JP2955135B2 - Positive electrode pin and lithium ion battery having the same - Google Patents
Positive electrode pin and lithium ion battery having the sameInfo
- Publication number
- JP2955135B2 JP2955135B2 JP4263606A JP26360692A JP2955135B2 JP 2955135 B2 JP2955135 B2 JP 2955135B2 JP 4263606 A JP4263606 A JP 4263606A JP 26360692 A JP26360692 A JP 26360692A JP 2955135 B2 JP2955135 B2 JP 2955135B2
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- electrode pin
- battery
- pin
- chemical conversion
- 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 - Fee Related
Links
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
Description
【０００１】[0001]
【産業上の利用分野】本発明は密閉型電池に関し、特に
電池の正極ピンおよびそれを有するリチウムイオン電池
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed battery, and more particularly to a positive electrode pin of a battery and a lithium ion battery having the same.
【０００２】[0002]
【従来の技術】最近、リチウム電池やリチウムイオン電
池等の電池が携帯用電子機器等に広く利用されつつあ
る。ところで、かかる電池系は従来の電池系と異なり、
３Ｖ、４Ｖといった高い起電力を有するという特徴があ
りその優れた性能が注目されてきている。2. Description of the Related Art Recently, batteries such as lithium batteries and lithium ion batteries have been widely used in portable electronic devices and the like. By the way, this battery system is different from the conventional battery system,
It is characterized by having a high electromotive force such as 3V and 4V, and its excellent performance has been attracting attention.
【０００３】しかしながら、かかる電池系に用いる正極
端子材料はその高い起電力の故に限定された金属材料し
か用いられなかった。かかる高電圧に耐える金属材料と
しては、チタン、特殊なＳＵＳ、金、白金といった貴金
属、アルミニウム等、極く限られたものしかなかった。
特に、高い密閉性の要求されるハーメチックシール方式
の電池の場合、その正極ピン材料は融着ガラスの熱膨脹
係数と近い値である必要性から更に限定され、チタン、
特殊なＳＵＳ材料しか用いることができなかった。However, as a positive electrode terminal material used in such a battery system, only a limited metal material has been used because of its high electromotive force. As a metal material that can withstand such a high voltage, there were only extremely limited materials such as titanium, special SUS, noble metals such as gold and platinum, and aluminum.
Particularly, in the case of a hermetic seal type battery requiring high hermeticity, the positive electrode pin material is further limited by the need to have a value close to the thermal expansion coefficient of the fused glass, and titanium,
Only special SUS materials could be used.
【０００４】チタン、特殊なＳＵＳ材料はいずれも高価
であるとともに、加工性、溶接性等に大きな難点があっ
た。[0004] Titanium and special SUS materials are both expensive and have great drawbacks in workability, weldability and the like.
【０００５】[0005]
【発明が解決しようとする課題】本発明はかかる従来の
問題点を解決せんとするものであり、特に、高電圧に耐
え安価で加工性の良いアルミニウム、もしくはアルミニ
ウム合金の特性に注目し、融着ガラスによらない絶縁方
式を考案することにより上記問題点のない新規な正極ピ
ンおよびそれを有するリチウムイオン電池を提供せんと
するものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. In particular, the present invention focuses on the characteristics of aluminum or aluminum alloy which can withstand high voltage and is inexpensive and has good workability. It is an object of the present invention to provide a novel positive electrode pin which does not have the above-mentioned problems and a lithium ion battery having the same by devising an insulating method which does not rely on glass.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
本発明は、ＡｌもしくはＡｌ合金からなる正極ピンであ
って、該正極ピンが表面化成処理された層を有し、かつ
該表面化成処理層に高分子絶縁体が含浸被覆された絶縁
層を介して電池缶もしくは電池蓋にカシメられているこ
とを特徴とする電池用正極ピンにすることにより、耐電
圧性に優れたＡｌもしくはＡｌ合金を正極ピン材料とし
て用いることが可能となり、３Ｖ以上の起電力を有する
電池の正極ピンとして安価で有用な材料を提供できるよ
うにしたものである。In order to solve the above-mentioned problems, the present invention provides a positive electrode pin made of Al or an Al alloy, wherein the positive electrode pin has a surface-treated layer, and Al or Al alloy with excellent withstand voltage by forming a battery positive electrode pin characterized by being caulked to a battery can or a battery lid via an insulating layer in which a layer is impregnated with a polymer insulator Can be used as a positive electrode pin material, and an inexpensive and useful material can be provided as a positive electrode pin of a battery having an electromotive force of 3 V or more.
