JPS63298958A - Square-shaped sealed battery - Google Patents
Square-shaped sealed batteryInfo
- Publication number
- JPS63298958A JPS63298958A JP62131539A JP13153987A JPS63298958A JP S63298958 A JPS63298958 A JP S63298958A JP 62131539 A JP62131539 A JP 62131539A JP 13153987 A JP13153987 A JP 13153987A JP S63298958 A JPS63298958 A JP S63298958A
- Authority
- JP
- Japan
- Prior art keywords
- case
- thickness
- plate
- battery
- cover plate
- 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 21
- 239000002184 metal Substances 0.000 claims abstract description 18
- 238000010248 power generation Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 10
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 abstract 1
- 239000000806 elastomer Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003466 welding 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- 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
- H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は封口構造を改良した角形密閉電池に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a prismatic sealed battery with an improved sealed structure.
角形密閉電池、特に小形携帯用の角形密閉電池は、従来
角筒状金属ケース１１の開口部１９に絶縁ガスケット１
５を介して封口蓋板１４を挿入した後、金属ケース開口
端１９を板厚の１０倍の半径程度の比較的大きな曲率で
、内方に約２０度〜５０度の角度折υ曲げて密閉してい
た。Conventionally, a square sealed battery, especially a small portable square sealed battery, has an insulating gasket 1 in an opening 19 of a square cylindrical metal case 11.
After inserting the sealing lid plate 14 through the metal case 5, the open end 19 of the metal case is bent inward at an angle of about 20 to 50 degrees with a relatively large radius of about 10 times the thickness of the plate to seal it. Was.
しかし、このような場合通常の使用条件下においては密
閉性に問題はないが、高温状態に長期間放置した際や、
充電可能な二次電池については過充電された際に、ガス
発生により電池内圧が上昇し、角形電池では封口部断面
が楕円状に外方に変形し易いため、密閉性が低下する問
題があった。However, in such cases, there is no problem with sealing under normal usage conditions, but when left in high temperature conditions for a long period of time,
When rechargeable secondary batteries are overcharged, the internal pressure of the battery increases due to gas generation, and in prismatic batteries, the cross section of the sealing section tends to deform outward into an elliptical shape, resulting in a reduction in sealing performance. Ta.
従って、この対策として金属ケース１１の板厚を厚くし
て封口強度を高める試みもなされているが、この場合は
板厚増加分だけ内部に充填する活物質の量を減らさねば
ならなくなるため、容量低下の問題があった。Therefore, as a countermeasure to this problem, attempts have been made to increase the sealing strength by increasing the thickness of the metal case 11, but in this case, the amount of active material filled inside must be reduced by the increased thickness, which increases the capacity. There was a problem with decline.
本発明は上記欠点を除去し、如何なる条件下においても
密閉性が良い角形電池を提供するものである。The present invention eliminates the above-mentioned drawbacks and provides a prismatic battery that has good sealing properties under any conditions.
本発明は発電要素を内填した角筒状金属ケースの開口端
を内方に折曲して密閉する角形電池において、ケース開
口端を金属ケースの板厚の１〜７倍の半径の曲率で、（
３）度〜１３５度の角度折シ曲げることを特徴としてい
る。The present invention relates to a prismatic battery in which the open end of a prismatic cylindrical metal case containing a power generation element is bent inward to seal the case, and the open end of the case is formed with a radius of curvature of 1 to 7 times the thickness of the metal case. ,(
3) It is characterized by bending at an angle of 135 degrees to 135 degrees.
上記のように本発明はケース開口端を金属ケースの板厚
の１〜７倍の半径の曲率で（資）度〜１３５度の範囲に
折り曲げることで、封口部分のケース曲げ強度を増すこ
とができるため、電池内圧が上昇した際にも、封口部分
のケースが外方へ楕円状に拡がることを抑えることがで
きるので密閉性が向上するとともに、ケース板厚も厚く
する必要がないので容量低下を防ぐことができる。As described above, the present invention can increase the case bending strength of the sealed portion by bending the case opening end with a radius of curvature that is 1 to 7 times the thickness of the metal case in a range of 135 degrees. As a result, even when the internal pressure of the battery increases, the sealing part of the case can be prevented from expanding outward in an elliptical shape, improving sealing performance, and there is no need to increase the thickness of the case plate, reducing capacity. can be prevented.
