteryInfo
- Publication number
- JPH03122964A JPH03122964A JP1259700A JP25970089A JPH03122964A JP H03122964 A JPH03122964 A JP H03122964A JP 1259700 A JP1259700 A JP 1259700A JP 25970089 A JP25970089 A JP 25970089A JP H03122964 A JPH03122964 A JP H03122964A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- battery container
- sealing lid
- sealed
- container
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000003466 welding Methods 0.000 claims abstract description 9
- 229910000975 Carbon steel Inorganic materials 0.000 claims 1
- 239000010962 carbon steel Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052799 carbon Inorganic materials 0.000 abstract description 12
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract description 5
- 239000003792 electrolyte Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 238000005275 alloying Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
【発明の詳細な説明】
主業上皇科里分団
本発明は密閉形電池に関し、特に気密性の向上を図りう
る密閉形電池に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed battery, and more particularly to a sealed battery that can improve airtightness.
災来夏技五
近年、電子機器の小型化、薄型化に伴って長期の信頼性
に優れた電池が要望されるようになり、電池の密閉方法
にも改良が加えられている。例えば、小型の角形密閉電
池の場合には、容積効率を低下させることなく過充電時
や過放電時等に発生するガス圧に耐えるべく、金属製の
電池容器に封口蓋を嵌着し、その接合部をレーザー溶接
により密封するような構造が一般的に採用されている。In recent years, as electronic devices have become smaller and thinner, there has been a demand for batteries with excellent long-term reliability, and improvements have been made to the sealing methods for batteries. For example, in the case of a small prismatic sealed battery, a sealing lid is fitted onto the metal battery container in order to withstand the gas pressure generated during overcharging or overdischarging without reducing volumetric efficiency. A structure in which the joints are sealed by laser welding is generally adopted.
上記電池における電池容器と封口蓋との嵌着方法として
は、レーザー溶接に対応すべく、以下に示すような・も
のが′知られている。As a method for fitting the battery container and the sealing lid in the above-mentioned battery, the following methods are known in order to be compatible with laser welding.
■発電要素を収納した電池容器の開口端に、周縁が平板
状の封口蓋を嵌着させる方法。■A method in which a sealing lid with a flat peripheral edge is fitted onto the open end of a battery container containing a power generation element.
■特開昭５６−１０７４７０号公報に示すように、封口
蓋の周縁に立上り部を設け、円筒形あるいは角形の電池
容器の開口端内縁に接するように嵌着させる方法。(2) As shown in Japanese Patent Application Laid-Open No. 56-107470, a method in which a rising portion is provided on the periphery of the sealing lid and the lid is fitted so as to be in contact with the inner edge of the opening end of a cylindrical or square battery container.
（シよ°と る１
ところで、上記密閉形電池において、電池容器と封口蓋
との構成材としては一般に鉄材が用いられている。とこ
ろが、この鉄材にはカーボンが０゜０５〜０．８％含ま
れているため、鉄とカーボンとの熱膨張係数、融点、融
解熱などの物性の差に起因して、レーザー溶接時に溶融
部付近において反りやねじれを含む熱的変形や歪みを生
じる。この歪み等はカーボン量が多くなるほど顕著に生
じる傾向がある。加えて、溶接部では、溶融時にカーボ
ンが不純物として鉄中に拡散するが、レーザ溶接におけ
る溶融から冷却までの時間は非常に短時間であるため、
溶接部の組成、結晶状態が不均一となって内部の歪みが
大きくなり易い。(By the way, in the above-mentioned sealed battery, iron material is generally used as the constituent material of the battery container and the sealing lid. However, this iron material contains 0.05 to 0.8% carbon. Due to the difference in physical properties such as thermal expansion coefficient, melting point, and heat of fusion between iron and carbon, thermal deformation and distortion including warping and twisting occur near the fusion zone during laser welding. Distortion, etc. tends to occur more noticeably as the amount of carbon increases.In addition, carbon diffuses into the iron as an impurity during melting in welded parts, but the time from melting to cooling in laser welding is extremely short. Because there is
The composition and crystalline state of the weld zone become non-uniform, and internal distortion tends to increase.
これらのことから、溶接部でピンホールやクラック等が
生じて、電解液が漏出するという課題を有していた。For these reasons, there was a problem in that pinholes, cracks, etc. were generated in the welded portion, and the electrolyte leaked out.
本発明は上記課題を考慮して、溶接時の歪みに起因する
ピンホールやクラックの発生を抑制して電池電解液の漏
液を防止することができる密閉形電池の提供を目的とし
ている。In view of the above-mentioned problems, the present invention aims to provide a sealed battery that can suppress the occurrence of pinholes and cracks caused by distortion during welding and prevent leakage of battery electrolyte.