【０００７】[0007]
【作用】本発明で用いる正極ピンはＡｌもしくはＡｌ合
金でなければならない。The positive electrode pin used in the present invention must be made of Al or Al alloy.
【０００８】上記の如く高起電力に耐える金属材料は、
極く限定されたものであり、価格、加工性を含めて考え
た場合、ＡｌもしくはＡｌ合金が最適の材料である。[0008] As described above, the metal material that can withstand high electromotive force is
The material is extremely limited, and when considering the price and workability, Al or an Al alloy is the most suitable material.
【０００９】ＡｌもしくはＡｌ合金を正極ピンとして用
いるためには負極端子となる電池缶もしくは電池蓋と電
気的に絶縁されていなければならない。In order to use Al or an Al alloy as a positive electrode pin, it must be electrically insulated from a battery can or a battery lid serving as a negative electrode terminal.
【００１０】かかる絶縁の方法として最も一般的なの
は、例えば、特開昭６１−２４８，３５６号公報、特開
昭６１−２６１，２４０号公報、特開昭６３−７６，９
５６号公報等にて開示されている前記のハーメチックシ
ール方式であるが、ＡｌもしくはＡｌ合金は融着ガラス
との熱膨脹係数との差が余りに大きく、この方式を採用
した場合にはその製造工程中にヒビ割れが発生し製品を
得ることができない。The most common insulation methods are described in, for example, JP-A-61-248,356, JP-A-61-261,240, and JP-A-63-76,9.
No. 56, etc., the hermetic sealing method described above, but the difference between the thermal expansion coefficient of Al or Al alloy and the fused glass is too large. Cracks occur on the surface, making it impossible to obtain a product.
【００１１】事実、本発明者等はＡｌもしくはＡｌ合金
をピン材として種々の条件にてガラスとの融着を試みた
が満足な製品を得ることができなかった。In fact, the present inventors have tried to fuse Al or Al alloy with glass under various conditions using Al or an Al alloy as a pin material, but could not obtain a satisfactory product.
【００１２】本発明者等は更にガラス絶縁に代え、種々
の絶縁体による絶縁を種々の金属について検討を行った
結果、意外にもＡｌもしくはＡｌ合金からなるピンに表
面化成処理を行った層に高分子絶縁体を含浸被覆した絶
縁層を介して電池缶もしくは電池蓋にカシメることによ
り、電気絶縁性に優れ気密性にも優れた正極ピンを得る
ことができることを見出した。The present inventors have further studied various metals for insulation using various insulators instead of glass insulation. As a result, surprisingly, a pin made of Al or an Al alloy was subjected to surface chemical conversion treatment. By caulking a battery can or a battery lid through an insulating layer impregnated and covered with a polymer insulator, it has been found that a positive electrode pin having excellent electrical insulation properties and excellent airtightness can be obtained.
【００１３】図１は、本発明で用いられる表面化成処理
されたピンの断面図を示し、１はＡｌもしくはＡｌ合金
よりなるピンであり、２は化成処理された表面層を示
す。化成処理の方法については特に限定されるものでは
ないが、陽極電解処理、化学的化成処理等の方法が採用
される。化成処理層の厚みについては特に限定されない
が、通常、１〜１５０μの範囲である。FIG. 1 is a cross-sectional view of a surface-treated pin used in the present invention, wherein 1 is a pin made of Al or an Al alloy, and 2 is a surface layer subjected to a chemical conversion treatment. The method of the chemical conversion treatment is not particularly limited, but a method such as anodic electrolytic treatment and chemical conversion treatment is employed. The thickness of the chemical conversion treatment layer is not particularly limited, but is usually in the range of 1 to 150 μm.
【００１４】図２は、化成処理層に高分子絶縁体が含浸
被覆されたピンと電池缶もしくは電池蓋を示す。１はＡ
ｌもしくはＡｌ合金よりなるピンであり、３は化成処理
層に高分子絶縁体が含浸被覆された絶縁層を示す。FIG. 2 shows a pin having a chemical conversion treatment layer impregnated with a polymer insulator and a battery can or a battery lid. 1 is A
Reference numeral 3 denotes an insulating layer in which a chemical conversion treatment layer is impregnated with a polymer insulator.
【００１５】該高分子絶縁体層は前記化成処理層に含浸
されただけの状態であってもよいし、該高分子絶縁体層
が前記化成処理層に含浸され、さらに被覆された状態の
いずれであってもよい。含浸の方法は特に限定されない
が、該高分子絶縁体の溶液を前記化成処理層に含浸させ
る方法、該高分子絶縁体をエマルジョン状態で含浸させ
る方法等が挙げられる。The polymer insulating layer may be in a state of being merely impregnated in the chemical conversion treatment layer, or may be in a state of being impregnated in the chemical conversion treatment layer and further coated. It may be. The method of impregnation is not particularly limited, and examples thereof include a method of impregnating the chemical conversion treatment layer with the solution of the polymer insulator and a method of impregnating the polymer insulator in an emulsion state.
