JPS5864750A - Thin battery - Google Patents
Thin batteryInfo
- Publication number
- JPS5864750A JPS5864750A JP56161650A JP16165081A JPS5864750A JP S5864750 A JPS5864750 A JP S5864750A JP 56161650 A JP56161650 A JP 56161650A JP 16165081 A JP16165081 A JP 16165081A JP S5864750 A JPS5864750 A JP S5864750A
- Authority
- JP
- Japan
- Prior art keywords
- resin layer
- acid copolymer
- layer
- battery
- aluminum foil
- 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
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
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
- H01M50/126—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers
-
- 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
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- 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
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/121—Organic material
-
- 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
- H01M50/131—Primary casings, jackets or wrappings of a single cell or a single battery characterised by physical properties, e.g. gas-permeability or size
- H01M50/133—Thickness
-
- 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
Abstract
Description
【発明の詳細な説明】
本発明は、扁平電池における外装フィルムの改良に関し
、通気性遮断のために多層フィルムの一層をなすアルミ
ニウム箔の電池内部への溶出を防いで、電池の保存性能
を向上させることを目的とするものである。Detailed Description of the Invention The present invention relates to improving the exterior film of a flat battery, and improves the storage performance of the battery by preventing the aluminum foil that forms one layer of the multilayer film from leaking into the battery to block air permeability. The purpose is to
この種扁平電池の外装フィルムの従来の構成例を第１図
、第２図に示す。Examples of the conventional structure of the exterior film of this type of flat battery are shown in FIGS. 1 and 2.
第１図はアルミニウム箔層１の内面にエチレン２、〜
一アクリル酸共重合樹脂層２をラミネートし、さらにア
ルミニウム箔層１の外面にエチレン−アクリル酸共重合
体樹脂の熱接着温度よりも高い融点を有する樹脂層３を
ラミネートした外装フィルムである。Figure 1 shows that ethylene 2 and monoacrylic acid copolymer resin layer 2 are laminated on the inner surface of aluminum foil layer 1, and the outer surface of aluminum foil layer 1 is laminated with a thermal bonding temperature higher than that of the ethylene-acrylic acid copolymer resin. This is an exterior film laminated with a resin layer 3 having a melting point.
アルミニウム箔層１は、通常厚さ７〜３０μ程度の軟質
のアルミニウムからなり、エチレン−アクリル酸共重合
樹脂層２は１ｏ〜１ｏ○μ程度の厚さである。外側の樹
脂層３は、エチレン−アクリル酸共重合樹脂の熱接着温
度１５０〜１７０℃程度よりも１０℃以上高い融点を有
するポリエステル、ポリプロピレン、ナイロン等の厚さ
１０〜１００μ程度のものからなる。The aluminum foil layer 1 is made of soft aluminum and usually has a thickness of about 7 to 30 μm, and the ethylene-acrylic acid copolymer resin layer 2 has a thickness of about 10 to 10 μm. The outer resin layer 3 is made of polyester, polypropylene, nylon, or the like having a thickness of about 10 to 100 μm and having a melting point higher than the thermal bonding temperature of the ethylene-acrylic acid copolymer resin by about 150 to 170° C. by 10° C. or more.
第２図は外装フィルムに印刷を施した場合の従来例を示
している。第２図中、１，２．３は第１図のそれと同様
である。４が印刷層で、６は接着剤層である。接着剤層
は、たとえばエステル系。FIG. 2 shows a conventional example of printing on an exterior film. In FIG. 2, 1, 2.3 are the same as those in FIG. 4 is a printing layer, and 6 is an adhesive layer. The adhesive layer is, for example, ester-based.
ウレタン系、イソシアネート系等の溶液型接着剤、ある
いは溶融ポリエチレン樹脂の様な接着剤である。These are solution-type adhesives such as urethane-based and isocyanate-based adhesives, or adhesives such as molten polyethylene resin.
３Ｌ−
これら従来の外装フィルムの欠点は、扁平電池を構成し
た場合、外装フィルムのアルミニウムが溶出する危険が
あることである。この原因は電池構成時に金属集電体を
外装フィルムに熱融着する際、アルミニウム箔層が露出
することにある。第６図にその状態を示している。図中
６は金属集電体であり、エチレン−アクリル酸共重合体
２と、この金属集電体６との境界部分にアルミニウム箔
の露出部７が生じ易い。この露出部７から、電解液中に
アルミニウムが溶出し始めて、電池電圧の低下、さらに
は保存時に電解液が蒸発するなどの整置を招く。3L- A drawback of these conventional exterior films is that when a flat battery is constructed, there is a risk that the aluminum of the exterior film will be leached. The reason for this is that the aluminum foil layer is exposed when the metal current collector is heat-sealed to the exterior film during battery construction. FIG. 6 shows this state. In the figure, 6 is a metal current collector, and an exposed portion 7 of the aluminum foil is likely to occur at the boundary between the ethylene-acrylic acid copolymer 2 and this metal current collector 6. Aluminum begins to dissolve into the electrolyte from this exposed portion 7, resulting in a drop in battery voltage and, furthermore, evaporation of the electrolyte during storage.
