JPH04167351A - Sealed battery - Google Patents
Sealed batteryInfo
- Publication number
- JPH04167351A JPH04167351A JP2293051A JP29305190A JPH04167351A JP H04167351 A JPH04167351 A JP H04167351A JP 2293051 A JP2293051 A JP 2293051A JP 29305190 A JP29305190 A JP 29305190A JP H04167351 A JPH04167351 A JP H04167351A
- Authority
- JP
- Japan
- Prior art keywords
- sealing member
- battery
- sealing
- sealed
- positive electrode
- 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
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 239000003822 epoxy resin Substances 0.000 claims abstract description 7
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 7
- 239000003792 electrolyte Substances 0.000 claims abstract 2
- 239000003566 sealing material Substances 0.000 claims description 14
- 238000010248 power generation Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 8
- 239000007774 positive electrode material Substances 0.000 abstract description 6
- 239000007784 solid electrolyte Substances 0.000 abstract description 6
- 239000012943 hotmelt Substances 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 229920005672 polyolefin resin Polymers 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 229920002627 poly(phosphazenes) Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000007650 screen-printing 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】 〔産業上の利用分野〕 本発明は密閉型電池の構造に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of a sealed battery.
近年、電池の軽薄短小化の要求に応えるものとしてシー
ト状電池が開発され、ＩＣカードなどの電源として使用
されている。このシート状電池は一般に発電要素を金属
シートで被覆し、その封止部は発電要素周縁部に変性ポ
リエチレンなどのポリオレフィン系樹脂接着剤により接
着、絶縁した構造となっている。In recent years, sheet batteries have been developed to meet the demand for lighter, thinner, and smaller batteries, and are used as power sources for IC cards and the like. This sheet-shaped battery generally has a structure in which a power generation element is covered with a metal sheet, and the sealed portion is bonded and insulated to the peripheral edge of the power generation element with a polyolefin resin adhesive such as modified polyethylene.
上記のような従来構造の封止部は、ポリオレフィン系樹
脂接着剤が直接発電要素に接触しているため、封止部の
剥離強度が十分に得られない。ポリオレフィン系樹脂の
欠点でもある経時劣化に伴い、樹脂と金属シート間の界
面剥離が起こりやすくなる。従って、負極にリチウムな
どのアルカリ金属を用いた場合の長期信転性、安全性の
面で問題となっている。In the conventionally structured sealing part as described above, the polyolefin resin adhesive is in direct contact with the power generation element, so that the sealing part does not have sufficient peel strength. With aging deterioration, which is a drawback of polyolefin resins, interfacial peeling between the resin and metal sheet tends to occur. Therefore, problems arise in terms of long-term reliability and safety when an alkali metal such as lithium is used for the negative electrode.
以上の課題を解決するために、本発明は、発電要素を封
入した密閉容器の封止部に電池内側封止材と電池外側封
止材とを有し、その両者間にエポキシ樹脂接着剤が充填
されていることを特徴とするものである。In order to solve the above problems, the present invention has a battery inner sealing material and a battery outer sealing material in the sealing part of a sealed container in which a power generation element is enclosed, and an epoxy resin adhesive is provided between the two. It is characterized by being filled.
本発明の密閉型電池の封止構造は、封止部の接着強度を
増大して密閉効果を向上させるとともに、電池の長期信
韻性および安全性を高めるように作用する。従って、負
極にリチウムなどのアルカリ金属を用いた電池において
、安全上のメリットが大きい。The sealing structure of the sealed battery of the present invention works to increase the adhesive strength of the sealing part to improve the sealing effect and to enhance the long-term reliability and safety of the battery. Therefore, in a battery using an alkali metal such as lithium for the negative electrode, there are great safety advantages.
本発明の一実施例を説明する。第１図は本発明密閉型電
池を実施した扁平形電池の断面図である。An embodiment of the present invention will be described. FIG. 1 is a sectional view of a flat battery in which the sealed battery of the present invention is implemented.
１ａは正極用集電体シートで密閉容器の一部を兼ねたも
のであり、厚さ約２０μｌのＳＵＳ箔からなっている。1a is a current collector sheet for the positive electrode, which also serves as a part of the sealed container, and is made of SUS foil with a thickness of about 20 μl.