【００１６】本発明の構造によれば、硬質アルマイト層
からなる絶縁層と、高分子絶縁体とからなる絶縁層の相
乗効果により極めて優れた絶縁効果が発揮される。According to the structure of the present invention, an extremely excellent insulating effect is exhibited by the synergistic effect of the insulating layer made of the hard alumite layer and the insulating layer made of the polymer insulator.
【００１７】用いられる高分子絶縁体については特に限
定されるものではないが、ポリエチレン、ポリプロピレ
ン、ポリテトラフロロエチレン、ポリフェニレンサルフ
ァイト、スチレンブタジエンゴム等の高分子絶縁体が一
例として挙げられる。The polymer insulator used is not particularly limited, but examples thereof include polymer insulators such as polyethylene, polypropylene, polytetrafluoroethylene, polyphenylene sulfite, and styrene-butadiene rubber.
【００１８】４は開口部を有する電池缶もしくは電池蓋
を示す。Reference numeral 4 denotes a battery can or a battery lid having an opening.
【００１９】１を４にカシメることにより本発明でいう
正極ピン構造を得ることができる。図３は、カシメられ
た正極ピン構造の側面を示す。By caulking 1 to 4, the positive electrode pin structure according to the present invention can be obtained. FIG. 3 shows a side view of the crimped positive electrode pin structure.
【００２０】[0020]
【実施例】以下、実施例により本発明を更に詳しく説明
する。The present invention will be described in more detail with reference to the following examples.
【００２１】実施例１ Ａｌ材（Ａ−５０５２）よりなる図１のピン１を陽極電
解処理により化成処理層２を厚さ５０μになるように形
成させた。次に該ピンにポリテトラフロロエチレンのエ
マルジョンを含浸被覆させて絶縁層３を形成させた。Example 1 A pin 1 of FIG. 1 made of an Al material (A-5052) was formed by anodic electrolytic treatment so that a chemical conversion treatment layer 2 was formed to a thickness of 50 μm. Next, the pin was impregnated and coated with an emulsion of polytetrafluoroethylene to form an insulating layer 3.
【００２２】この処理したピン図２、１を３５０ｋｇ／
ｃｍ2の圧力で電池蓋４にカシメることにより図３に示
す正極ピン構造を得た。The treated pins shown in FIGS.
The positive electrode pin structure shown in FIG. 3 was obtained by caulking the battery cover 4 at a pressure of 2 cm 2 .
【００２３】この正極ピンと電池蓋との間の絶縁抵抗及
び気密性を示すヘリウムリーク度は表１に示す通りであ
った。The insulation resistance between the positive electrode pin and the battery lid and the helium leak rate indicating the airtightness are as shown in Table 1.
【００２４】なお、ヘリウムリーク度は、ライボルト株
式会社製 ヘリウムディテクターＵＬ １００ ＰＬＵ
Ｓ を用いて測定した。The helium leak rate was measured using a helium detector UL 100 PLU manufactured by Rybold Co., Ltd.
It was measured using S 2.
【００２５】実施例２ 実施例１においてＡｌ材（Ａ−５０５２）の代わりにＡ
ｌ材（ＡＣ ７Ａ）を用いた以外は全く同じ操作を行っ
た。Example 2 In Example 1, A was used instead of the Al material (A-5052).
Except for using 1 material (AC 7A), the same operation was performed.
【００２６】この正極ピンと電池蓋との間の絶縁抵抗及
び気密性を示すヘリウムリーク度は表１に示す通りであ
った。The insulation resistance between the positive electrode pin and the battery lid and the helium leak rate indicating airtightness are as shown in Table 1.
【００２７】比較例１ 実施例１においてＡｌ材（Ａ−５０５２）の化成処理を
行わなかった以外は全く同じ操作を行った。Comparative Example 1 Except that the chemical conversion treatment of the Al material (A-5052) was not performed in Example 1, the same operation was performed.
【００２８】この正極ピンと電池蓋との間の絶縁抵抗及
び気密性を示すヘリウムリーク度は表１に示す通りであ
った。The insulation resistance between the positive electrode pin and the battery lid and the helium leak rate indicating airtightness are as shown in Table 1.