本発明はこのような従来の問題点を解決した外装フィル
ムを提供するものであり、第３図にその一実施例を示し
ている。アルミニウム箔層１の外面と内面との両面にエ
チレン−アクリル酸共重合樹脂層２の熱接着温度よりも
高い融点を有する樹脂層３，３′を設け、さらに内面に
エチレン−アクそれよりも高い融点の樹脂層３′との間
に２と３′の接着力をより一層強くする樹脂層８を設け
たものである。The present invention provides an exterior film that solves these conventional problems, and one embodiment thereof is shown in FIG. Resin layers 3 and 3' having a melting point higher than the thermal bonding temperature of the ethylene-acrylic acid copolymer resin layer 2 are provided on both the outer and inner surfaces of the aluminum foil layer 1, and the ethylene-acrylic acid copolymer resin layer 2 has a melting point higher than that on the inner surface. A resin layer 8 is provided between the melting point resin layer 3' and the resin layer 8 to further strengthen the adhesive force between 2 and 3'.
第６図は、さらにアルミニウム箔層１の外面に印刷層４
のための接着剤層６を設けた本発明の他の実施例である
。FIG. 6 further shows a printed layer 4 on the outer surface of the aluminum foil layer 1.
This is another embodiment of the present invention in which an adhesive layer 6 is provided.
これら３つの実施例のアルミニウム箔層１の厚みは７〜
３０μ程度、エチレン−アクリル酸共重合樹脂層２は１
０〜５０μ程度、樹脂層３，３′はエチレン−アクリル
酸共重合樹脂の熱接着温度１５０’ｌ：程度よりも１０
’Ｃ以上高い融点を有するポリエステル、ポリプロピレ
ン、ナイロン等の厚さ１０〜５０μ程度の層である。The thickness of the aluminum foil layer 1 in these three examples is 7~
Approximately 30μ, ethylene-acrylic acid copolymer resin layer 2 is 1
0 to 50μ, resin layers 3 and 3' have an ethylene-acrylic acid copolymer resin thermal adhesion temperature of 150'l: 10
The layer is made of polyester, polypropylene, nylon, etc. and has a thickness of about 10 to 50 μm and has a melting point higher than 'C'.
このような本発明の外装フィルム９は、第７図の如く用
いられる。Such an exterior film 9 of the present invention is used as shown in FIG.
すなわち、王権金属集電体１ｏと外装フィルム９、負極
金属集体１４と外装フィルム９とはそれぞれ熱融着され
ている。That is, the royal metal current collector 1o and the exterior film 9, and the negative electrode metal collector 14 and the exterior film 9 are each thermally fused.
それぞれの金属集電体には正極１１と負極１３が電気的
に接触しており、正極１１と負極１３との間Ｖｃ電解液
を含むセパレータ１２が存在して扁平電池を構成してい
る。電池外周１５は外装フィルム相互を熱融着して気密
状態となっている。A positive electrode 11 and a negative electrode 13 are in electrical contact with each metal current collector, and a separator 12 containing a Vc electrolyte is present between the positive electrode 11 and the negative electrode 13 to constitute a flat battery. The battery outer periphery 15 is made airtight by heat-sealing the exterior films to each other.
この本発明の外装フィルムを使用することにより、第８
図に示すように樹脂層３′があるため金属集電体６と接
触しているエチレン−アクリル酸共重合樹脂層２が集電
体６の鋭角的な端部６−１により破られても樹脂層３′
がアルミニウム箔層１と集電体６およびその端部６−１
の間に介在し、アルミニウム箔層１は第６図勿ｊで示す
ようなアルミニウム箔１の露出部７を樹脂層３′により
完全に阻止することができ、その結果アルミニウムが電
解液中に溶出し電池電圧を減少させる不良が皆無になっ
た。ちなみに従来の層２の破損によるアルミニウム露出
に起因した不良は８チ程度あった。By using the exterior film of the present invention, the eighth
As shown in the figure, since there is a resin layer 3', even if the ethylene-acrylic acid copolymer resin layer 2 in contact with the metal current collector 6 is torn by the sharp edge 6-1 of the current collector 6, Resin layer 3'
is the aluminum foil layer 1, the current collector 6 and its end 6-1
The aluminum foil layer 1 can completely block the exposed portion 7 of the aluminum foil 1 as shown in FIG. There are no defects that reduce battery voltage. By the way, there were about 8 defects caused by aluminum exposure due to damage to layer 2 in the conventional method.