以下、図面に従い本発明の一実施例を説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図において、１は金属製平板を絞シ加工または溶接
法によって有底角筒状く形成した板厚Ｑ、４１４ｉ＋の
金属ケースである。この金属ケースｌ内に１正極板６と
負極板７とをセパレータ８を介して両端に負極板７が露
出するように重ね合せた極板群を納める。そして、正極
板６及び負極板７よシ夫々導出した集電リード６ａ、７
ａを、絶縁ガスケット５内に載置した蓋板４と金属ケー
ス１とに、夫々接続する。次いで絶縁ガスケット５と蓋
板４よりなる封口体と゛をケース１の開口端９に挿入し
、第３図の封口部拡大図のようにケース１の開口端９を
ケース板厚の２．５倍である半径１．０順の曲率孔で、
９０度の角度θで内方に折シ曲げることによシ、絶縁ガ
スケット５を介して蓋板４を固定する。そして、弾性体
３を内装した正極端子板２を蓋板４にスポット溶接して
、角形電池を完成させる。In FIG. 1, reference numeral 1 denotes a metal case having a plate thickness Q of 414i+, which is formed from a flat metal plate into a rectangular tube shape with a bottom by drawing or welding. This metal case 1 houses an electrode plate group in which one positive electrode plate 6 and one negative electrode plate 7 are stacked one on top of the other with a separator 8 in between so that the negative electrode plate 7 is exposed at both ends. Then, current collector leads 6a and 7 are led out from the positive electrode plate 6 and the negative electrode plate 7, respectively.
a are connected to the lid plate 4 placed inside the insulating gasket 5 and the metal case 1, respectively. Next, a sealing body consisting of an insulating gasket 5 and a cover plate 4 is inserted into the open end 9 of the case 1, and the open end 9 of the case 1 is 2.5 times the thickness of the case plate as shown in the enlarged view of the sealing part in FIG. In a hole with a radius of 1.0,
The cover plate 4 is fixed via the insulating gasket 5 by bending it inward at an angle θ of 90 degrees. Then, the positive terminal plate 2 containing the elastic body 3 is spot welded to the cover plate 4 to complete the prismatic battery.
ちなみに、板厚０．４Ｈの金属ケースの開口端をケース
板厚の１倍、２．５倍、７倍、８倍の半径の曲率孔で、
９０度折９曲げた角形電池Ａ、 Ｂ、 Ｃ，Ｄ を夫々
製造し、温度６０℃、相対湿度９０％中に１ケ月貯蔵し
、１００個中の漏液発生電池個数を調べたところ、第１
表の結果が得られた。By the way, the opening end of a metal case with a plate thickness of 0.4H is made with curvature holes with radii of 1, 2.5, 7, and 8 times the case plate thickness.
Rectangular batteries A, B, C, and D each bent 90 degrees were manufactured and stored for one month at a temperature of 60°C and a relative humidity of 90%, and the number of leaking batteries out of 100 was investigated. 1
The results in the table were obtained.
第１表
さらに、同じ金属ケースの開口端を半径の２．５倍の曲
率で、４５度、（社）度、１３５度、１６０度の角度θ
で折シ曲げた角形電池Ｅ％Ｆ、Ｇ、Ｈを夫々製造し、上
記と同条件で漏液発生電池個数を調べ、第２表の結果が
得られた。Table 1 further shows that the opening end of the same metal case has a curvature of 2.5 times the radius, and the angles θ are 45 degrees, 135 degrees, and 160 degrees.
Rectangular batteries E%F, G, and H bent by bending were manufactured respectively, and the number of batteries leaking was examined under the same conditions as above, and the results shown in Table 2 were obtained.
第２表
第１．２表により、本発明電池人、Ｂ、 Ｃ，Ｆ、 Ｇ
は漏液が完全に防止されていることが判った。これは本
発明の範囲外電池り、 Ｅ、 Ｈは、ガス発生によシミ
池内圧が上昇した際、電池封口部のケースが外側に変形
し、密閉性が低下してしまうからである。これに比べて
、本発明電池はケース封口部の折シ曲げが、金属ケース
の板厚の１〜７倍の半径の曲率Ｒで、しかも（ト）度〜
１３５度の角度６の範囲内に曲げられているため、ケー
ス強度が高ｔｂ、変形による密閉性の低下が全く生じな
いので、耐漏液性が優れている。According to Table 2, Table 1.2, the battery of the present invention, B, C, F, G
It was found that leakage was completely prevented. This is because for batteries E and H that are outside the scope of the present invention, when the internal pressure of the stain pond increases due to gas generation, the case of the battery sealing portion deforms outward, resulting in a decrease in sealing performance. In comparison, in the battery of the present invention, the case sealing part is bent with a radius R of 1 to 7 times the thickness of the metal case, and
Since the case is bent within an angle 6 of 135 degrees, the case strength is high tb, and there is no deterioration in sealing performance due to deformation, so leakage resistance is excellent.