ｍ るための
本発明は上記目的を達成するために、発電要素が収納さ
れた電池容器とこの電池容器の開口端に嵌着された封口
蓋との接合部がレーザー溶接により密封された密閉形電
池において、前記電池容器と封口蓋とが低炭素鋼材から
成ることを特徴とする。In order to achieve the above-mentioned object, the present invention provides a closed type battery in which a joint part between a battery container in which a power generating element is housed and a sealing lid fitted to an open end of the battery container is sealed by laser welding. The battery is characterized in that the battery container and the sealing lid are made of low carbon steel.
昨−一一一町
上記の如く電池容器と封口蓋とが低炭素鋼材から構成さ
れていれば、カーボン含有量の少ないので、レーザー溶
接時に熔融に起因する歪が小さくなると共に突沸等を生
じない。したがって、溶融部の合金形−成がス′ムーズ
に行われ、冷却時に溶融部の組成や結晶形態が均一とな
り、且つニッケルと鉄との熱膨張計数や融点融解熱等の
差異に起因する歪みを抑制することができる。これによ
り、溶接部におけるピンホールやクランクの発生率を極
めて低減することが可能となる。If the battery container and the sealing lid are made of low-carbon steel as described above, the carbon content will be low, so distortion caused by melting during laser welding will be small and bumping will not occur. . Therefore, alloy formation in the molten zone occurs smoothly, the composition and crystal morphology of the molten zone become uniform during cooling, and distortion caused by the difference in thermal expansion coefficient, melting point, heat of fusion, etc. between nickel and iron is prevented. can be suppressed. This makes it possible to extremely reduce the incidence of pinholes and cranks in the weld.
実−嵐一桝
本発明の一実施例を、第１図〜第３図に基づし１て、以
下に説明する。第１図は本発明の密閉形電池の部分断面
図であり、第２図は第１図の要部断面図である。One embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a partial sectional view of the sealed battery of the present invention, and FIG. 2 is a sectional view of the main part of FIG. 1.
第１図に示すように、本発明の密閉形電池は内部に発電
要素ｌが収納された有底円筒状の電池容器２を有してい
る。この電池容器２の開口端には平板状の封口蓋３が嵌
着されており、且つ電池容器２と封口蓋３との接合部は
レーザー溶接されて電池内が密封される。上記封口蓋３
の中心には透孔３ｃが形成されており、この透孔３ｃの
上下面にはバッキング４と絶縁板５とが配置されている
。As shown in FIG. 1, the sealed battery of the present invention has a bottomed cylindrical battery container 2 in which a power generating element 1 is housed. A flat sealing lid 3 is fitted to the open end of the battery container 2, and the joint between the battery container 2 and the sealing lid 3 is laser welded to seal the inside of the battery. The above sealing lid 3
A through hole 3c is formed in the center of the through hole 3c, and a backing 4 and an insulating plate 5 are arranged on the upper and lower surfaces of this through hole 3c.
上記封口蓋３とバッキング４と絶縁板５とは前記透孔３
Ｃに挿通された封口部材６により挟持されており、封口
部材６上には内部にゴム弁板７が設けられた陽極キャッ
プ８が固定されている。The sealing lid 3, the backing 4, and the insulating plate 5 are connected to the through hole 3.
The anode cap 8 is held by a sealing member 6 inserted through the anode cap 6, and an anode cap 8 having a rubber valve plate 7 provided therein is fixed onto the sealing member 6.
ここで、第２図に示すように、上記電池容器２と封口Ｍ
３とはカーボン含有量が０．００５％以下の低炭素鋼板
を所定の形状に成型して本体部２ａ・３ａを作製した後
、これら本体部２ａ・３ａの表面にニッケルメッキ層２
ｂ・３ｂを形成することにより製作した。Here, as shown in FIG. 2, the battery container 2 and the sealing M
3 is a low carbon steel plate with a carbon content of 0.005% or less that is molded into a predetermined shape to produce the main body parts 2a and 3a, and then a nickel plating layer 2 is applied to the surfaces of these main body parts 2a and 3a.
It was manufactured by forming b.3b.
上記の構成において、密閉形電池を作製する場合には、
先ず電池容器２に発電要素１を収納する。In the above configuration, when producing a sealed battery,
First, the power generation element 1 is housed in the battery container 2.
次に、封口蓋３に絶縁板５を介して陽極端子部を形成し
た後、電池容器２の開口縁に封口蓋３を嵌着す、る。次
いで、第２図に示すように、電池容器２と封口蓋３との
接合部の上方からＹＡＧレーザー装置等を用いてレーザ
ー光Ａを照射する。これにより、接合部の上部が溶着し
て溶融部１０が形成され電池容器２と封口蓋３とが一体
化するので、電池を密閉することができる。Next, after forming an anode terminal portion on the sealing lid 3 via the insulating plate 5, the sealing lid 3 is fitted onto the opening edge of the battery container 2. Next, as shown in FIG. 2, laser light A is irradiated from above the joint between the battery container 2 and the sealing lid 3 using a YAG laser device or the like. As a result, the upper part of the joint part is welded to form a fused part 10, and the battery container 2 and the sealing lid 3 are integrated, so that the battery can be sealed.