２は正極活物質で、五酸化バナジウム水溶液（ゲルまた
はゾル状）を正極用集電体シート１ａ表面に、スクリー
ン印刷などの方法により塗布した後に乾燥させたキセロ
ゲルである。３はポリフォスフアゼン誘導体などの高分
子固体電解質であり、正極用集電体シート１ａの表面に
形成された正極活物質２の表面に塗布したものである。2 is a positive electrode active material, which is a xerogel obtained by applying a vanadium pentoxide aqueous solution (gel or sol) onto the surface of the positive electrode current collector sheet 1a by a method such as screen printing, and then drying it. 3 is a polymer solid electrolyte such as a polyphosphazene derivative, which is applied to the surface of the positive electrode active material 2 formed on the surface of the positive electrode current collector sheet 1a.
４は負極活物質でリチウムシートであり、高分子固体電
解質３表面にはりつけたものである。4 is a negative electrode active material, which is a lithium sheet, which is attached to the surface of the polymer solid electrolyte 3.
１ｂは負極用集電体シートで密閉容器の一部を兼ねたも
のであり、厚さ約２０μｍのＳＵＳ箔からなっている。Reference numeral 1b denotes a current collector sheet for the negative electrode, which also serves as a part of the airtight container, and is made of SUS foil with a thickness of about 20 μm.
５ａは電池内側封止材でフィルム状のホットメルト変性
ポリエチレンからなり、発電要素外周縁部に位置する様
に、予め正極用集電体シート１ａに熱溶着しておく。そ
うすることにより、正極活物質２および高分子固体電解
質３を塗布する際の塗布面積を規制し、かつ塗布時の正
極活物質２および高分子固体電解質３の流出やにじみを
防止する関の役目を果たす。５ｂは電池外側封止材でフ
ィルム状のホットメルト変性ポリエチレンから成るが、
電池最外周縁部に電池内側封止材５ａとは接触しない様
に予め正極集電体シート１ａに熱溶着しておく。６はエ
ポキシ樹脂で電池内側封止材５ａと電池外側封止材５ｂ
との間に充填されている。最終的に正極用集電体シー）
１ａと負極用集電体シー）１ｂとは、電池内側封止材５
ａ、電池外側封止材５ｂを加熱し、エポキシ樹脂６を硬
化させて接着、封止、絶縁されている。Reference numeral 5a denotes a battery inner sealing material made of a film-like hot-melt modified polyethylene, which is heat-welded in advance to the positive electrode current collector sheet 1a so as to be located at the outer periphery of the power generating element. By doing so, the role of the barrier is to regulate the coating area when applying the positive electrode active material 2 and the polymer solid electrolyte 3, and to prevent the positive electrode active material 2 and the polymer solid electrolyte 3 from leaking or bleeding during application. fulfill. 5b is the battery outer sealing material, which is made of a film-like hot-melt modified polyethylene.
The outermost edge of the battery is heat-welded to the positive electrode current collector sheet 1a in advance so as not to come into contact with the battery inner sealing material 5a. 6 is an epoxy resin, which is a battery inner sealing material 5a and a battery outer sealing material 5b.
It is filled between. Finally, the current collector sheet for the positive electrode)
1a and negative electrode current collector sheet) 1b are battery inner sealing material 5.
a, the battery outer sealing material 5b is heated and the epoxy resin 6 is cured for adhesion, sealing, and insulation.
このようにして得られた本発明密閉型電池の封止部と、
従来のようなポリオレフィン系接着剤を用いた電池の封
止部の剥離強度を経時変化で比較してみると、第２図の
ようになる。本発明品は、従来品の約１０倍の剥離強度
を示し、その経時変化も認められない。The sealed portion of the sealed battery of the present invention thus obtained,
Figure 2 shows a comparison of the peel strength of the sealed portion of a battery using a conventional polyolefin adhesive over time. The product of the present invention exhibits a peel strength approximately 10 times that of the conventional product, and no change in peel strength over time is observed.
尚、電池内側封止材５ａとしては、上記ホットメルト変
性ポリエチレンの地熱可塑性樹脂フィルムを用いても十
分効果があった。It should be noted that as the battery inner sealing material 5a, a geothermal plastic resin film made of the above-mentioned hot-melt modified polyethylene was used with sufficient effect.
上述のように、本発明によれば封止部の構造が頑丈、強
固なものとなり、密閉効果を向上すると共に安全性を高
めることができ、また、負極にリチウムを用いた場合、
電池の長期信韻性、安全性が向上し、発明による効果は
非常に大きい。As described above, according to the present invention, the structure of the sealing part becomes sturdy and strong, improving the sealing effect and increasing safety. Furthermore, when lithium is used for the negative electrode,
The long-term reliability and safety of batteries have been improved, and the effects of this invention are very large.