【００２９】比較例２ 実施例２においてポリテトラフロロエチレンの含浸処理
を行わない以外は全く同じ操作を行った。Comparative Example 2 The procedure of Example 2 was repeated except that the polytetrafluoroethylene was not impregnated.
【００３０】この正極ピンと電池蓋との間の絶縁抵抗及
び気密性を示すヘリウムリーク度は表１に示す通りであ
った。The insulation resistance between the positive electrode pin and the battery lid and the helium leak rate indicating airtightness were as shown in Table 1.
【００３１】[0031]
【表１】 [Table 1]
【００３２】[0032]
【発明の効果】上述のように本発明の電池用正極ピン構
造は電気絶縁性、気密性に優れかつ安価であり、電池用
部材として極めて有用である。As described above, the positive electrode pin structure for a battery according to the present invention is excellent in electric insulation, airtightness and inexpensive, and is extremely useful as a battery member.
【図１】化成処理されたピンの説明図。FIG. 1 is an explanatory view of a pin subjected to a chemical conversion treatment.
【図２】絶縁層を形成したピンと蓋との説明図。FIG. 2 is an explanatory view of a pin on which an insulating layer is formed and a lid.
【図３】ピンを蓋にカシメた状態の説明図。FIG. 3 is an explanatory view of a state where a pin is swaged on a lid.
１ ピン ２ 化成処理層 ３ 絶縁層 ４ 蓋 1 pin 2 chemical conversion treatment layer 3 insulating layer 4 lid
───────────────────────────────────────────────────── フロントページの続き (72)発明者 湊 康文 神奈川県川崎市川崎区夜光１丁目３番１ 号 旭化成工業株式会社内 (72)発明者 栗栖 憲仁 東京都品川区南品川３−４−10 東芝電 池株式会社内 (72)発明者 金綱 務 神奈川県横浜市緑区霧ケ丘３−22−14− 202 (56)参考文献 特開 平４−92360（ＪＰ，Ａ) 特開 平６−111803（ＪＰ，Ａ) 特開 昭61−13559（ＪＰ，Ａ) 実開 昭63−33564（ＪＰ，Ｕ) 実開 平３−8863（ＪＰ，Ｕ) 実開 昭57−125484（ＪＰ，Ｕ) 実開 昭58−60863（ＪＰ，Ｕ) 実開 平２−16560（ＪＰ，Ｕ) 実開 平３−10464（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H01M 2/30 H01M 10/40 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasufumi Minato 1-3-1, Yoko, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Asahi Kasei Kogyo Co., Ltd. (72) Inventor Norihito Kurisu 3-4-10, Minamishinagawa, Shinagawa-ku, Tokyo (72) Inventor Tsutomu Kinatsuna 3-22-14-202, Kirigaoka, Midori-ku, Yokohama-shi, Kanagawa Prefecture (56) References JP-A-4-92360 (JP, A) JP-A-6-111803 ( JP, A) JP-A-61-13559 (JP, A) JP-A-63-33564 (JP, U) JP-A-3-8863 (JP, U) JP-A-57-125484 (JP, U) 58-60863 (JP, U) Japanese Utility Model 2-16560 (JP, U) Japanese Utility Model 3-1064 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) H01M 2 / 30 H01M 10/40
Claims (2)
であって、該正極ピンが表面化成処理された層を有し、
かつ該表面化成処理層に高分子絶縁体が含浸被覆された
絶縁層を介して電池缶もしくは電池蓋にカシメられてい
ることを特徴する電池用正極ピン。1. A positive electrode pin made of Al or an Al alloy, the positive electrode pin having a surface-treated layer,
A positive electrode pin for a battery, wherein the positive electrode pin for a battery is caulked to a battery can or a battery cover via an insulating layer in which the surface chemical conversion treatment layer is impregnated with a polymer insulator.
するリチウムイオン電池。Lithium-ion battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4263606A JP2955135B2 (en) | 1992-10-01 | 1992-10-01 | Positive electrode pin and lithium ion battery having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4263606A JP2955135B2 (en) | 1992-10-01 | 1992-10-01 | Positive electrode pin and lithium ion battery having the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0750160A JPH0750160A (en) | 1995-02-21 |
| JP2955135B2 true JP2955135B2 (en) | 1999-10-04 |
Family
ID=17391882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4263606A Expired - Fee Related JP2955135B2 (en) | 1992-10-01 | 1992-10-01 | Positive electrode pin and lithium ion battery having the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2955135B2 (en) |
-
1992
- 1992-10-01 JP JP4263606A patent/JP2955135B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0750160A (en) | 1995-02-21 |
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