電池容器−２と封口Ｍ３とのカーボン含有量を種々変化
させて、レーザ溶融部のクランク発生率を調べたので、
その結果を第３図に示す。尚、この場合のレーザー条件
は以下の通りである。By varying the carbon content of the battery container-2 and the sealing port M3, we investigated the crank occurrence rate of the laser-fused part.
The results are shown in FIG. Note that the laser conditions in this case are as follows.
（レーザー条件）
パルス幅：ｌ、４ｍｓ
電圧 ： ４４０Ｖ
重なり （ＲＥＰ−ＲＡＴＥ）：３２ＰＰＳスピード：
５ｍｍ／ｓ
不活性ガス（Ｎ２）吹き付は圧： Ｑ 、５ｋｇ／ ｃ
ｄ第３図より明らかなように、Ｆｅ鋼板のカーボン含有
量が０．００５％以下であればレーザー溶融部における
クランク発生率が非常に低（なることが認められる。こ
れに対して、Ｆｅ鋼板のカーボン含有量が０．００５％
を超えるとレーザー溶融部におけるクランク発生率が急
激に高くなることが４゜
認められる。したがって、Ｆｅ鋼板のカーボン含有量は
０．００５％以下であることが望ましい。尚、レーザー
条件を変えて行った場合にも、上記と同様の傾向がある
ことを実験により確認している。(Laser conditions) Pulse width: l, 4ms Voltage: 440V Overlap (REP-RATE): 32PPS Speed:
5mm/s Inert gas (N2) spraying pressure: Q, 5kg/c
d As is clear from Fig. 3, if the carbon content of the Fe steel plate is 0.005% or less, the crank occurrence rate in the laser-fused zone is extremely low. Carbon content is 0.005%
It is recognized that when the temperature exceeds 4°, the crank occurrence rate in the laser melted zone increases rapidly. Therefore, it is desirable that the carbon content of the Fe steel plate is 0.005% or less. It has been experimentally confirmed that the same tendency as above exists even when the laser conditions are changed.
主肌災肱果
以上説明したように本発明によれば、溶接部におけるピ
ンホールやクランクの発生率を極めて低減することがで
きるので、電解液の漏出を抑制でき、密閉形電池の長期
信頼性を極めて向上させることができる等の効果を奏す
る。As explained above, according to the present invention, the incidence of pinholes and cranks in welds can be extremely reduced, thereby suppressing electrolyte leakage and improving the long-term reliability of sealed batteries. This has the effect of significantly improving the
第１図は本発明の密閉形電池の部分断面図、第２図は第
１図の要部断面図、第３図はＦｅ鋼板のカーボン含有量
とクラック発生率との関係を示すグラフである。
１・・・発電要素、２・・・電池容器、３・・・封口蓋
。FIG. 1 is a partial sectional view of the sealed battery of the present invention, FIG. 2 is a sectional view of the main part of FIG. 1, and FIG. 3 is a graph showing the relationship between carbon content and crack occurrence rate of Fe steel plate. . 1... Power generation element, 2... Battery container, 3... Sealing lid.
Claims (1)
開口端に嵌着された封口蓋との接合部がレーザー溶接に
より密封された密閉形電池において、前記電池容器と封
口蓋とが低炭素鋼材から成ることを特徴とする密閉形電
池。(1) In a sealed battery in which the joint between a battery container housing a power generating element and a sealing lid fitted to the open end of the battery container is sealed by laser welding, the battery container and the sealing lid have a low temperature. A sealed battery characterized by being made of carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1259700A JPH03122964A (en) | 1989-10-03 | 1989-10-03 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1259700A JPH03122964A (en) | 1989-10-03 | 1989-10-03 | Sealed battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03122964A true JPH03122964A (en) | 1991-05-24 |
Family
ID=17337715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1259700A Pending JPH03122964A (en) | 1989-10-03 | 1989-10-03 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03122964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1580778A1 (en) * | 2004-03-23 | 2005-09-28 | Sanyo Electric Co., Ltd. | Electric double layer capacitor and electrolyte battery |
-
1989
- 1989-10-03 JP JP1259700A patent/JPH03122964A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1580778A1 (en) * | 2004-03-23 | 2005-09-28 | Sanyo Electric Co., Ltd. | Electric double layer capacitor and electrolyte battery |
| US7054138B2 (en) | 2004-03-23 | 2006-05-30 | Sanyo Electric Co., Ltd. | Electric double layer capacitor and electrolyte battery |
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