第１図は本発明密閉型電池の一実施例における扁平形電
池の断面図、第２図は、本発明品の封止部と、従来の密
閉型電池（従来品）の封止部との剥離強度を経時変化で
比較した比較図である。
１ａ・・・正極用集電体シート、１ｂ・・・負極用集電
体シート、２・・・正極活物質、３・・・高分子固体電
解質、４・・・負極活物質、５ａ・・・電池内側封止材
、５ｂ・・・電池外側封止材、６・・・エポキシ樹脂第
１図
第２図
期間（月）Fig. 1 is a cross-sectional view of a flat battery according to an embodiment of the sealed battery of the present invention, and Fig. 2 shows the relationship between the sealing part of the product of the present invention and the sealing part of a conventional sealed battery (conventional product). FIG. 3 is a comparison diagram comparing peel strength over time. 1a... Current collector sheet for positive electrode, 1b... Current collector sheet for negative electrode, 2... Positive electrode active material, 3... Polymer solid electrolyte, 4... Negative electrode active material, 5a...・Battery inner sealing material, 5b...Battery outer sealing material, 6...Epoxy resin Figure 1 Figure 2 Period (month)
Claims (1)
容器に封入した密閉型電池において、前記密閉容器の封
止部は、電池内側封止材と電池外側封止材とを有し、そ
の両者間にエポキシ樹脂接着剤が充填された構造である
ことを特徴とする密閉型電池。(1) In a sealed battery in which a power generation element in which a positive electrode, an electrolyte, and a negative electrode are laminated is sealed in a sealed container, the sealed portion of the sealed container includes a battery inner sealing material and a battery outer sealing material, A sealed battery characterized by having a structure in which an epoxy resin adhesive is filled between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2293051A JPH04167351A (en) | 1990-10-30 | 1990-10-30 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2293051A JPH04167351A (en) | 1990-10-30 | 1990-10-30 | Sealed battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04167351A true JPH04167351A (en) | 1992-06-15 |
Family
ID=17789845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2293051A Pending JPH04167351A (en) | 1990-10-30 | 1990-10-30 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04167351A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002042884A (en) * | 2000-07-19 | 2002-02-08 | Mitsubishi Chemicals Corp | Plate laminated battery and method of manufacturing plate laminated battery |
| JP2005317380A (en) * | 2004-04-28 | 2005-11-10 | Nissan Motor Co Ltd | Bipolar battery, manufacturing method of bipolar battery, battery pack, and automobile using this battery pack |
| JP2019521498A (en) * | 2016-07-19 | 2019-07-25 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Battery cell comprising housing parts closely adhered to each other by a three-layer adhesive composite, and method and apparatus for its manufacture |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60216440A (en) * | 1984-04-10 | 1985-10-29 | Matsushita Electric Ind Co Ltd | Flat type cell |
| JPS61176054A (en) * | 1985-01-29 | 1986-08-07 | Matsushita Electric Ind Co Ltd | Flat cell |
-
1990
- 1990-10-30 JP JP2293051A patent/JPH04167351A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60216440A (en) * | 1984-04-10 | 1985-10-29 | Matsushita Electric Ind Co Ltd | Flat type cell |
| JPS61176054A (en) * | 1985-01-29 | 1986-08-07 | Matsushita Electric Ind Co Ltd | Flat cell |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002042884A (en) * | 2000-07-19 | 2002-02-08 | Mitsubishi Chemicals Corp | Plate laminated battery and method of manufacturing plate laminated battery |
| JP2005317380A (en) * | 2004-04-28 | 2005-11-10 | Nissan Motor Co Ltd | Bipolar battery, manufacturing method of bipolar battery, battery pack, and automobile using this battery pack |
| JP2019521498A (en) * | 2016-07-19 | 2019-07-25 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Battery cell comprising housing parts closely adhered to each other by a three-layer adhesive composite, and method and apparatus for its manufacture |
| US10923692B2 (en) | 2016-07-19 | 2021-02-16 | Robert Bosch Gmbh | Battery cell with housing components which are adhesively bonded to one another in a sealed manner by a three-layer adhesive composite, and method and apparatus for manufacturing said battery cell |
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