本発明によれば、ケース開口端を金属ケースの板厚の１
〜７倍の半径の曲率で、（社）度〜１３５度の範囲に折
シ曲げることで、封口部分のケース曲げ強度が高まシ、
電池内圧が上昇した際にも、封口部分のケースが外方に
楕円状に拡がることを抑えることができるので、密閉性
が向上する。従って、安全弁作動圧を高く設定で゛きる
ため、ケース変形を抑えるために安全弁作動圧を低く設
定すると生ずる作動時の電解液の消耗を防止でき、さら
にケース板厚を薄くすることにょ静容量を増加すること
ができる。According to the present invention, the opening end of the case is set to 1 part of the thickness of the metal case.
By bending the case in the range of ~135 degrees with a radius of ~7 times, the bending strength of the case at the sealing part is increased.
Even when the internal pressure of the battery increases, it is possible to prevent the sealed portion of the case from expanding outward in an elliptical shape, thereby improving sealing performance. Therefore, since the safety valve operating pressure can be set high, it is possible to prevent the electrolyte from being consumed during operation, which occurs when the safety valve operating pressure is set low to suppress case deformation, and further, by reducing the thickness of the case plate, the capacitance can be reduced. can be increased.
第１図は本発明の一実施例における角形密閉電池の断面
図、第２図は従来の同形電池の断面図である。第３図は
封口部の拡大断面図である。FIG. 1 is a sectional view of a prismatic sealed battery according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional same-shaped battery. FIG. 3 is an enlarged sectional view of the sealing part.
Claims (1)
ケットを介して封口蓋板を挿入した後、金属ケース開口
端を内方に折曲して密閉する角形電池において、ケース
開口端を金属ケースの板厚の１〜７倍の半径の曲率で、
９０度〜１３５度の範囲の角度折り曲げていることを特
徴とする角形密閉電池。In a prismatic battery, a sealing cover plate is inserted into the opening of a prismatic cylindrical metal case containing a power generation element via an insulating gasket, and then the opening end of the metal case is bent inward to seal it. With a radius of curvature that is 1 to 7 times the thickness of the case,
A square sealed battery characterized by being bent at an angle in the range of 90 degrees to 135 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62131539A JPS63298958A (en) | 1987-05-29 | 1987-05-29 | Square-shaped sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62131539A JPS63298958A (en) | 1987-05-29 | 1987-05-29 | Square-shaped sealed battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63298958A true JPS63298958A (en) | 1988-12-06 |
Family
ID=15060444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62131539A Pending JPS63298958A (en) | 1987-05-29 | 1987-05-29 | Square-shaped sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63298958A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008139748A1 (en) * | 2007-05-15 | 2008-11-20 | Panasonic Corporation | Aa cell battery |
| EP2122712A1 (en) * | 2006-12-11 | 2009-11-25 | LG Chem, Ltd. | Lithium ion battery of crimping shape of increased safety |
-
1987
- 1987-05-29 JP JP62131539A patent/JPS63298958A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2122712A1 (en) * | 2006-12-11 | 2009-11-25 | LG Chem, Ltd. | Lithium ion battery of crimping shape of increased safety |
| EP2122712A4 (en) * | 2006-12-11 | 2010-01-27 | Lg Chemical Ltd | Lithium ion battery of crimping shape of increased safety |
| US8889288B2 (en) | 2006-12-11 | 2014-11-18 | Lg Chem, Ltd. | Lithium ion battery of crimping shape of increased safety |
| US9130203B2 (en) | 2006-12-11 | 2015-09-08 | Lg Chem, Ltd. | Lithium ion battery of crimping shape of increased safety |
| WO2008139748A1 (en) * | 2007-05-15 | 2008-11-20 | Panasonic Corporation | Aa cell battery |
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