さらに本発明の外装フィルムでは保存中ｆエチレンーア
クリル酸共重合樹脂層の破損ないしは薄くなった箇所か
らのアルミニウムの溶出も認められなく、保存性能を向
上させることができた。Furthermore, in the exterior film of the present invention, no elution of aluminum from areas where the ethylene-acrylic acid copolymer resin layer was damaged or thinned during storage was observed, and the storage performance was improved.
第１図および第２図は従来の扁平電池の外装フィルムを
示す断面図、第３図は本発明の実施例における扁平電池
の外装フィルムを示す断面図、第４図、第６図は本発明
の別の実施例における外装フィルムを示す断面図、第６
図は従来の扁平電池において電池不良を起こす原因を示
す断面図、第７図は本発明の扁平Ｎ池の構成の一例を示
す断面図、第８図は本発明の外装フィルムと金属集電体
との熱接着例を示す断面図である。
１・・・・・・アルミニウム箔層、２・川・・エチレン
−アクリル酸共重合樹脂層、３，３′川・・・２の熱接
着温度よりも高い融点を有する樹脂層、９・・・・・・
外装フィルム、１１・・・・・・正極、１２・・・用セ
パレータ、１３・・・・・・負極、１０．１４・・・・
・・金属集電体。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
第３図
＠５図
第６図1 and 2 are cross-sectional views showing the exterior film of a conventional flat battery, FIG. 3 is a cross-sectional view showing the exterior film of a flat battery according to an embodiment of the present invention, and FIGS. 4 and 6 are cross-sectional views showing the exterior film of a flat battery according to an embodiment of the present invention. Cross-sectional view showing the exterior film in another example of , No. 6
The figure is a cross-sectional view showing the causes of battery failure in conventional flat batteries, Figure 7 is a cross-sectional view showing an example of the structure of the flat N battery of the present invention, and Figure 8 is the exterior film and metal current collector of the present invention. FIG. 3 is a cross-sectional view showing an example of thermal bonding with. 1... Aluminum foil layer, 2... Ethylene-acrylic acid copolymer resin layer, 3, 3'... Resin layer having a melting point higher than the thermal bonding temperature of 2, 9...・・・・・・
Exterior film, 11... Positive electrode, 12... Separator for, 13... Negative electrode, 10.14...
...Metal current collector. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 @ 5 Figure 6
Claims (1)
重合樹脂層の熱接着温度よりも高い融点を有する樹脂層
を設け、さらに扁平な発電要素と接する前記内面側樹脂
層にエチレン−アクリル酸共重合樹脂層をラミネートし
た外装フィルムにより、発電要素を外装したことを特徴
とする扁平電池。A resin layer having a melting point higher than the thermal adhesion temperature of the ethylene-acrylic acid copolymer resin layer is provided on both the inner and outer surfaces of the aluminum foil layer, and an ethylene-acrylic acid copolymer resin is provided on the inner side resin layer that is in contact with the flat power generation element. A flat battery characterized by having a power generation element packaged with an exterior film made of laminated layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56161650A JPS5864750A (en) | 1981-10-09 | 1981-10-09 | Thin battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56161650A JPS5864750A (en) | 1981-10-09 | 1981-10-09 | Thin battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5864750A true JPS5864750A (en) | 1983-04-18 |
Family
ID=15739215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56161650A Pending JPS5864750A (en) | 1981-10-09 | 1981-10-09 | Thin battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5864750A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100879466B1 (en) * | 2002-09-11 | 2009-01-20 | 삼성에스디아이 주식회사 | Pouch-type container for containg electrodes assembly |
| JP2019139844A (en) * | 2018-02-06 | 2019-08-22 | トヨタ自動車株式会社 | Laminate type battery |
-
1981
- 1981-10-09 JP JP56161650A patent/JPS5864750A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100879466B1 (en) * | 2002-09-11 | 2009-01-20 | 삼성에스디아이 주식회사 | Pouch-type container for containg electrodes assembly |
| JP2019139844A (en) * | 2018-02-06 | 2019-08-22 | トヨタ自動車株式会社 | Laminate type battery |
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